fix: add Google Chat to list of alert types when determining valid providers (#341)

Relevant: #336

.examples/docker-compose-grafana-prometheus/README.md

@@ -1,23 +1,41 @@
 ## Usage
+Gatus exposes Prometheus metrics at `/metrics` if the `metrics` configuration option is set to `true`.
+
+To run this example, all you need to do is execute the following command:
 ```console
 docker-compose up
 ```
 Once you've done the above, you should be able to access the Grafana dashboard at `http://localhost:3000`.
 
-## Queries
+![Gatus Grafana dashboard](../../.github/assets/grafana-dashboard.png)
-Gatus uses Prometheus counters.
 
-Total results per minute:
+
+## Queries
+By default, this example has a Grafana dashboard with some panels, but for the sake of verbosity, you'll find
+a list of simple queries below. Those make use of the `key` parameter, which is a concatenation of the endpoint's
+group and name.
+
+### Success rate
+```
+sum(rate(gatus_results_total{success="true"}[30s])) by (key) / sum(rate(gatus_results_total[30s])) by (key)
+```
+
+### Response time
+```
+gatus_results_duration_seconds
+```
+
+### Total results per minute
 ```
 sum(rate(gatus_results_total[5m])*60) by (key)
 ```
 
-Total successful results per minute:
+### Total successful results per minute
 ```
 sum(rate(gatus_results_total{success="true"}[5m])*60) by (key)
 ```
 
-Total unsuccessful results per minute:
+### Total unsuccessful results per minute
 ```
-sum(rate(gatus_results_total{success="true"}[5m])*60) by (key)
+sum(rate(gatus_results_total{success="false"}[5m])*60) by (key)
 ```

.examples/docker-compose-grafana-prometheus/config/config.yaml

@@ -2,15 +2,18 @@ metrics: true
 endpoints:
   - name: website
     url: https://twin.sh/health
-    interval: 30s
+    interval: 5m
     conditions:
       - "[STATUS] == 200"
+
+  - name: example
+    url: https://example.com/
+    interval: 5m
+    conditions:
+      - "[STATUS] == 200"
+
   - name: github
     url: https://api.github.com/healthz
     interval: 5m
     conditions:
       - "[STATUS] == 200"
-  - name: example
-    url: https://example.com/
-    conditions:
-      - "[STATUS] == 200"

.examples/docker-compose-grafana-prometheus/docker-compose.yml

@@ -7,7 +7,7 @@ services:
     ports:
       - "8080:8080"
     volumes:
-      - ./config.yaml:/config/config.yaml
+      - ./config:/config
     networks:
       - metrics
 

.examples/docker-compose-grafana-prometheus/grafana/provisioning/dashboards/gatus.json

@@ -15,8 +15,266 @@
   "editable": true,
   "gnetId": null,
   "graphTooltip": 0,
+  "id": 3,
   "links": [],
   "panels": [
+    {
+      "cacheTimeout": null,
+      "datasource": null,
+      "description": "Number of successful results compared to the total number of results during the current interval",
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "id": 9,
+      "links": [],
+      "options": {
+        "fieldOptions": {
+          "calcs": [
+            "mean"
+          ],
+          "defaults": {
+            "mappings": [
+              {
+                "id": 0,
+                "op": "=",
+                "text": "N/A",
+                "type": 1,
+                "value": "null"
+              }
+            ],
+            "max": 1,
+            "min": 0,
+            "nullValueMode": "connected",
+            "thresholds": [
+              {
+                "color": "red",
+                "value": null
+              },
+              {
+                "color": "semi-dark-orange",
+                "value": 0.6
+              },
+              {
+                "color": "yellow",
+                "value": 0.8
+              },
+              {
+                "color": "dark-green",
+                "value": 0.95
+              }
+            ],
+            "unit": "percentunit"
+          },
+          "override": {},
+          "values": false
+        },
+        "orientation": "horizontal",
+        "showThresholdLabels": false,
+        "showThresholdMarkers": false
+      },
+      "pluginVersion": "6.4.4",
+      "targets": [
+        {
+          "expr": "sum(rate(gatus_results_total{success=\"true\"}[30s])) by (key) / sum(rate(gatus_results_total[30s])) by (key)",
+          "hide": false,
+          "legendFormat": "{{key}}",
+          "refId": "B"
+        }
+      ],
+      "timeFrom": null,
+      "timeShift": null,
+      "title": "Success rate",
+      "type": "gauge"
+    },
+    {
+      "aliasColors": {},
+      "bars": false,
+      "cacheTimeout": null,
+      "dashLength": 10,
+      "dashes": false,
+      "datasource": null,
+      "fill": 1,
+      "fillGradient": 0,
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 0
+      },
+      "id": 11,
+      "legend": {
+        "avg": false,
+        "current": false,
+        "max": false,
+        "min": false,
+        "show": true,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 1,
+      "links": [],
+      "nullPointMode": "null as zero",
+      "options": {
+        "dataLinks": []
+      },
+      "percentage": false,
+      "pluginVersion": "6.4.4",
+      "pointradius": 2,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "expr": "gatus_results_duration_seconds",
+          "format": "time_series",
+          "instant": false,
+          "interval": "",
+          "intervalFactor": 1,
+          "legendFormat": "{{key}}",
+          "refId": "A"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Response time",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        }
+      ],
+      "yaxis": {
+        "align": false,
+        "alignLevel": null
+      }
+    },
+    {
+      "aliasColors": {},
+      "bars": false,
+      "cacheTimeout": null,
+      "dashLength": 10,
+      "dashes": false,
+      "datasource": null,
+      "fill": 1,
+      "fillGradient": 0,
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 8
+      },
+      "id": 10,
+      "legend": {
+        "avg": false,
+        "current": false,
+        "max": false,
+        "min": false,
+        "show": true,
+        "total": false,
+        "values": false
+      },
+      "lines": true,
+      "linewidth": 1,
+      "links": [],
+      "nullPointMode": "connected",
+      "options": {
+        "dataLinks": []
+      },
+      "percentage": false,
+      "pluginVersion": "6.4.4",
+      "pointradius": 2,
+      "points": true,
+      "renderer": "flot",
+      "seriesOverrides": [],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "expr": "sum(rate(gatus_results_total{success=\"true\"}[30s])) by (key) / sum(rate(gatus_results_total[30s])) by (key)",
+          "format": "time_series",
+          "instant": false,
+          "interval": "",
+          "intervalFactor": 1,
+          "legendFormat": "{{key}}",
+          "refId": "A"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Success rate",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        },
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        }
+      ],
+      "yaxis": {
+        "align": false,
+        "alignLevel": null
+      }
+    },
     {
       "aliasColors": {},
       "bars": false,
@@ -27,10 +285,10 @@
       "fill": 1,
       "fillGradient": 0,
       "gridPos": {
-        "h": 7,
+        "h": 8,
         "w": 12,
-        "x": 0,
+        "x": 12,
-        "y": 0
+        "y": 8
       },
       "id": 2,
       "interval": "",
@@ -126,8 +384,8 @@
       "gridPos": {
         "h": 7,
         "w": 12,
-        "x": 12,
+        "x": 0,
-        "y": 0
+        "y": 16
       },
       "id": 5,
       "legend": {
@@ -204,94 +462,6 @@
         "alignLevel": null
       }
     },
-    {
-      "cacheTimeout": null,
-      "colorBackground": false,
-      "colorPostfix": false,
-      "colorPrefix": false,
-      "colorValue": true,
-      "colors": [
-        "#299c46",
-        "rgba(237, 129, 40, 0.89)",
-        "#d44a3a"
-      ],
-      "datasource": null,
-      "format": "none",
-      "gauge": {
-        "maxValue": 100,
-        "minValue": 0,
-        "show": false,
-        "thresholdLabels": false,
-        "thresholdMarkers": true
-      },
-      "gridPos": {
-        "h": 7,
-        "w": 12,
-        "x": 0,
-        "y": 7
-      },
-      "id": 7,
-      "interval": "",
-      "links": [],
-      "mappingType": 1,
-      "mappingTypes": [
-        {
-          "name": "value to text",
-          "value": 1
-        },
-        {
-          "name": "range to text",
-          "value": 2
-        }
-      ],
-      "maxDataPoints": 100,
-      "nullPointMode": "connected",
-      "nullText": null,
-      "options": {},
-      "postfix": "",
-      "postfixFontSize": "50%",
-      "prefix": "",
-      "prefixFontSize": "50%",
-      "rangeMaps": [
-        {
-          "from": "null",
-          "text": "N/A",
-          "to": "null"
-        }
-      ],
-      "sparkline": {
-        "fillColor": "rgba(31, 118, 189, 0.18)",
-        "full": false,
-        "lineColor": "rgb(31, 120, 193)",
-        "show": true,
-        "ymax": null,
-        "ymin": null
-      },
-      "tableColumn": "",
-      "targets": [
-        {
-          "expr": "rate(gatus_results_total{success=\"false\"}[1m])*60",
-          "format": "time_series",
-          "instant": false,
-          "intervalFactor": 1,
-          "refId": "A"
-        }
-      ],
-      "thresholds": "1,2",
-      "timeFrom": null,
-      "timeShift": null,
-      "title": "Unsuccessful results",
-      "type": "singlestat",
-      "valueFontSize": "150%",
-      "valueMaps": [
-        {
-          "op": "=",
-          "text": "N/A",
-          "value": "null"
-        }
-      ],
-      "valueName": "current"
-    },
     {
       "aliasColors": {},
       "bars": false,
@@ -304,7 +474,7 @@
         "h": 7,
         "w": 12,
         "x": 12,
-        "y": 7
+        "y": 16
       },
       "id": 3,
       "legend": {
@@ -380,7 +550,7 @@
       }
     }
   ],
-  "refresh": "10s",
+  "refresh": "1m",
   "schemaVersion": 20,
   "style": "dark",
   "tags": [],
@@ -391,9 +561,22 @@
     "from": "now-1h",
     "to": "now"
   },
-  "timepicker": {},
+  "timepicker": {
+    "refresh_intervals": [
+      "5s",
+      "10s",
+      "30s",
+      "1m",
+      "5m",
+      "15m",
+      "30m",
+      "1h",
+      "2h",
+      "1d"
+    ]
+  },
   "timezone": "",
   "title": "Gatus",
   "uid": "KPI7Qj1Wk",
-  "version": 1
+  "version": 2
 }

.examples/docker-compose-mattermost/docker-compose.yml

@@ -6,7 +6,7 @@ services:
     ports:
       - "8080:8080"
     volumes:
-      - ./config.yaml:/config/config.yaml
+      - ./config:/config
     networks:
       - default
 

.examples/docker-compose-postgres-storage/config/config.yaml

@@ -26,7 +26,7 @@ endpoints:
       - "[STATUS] == 200"
 
   - name: example-dns-query
-    url: "8.8.8.8" # Address of the DNS server to use
+    url: "1.1.1.1" # Address of the DNS server to use
     interval: 5m
     dns:
       query-name: "example.com"

.examples/docker-compose-postgres-storage/docker-compose.yml

@@ -19,7 +19,7 @@ services:
     ports:
       - "8080:8080"
     volumes:
-      - ./config.yaml:/config/config.yaml
+      - ./config:/config
     networks:
       - web
     depends_on:

.examples/docker-compose-sqlite-storage/config/config.yaml

@@ -26,7 +26,7 @@ endpoints:
       - "[STATUS] == 200"
 
   - name: example-dns-query
-    url: "8.8.8.8" # Address of the DNS server to use
+    url: "1.1.1.1" # Address of the DNS server to use
     interval: 5m
     dns:
       query-name: "example.com"

.examples/docker-compose-sqlite-storage/docker-compose.yml

@@ -5,5 +5,5 @@ services:
     ports:
       - "8080:8080"
     volumes:
-      - ./config.yaml:/config/config.yaml
+      - ./config:/config
       - ./data:/data/

.examples/docker-compose/docker-compose.yml

@@ -5,4 +5,4 @@ services:
     ports:
       - 8080:8080
     volumes:
-      - ./config.yaml:/config/config.yaml
+      - ./config:/config

.examples/kubernetes/gatus.yaml

@@ -54,10 +54,10 @@ spec:
       app: gatus
   template:
     metadata:
-      labels:
-        app: gatus
       name: gatus
       namespace: kube-system
+      labels:
+        app: gatus
     spec:
       serviceAccountName: gatus
       terminationGracePeriodSeconds: 5
@@ -76,6 +76,22 @@ spec:
             requests:
               cpu: 50m
               memory: 30M
+          readinessProbe:
+            httpGet:
+              path: /health
+              port: 8080
+            initialDelaySeconds: 5
+            periodSeconds: 10
+            successThreshold: 1
+            failureThreshold: 3
+          livenessProbe:
+            httpGet:
+              path: /health
+              port: 8080
+            initialDelaySeconds: 10
+            periodSeconds: 10
+            successThreshold: 1
+            failureThreshold: 5
           volumeMounts:
             - mountPath: /config
               name: gatus-config

.github/workflows/benchmark.yml

@@ -0,0 +1,26 @@
+name: benchmark
+on:
+  workflow_dispatch:
+    inputs:
+      repository:
+        description: "Repository to checkout. Useful for benchmarking a fork. Format should be <owner>/<repository>."
+        required: true
+        default: "TwiN/gatus"
+      ref:
+        description: "Branch, tag or SHA to checkout"
+        required: true
+        default: "master"
+jobs:
+  build:
+    name: benchmark
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.18
+          repository: "${{ github.event.inputs.repository }}"
+          ref: "${{ github.event.inputs.ref }}"
+      - uses: actions/checkout@v3
+      - name: Benchmark
+        run: go test -bench=. ./storage/store

.github/workflows/build.yml

@@ -10,16 +10,14 @@ on:
       - '*.md'
 jobs:
   build:
-    name: Build
+    name: build
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - name: Set up Go
+      - uses: actions/setup-go@v3
-        uses: actions/setup-go@v2
         with:
-          go-version: 1.17
+          go-version: 1.18
-      - name: Check out code into the Go module directory
+      - uses: actions/checkout@v3
-        uses: actions/checkout@v2
       - name: Build binary to make sure it works
         run: go build -mod vendor
       - name: Test

.github/workflows/publish-experimental.yml

@@ -0,0 +1,27 @@
+name: publish-experimental
+on: [workflow_dispatch]
+jobs:
+  publish-experimental:
+    name: publish-experimental
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    steps:
+      - uses: actions/checkout@v3
+      - name: Get image repository
+        run: echo IMAGE_REPOSITORY=$(echo ${{ secrets.DOCKER_USERNAME }}/${{ github.event.repository.name }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Login to Docker Registry
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Build and push docker image
+        uses: docker/build-push-action@v3
+        with:
+          platforms: linux/amd64
+          pull: true
+          push: true
+          tags: ${{ env.IMAGE_REPOSITORY }}:experimental

.github/workflows/publish-latest.yml

@@ -4,15 +4,17 @@ on:
     workflows: ["build"]
     branches: [master]
     types: [completed]
+concurrency:
+  group: ${{ github.workflow }}
+  cancel-in-progress: true
 jobs:
   publish-latest:
-    name: Publish latest
+    name: publish-latest
     runs-on: ubuntu-latest
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
-    timeout-minutes: 45
+    timeout-minutes: 60
     steps:
-      - name: Check out code
+      - uses: actions/checkout@v3
-        uses: actions/checkout@v2
       - name: Get image repository
         run: echo IMAGE_REPOSITORY=$(echo ${{ secrets.DOCKER_USERNAME }}/${{ github.event.repository.name }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
       - name: Set up QEMU
@@ -20,15 +22,14 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
       - name: Login to Docker Registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
       - name: Build and push docker image
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v3
         with:
           platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
           pull: true
           push: true
-          tags: |
+          tags: ${{ env.IMAGE_REPOSITORY }}:latest
-            ${{ env.IMAGE_REPOSITORY }}:latest

.github/workflows/publish-release.yml

@@ -4,12 +4,11 @@ on:
     types: [published]
 jobs:
   publish-release:
-    name: Publish release
+    name: publish-release
     runs-on: ubuntu-latest
-    timeout-minutes: 45
+    timeout-minutes: 60
     steps:
-      - name: Check out code
+      - uses: actions/checkout@v3
-        uses: actions/checkout@v2
       - name: Get image repository
         run: echo IMAGE_REPOSITORY=$(echo ${{ secrets.DOCKER_USERNAME }}/${{ github.event.repository.name }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
       - name: Get the release
@@ -19,15 +18,14 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
       - name: Login to Docker Registry
-        uses: docker/login-action@v1
+        uses: docker/login-action@v2
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
       - name: Build and push docker image
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v3
         with:
           platforms: linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64
           pull: true
           push: true
-          tags: |
+          tags: ${{ env.IMAGE_REPOSITORY }}:${{ env.RELEASE }},${{ env.IMAGE_REPOSITORY }}:stable
-            ${{ env.IMAGE_REPOSITORY }}:${{ env.RELEASE }}

Dockerfile

@@ -13,7 +13,6 @@ RUN CGO_ENABLED=0 GOOS=linux go build -mod vendor -a -installsuffix cgo -o gatus
 FROM scratch
 COPY --from=builder /app/gatus .
 COPY --from=builder /app/config.yaml ./config/config.yaml
-COPY --from=builder /app/web/static ./web/static
 COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
 ENV PORT=8080
 EXPOSE ${PORT}

LICENSE

@@ -186,7 +186,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright 2021 TwiN
+   Copyright [yyyy] [name of copyright owner]
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

Makefile

@@ -1,5 +1,8 @@
 BINARY=gatus
 
+# Because there's a folder called "test", we need to make the target "test" phony
+.PHONY: test
+
 install:
 	go build -mod vendor -o $(BINARY) .
 
@@ -10,7 +13,7 @@ clean:
 	rm $(BINARY)
 
 test:
-	sudo go test ./alerting/... ./client/... ./config/... ./controller/... ./core/... ./jsonpath/... ./pattern/... ./security/... ./storage/... ./util/... ./watchdog/... -cover
+	go test ./... -cover
 
 
 ##########

README.md

@@ -7,7 +7,7 @@
 [![Docker pulls](https://img.shields.io/docker/pulls/twinproduction/gatus.svg)](https://cloud.docker.com/repository/docker/twinproduction/gatus)
 [![Follow TwiN](https://img.shields.io/github/followers/TwiN?label=Follow&style=social)](https://github.com/TwiN)
 
-Gatus is a health dashboard that gives you the ability to monitor your services using HTTP, ICMP, TCP, and even DNS
+Gatus is a developer-oriented health dashboard that gives you the ability to monitor your services using HTTP, ICMP, TCP, and even DNS
 queries as well as evaluate the result of said queries by using a list of conditions on values like the status code,
 the response time, the certificate expiration, the body and many others. The icing on top is that each of these health
 checks can be paired with alerting via Slack, PagerDuty, Discord, Twilio and more.
@@ -26,7 +26,10 @@ For more details, see [Usage](#usage)
 
 ![Gatus dashboard conditions](.github/assets/dashboard-conditions.png)
 
-Have any feedback or want to share your good/bad experience with Gatus? Feel free to email me at [feedback@gatus.io](mailto:feedback@gatus.io)
+Have any feedback or questions? [Create a discussion](https://github.com/TwiN/gatus/discussions/new).
+
+Like this project? Please consider [sponsoring me](https://github.com/sponsors/TwiN).
+
 
 ## Table of Contents
 - [Why Gatus?](#why-gatus)
@@ -42,8 +45,10 @@ Have any feedback or want to share your good/bad experience with Gatus? Feel fre
     - [Configuring Discord alerts](#configuring-discord-alerts)
     - [Configuring Email alerts](#configuring-email-alerts)
     - [Configuring Google Chat alerts](#configuring-google-chat-alerts)
+    - [Configuring Matrix alerts](#configuring-matrix-alerts)
     - [Configuring Mattermost alerts](#configuring-mattermost-alerts)
     - [Configuring Messagebird alerts](#configuring-messagebird-alerts)
+    - [Configuring Ntfy alerts](#configuring-ntfy-alerts)
     - [Configuring Opsgenie alerts](#configuring-opsgenie-alerts)
     - [Configuring PagerDuty alerts](#configuring-pagerduty-alerts)
     - [Configuring Slack alerts](#configuring-slack-alerts)
@@ -55,7 +60,9 @@ Have any feedback or want to share your good/bad experience with Gatus? Feel fre
   - [Maintenance](#maintenance)
   - [Security](#security)
     - [Basic](#basic)
-    - [OIDC (ALPHA)](#oidc-alpha)
+    - [OIDC](#oidc)
+  - [Metrics](#metrics)
+  - [Remote instances (EXPERIMENTAL)](#remote-instances-experimental)
 - [Deployment](#deployment)
   - [Docker](#docker)
   - [Helm Chart](#helm-chart)
@@ -71,17 +78,20 @@ Have any feedback or want to share your good/bad experience with Gatus? Feel fre
   - [Monitoring an endpoint using DNS queries](#monitoring-an-endpoint-using-dns-queries)
   - [Monitoring an endpoint using STARTTLS](#monitoring-an-endpoint-using-starttls)
   - [Monitoring an endpoint using TLS](#monitoring-an-endpoint-using-tls)
+  - [Monitoring domain expiration](#monitoring-domain-expiration)
   - [disable-monitoring-lock](#disable-monitoring-lock)
   - [Reloading configuration on the fly](#reloading-configuration-on-the-fly)
   - [Endpoint groups](#endpoint-groups)
   - [Exposing Gatus on a custom port](#exposing-gatus-on-a-custom-port)
   - [Badges](#badges)
     - [Uptime](#uptime)
+    - [Health](#health)
     - [Response time](#response-time)
   - [API](#api)
   - [High level design overview](#high-level-design-overview)
 - [Sponsors](#sponsors)
 
+
 ## Why Gatus?
 Before getting into the specifics, I want to address the most common question:
 > Why would I use Gatus when I can just use Prometheus’ Alertmanager, Cloudwatch or even Splunk?
@@ -113,6 +123,7 @@ The main features of Gatus are:
 
 ![Gatus dashboard dark mode](.github/assets/dashboard-dark.png)
 
+
 ## Usage
 By default, the configuration file is expected to be at `config/config.yaml`.
 
@@ -145,48 +156,53 @@ If you want to test it locally, see [Docker](#docker).
 
 
 ## Configuration
-| Parameter                                       | Description                                                                                                                                 | Default                    |
+| Parameter                                       | Description                                                                                                                                        | Default                    |
-|:------------------------------------------------|:--------------------------------------------------------------------------------------------------------------------------------------------|:---------------------------|
+|:------------------------------------------------|:---------------------------------------------------------------------------------------------------------------------------------------------------|:---------------------------|
-| `debug`                                         | Whether to enable debug logs.                                                                                                               | `false`                    |
+| `debug`                                         | Whether to enable debug logs.                                                                                                                      | `false`                    |
-| `metrics`                                       | Whether to expose metrics at /metrics.                                                                                                      | `false`                    |
+| `metrics`                                       | Whether to expose metrics at /metrics.                                                                                                             | `false`                    |
-| `storage`                                       | [Storage configuration](#storage)                                                                                                           | `{}`                       |
+| `storage`                                       | [Storage configuration](#storage)                                                                                                                  | `{}`                       |
-| `endpoints`                                     | List of endpoints to monitor.                                                                                                               | Required `[]`              |
+| `endpoints`                                     | List of endpoints to monitor.                                                                                                                      | Required `[]`              |
-| `endpoints[].enabled`                           | Whether to monitor the endpoint.                                                                                                            | `true`                     |
+| `endpoints[].enabled`                           | Whether to monitor the endpoint.                                                                                                                   | `true`                     |
-| `endpoints[].name`                              | Name of the endpoint. Can be anything.                                                                                                      | Required `""`              |
+| `endpoints[].name`                              | Name of the endpoint. Can be anything.                                                                                                             | Required `""`              |
-| `endpoints[].group`                             | Group name. Used to group multiple endpoints together on the dashboard. <br />See [Endpoint groups](#endpoint-groups).                      | `""`                       |
+| `endpoints[].group`                             | Group name. Used to group multiple endpoints together on the dashboard. <br />See [Endpoint groups](#endpoint-groups).                             | `""`                       |
-| `endpoints[].url`                               | URL to send the request to.                                                                                                                 | Required `""`              |
+| `endpoints[].url`                               | URL to send the request to.                                                                                                                        | Required `""`              |
-| `endpoints[].method`                            | Request method.                                                                                                                             | `GET`                      |
+| `endpoints[].method`                            | Request method.                                                                                                                                    | `GET`                      |
-| `endpoints[].conditions`                        | Conditions used to determine the health of the endpoint. <br />See [Conditions](#conditions).                                               | `[]`                       |
+| `endpoints[].conditions`                        | Conditions used to determine the health of the endpoint. <br />See [Conditions](#conditions).                                                      | `[]`                       |
-| `endpoints[].interval`                          | Duration to wait between every status check.                                                                                                | `60s`                      |
+| `endpoints[].interval`                          | Duration to wait between every status check.                                                                                                       | `60s`                      |
-| `endpoints[].graphql`                           | Whether to wrap the body in a query param (`{"query":"$body"}`).                                                                            | `false`                    |
+| `endpoints[].graphql`                           | Whether to wrap the body in a query param (`{"query":"$body"}`).                                                                                   | `false`                    |
-| `endpoints[].body`                              | Request body.                                                                                                                               | `""`                       |
+| `endpoints[].body`                              | Request body.                                                                                                                                      | `""`                       |
-| `endpoints[].headers`                           | Request headers.                                                                                                                            | `{}`                       |
+| `endpoints[].headers`                           | Request headers.                                                                                                                                   | `{}`                       |
-| `endpoints[].dns`                               | Configuration for an endpoint of type DNS. <br />See [Monitoring an endpoint using DNS queries](#monitoring-an-endpoint-using-dns-queries). | `""`                       |
+| `endpoints[].dns`                               | Configuration for an endpoint of type DNS. <br />See [Monitoring an endpoint using DNS queries](#monitoring-an-endpoint-using-dns-queries).        | `""`                       |
-| `endpoints[].dns.query-type`                    | Query type (e.g. MX)                                                                                                                        | `""`                       |
+| `endpoints[].dns.query-type`                    | Query type (e.g. MX)                                                                                                                               | `""`                       |
-| `endpoints[].dns.query-name`                    | Query name (e.g. example.com)                                                                                                               | `""`                       |
+| `endpoints[].dns.query-name`                    | Query name (e.g. example.com)                                                                                                                      | `""`                       |
-| `endpoints[].alerts[].type`                     | Type of alert. <br />Valid types: `slack`, `discord`, `email`, `googlechat`, `pagerduty`, `twilio`, `mattermost`, `messagebird`, `teams` `custom`.        | Required `""`              |
+| `endpoints[].alerts[].type`                     | Type of alert. <br />Valid types: `slack`, `discord`, `email`, `googlechat`, `pagerduty`, `twilio`, `mattermost`, `messagebird`, `teams` `custom`. | Required `""`              |
-| `endpoints[].alerts[].enabled`                  | Whether to enable the alert.                                                                                                                | `false`                    |
+| `endpoints[].alerts[].enabled`                  | Whether to enable the alert.                                                                                                                       | `false`                    |
-| `endpoints[].alerts[].failure-threshold`        | Number of failures in a row needed before triggering the alert.                                                                             | `3`                        |
+| `endpoints[].alerts[].failure-threshold`        | Number of failures in a row needed before triggering the alert.                                                                                    | `3`                        |
-| `endpoints[].alerts[].success-threshold`        | Number of successes in a row before an ongoing incident is marked as resolved.                                                              | `2`                        |
+| `endpoints[].alerts[].success-threshold`        | Number of successes in a row before an ongoing incident is marked as resolved.                                                                     | `2`                        |
-| `endpoints[].alerts[].send-on-resolved`         | Whether to send a notification once a triggered alert is marked as resolved.                                                                | `false`                    |
+| `endpoints[].alerts[].send-on-resolved`         | Whether to send a notification once a triggered alert is marked as resolved.                                                                       | `false`                    |
-| `endpoints[].alerts[].description`              | Description of the alert. Will be included in the alert sent.                                                                               | `""`                       |
+| `endpoints[].alerts[].description`              | Description of the alert. Will be included in the alert sent.                                                                                      | `""`                       |
-| `endpoints[].client`                            | [Client configuration](#client-configuration).                                                                                              | `{}`                       |
+| `endpoints[].client`                            | [Client configuration](#client-configuration).                                                                                                     | `{}`                       |
-| `endpoints[].ui`                                | UI configuration at the endpoint level.                                                                                                     | `{}`                       |
+| `endpoints[].ui`                                | UI configuration at the endpoint level.                                                                                                            | `{}`                       |
-| `endpoints[].ui.hide-hostname`                  | Whether to include the hostname in the result.                                                                                              | `false`                    |
+| `endpoints[].ui.hide-hostname`                  | Whether to hide the hostname in the result.                                                                                                        | `false`                    |
-| `endpoints[].ui.dont-resolve-failed-conditions` | Whether to resolve failed conditions for the UI.                                                                                            | `false`                    |
+| `endpoints[].ui.hide-url`                       | Whether to ensure the URL is not displayed in the results. Useful if the URL contains a token.                                                     | `false`                    |
-| `alerting`                                      | [Alerting configuration](#alerting).                                                                                                        | `{}`                       |
+| `endpoints[].ui.dont-resolve-failed-conditions` | Whether to resolve failed conditions for the UI.                                                                                                   | `false`                    |
-| `security`                                      | [Security configuration](#security).                                                                                                        | `{}`                       |
+| `endpoints[].ui.badge.reponse-time`             | List of response time thresholds. Each time a threshold is reached, the badge has a different color.                                               | `[50, 200, 300, 500, 750]` |
-| `disable-monitoring-lock`                       | Whether to [disable the monitoring lock](#disable-monitoring-lock).                                                                         | `false`                    |
+| `alerting`                                      | [Alerting configuration](#alerting).                                                                                                               | `{}`                       |
-| `skip-invalid-config-update`                    | Whether to ignore invalid configuration update. <br />See [Reloading configuration on the fly](#reloading-configuration-on-the-fly).        | `false`                    |
+| `security`                                      | [Security configuration](#security).                                                                                                               | `{}`                       |
-| `web`                                           | Web configuration.                                                                                                                          | `{}`                       |
+| `disable-monitoring-lock`                       | Whether to [disable the monitoring lock](#disable-monitoring-lock).                                                                                | `false`                    |
-| `web.address`                                   | Address to listen on.                                                                                                                       | `0.0.0.0`                  |
+| `skip-invalid-config-update`                    | Whether to ignore invalid configuration update. <br />See [Reloading configuration on the fly](#reloading-configuration-on-the-fly).               | `false`                    |
-| `web.port`                                      | Port to listen on.                                                                                                                          | `8080`                     |
+| `web`                                           | Web configuration.                                                                                                                                 | `{}`                       |
-| `ui`                                            | UI configuration.                                                                                                                           | `{}`                       |
+| `web.address`                                   | Address to listen on.                                                                                                                              | `0.0.0.0`                  |
-| `ui.title`                                      | [Title of the document](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/title).                                                   | `Health Dashboard ǀ Gatus` |
+| `web.port`                                      | Port to listen on.                                                                                                                                 | `8080`                     |
-| `ui.header`                                     | Header at the top of the dashboard.                                                                                                         | `Health Status`            |
+| `ui`                                            | UI configuration.                                                                                                                                  | `{}`                       |
-| `ui.logo`                                       | URL to the logo to display.                                                                                                                 | `""`                       |
+| `ui.title`                                      | [Title of the document](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/title).                                                          | `Health Dashboard ǀ Gatus` |
-| `ui.link`                                       | Link to open when the logo is clicked.                                                                                                      | `""`                       |
+| `ui.header`                                     | Header at the top of the dashboard.                                                                                                                | `Health Status`            |
-| `maintenance`                                   | [Maintenance configuration](#maintenance).                                                                                                  | `{}`                       |
+| `ui.logo`                                       | URL to the logo to display.                                                                                                                        | `""`                       |
+| `ui.link`                                       | Link to open when the logo is clicked.                                                                                                             | `""`                       |
+| `ui.buttons`                                    | List of buttons to display below the header.                                                                                                       | `[]`                       |
+| `ui.buttons[].name`                             | Text to display on the button.                                                                                                                     | Required `""`              |
+| `ui.buttons[].link`                             | Link to open when the button is clicked.                                                                                                           | Required `""`              |
+| `maintenance`                                   | [Maintenance configuration](#maintenance).                                                                                                         | `{}`                       |
 
 
 ### Conditions
@@ -213,18 +229,20 @@ Here are some examples of conditions you can use:
 | `[BODY].name == pat(john*)`      | String at JSONPath `$.name` matches pattern `john*` | `{"name":"john.doe"}`      | `{"name":"bob"}` |
 | `[BODY].id == any(1, 2)`         | Value at JSONPath `$.id` is equal to `1` or `2`     | 1, 2                       | 3, 4, 5          |
 | `[CERTIFICATE_EXPIRATION] > 48h` | Certificate expiration is more than 48h away        | 49h, 50h, 123h             | 1h, 24h, ...     |
+| `[DOMAIN_EXPIRATION] > 720h`     | The domain must expire in more than 720h            | 4000h                      | 1h, 24h, ...     |
 
 
 #### Placeholders
-| Placeholder                | Description                                              | Example of resolved value                    |
+| Placeholder                | Description                                                                               | Example of resolved value                    |
-|:---------------------------|:---------------------------------------------------------|:---------------------------------------------|
+|:---------------------------|:------------------------------------------------------------------------------------------|:---------------------------------------------|
-| `[STATUS]`                 | Resolves into the HTTP status of the request             | 404                                          |
+| `[STATUS]`                 | Resolves into the HTTP status of the request                                              | `404`                                        |
-| `[RESPONSE_TIME]`          | Resolves into the response time the request took, in ms  | 10                                           |
+| `[RESPONSE_TIME]`          | Resolves into the response time the request took, in ms                                   | `10`                                         |
-| `[IP]`                     | Resolves into the IP of the target host                  | 192.168.0.232                                |
+| `[IP]`                     | Resolves into the IP of the target host                                                   | `192.168.0.232`                              |
-| `[BODY]`                   | Resolves into the response body. Supports JSONPath.      | `{"name":"john.doe"}`                        |
+| `[BODY]`                   | Resolves into the response body. Supports JSONPath.                                       | `{"name":"john.doe"}`                        |
-| `[CONNECTED]`              | Resolves into whether a connection could be established  | `true`                                       |
+| `[CONNECTED]`              | Resolves into whether a connection could be established                                   | `true`                                       |
-| `[CERTIFICATE_EXPIRATION]` | Resolves into the duration before certificate expiration | `24h`, `48h`, 0 (if not protocol with certs) |
+| `[CERTIFICATE_EXPIRATION]` | Resolves into the duration before certificate expiration (valid units are "s", "m", "h".) | `24h`, `48h`, 0 (if not protocol with certs) |
-| `[DNS_RCODE]`              | Resolves into the DNS status of the response             | NOERROR                                      |
+| `[DOMAIN_EXPIRATION]`      | Resolves into the duration before the domain expires (valid units are "s", "m", "h".)     | `24h`, `48h`, `1234h56m78s`                  |
+| `[DNS_RCODE]`              | Resolves into the DNS status of the response                                              | `NOERROR`                                    |
 
 
 #### Functions
@@ -239,11 +257,12 @@ Here are some examples of conditions you can use:
 
 
 ### Storage
-| Parameter      | Description                                                                    | Default    |
+| Parameter         | Description                                                                                                                                        | Default    |
-|:---------------|:-------------------------------------------------------------------------------|:-----------|
+|:------------------|:---------------------------------------------------------------------------------------------------------------------------------------------------|:-----------|
-| `storage`      | Storage configuration                                                          | `{}`       |
+| `storage`         | Storage configuration                                                                                                                              | `{}`       |
-| `storage.path` | Path to persist the data in. Only supported for types `sqlite` and `postgres`. | `""`       |
+| `storage.path`    | Path to persist the data in. Only supported for types `sqlite` and `postgres`.                                                                     | `""`       |
-| `storage.type` | Type of storage. Valid types: `memory`, `sqlite`, `postgres`.                  | `"memory"` |
+| `storage.type`    | Type of storage. Valid types: `memory`, `sqlite`, `postgres`.                                                                                      | `"memory"` |
+| `storage.caching` | Whether to use write-through caching. Improves loading time for large dashboards. <br />Only supported if `storage.type` is `sqlite` or `postgres` | `false`    |
 
 - If `storage.type` is `memory` (default):
 ```yaml
@@ -273,11 +292,17 @@ See [examples/docker-compose-postgres-storage](.examples/docker-compose-postgres
 In order to support a wide range of environments, each monitored endpoint has a unique configuration for
 the client used to send the request.
 
-| Parameter                | Description                                                             | Default |
+| Parameter                     | Description                                                                | Default         |
-|:-------------------------|:------------------------------------------------------------------------|:--------|
+|:------------------------------|:---------------------------------------------------------------------------|:----------------|
-| `client.insecure`        | Whether to skip verifying the server's certificate chain and host name. | `false` |
+| `client.insecure`             | Whether to skip verifying the server's certificate chain and host name.    | `false`         |
-| `client.ignore-redirect` | Whether to ignore redirects (true) or follow them (false, default).     | `false` |
+| `client.ignore-redirect`      | Whether to ignore redirects (true) or follow them (false, default).        | `false`         |
-| `client.timeout`         | Duration before timing out.                                             | `10s`   |
+| `client.timeout`              | Duration before timing out.                                                | `10s`           |
+| `client.dns-resolver`         | Override the DNS resolver using the format `{proto}://{host}:{port}`.      | `""`            |
+| `client.oauth2`               | OAuth2 client configuration.                                               | `{}`            |
+| `client.oauth2.token-url`     | The token endpoint URL                                                     | required `""`   |
+| `client.oauth2.client-id`     | The client id which should be used for the `Client credentials flow`       | required `""`   |
+| `client.oauth2.client-secret` | The client secret which should be used for the `Client credentials flow`   | required `""`   |
+| `client.oauth2.scopes[]`      | A list of `scopes` which should be used for the `Client credentials flow`. | required `[""]` |
 
 Note that some of these parameters are ignored based on the type of endpoint. For instance, there's no certificate involved
 in ICMP requests (ping), therefore, setting `client.insecure` to `true` for an endpoint of that type will not do anything.
@@ -304,6 +329,32 @@ endpoints:
       - "[STATUS] == 200"
 ```
 
+This example shows how you can specify a custom DNS resolver:
+```yaml
+endpoints:
+  - name: with-custom-dns-resolver
+    url: "https://your.health.api/health"
+    client:
+      dns-resolver: "tcp://1.1.1.1:53"
+    conditions:
+      - "[STATUS] == 200"
+```
+
+This example shows how you can use the `client.oauth2` configuration to query a backend API with `Bearer token`:
+```yaml
+endpoints:
+  - name: with-custom-oauth2
+    url: "https://your.health.api/health"
+    client:
+      oauth2:
+        token-url: https://your-token-server/token
+        client-id: 00000000-0000-0000-0000-000000000000
+        client-secret: your-client-secret
+        scopes: ['https://your.health.api/.default']
+    conditions:
+      - "[STATUS] == 200"
+```
+
 
 ### Alerting
 Gatus supports multiple alerting providers, such as Slack and PagerDuty, and supports different alerts for each
@@ -317,8 +368,10 @@ ignored.
 | `alerting.discord`     | Configuration for alerts of type `discord`. <br />See [Configuring Discord alerts](#configuring-discord-alerts).             | `{}`    |
 | `alerting.email`       | Configuration for alerts of type `email`. <br />See [Configuring Email alerts](#configuring-email-alerts).                   | `{}`    |
 | `alerting.googlechat`  | Configuration for alerts of type `googlechat`. <br />See [Configuring Google Chat alerts](#configuring-google-chat-alerts).  | `{}`    |
+| `alerting.matrix`      | Configuration for alerts of type `matrix`. <br />See [Configuring Matrix alerts](#configuring-matrix-alerts).                | `{}`    |
 | `alerting.mattermost`  | Configuration for alerts of type `mattermost`. <br />See [Configuring Mattermost alerts](#configuring-mattermost-alerts).    | `{}`    |
 | `alerting.messagebird` | Configuration for alerts of type `messagebird`. <br />See [Configuring Messagebird alerts](#configuring-messagebird-alerts). | `{}`    |
+| `alerting.ntfy`        | Configuration for alerts of type `ntfy`. <br />See [Configuring Ntfy alerts](#configuring-ntfy-alerts).                      | `{}`    |
 | `alerting.opsgenie`    | Configuration for alerts of type `opsgenie`. <br />See [Configuring Opsgenie alerts](#configuring-opsgenie-alerts).          | `{}`    |
 | `alerting.pagerduty`   | Configuration for alerts of type `pagerduty`. <br />See [Configuring PagerDuty alerts](#configuring-pagerduty-alerts).       | `{}`    |
 | `alerting.slack`       | Configuration for alerts of type `slack`. <br />See [Configuring Slack alerts](#configuring-slack-alerts).                   | `{}`    |
@@ -329,11 +382,15 @@ ignored.
 
 
 #### Configuring Discord alerts
-| Parameter                        | Description                                                                                | Default       |
+
-|:---------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
+| Parameter                                  | Description                                                                                | Default       |
-| `alerting.discord`               | Configuration for alerts of type `discord`                                                 | `{}`          |
+|:-------------------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
-| `alerting.discord.webhook-url`   | Discord Webhook URL                                                                        | Required `""` |
+| `alerting.discord`                         | Configuration for alerts of type `discord`                                                 | `{}`          |
-| `alerting.discord.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
+| `alerting.discord.webhook-url`             | Discord Webhook URL                                                                        | Required `""` |
+| `alerting.discord.default-alert`           | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
+| `alerting.discord.overrides`               | List of overrides that may be prioritized over the default configuration                   | `[]`          |
+| `alerting.discord.overrides[].group`       | Endpoint group for which the configuration will be overridden by this configuration        | `""`          |
+| `alerting.discord.overrides[].webhook-url` | Discord Webhook URL                                                                        | `""`          |
 
 ```yaml
 alerting:
@@ -343,7 +400,7 @@ alerting:
 endpoints:
   - name: website
     url: "https://twin.sh/health"
-    interval: 30s
+    interval: 5m
     conditions:
       - "[STATUS] == 200"
       - "[BODY].status == UP"
@@ -357,16 +414,20 @@ endpoints:
 
 
 #### Configuring Email alerts
-| Parameter                      | Description                                                                                | Default               |
+
-|:-------------------------------|:-------------------------------------------------------------------------------------------|:----------------------|
+| Parameter                          | Description                                                                                | Default       |
-| `alerting.email`               | Configuration for alerts of type `email`                                                   | `{}`                  |
+|:-----------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
-| `alerting.email.from`          | Email used to send the alert                                                               | Required `""`         |
+| `alerting.email`                   | Configuration for alerts of type `email`                                                   | `{}`          |
-| `alerting.email.username`      | Username of the SMTP server used to send the alert. If empty, uses `alerting.email.from`.  | `""`                  |
+| `alerting.email.from`              | Email used to send the alert                                                               | Required `""` |
-| `alerting.email.password`      | Password of the SMTP server used to send the alert                                         | Required `""`         |
+| `alerting.email.username`          | Username of the SMTP server used to send the alert. If empty, uses `alerting.email.from`.  | `""`          |
-| `alerting.email.host`          | Host of the mail server (e.g. `smtp.gmail.com`)                                            | Required `""`         |
+| `alerting.email.password`          | Password of the SMTP server used to send the alert                                         | Required `""` |
-| `alerting.email.port`          | Port the mail server is listening to (e.g. `587`)                                          | Required `0`          |
+| `alerting.email.host`              | Host of the mail server (e.g. `smtp.gmail.com`)                                            | Required `""` |
-| `alerting.email.to`            | Email(s) to send the alerts to                                                             | Required `""`         |
+| `alerting.email.port`              | Port the mail server is listening to (e.g. `587`)                                          | Required `0`  |
-| `alerting.email.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A                   |
+| `alerting.email.to`                | Email(s) to send the alerts to                                                             | Required `""` |
+| `alerting.email.default-alert`     | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
+| `alerting.email.overrides`         | List of overrides that may be prioritized over the default configuration                   | `[]`          |
+| `alerting.email.overrides[].group` | Endpoint group for which the configuration will be overridden by this configuration        | `""`          |
+| `alerting.email.overrides[].to`    | Email(s) to send the alerts to                                                             | `""`          |
 
 ```yaml
 alerting:
@@ -377,6 +438,11 @@ alerting:
     host: "mail.example.com"
     port: 587
     to: "recipient1@example.com,recipient2@example.com"
+    # You can also add group-specific to keys, which will
+    # override the to key above for the specified groups
+    overrides:
+      - group: "core"
+        to: "recipient3@example.com,recipient4@example.com"
 
 endpoints:
   - name: website
@@ -391,27 +457,45 @@ endpoints:
         enabled: true
         description: "healthcheck failed"
         send-on-resolved: true
+
+  - name: back-end
+    group: core
+    url: "https://example.org/"
+    interval: 5m
+    conditions:
+      - "[STATUS] == 200"
+      - "[CERTIFICATE_EXPIRATION] > 48h"
+    alerts:
+      - type: email
+        enabled: true
+        description: "healthcheck failed"
+        send-on-resolved: true
 ```
 
 **NOTE:** Some mail servers are painfully slow.
 
+
 #### Configuring Google Chat alerts
-| Parameter                           | Description                                                                                 | Default       |
+
-|:------------------------------------|:--------------------------------------------------------------------------------------------|:--------------|
+| Parameter                                     | Description                                                                                 | Default       |
-| `alerting.googlechat`               | Configuration for alerts of type `googlechat`                                               | `{}`          |
+|:----------------------------------------------|:--------------------------------------------------------------------------------------------|:--------------|
-| `alerting.googlechat.webhook-url`   | Google Chat Webhook URL                                                                     | Required `""` |
+| `alerting.googlechat`                         | Configuration for alerts of type `googlechat`                                               | `{}`          |
-| `alerting.googlechat.client`        | Client configuration. <br />See [Client configuration](#client-configuration).              | `{}`          |
+| `alerting.googlechat.webhook-url`             | Google Chat Webhook URL                                                                     | Required `""` |
-| `alerting.googlechat.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert). | N/A           |
+| `alerting.googlechat.client`                  | Client configuration. <br />See [Client configuration](#client-configuration).              | `{}`          |
+| `alerting.googlechat.default-alert`           | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert). | N/A           |
+| `alerting.googlechat.overrides`               | List of overrides that may be prioritized over the default configuration                    | `[]`          |
+| `alerting.googlechat.overrides[].group`       | Endpoint group for which the configuration will be overridden by this configuration         | `""`          |
+| `alerting.googlechat.overrides[].webhook-url` | Teams Webhook URL                                                                           | `""`          |
 
 ```yaml
 alerting:
-  mattermost: 
+  googlechat:
     webhook-url: "https://chat.googleapis.com/v1/spaces/*******/messages?key=**********&token=********"
 
 endpoints:
   - name: website
     url: "https://twin.sh/health"
-    interval: 30s
+    interval: 5m
     conditions:
       - "[STATUS] == 200"
       - "[BODY].status == UP"
@@ -423,17 +507,49 @@ endpoints:
         send-on-resolved: true
 ```
 
-Here's an example of what the notifications look like:
 
-![Google chat notifications](.github/assets/googlechat-alerts.png)
+#### Configuring Matrix alerts
+| Parameter                                | Description                                                                                | Default                            |
+|:-----------------------------------------|:-------------------------------------------------------------------------------------------|:-----------------------------------|
+| `alerting.matrix`                        | Configuration for alerts of type `matrix`                                                  | `{}`                               |
+| `alerting.matrix.server-url`             | Homeserver URL                                                                             | `https://matrix-client.matrix.org` |
+| `alerting.matrix.access-token`           | Bot user access token (see https://webapps.stackexchange.com/q/131056)                     | Required `""`                      |
+| `alerting.matrix.internal-room-id`       | Internal room ID of room to send alerts to (can be found in Room Settings > Advanced)      | Required `""`                      |
+| `alerting.matrix.default-alert`          | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A                                |
+
+```yaml
+alerting:
+  matrix:
+    server-url: "https://matrix-client.matrix.org"
+    access-token: "123456"
+    internal-room-id: "!example:matrix.org"
+
+endpoints:
+  - name: website
+    interval: 5m
+    url: "https://twin.sh/health"
+    conditions:
+      - "[STATUS] == 200"
+      - "[BODY].status == UP"
+      - "[RESPONSE_TIME] < 300"
+    alerts:
+      - type: matrix
+        enabled: true
+        send-on-resolved: true
+        description: "healthcheck failed"
+```
+
 
 #### Configuring Mattermost alerts
-| Parameter                           | Description                                                                                 | Default       |
+| Parameter                                     | Description                                                                                 | Default       |
-|:------------------------------------|:--------------------------------------------------------------------------------------------|:--------------|
+|:----------------------------------------------|:--------------------------------------------------------------------------------------------|:--------------|
-| `alerting.mattermost`               | Configuration for alerts of type `mattermost`                                               | `{}`          |
+| `alerting.mattermost`                         | Configuration for alerts of type `mattermost`                                               | `{}`          |
-| `alerting.mattermost.webhook-url`   | Mattermost Webhook URL                                                                      | Required `""` |
+| `alerting.mattermost.webhook-url`             | Mattermost Webhook URL                                                                      | Required `""` |
-| `alerting.mattermost.client`        | Client configuration. <br />See [Client configuration](#client-configuration).              | `{}`          |
+| `alerting.mattermost.client`                  | Client configuration. <br />See [Client configuration](#client-configuration).              | `{}`          |
-| `alerting.mattermost.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert). | N/A           |
+| `alerting.mattermost.default-alert`           | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert). | N/A           |
+| `alerting.mattermost.overrides`               | List of overrides that may be prioritized over the default configuration                    | `[]`          |
+| `alerting.mattermost.overrides[].group`       | Endpoint group for which the configuration will be overridden by this configuration         | `""`          |
+| `alerting.mattermist.overrides[].webhook-url` | Mattermost Webhook URL                                                                      | `""`          |
 
 ```yaml
 alerting:
@@ -445,7 +561,7 @@ alerting:
 endpoints:
   - name: website
     url: "https://twin.sh/health"
-    interval: 30s
+    interval: 5m
     conditions:
       - "[STATUS] == 200"
       - "[BODY].status == UP"
@@ -461,10 +577,11 @@ Here's an example of what the notifications look like:
 
 ![Mattermost notifications](.github/assets/mattermost-alerts.png)
 
+
 #### Configuring Messagebird alerts
 | Parameter                            | Description                                                                                | Default       |
 |:-------------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
-| `alerting.messagebird`               | Settings for alerts of type `messagebird`                                                  | `{}`          |
+| `alerting.messagebird`               | Configuration for alerts of type `messagebird`                                             | `{}`          |
 | `alerting.messagebird.access-key`    | Messagebird access key                                                                     | Required `""` |
 | `alerting.messagebird.originator`    | The sender of the message                                                                  | Required `""` |
 | `alerting.messagebird.recipients`    | The recipients of the message                                                              | Required `""` |
@@ -480,7 +597,7 @@ alerting:
 
 endpoints:
   - name: website
-    interval: 30s
+    interval: 5m
     url: "https://twin.sh/health"
     conditions:
       - "[STATUS] == 200"
@@ -495,6 +612,42 @@ endpoints:
 ```
 
 
+#### Configuring Ntfy alerts
+| Parameter                     | Description                                                                                | Default           |
+|:------------------------------|:-------------------------------------------------------------------------------------------|:------------------|
+| `alerting.ntfy`               | Configuration for alerts of type `ntfy`                                                    | `{}`              |
+| `alerting.ntfy.topic`         | Topic at which the alert will be sent                                                      | Required `""`     |
+| `alerting.ntfy.url`           | The URL of the target server                                                               | `https://ntfy.sh` |
+| `alerting.ntfy.priority`      | The priority of the alert                                                                  | `3`               |
+| `alerting.ntfy.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A               |
+
+[ntfy](https://github.com/binwiederhier/ntfy) is an amazing project that allows you to subscribe to desktop
+and mobile notifications, making it an awesome addition to Gatus.
+
+Example:
+```yaml
+alerting:
+  ntfy:
+    topic: "gatus-test-topic"
+    priority: 2
+    default-alert:
+      enabled: true
+      failure-threshold: 3
+      send-on-resolved: true
+
+endpoints:
+  - name: website
+    interval: 5m
+    url: "https://twin.sh/health"
+    conditions:
+      - "[STATUS] == 200"
+      - "[BODY].status == UP"
+      - "[RESPONSE_TIME] < 300"
+    alerts:
+      - type: ntfy
+```
+
+
 #### Configuring Opsgenie alerts
 | Parameter                         | Description                                                                                | Default              |
 |:----------------------------------|:-------------------------------------------------------------------------------------------|:---------------------|
@@ -542,8 +695,8 @@ alerting:
     # You can also add group-specific integration keys, which will
     # override the integration key above for the specified groups
     overrides:
-     - group: "core"
+      - group: "core"
-       integration-key: "********************************"
+        integration-key: "********************************"
 
 endpoints:
   - name: website
@@ -579,12 +732,14 @@ endpoints:
 
 
 #### Configuring Slack alerts
-| Parameter                      | Description                                                                                | Default       |
+| Parameter                                 | Description                                                                                | Default       |
-|:-------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
+|:------------------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
-| `alerting.slack`               | Configuration for alerts of type `slack`                                                   | `{}`          |
+| `alerting.slack`                          | Configuration for alerts of type `slack`                                                   | `{}`          |
-| `alerting.slack.webhook-url`   | Slack Webhook URL                                                                          | Required `""` |
+| `alerting.slack.webhook-url`              | Slack Webhook URL                                                                          | Required `""` |
-| `alerting.slack.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
+| `alerting.slack.default-alert`            | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
-
+| `alerting.slack.overrides`                | List of overrides that may be prioritized over the default configuration                   | `[]`          |
+| `alerting.slack.overrides[].group`        | Endpoint group for which the configuration will be overridden by this configuration        | `""`          |
+| `alerting.slack.overrides[].webhook-url`  | Slack Webhook URL                                                                          | `""`          |
 ```yaml
 alerting:
   slack:
@@ -616,16 +771,25 @@ Here's an example of what the notifications look like:
 
 
 #### Configuring Teams alerts
-| Parameter                      | Description                                                                                | Default       |
+
-|:-------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
+| Parameter                                | Description                                                                                | Default       |
-| `alerting.teams`               | Configuration for alerts of type `teams`                                                   | `{}`          |
+|:-----------------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
-| `alerting.teams.webhook-url`   | Teams Webhook URL                                                                          | Required `""` |
+| `alerting.teams`                         | Configuration for alerts of type `teams`                                                   | `{}`          |
-| `alerting.teams.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
+| `alerting.teams.webhook-url`             | Teams Webhook URL                                                                          | Required `""` |
+| `alerting.teams.default-alert`           | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
+| `alerting.teams.overrides`               | List of overrides that may be prioritized over the default configuration                   | `[]`          |
+| `alerting.teams.overrides[].group`       | Endpoint group for which the configuration will be overridden by this configuration        | `""`          |
+| `alerting.teams.overrides[].webhook-url` | Teams Webhook URL                                                                          | `""`          |
 
 ```yaml
 alerting:
   teams:
     webhook-url: "https://********.webhook.office.com/webhookb2/************"
+    # You can also add group-specific to keys, which will
+    # override the to key above for the specified groups
+    overrides:
+      - group: "core"
+        webhook-url: "https://********.webhook.office.com/webhookb3/************"
 
 endpoints:
   - name: website
@@ -640,19 +804,35 @@ endpoints:
         enabled: true
         description: "healthcheck failed"
         send-on-resolved: true
+
+  - name: back-end
+    group: core
+    url: "https://example.org/"
+    interval: 5m
+    conditions:
+      - "[STATUS] == 200"
+      - "[CERTIFICATE_EXPIRATION] > 48h"
+    alerts:
+      - type: teams
+        enabled: true
+        description: "healthcheck failed"
+        send-on-resolved: true
 ```
 
 Here's an example of what the notifications look like:
 
 ![Teams notifications](.github/assets/teams-alerts.png)
 
+
 #### Configuring Telegram alerts
-| Parameter                         | Description                                                                                | Default       |
+| Parameter                         | Description                                                                                | Default                    |
-|:----------------------------------|:-------------------------------------------------------------------------------------------|:--------------|
+|:----------------------------------|:-------------------------------------------------------------------------------------------|:---------------------------|
-| `alerting.telegram`               | Configuration for alerts of type `telegram`                                                | `{}`          |
+| `alerting.telegram`               | Configuration for alerts of type `telegram`                                                | `{}`                       |
-| `alerting.telegram.token`         | Telegram Bot Token                                                                         | Required `""` |
+| `alerting.telegram.token`         | Telegram Bot Token                                                                         | Required `""`              |
-| `alerting.telegram.id`            | Telegram User ID                                                                           | Required `""` |
+| `alerting.telegram.id`            | Telegram User ID                                                                           | Required `""`              |
-| `alerting.telegram.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A           |
+| `alerting.telegram.api-url`       | Telegram API URL                                                                           | `https://api.telegram.org` |
+| `alerting.telegram.client`        | Client configuration. <br />See [Client configuration](#client-configuration).             | `{}`                       |
+| `alerting.telegram.default-alert` | Default alert configuration. <br />See [Setting a default alert](#setting-a-default-alert) | N/A                        |
 
 ```yaml
 alerting:
@@ -731,8 +911,11 @@ leveraging Gatus, you could have Gatus call that application endpoint when an en
 would then check if the endpoint that started failing was part of the recently deployed application, and if it was,
 then automatically roll it back.
 
-The placeholders `[ALERT_DESCRIPTION]` and `[ENDPOINT_NAME]` are automatically substituted for the alert description and
+Furthermore, you may use the following placeholders in the body (`alerting.custom.body`) and in the url (`alerting.custom.url`):
-the endpoint name. These placeholders can be used in the body (`alerting.custom.body`) and in the url (`alerting.custom.url`).
+- `[ALERT_DESCRIPTION]` (resolved from `endpoints[].alerts[].description`)
+- `[ENDPOINT_NAME]` (resolved from `endpoints[].name`)
+- `[ENDPOINT_GROUP]` (resolved from `endpoints[].group`)
+- `[ENDPOINT_URL]` (resolved from `endpoints[].url`)
 
 If you have an alert using the `custom` provider with `send-on-resolved` set to `true`, you can use the
 `[ALERT_TRIGGERED_OR_RESOLVED]` placeholder to differentiate the notifications.
@@ -747,7 +930,7 @@ alerting:
     method: "POST"
     body: |
       {
-        "text": "[ALERT_TRIGGERED_OR_RESOLVED]: [ENDPOINT_NAME] - [ALERT_DESCRIPTION]"
+        "text": "[ALERT_TRIGGERED_OR_RESOLVED]: [ENDPOINT_GROUP] - [ENDPOINT_NAME] - [ALERT_DESCRIPTION]"
       }
 endpoints:
   - name: website
@@ -870,6 +1053,7 @@ endpoints:
       - type: pagerduty
 ```
 
+
 ### Maintenance
 If you have maintenance windows, you may not want to be annoyed by alerts.
 To do that, you'll have to use the maintenance configuration:
@@ -908,6 +1092,7 @@ maintenance:
 | `security.basic`                 | HTTP Basic configuration     | `{}`          |
 | `security.oidc`                  | OpenID Connect configuration | `{}`          |
 
+
 #### Basic
 | Parameter                               | Description                                                                        | Default       |
 |:----------------------------------------|:-----------------------------------------------------------------------------------|:--------------|
@@ -926,7 +1111,8 @@ security:
 **WARNING:** Make sure to carefully select to cost of the bcrypt hash. The higher the cost, the longer it takes to compute the hash,
 and basic auth verifies the password against the hash on every request. As of 2022-01-08, I suggest a cost of 8.
 
-#### OIDC (ALPHA)
+
+#### OIDC
 | Parameter                        | Description                                                    | Default       |
 |:---------------------------------|:---------------------------------------------------------------|:--------------|
 | `security.oidc`                  | OpenID Connect configuration                                   | `{}`          |
@@ -949,7 +1135,48 @@ security:
     #allowed-subjects: ["johndoe@example.com"]
 ```
 
-**NOTE:** The OIDC feature is currently in Alpha. Breaking changes may occur. Use this feature at your own risk.
+Confused? Read [Securing Gatus with OIDC using Auth0](https://twin.sh/articles/56/securing-gatus-with-oidc-using-auth0).
+
+
+### Metrics
+To enable metrics, you must set `metrics` to `true`. Doing so will expose Prometheus-friendly metrics at the `/metrics`
+endpoint on the same port your application is configured to run on (`web.port`).
+
+| Metric name                                  | Type    | Description                                                                | Labels                          | Relevant endpoint types |
+|:---------------------------------------------|:--------|:---------------------------------------------------------------------------|:--------------------------------|:------------------------|
+| gatus_results_total                          | counter | Number of results per endpoint                                             | key, group, name, type, success | All                     |
+| gatus_results_code_total                     | counter | Total number of results by code                                            | key, group, name, type, code    | DNS, HTTP               |
+| gatus_results_connected_total                | counter | Total number of results in which a connection was successfully established | key, group, name, type          | All                     |
+| gatus_results_duration_seconds               | gauge   | Duration of the request in seconds                                         | key, group, name, type          | All                     |
+| gatus_results_certificate_expiration_seconds | gauge   | Number of seconds until the certificate expires                            | key, group, name, type          | HTTP, STARTTLS          |
+
+See [examples/docker-compose-grafana-prometheus](.examples/docker-compose-grafana-prometheus) for further documentation as well as an example.
+
+
+### Remote instances (EXPERIMENTAL)
+This feature allows you to retrieve endpoint statuses from a remote Gatus instance.
+
+There are two main use cases for this:
+- You have multiple Gatus instances running on different machines, and you wish to visually expose the statuses through a single dashboard
+- You have one or more Gatus instances that are not publicly accessible (e.g. behind a firewall), and you wish to retrieve 
+
+This is an experimental feature. It may be removed or updated in a breaking manner at any time. Furthermore,
+there are known issues with this feature. If you'd like to provide some feedback, please write a comment in [#64](https://github.com/TwiN/gatus/issues/64).
+Use at your own risk.
+
+| Parameter                          | Description                                  | Default        |
+|:-----------------------------------|:---------------------------------------------|:---------------|
+| `remote`                           | Remote configuration                         | `{}`           |
+| `remote.instances`                 | List of remote instances                     | Required `[]`  |
+| `remote.instances.endpoint-prefix` | String to prefix all endpoint names with     | `""`           |
+| `remote.instances.url`             | URL from which to retrieve endpoint statuses | Required `""`  |
+
+```yaml
+remote:
+  instances:
+    - endpoint-prefix: "status.example.org-"
+      url: "https://status.example.org/api/v1/endpoints/statuses"
+```
 
 
 ## Deployment
@@ -998,7 +1225,6 @@ and [helmfile example](https://github.com/avakarev/gatus-chart#helmfileyaml-exam
 Gatus can be deployed on Terraform by using the following module: [terraform-kubernetes-gatus](https://github.com/TwiN/terraform-kubernetes-gatus).
 
 
-
 ## Running the tests
 ```console
 go test ./... -mod vendor
@@ -1071,11 +1297,11 @@ simple health checks used for alerting (PagerDuty/Twilio) to `30s`.
 
 
 ### Default timeouts
-| Endpoint type | Timeout |
+| Endpoint type  | Timeout |
-|:------------- |:------- |
+|:---------------|:--------|
-| HTTP          | 10s
+| HTTP           | 10s     |
-| TCP           | 10s
+| TCP            | 10s     |
-| ICMP          | 10s
+| ICMP           | 10s     |
 
 To modify the timeout, see [Client configuration](#client-configuration).
 
@@ -1095,6 +1321,8 @@ endpoints:
 Placeholders `[STATUS]` and `[BODY]` as well as the fields `endpoints[].body`, `endpoints[].headers`,
 `endpoints[].method` and `endpoints[].graphql` are not supported for TCP endpoints.
 
+This works for applications such as databases (Postgres, MySQL, etc.) and caches (Redis, Memcached, etc.).
+
 **NOTE**: `[CONNECTED] == true` does not guarantee that the endpoint itself is healthy - it only guarantees that there's
 something at the given address listening to the given port, and that a connection to that address was successfully
 established.
@@ -1168,6 +1396,25 @@ endpoints:
 ```
 
 
+### Monitoring domain expiration
+You can monitor the expiration of a domain with all endpoint types except for DNS by using the `[DOMAIN_EXPIRATION]`
+placeholder:
+```yaml
+endpoints:
+  - name: check-domain-and-certificate-expiration
+    url: "https://example.org"
+    interval: 1h
+    conditions:
+      - "[DOMAIN_EXPIRATION] > 720h"
+      - "[CERTIFICATE_EXPIRATION] > 240h"
+```
+
+**NOTE**: The usage of the `[DOMAIN_EXPIRATION]` placeholder requires Gatus to send a request to the official IANA WHOIS service [through a library](https://github.com/TwiN/whois)
+and in some cases, a secondary request to a TLD-specific WHOIS server (e.g. `whois.nic.sh`). 
+To prevent the WHOIS service from throttling your IP address if you send too many requests, Gatus will prevent you from
+using the `[DOMAIN_EXPIRATION]` placeholder on an endpoint with an interval of less than `5m`.
+
+
 ### disable-monitoring-lock
 Setting `disable-monitoring-lock` to `true` means that multiple endpoints could be monitored at the same time.
 
@@ -1239,7 +1486,7 @@ endpoints:
     conditions:
       - "[STATUS] == 200"
 
-  - name: random endpoint that isn't part of a group
+  - name: random endpoint that is not part of a group
     url: "https://example.org/"
     interval: 5m
     conditions:
@@ -1265,8 +1512,9 @@ web:
   port: ${PORT}
 ```
 
+
 ### Badges
-### Uptime
+#### Uptime
 ![Uptime 1h](https://status.twin.sh/api/v1/endpoints/core_blog-external/uptimes/1h/badge.svg)
 ![Uptime 24h](https://status.twin.sh/api/v1/endpoints/core_blog-external/uptimes/24h/badge.svg)
 ![Uptime 7d](https://status.twin.sh/api/v1/endpoints/core_blog-external/uptimes/7d/badge.svg)
@@ -1299,7 +1547,24 @@ Example:
 If you'd like to see a visual example of each badge available, you can simply navigate to the endpoint's detail page.
 
 
-### Response time
+#### Health
+![Health](https://status.twin.sh/api/v1/endpoints/core_blog-external/health/badge.svg)
+
+The path to generate a badge is the following:
+```
+/api/v1/endpoints/{key}/health/badge.svg
+```
+Where:
+- `{key}` has the pattern `<GROUP_NAME>_<ENDPOINT_NAME>` in which both variables have ` `, `/`, `_`, `,` and `.` replaced by `-`.
+
+For instance, if you want the current status of the endpoint `frontend` in the group `core`,
+the URL would look like this:
+```
+https://example.com/api/v1/endpoints/core_frontend/health/badge.svg
+```
+
+
+#### Response time
 ![Response time 1h](https://status.twin.sh/api/v1/endpoints/core_blog-external/response-times/1h/badge.svg)
 ![Response time 24h](https://status.twin.sh/api/v1/endpoints/core_blog-external/response-times/24h/badge.svg)
 ![Response time 7d](https://status.twin.sh/api/v1/endpoints/core_blog-external/response-times/7d/badge.svg)
@@ -1313,6 +1578,26 @@ Where:
 - `{key}` has the pattern `<GROUP_NAME>_<ENDPOINT_NAME>` in which both variables have ` `, `/`, `_`, `,` and `.` replaced by `-`.
 
 
+##### How to change the color thresholds of the response time badge  
+To change the response time badges' threshold, a corresponding configuration can be added to an endpoint.   
+The values in the array correspond to the levels [Awesome, Great, Good, Passable, Bad]  
+All five values must be given in milliseconds (ms).  
+
+```
+endpoints:
+- name: nas
+  group: internal
+  url: "https://example.org/"
+  interval: 5m
+  conditions:
+    - "[STATUS] == 200"
+  ui:
+    badge:
+      response-time:
+        thresholds: [550, 850, 1350, 1650, 1750]
+```
+
+
 ### API
 Gatus provides a simple read-only API that can be queried in order to programmatically determine endpoint status and history.
 

alerting/alert/type.go

@@ -17,12 +17,21 @@ const (
 	// TypeGoogleChat is the Type for the googlechat alerting provider
 	TypeGoogleChat Type = "googlechat"
 
+	// TypeMatrix is the Type for the matrix alerting provider
+	TypeMatrix Type = "matrix"
+
 	// TypeMattermost is the Type for the mattermost alerting provider
 	TypeMattermost Type = "mattermost"
 
 	// TypeMessagebird is the Type for the messagebird alerting provider
 	TypeMessagebird Type = "messagebird"
 
+	// TypeNtfy is the Type for the ntfy alerting provider
+	TypeNtfy Type = "ntfy"
+
+	// TypeOpsgenie is the Type for the opsgenie alerting provider
+	TypeOpsgenie Type = "opsgenie"
+
 	// TypePagerDuty is the Type for the pagerduty alerting provider
 	TypePagerDuty Type = "pagerduty"
 
@@ -37,7 +46,4 @@ const (
 
 	// TypeTwilio is the Type for the twilio alerting provider
 	TypeTwilio Type = "twilio"
-
-	// TypeOpsgenie is the Type for the opsgenie alerting provider
-	TypeOpsgenie Type = "opsgenie"
 )

alerting/config.go

@@ -1,20 +1,22 @@
 package alerting
 
 import (
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/alerting/provider"
+	"github.com/TwiN/gatus/v4/alerting/provider"
-	"github.com/TwiN/gatus/v3/alerting/provider/custom"
+	"github.com/TwiN/gatus/v4/alerting/provider/custom"
-	"github.com/TwiN/gatus/v3/alerting/provider/discord"
+	"github.com/TwiN/gatus/v4/alerting/provider/discord"
-	"github.com/TwiN/gatus/v3/alerting/provider/email"
+	"github.com/TwiN/gatus/v4/alerting/provider/email"
-	"github.com/TwiN/gatus/v3/alerting/provider/googlechat"
+	"github.com/TwiN/gatus/v4/alerting/provider/googlechat"
-	"github.com/TwiN/gatus/v3/alerting/provider/mattermost"
+	"github.com/TwiN/gatus/v4/alerting/provider/matrix"
-	"github.com/TwiN/gatus/v3/alerting/provider/messagebird"
+	"github.com/TwiN/gatus/v4/alerting/provider/mattermost"
-	"github.com/TwiN/gatus/v3/alerting/provider/opsgenie"
+	"github.com/TwiN/gatus/v4/alerting/provider/messagebird"
-	"github.com/TwiN/gatus/v3/alerting/provider/pagerduty"
+	"github.com/TwiN/gatus/v4/alerting/provider/ntfy"
-	"github.com/TwiN/gatus/v3/alerting/provider/slack"
+	"github.com/TwiN/gatus/v4/alerting/provider/opsgenie"
-	"github.com/TwiN/gatus/v3/alerting/provider/teams"
+	"github.com/TwiN/gatus/v4/alerting/provider/pagerduty"
-	"github.com/TwiN/gatus/v3/alerting/provider/telegram"
+	"github.com/TwiN/gatus/v4/alerting/provider/slack"
-	"github.com/TwiN/gatus/v3/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v4/alerting/provider/teams"
+	"github.com/TwiN/gatus/v4/alerting/provider/telegram"
+	"github.com/TwiN/gatus/v4/alerting/provider/twilio"
 )
 
 // Config is the configuration for alerting providers
@@ -31,12 +33,21 @@ type Config struct {
 	// Email is the configuration for the email alerting provider
 	Email *email.AlertProvider `yaml:"email,omitempty"`
 
+	// Matrix is the configuration for the matrix alerting provider
+	Matrix *matrix.AlertProvider `yaml:"matrix,omitempty"`
+
 	// Mattermost is the configuration for the mattermost alerting provider
 	Mattermost *mattermost.AlertProvider `yaml:"mattermost,omitempty"`
 
 	// Messagebird is the configuration for the messagebird alerting provider
 	Messagebird *messagebird.AlertProvider `yaml:"messagebird,omitempty"`
 
+	// Ntfy is the configuration for the ntfy alerting provider
+	Ntfy *ntfy.AlertProvider `yaml:"ntfy,omitempty"`
+
+	// Opsgenie is the configuration for the opsgenie alerting provider
+	Opsgenie *opsgenie.AlertProvider `yaml:"opsgenie,omitempty"`
+
 	// PagerDuty is the configuration for the pagerduty alerting provider
 	PagerDuty *pagerduty.AlertProvider `yaml:"pagerduty,omitempty"`
 
@@ -51,9 +62,6 @@ type Config struct {
 
 	// Twilio is the configuration for the twilio alerting provider
 	Twilio *twilio.AlertProvider `yaml:"twilio,omitempty"`
-
-	// Opsgenie is the configuration for the opsgenie alerting provider
-	Opsgenie *opsgenie.AlertProvider `yaml:"opsgenie,omitempty"`
 }
 
 // GetAlertingProviderByAlertType returns an provider.AlertProvider by its corresponding alert.Type
@@ -65,12 +73,6 @@ func (config Config) GetAlertingProviderByAlertType(alertType alert.Type) provid
 			return nil
 		}
 		return config.Custom
-	case alert.TypeGoogleChat:
-		if config.GoogleChat == nil {
-			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil
-			return nil
-		}
-		return config.GoogleChat
 	case alert.TypeDiscord:
 		if config.Discord == nil {
 			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil
@@ -83,6 +85,18 @@ func (config Config) GetAlertingProviderByAlertType(alertType alert.Type) provid
 			return nil
 		}
 		return config.Email
+	case alert.TypeGoogleChat:
+		if config.GoogleChat == nil {
+			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil
+			return nil
+		}
+		return config.GoogleChat
+	case alert.TypeMatrix:
+		if config.Matrix == nil {
+			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil
+			return nil
+		}
+		return config.Matrix
 	case alert.TypeMattermost:
 		if config.Mattermost == nil {
 			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil
@@ -95,6 +109,12 @@ func (config Config) GetAlertingProviderByAlertType(alertType alert.Type) provid
 			return nil
 		}
 		return config.Messagebird
+	case alert.TypeNtfy:
+		if config.Ntfy == nil {
+			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil
+			return nil
+		}
+		return config.Ntfy
 	case alert.TypeOpsgenie:
 		if config.Opsgenie == nil {
 			// Since we're returning an interface, we need to explicitly return nil, even if the provider itself is nil

alerting/provider/custom/custom.go

@@ -7,9 +7,9 @@ import (
 	"net/http"
 	"strings"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using a custom HTTP request
@@ -50,48 +50,28 @@ func (provider *AlertProvider) GetAlertStatePlaceholderValue(resolved bool) stri
 	return status
 }
 
-func (provider *AlertProvider) buildHTTPRequest(endpointName, alertDescription string, resolved bool) *http.Request {
+func (provider *AlertProvider) buildHTTPRequest(endpoint *core.Endpoint, alert *alert.Alert, resolved bool) *http.Request {
-	body := provider.Body
+	body, url, method := provider.Body, provider.URL, provider.Method
-	providerURL := provider.URL
+	body = strings.ReplaceAll(body, "[ALERT_DESCRIPTION]", alert.GetDescription())
-	method := provider.Method
+	url = strings.ReplaceAll(url, "[ALERT_DESCRIPTION]", alert.GetDescription())
-
+	body = strings.ReplaceAll(body, "[ENDPOINT_NAME]", endpoint.Name)
-	if strings.Contains(body, "[ALERT_DESCRIPTION]") {
+	url = strings.ReplaceAll(url, "[ENDPOINT_NAME]", endpoint.Name)
-		body = strings.ReplaceAll(body, "[ALERT_DESCRIPTION]", alertDescription)
+	body = strings.ReplaceAll(body, "[ENDPOINT_GROUP]", endpoint.Group)
-	}
+	url = strings.ReplaceAll(url, "[ENDPOINT_GROUP]", endpoint.Group)
-	if strings.Contains(body, "[SERVICE_NAME]") { // XXX: Remove this in v4.0.0
+	body = strings.ReplaceAll(body, "[ENDPOINT_URL]", endpoint.URL)
-		body = strings.ReplaceAll(body, "[SERVICE_NAME]", endpointName)
+	url = strings.ReplaceAll(url, "[ENDPOINT_URL]", endpoint.URL)
-	}
+	if resolved {
-	if strings.Contains(body, "[ENDPOINT_NAME]") {
+		body = strings.ReplaceAll(body, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(true))
-		body = strings.ReplaceAll(body, "[ENDPOINT_NAME]", endpointName)
+		url = strings.ReplaceAll(url, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(true))
-	}
+	} else {
-	if strings.Contains(body, "[ALERT_TRIGGERED_OR_RESOLVED]") {
+		body = strings.ReplaceAll(body, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(false))
-		if resolved {
+		url = strings.ReplaceAll(url, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(false))
-			body = strings.ReplaceAll(body, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(true))
-		} else {
-			body = strings.ReplaceAll(body, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(false))
-		}
-	}
-	if strings.Contains(providerURL, "[ALERT_DESCRIPTION]") {
-		providerURL = strings.ReplaceAll(providerURL, "[ALERT_DESCRIPTION]", alertDescription)
-	}
-	if strings.Contains(providerURL, "[SERVICE_NAME]") { // XXX: Remove this in v4.0.0
-		providerURL = strings.ReplaceAll(providerURL, "[SERVICE_NAME]", endpointName)
-	}
-	if strings.Contains(providerURL, "[ENDPOINT_NAME]") {
-		providerURL = strings.ReplaceAll(providerURL, "[ENDPOINT_NAME]", endpointName)
-	}
-	if strings.Contains(providerURL, "[ALERT_TRIGGERED_OR_RESOLVED]") {
-		if resolved {
-			providerURL = strings.ReplaceAll(providerURL, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(true))
-		} else {
-			providerURL = strings.ReplaceAll(providerURL, "[ALERT_TRIGGERED_OR_RESOLVED]", provider.GetAlertStatePlaceholderValue(false))
-		}
 	}
 	if len(method) == 0 {
 		method = http.MethodGet
 	}
 	bodyBuffer := bytes.NewBuffer([]byte(body))
-	request, _ := http.NewRequest(method, providerURL, bodyBuffer)
+	request, _ := http.NewRequest(method, url, bodyBuffer)
 	for k, v := range provider.Headers {
 		request.Header.Set(k, v)
 	}
@@ -99,7 +79,7 @@ func (provider *AlertProvider) buildHTTPRequest(endpointName, alertDescription s
 }
 
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
-	request := provider.buildHTTPRequest(endpoint.Name, alert.GetDescription(), resolved)
+	request := provider.buildHTTPRequest(endpoint, alert, resolved)
 	response, err := client.GetHTTPClient(provider.ClientConfig).Do(request)
 	if err != nil {
 		return err

alerting/provider/custom/custom_test.go

@@ -1,25 +1,36 @@
 package custom
 
 import (
+	"fmt"
 	"io"
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {
-	invalidProvider := AlertProvider{URL: ""}
+	t.Run("invalid-provider", func(t *testing.T) {
-	if invalidProvider.IsValid() {
+		invalidProvider := AlertProvider{URL: ""}
-		t.Error("provider shouldn't have been valid")
+		if invalidProvider.IsValid() {
-	}
+			t.Error("provider shouldn't have been valid")
-	validProvider := AlertProvider{URL: "https://example.com"}
+		}
-	if !validProvider.IsValid() {
+	})
-		t.Error("provider should've been valid")
+	t.Run("valid-provider", func(t *testing.T) {
-	}
+		validProvider := AlertProvider{URL: "https://example.com"}
+		if validProvider.ClientConfig != nil {
+			t.Error("provider client config should have been nil prior to IsValid() being executed")
+		}
+		if !validProvider.IsValid() {
+			t.Error("provider should've been valid")
+		}
+		if validProvider.ClientConfig == nil {
+			t.Error("provider client config should have been set after IsValid() was executed")
+		}
+	})
 }
 
 func TestAlertProvider_Send(t *testing.T) {
@@ -99,77 +110,103 @@ func TestAlertProvider_Send(t *testing.T) {
 	}
 }
 
-func TestAlertProvider_buildHTTPRequestWhenResolved(t *testing.T) {
+func TestAlertProvider_buildHTTPRequest(t *testing.T) {
-	const (
-		ExpectedURL  = "https://example.com/endpoint-name?event=RESOLVED&description=alert-description"
-		ExpectedBody = "endpoint-name,alert-description,RESOLVED"
-	)
 	customAlertProvider := &AlertProvider{
-		URL:     "https://example.com/[ENDPOINT_NAME]?event=[ALERT_TRIGGERED_OR_RESOLVED]&description=[ALERT_DESCRIPTION]",
+		URL:  "https://example.com/[ENDPOINT_GROUP]/[ENDPOINT_NAME]?event=[ALERT_TRIGGERED_OR_RESOLVED]&description=[ALERT_DESCRIPTION]&url=[ENDPOINT_URL]",
-		Body:    "[ENDPOINT_NAME],[ALERT_DESCRIPTION],[ALERT_TRIGGERED_OR_RESOLVED]",
+		Body: "[ENDPOINT_NAME],[ENDPOINT_GROUP],[ALERT_DESCRIPTION],[ENDPOINT_URL],[ALERT_TRIGGERED_OR_RESOLVED]",
-		Headers: nil,
 	}
-	request := customAlertProvider.buildHTTPRequest("endpoint-name", "alert-description", true)
+	alertDescription := "alert-description"
-	if request.URL.String() != ExpectedURL {
+	scenarios := []struct {
-		t.Error("expected URL to be", ExpectedURL, "was", request.URL.String())
+		AlertProvider *AlertProvider
+		Resolved      bool
+		ExpectedURL   string
+		ExpectedBody  string
+	}{
+		{
+			AlertProvider: customAlertProvider,
+			Resolved:      true,
+			ExpectedURL:   "https://example.com/endpoint-group/endpoint-name?event=RESOLVED&description=alert-description&url=https://example.com",
+			ExpectedBody:  "endpoint-name,endpoint-group,alert-description,https://example.com,RESOLVED",
+		},
+		{
+			AlertProvider: customAlertProvider,
+			Resolved:      false,
+			ExpectedURL:   "https://example.com/endpoint-group/endpoint-name?event=TRIGGERED&description=alert-description&url=https://example.com",
+			ExpectedBody:  "endpoint-name,endpoint-group,alert-description,https://example.com,TRIGGERED",
+		},
 	}
-	body, _ := io.ReadAll(request.Body)
+	for _, scenario := range scenarios {
-	if string(body) != ExpectedBody {
+		t.Run(fmt.Sprintf("resolved-%v-with-default-placeholders", scenario.Resolved), func(t *testing.T) {
-		t.Error("expected body to be", ExpectedBody, "was", string(body))
+			request := customAlertProvider.buildHTTPRequest(
-	}
+				&core.Endpoint{Name: "endpoint-name", Group: "endpoint-group", URL: "https://example.com"},
-}
+				&alert.Alert{Description: &alertDescription},
-
+				scenario.Resolved,
-func TestAlertProvider_buildHTTPRequestWhenTriggered(t *testing.T) {
+			)
-	const (
+			if request.URL.String() != scenario.ExpectedURL {
-		ExpectedURL  = "https://example.com/endpoint-name?event=TRIGGERED&description=alert-description"
+				t.Error("expected URL to be", scenario.ExpectedURL, "got", request.URL.String())
-		ExpectedBody = "endpoint-name,alert-description,TRIGGERED"
+			}
-	)
+			body, _ := io.ReadAll(request.Body)
-	customAlertProvider := &AlertProvider{
+			if string(body) != scenario.ExpectedBody {
-		URL:     "https://example.com/[ENDPOINT_NAME]?event=[ALERT_TRIGGERED_OR_RESOLVED]&description=[ALERT_DESCRIPTION]",
+				t.Error("expected body to be", scenario.ExpectedBody, "got", string(body))
-		Body:    "[ENDPOINT_NAME],[ALERT_DESCRIPTION],[ALERT_TRIGGERED_OR_RESOLVED]",
+			}
-		Headers: map[string]string{"Authorization": "Basic hunter2"},
+		})
-	}
-	request := customAlertProvider.buildHTTPRequest("endpoint-name", "alert-description", false)
-	if request.URL.String() != ExpectedURL {
-		t.Error("expected URL to be", ExpectedURL, "was", request.URL.String())
-	}
-	body, _ := io.ReadAll(request.Body)
-	if string(body) != ExpectedBody {
-		t.Error("expected body to be", ExpectedBody, "was", string(body))
 	}
 }
 
 func TestAlertProvider_buildHTTPRequestWithCustomPlaceholder(t *testing.T) {
-	const (
-		ExpectedURL  = "https://example.com/endpoint-name?event=test&description=alert-description"
-		ExpectedBody = "endpoint-name,alert-description,test"
-	)
 	customAlertProvider := &AlertProvider{
-		URL:     "https://example.com/[ENDPOINT_NAME]?event=[ALERT_TRIGGERED_OR_RESOLVED]&description=[ALERT_DESCRIPTION]",
+		URL:     "https://example.com/[ENDPOINT_GROUP]/[ENDPOINT_NAME]?event=[ALERT_TRIGGERED_OR_RESOLVED]&description=[ALERT_DESCRIPTION]",
-		Body:    "[ENDPOINT_NAME],[ALERT_DESCRIPTION],[ALERT_TRIGGERED_OR_RESOLVED]",
+		Body:    "[ENDPOINT_NAME],[ENDPOINT_GROUP],[ALERT_DESCRIPTION],[ALERT_TRIGGERED_OR_RESOLVED]",
 		Headers: nil,
 		Placeholders: map[string]map[string]string{
 			"ALERT_TRIGGERED_OR_RESOLVED": {
-				"RESOLVED": "test",
+				"RESOLVED":  "fixed",
+				"TRIGGERED": "boom",
 			},
 		},
 	}
-	request := customAlertProvider.buildHTTPRequest("endpoint-name", "alert-description", true)
+	alertDescription := "alert-description"
-	if request.URL.String() != ExpectedURL {
+	scenarios := []struct {
-		t.Error("expected URL to be", ExpectedURL, "was", request.URL.String())
+		AlertProvider *AlertProvider
+		Resolved      bool
+		ExpectedURL   string
+		ExpectedBody  string
+	}{
+		{
+			AlertProvider: customAlertProvider,
+			Resolved:      true,
+			ExpectedURL:   "https://example.com/endpoint-group/endpoint-name?event=fixed&description=alert-description",
+			ExpectedBody:  "endpoint-name,endpoint-group,alert-description,fixed",
+		},
+		{
+			AlertProvider: customAlertProvider,
+			Resolved:      false,
+			ExpectedURL:   "https://example.com/endpoint-group/endpoint-name?event=boom&description=alert-description",
+			ExpectedBody:  "endpoint-name,endpoint-group,alert-description,boom",
+		},
 	}
-	body, _ := io.ReadAll(request.Body)
+	for _, scenario := range scenarios {
-	if string(body) != ExpectedBody {
+		t.Run(fmt.Sprintf("resolved-%v-with-custom-placeholders", scenario.Resolved), func(t *testing.T) {
-		t.Error("expected body to be", ExpectedBody, "was", string(body))
+			request := customAlertProvider.buildHTTPRequest(
+				&core.Endpoint{Name: "endpoint-name", Group: "endpoint-group"},
+				&alert.Alert{Description: &alertDescription},
+				scenario.Resolved,
+			)
+			if request.URL.String() != scenario.ExpectedURL {
+				t.Error("expected URL to be", scenario.ExpectedURL, "got", request.URL.String())
+			}
+			body, _ := io.ReadAll(request.Body)
+			if string(body) != scenario.ExpectedBody {
+				t.Error("expected body to be", scenario.ExpectedBody, "got", string(body))
+			}
+		})
 	}
 }
 
 func TestAlertProvider_GetAlertStatePlaceholderValueDefaults(t *testing.T) {
 	customAlertProvider := &AlertProvider{
-		URL:          "https://example.com/[ENDPOINT_NAME]?event=[ALERT_TRIGGERED_OR_RESOLVED]&description=[ALERT_DESCRIPTION]",
+		URL:  "https://example.com/[ENDPOINT_NAME]?event=[ALERT_TRIGGERED_OR_RESOLVED]&description=[ALERT_DESCRIPTION]",
-		Body:         "[ENDPOINT_NAME],[ALERT_DESCRIPTION],[ALERT_TRIGGERED_OR_RESOLVED]",
+		Body: "[ENDPOINT_NAME],[ENDPOINT_GROUP],[ALERT_DESCRIPTION],[ALERT_TRIGGERED_OR_RESOLVED]",
-		Headers:      nil,
-		Placeholders: nil,
 	}
 	if customAlertProvider.GetAlertStatePlaceholderValue(true) != "RESOLVED" {
 		t.Error("expected RESOLVED, got", customAlertProvider.GetAlertStatePlaceholderValue(true))
@@ -187,26 +224,3 @@ func TestAlertProvider_GetDefaultAlert(t *testing.T) {
 		t.Error("expected default alert to be nil")
 	}
 }
-
-// TestAlertProvider_isBackwardCompatibleWithServiceRename checks if the custom alerting provider still supports
-// service placeholders after the migration from "service" to "endpoint"
-//
-// XXX: Remove this in v4.0.0
-func TestAlertProvider_isBackwardCompatibleWithServiceRename(t *testing.T) {
-	const (
-		ExpectedURL  = "https://example.com/endpoint-name?event=TRIGGERED&description=alert-description"
-		ExpectedBody = "endpoint-name,alert-description,TRIGGERED"
-	)
-	customAlertProvider := &AlertProvider{
-		URL:  "https://example.com/[SERVICE_NAME]?event=[ALERT_TRIGGERED_OR_RESOLVED]&description=[ALERT_DESCRIPTION]",
-		Body: "[SERVICE_NAME],[ALERT_DESCRIPTION],[ALERT_TRIGGERED_OR_RESOLVED]",
-	}
-	request := customAlertProvider.buildHTTPRequest("endpoint-name", "alert-description", false)
-	if request.URL.String() != ExpectedURL {
-		t.Error("expected URL to be", ExpectedURL, "was", request.URL.String())
-	}
-	body, _ := io.ReadAll(request.Body)
-	if string(body) != ExpectedBody {
-		t.Error("expected body to be", ExpectedBody, "was", string(body))
-	}
-}

alerting/provider/discord/discord.go

@@ -6,9 +6,9 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Discord
@@ -17,17 +17,35 @@ type AlertProvider struct {
 
 	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
 	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group      string `yaml:"group"`
+	WebhookURL string `yaml:"webhook-url"`
 }
 
 // IsValid returns whether the provider's configuration is valid
 func (provider *AlertProvider) IsValid() bool {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.WebhookURL) == 0 {
+				return false
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
 	return len(provider.WebhookURL) > 0
 }
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
 	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
-	request, err := http.NewRequest(http.MethodPost, provider.WebhookURL, buffer)
+	request, err := http.NewRequest(http.MethodPost, provider.getWebhookURLForGroup(endpoint.Group), buffer)
 	if err != nil {
 		return err
 	}
@@ -86,6 +104,18 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 }`, message, description, colorCode, results)
 }
 
+// getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group
+func (provider *AlertProvider) getWebhookURLForGroup(group string) string {
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				return override.WebhookURL
+			}
+		}
+	}
+	return provider.WebhookURL
+}
+
 // GetDefaultAlert returns the provider's default alert configuration
 func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
 	return provider.DefaultAlert

alerting/provider/discord/discord_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {
@@ -22,6 +22,43 @@ func TestAlertProvider_IsValid(t *testing.T) {
 	}
 }
 
+func TestAlertProvider_IsValidWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "",
+			},
+		},
+	}
+	if providerWithInvalidOverrideGroup.IsValid() {
+		t.Error("provider Group shouldn't have been valid")
+	}
+	providerWithInvalidOverrideTo := AlertProvider{
+		Overrides: []Override{
+			{
+				WebhookURL: "",
+				Group:      "group",
+			},
+		},
+	}
+	if providerWithInvalidOverrideTo.IsValid() {
+		t.Error("provider integration key shouldn't have been valid")
+	}
+	providerWithValidOverride := AlertProvider{
+		WebhookURL: "http://example.com",
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "group",
+			},
+		},
+	}
+	if !providerWithValidOverride.IsValid() {
+		t.Error("provider should've been valid")
+	}
+}
+
 func TestAlertProvider_Send(t *testing.T) {
 	defer client.InjectHTTPClient(nil)
 	firstDescription := "description-1"
@@ -156,3 +193,66 @@ func TestAlertProvider_GetDefaultAlert(t *testing.T) {
 		t.Error("expected default alert to be nil")
 	}
 }
+
+func TestAlertProvider_getWebhookURLForGroup(t *testing.T) {
+	tests := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		ExpectedOutput string
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example01.com",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.Name, func(t *testing.T) {
+			if got := tt.Provider.getWebhookURLForGroup(tt.InputGroup); got != tt.ExpectedOutput {
+				t.Errorf("AlertProvider.getWebhookURLForGroup() = %v, want %v", got, tt.ExpectedOutput)
+			}
+		})
+	}
+}

alerting/provider/email/email.go

@@ -5,8 +5,8 @@ import (
 	"math"
 	"strings"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 	gomail "gopkg.in/mail.v2"
 )
 
@@ -21,10 +21,29 @@ type AlertProvider struct {
 
 	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
 	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group string `yaml:"group"`
+	To    string `yaml:"to"`
 }
 
 // IsValid returns whether the provider's configuration is valid
 func (provider *AlertProvider) IsValid() bool {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.To) == 0 {
+				return false
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+
 	return len(provider.From) > 0 && len(provider.Password) > 0 && len(provider.Host) > 0 && len(provider.To) > 0 && provider.Port > 0 && provider.Port < math.MaxUint16
 }
 
@@ -39,7 +58,7 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	subject, body := provider.buildMessageSubjectAndBody(endpoint, alert, result, resolved)
 	m := gomail.NewMessage()
 	m.SetHeader("From", provider.From)
-	m.SetHeader("To", strings.Split(provider.To, ",")...)
+	m.SetHeader("To", strings.Split(provider.getToForGroup(endpoint.Group), ",")...)
 	m.SetHeader("Subject", subject)
 	m.SetBody("text/plain", body)
 	d := gomail.NewDialer(provider.Host, provider.Port, username, provider.Password)
@@ -72,6 +91,18 @@ func (provider *AlertProvider) buildMessageSubjectAndBody(endpoint *core.Endpoin
 	return subject, message + description + "\n\nCondition results:\n" + results
 }
 
+// getToForGroup returns the appropriate email integration to for a given group
+func (provider *AlertProvider) getToForGroup(group string) string {
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				return override.To
+			}
+		}
+	}
+	return provider.To
+}
+
 // GetDefaultAlert returns the provider's default alert configuration
 func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
 	return provider.DefaultAlert

alerting/provider/email/email_test.go

@@ -3,11 +3,11 @@ package email
 import (
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
-func TestAlertProvider_IsValid(t *testing.T) {
+func TestAlertDefaultProvider_IsValid(t *testing.T) {
 	invalidProvider := AlertProvider{}
 	if invalidProvider.IsValid() {
 		t.Error("provider shouldn't have been valid")
@@ -18,6 +18,47 @@ func TestAlertProvider_IsValid(t *testing.T) {
 	}
 }
 
+func TestAlertProvider_IsValidWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		Overrides: []Override{
+			{
+				To:    "to@example.com",
+				Group: "",
+			},
+		},
+	}
+	if providerWithInvalidOverrideGroup.IsValid() {
+		t.Error("provider Group shouldn't have been valid")
+	}
+	providerWithInvalidOverrideTo := AlertProvider{
+		Overrides: []Override{
+			{
+				To:    "",
+				Group: "group",
+			},
+		},
+	}
+	if providerWithInvalidOverrideTo.IsValid() {
+		t.Error("provider integration key shouldn't have been valid")
+	}
+	providerWithValidOverride := AlertProvider{
+		From:     "from@example.com",
+		Password: "password",
+		Host:     "smtp.gmail.com",
+		Port:     587,
+		To:       "to@example.com",
+		Overrides: []Override{
+			{
+				To:    "to@example.com",
+				Group: "group",
+			},
+		},
+	}
+	if !providerWithValidOverride.IsValid() {
+		t.Error("provider should've been valid")
+	}
+}
+
 func TestAlertProvider_buildRequestBody(t *testing.T) {
 	firstDescription := "description-1"
 	secondDescription := "description-2"
@@ -77,3 +118,66 @@ func TestAlertProvider_GetDefaultAlert(t *testing.T) {
 		t.Error("expected default alert to be nil")
 	}
 }
+
+func TestAlertProvider_getToForGroup(t *testing.T) {
+	tests := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		ExpectedOutput string
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				To:        "to@example.com",
+				Overrides: nil,
+			},
+			InputGroup:     "",
+			ExpectedOutput: "to@example.com",
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				To:        "to@example.com",
+				Overrides: nil,
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "to@example.com",
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				To: "to@example.com",
+				Overrides: []Override{
+					{
+						Group: "group",
+						To:    "to01@example.com",
+					},
+				},
+			},
+			InputGroup:     "",
+			ExpectedOutput: "to@example.com",
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				To: "to@example.com",
+				Overrides: []Override{
+					{
+						Group: "group",
+						To:    "to01@example.com",
+					},
+				},
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "to01@example.com",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.Name, func(t *testing.T) {
+			if got := tt.Provider.getToForGroup(tt.InputGroup); got != tt.ExpectedOutput {
+				t.Errorf("AlertProvider.getToForGroup() = %v, want %v", got, tt.ExpectedOutput)
+			}
+		})
+	}
+}

alerting/provider/googlechat/googlechat.go

@@ -6,9 +6,9 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Google chat
@@ -20,6 +20,15 @@ type AlertProvider struct {
 
 	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
 	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group      string `yaml:"group"`
+	WebhookURL string `yaml:"webhook-url"`
 }
 
 // IsValid returns whether the provider's configuration is valid
@@ -27,13 +36,24 @@ func (provider *AlertProvider) IsValid() bool {
 	if provider.ClientConfig == nil {
 		provider.ClientConfig = client.GetDefaultConfig()
 	}
+
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.WebhookURL) == 0 {
+				return false
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+
 	return len(provider.WebhookURL) > 0
 }
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
 	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
-	request, err := http.NewRequest(http.MethodPost, provider.WebhookURL, buffer)
+	request, err := http.NewRequest(http.MethodPost, provider.getWebhookURLForGroup(endpoint.Group), buffer)
 	if err != nil {
 		return err
 	}
@@ -118,6 +138,18 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 }`, endpoint.Name, endpoint.Group, message, description, results, endpoint.URL)
 }
 
+// getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group
+func (provider *AlertProvider) getWebhookURLForGroup(group string) string {
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				return override.WebhookURL
+			}
+		}
+	}
+	return provider.WebhookURL
+}
+
 // GetDefaultAlert returns the provider's default alert configuration
 func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
 	return provider.DefaultAlert

alerting/provider/googlechat/googlechat_test.go

@@ -5,13 +5,13 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
-func TestAlertProvider_IsValid(t *testing.T) {
+func TestAlertDefaultProvider_IsValid(t *testing.T) {
 	invalidProvider := AlertProvider{WebhookURL: ""}
 	if invalidProvider.IsValid() {
 		t.Error("provider shouldn't have been valid")
@@ -22,6 +22,43 @@ func TestAlertProvider_IsValid(t *testing.T) {
 	}
 }
 
+func TestAlertProvider_IsValidWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "",
+			},
+		},
+	}
+	if providerWithInvalidOverrideGroup.IsValid() {
+		t.Error("provider Group shouldn't have been valid")
+	}
+	providerWithInvalidOverrideTo := AlertProvider{
+		Overrides: []Override{
+			{
+				WebhookURL: "",
+				Group:      "group",
+			},
+		},
+	}
+	if providerWithInvalidOverrideTo.IsValid() {
+		t.Error("provider integration key shouldn't have been valid")
+	}
+	providerWithValidOverride := AlertProvider{
+		WebhookURL: "http://example.com",
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "group",
+			},
+		},
+	}
+	if !providerWithValidOverride.IsValid() {
+		t.Error("provider should've been valid")
+	}
+}
+
 func TestAlertProvider_Send(t *testing.T) {
 	defer client.InjectHTTPClient(nil)
 	firstDescription := "description-1"
@@ -158,3 +195,66 @@ func TestAlertProvider_GetDefaultAlert(t *testing.T) {
 		t.Error("expected default alert to be nil")
 	}
 }
+
+func TestAlertProvider_getWebhookURLForGroup(t *testing.T) {
+	tests := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		ExpectedOutput string
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example01.com",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.Name, func(t *testing.T) {
+			if got := tt.Provider.getWebhookURLForGroup(tt.InputGroup); got != tt.ExpectedOutput {
+				t.Errorf("AlertProvider.getToForGroup() = %v, want %v", got, tt.ExpectedOutput)
+			}
+		})
+	}
+}

alerting/provider/matrix/matrix.go

@@ -0,0 +1,183 @@
+package matrix
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"math/rand"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/TwiN/gatus/v4/alerting/alert"
+	"github.com/TwiN/gatus/v4/client"
+	"github.com/TwiN/gatus/v4/core"
+)
+
+// AlertProvider is the configuration necessary for sending an alert using Matrix
+type AlertProvider struct {
+	MatrixProviderConfig `yaml:",inline"`
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group string `yaml:"group"`
+
+	MatrixProviderConfig `yaml:",inline"`
+}
+
+const defaultHomeserverURL = "https://matrix-client.matrix.org"
+
+type MatrixProviderConfig struct {
+	// ServerURL is the custom homeserver to use (optional)
+	ServerURL string `yaml:"server-url"`
+
+	// AccessToken is the bot user's access token to send messages
+	AccessToken string `yaml:"access-token"`
+
+	// InternalRoomID is the room that the bot user has permissions to send messages to
+	InternalRoomID string `yaml:"internal-room-id"`
+}
+
+// IsValid returns whether the provider's configuration is valid
+func (provider *AlertProvider) IsValid() bool {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.AccessToken) == 0 || len(override.InternalRoomID) == 0 {
+				return false
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
+	return len(provider.AccessToken) > 0 && len(provider.InternalRoomID) > 0
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
+	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	config := provider.getConfigForGroup(endpoint.Group)
+	if config.ServerURL == "" {
+		config.ServerURL = defaultHomeserverURL
+	}
+	// The Matrix endpoint requires a unique transaction ID for each event sent
+	txnId := randStringBytes(24)
+	request, err := http.NewRequest(
+		http.MethodPut,
+		fmt.Sprintf("%s/_matrix/client/v3/rooms/%s/send/m.room.message/%s?access_token=%s",
+			config.ServerURL,
+			url.PathEscape(config.InternalRoomID),
+			txnId,
+			url.QueryEscape(config.AccessToken),
+		),
+		buffer,
+	)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	if response.StatusCode > 399 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return err
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+	return fmt.Sprintf(`{
+	"msgtype": "m.text",
+	"format": "org.matrix.custom.html",
+	"body": "%s",
+	"formatted_body": "%s"
+}`,
+		buildPlaintextMessageBody(endpoint, alert, result, resolved),
+		buildHTMLMessageBody(endpoint, alert, result, resolved),
+	)
+}
+
+// buildPlaintextMessageBody builds the message body in plaintext to include in request
+func buildPlaintextMessageBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+	var message, results string
+	if resolved {
+		message = fmt.Sprintf("An alert for `%s` has been resolved after passing successfully %d time(s) in a row", endpoint.DisplayName(), alert.SuccessThreshold)
+	} else {
+		message = fmt.Sprintf("An alert for `%s` has been triggered due to having failed %d time(s) in a row", endpoint.DisplayName(), alert.FailureThreshold)
+	}
+	for _, conditionResult := range result.ConditionResults {
+		var prefix string
+		if conditionResult.Success {
+			prefix = "✓"
+		} else {
+			prefix = "✕"
+		}
+		results += fmt.Sprintf("\\n%s - %s", prefix, conditionResult.Condition)
+	}
+	var description string
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		description = "\\n" + alertDescription
+	}
+	return fmt.Sprintf("%s%s\\n%s", message, description, results)
+}
+
+// buildHTMLMessageBody builds the message body in HTML to include in request
+func buildHTMLMessageBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+	var message, results string
+	if resolved {
+		message = fmt.Sprintf("An alert for <code>%s</code> has been resolved after passing successfully %d time(s) in a row", endpoint.DisplayName(), alert.SuccessThreshold)
+	} else {
+		message = fmt.Sprintf("An alert for <code>%s</code> has been triggered due to having failed %d time(s) in a row", endpoint.DisplayName(), alert.FailureThreshold)
+	}
+	for _, conditionResult := range result.ConditionResults {
+		var prefix string
+		if conditionResult.Success {
+			prefix = "✅"
+		} else {
+			prefix = "❌"
+		}
+		results += fmt.Sprintf("<li>%s - <code>%s</code></li>", prefix, conditionResult.Condition)
+	}
+	var description string
+	if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
+		description = fmt.Sprintf("\\n<blockquote>%s</blockquote>", alertDescription)
+	}
+	return fmt.Sprintf("<h3>%s</h3>%s\\n<h5>Condition results</h5><ul>%s</ul>", message, description, results)
+}
+
+// getConfigForGroup returns the appropriate configuration for a given group
+func (provider *AlertProvider) getConfigForGroup(group string) MatrixProviderConfig {
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				return override.MatrixProviderConfig
+			}
+		}
+	}
+	return provider.MatrixProviderConfig
+}
+
+func randStringBytes(n int) string {
+	// All the compatible characters to use in a transaction ID
+	const availableCharacterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+	b := make([]byte, n)
+	rand.Seed(time.Now().UnixNano())
+	for i := range b {
+		b[i] = availableCharacterBytes[rand.Intn(len(availableCharacterBytes))]
+	}
+	return string(b)
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}

alerting/provider/matrix/matrix_test.go

@@ -0,0 +1,331 @@
+package matrix
+
+import (
+	"encoding/json"
+	"net/http"
+	"testing"
+
+	"github.com/TwiN/gatus/v4/alerting/alert"
+	"github.com/TwiN/gatus/v4/client"
+	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v4/test"
+)
+
+func TestAlertProvider_IsValid(t *testing.T) {
+	invalidProvider := AlertProvider{
+		MatrixProviderConfig: MatrixProviderConfig{
+			AccessToken:    "",
+			InternalRoomID: "",
+		},
+	}
+	if invalidProvider.IsValid() {
+		t.Error("provider shouldn't have been valid")
+	}
+	validProvider := AlertProvider{
+		MatrixProviderConfig: MatrixProviderConfig{
+			AccessToken:    "1",
+			InternalRoomID: "!a:example.com",
+		},
+	}
+	if !validProvider.IsValid() {
+		t.Error("provider should've been valid")
+	}
+	validProviderWithHomeserver := AlertProvider{
+		MatrixProviderConfig: MatrixProviderConfig{
+			ServerURL:      "https://example.com",
+			AccessToken:    "1",
+			InternalRoomID: "!a:example.com",
+		},
+	}
+	if !validProviderWithHomeserver.IsValid() {
+		t.Error("provider with homeserver should've been valid")
+	}
+}
+
+func TestAlertProvider_IsValidWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		Overrides: []Override{
+			{
+				Group: "",
+				MatrixProviderConfig: MatrixProviderConfig{
+					AccessToken:    "",
+					InternalRoomID: "",
+				},
+			},
+		},
+	}
+	if providerWithInvalidOverrideGroup.IsValid() {
+		t.Error("provider Group shouldn't have been valid")
+	}
+	providerWithInvalidOverrideTo := AlertProvider{
+		Overrides: []Override{
+			{
+				Group: "group",
+				MatrixProviderConfig: MatrixProviderConfig{
+					AccessToken:    "",
+					InternalRoomID: "",
+				},
+			},
+		},
+	}
+	if providerWithInvalidOverrideTo.IsValid() {
+		t.Error("provider integration key shouldn't have been valid")
+	}
+	providerWithValidOverride := AlertProvider{
+		MatrixProviderConfig: MatrixProviderConfig{
+			AccessToken:    "1",
+			InternalRoomID: "!a:example.com",
+		},
+		Overrides: []Override{
+			{
+				Group: "group",
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+			},
+		},
+	}
+	if !providerWithValidOverride.IsValid() {
+		t.Error("provider should've been valid")
+	}
+}
+
+func TestAlertProvider_Send(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name             string
+		Provider         AlertProvider
+		Alert            alert.Alert
+		Resolved         bool
+		MockRoundTripper test.MockRoundTripper
+		ExpectedError    bool
+	}{
+		{
+			Name:     "triggered",
+			Provider: AlertProvider{},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:     "triggered-error",
+			Provider: AlertProvider{},
+			Alert:    alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: false,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+		{
+			Name:     "resolved",
+			Provider: AlertProvider{},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+			ExpectedError: false,
+		},
+		{
+			Name:     "resolved-error",
+			Provider: AlertProvider{},
+			Alert:    alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved: true,
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusInternalServerError, Body: http.NoBody}
+			}),
+			ExpectedError: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
+			err := scenario.Provider.Send(
+				&core.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&core.Result{
+					ConditionResults: []*core.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if scenario.ExpectedError && err == nil {
+				t.Error("expected error, got none")
+			}
+			if !scenario.ExpectedError && err != nil {
+				t.Error("expected no error, got", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_buildRequestBody(t *testing.T) {
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name         string
+		Provider     AlertProvider
+		Alert        alert.Alert
+		Resolved     bool
+		ExpectedBody string
+	}{
+		{
+			Name:         "triggered",
+			Provider:     AlertProvider{},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: "{\n\t\"msgtype\": \"m.text\",\n\t\"format\": \"org.matrix.custom.html\",\n\t\"body\": \"An alert for `endpoint-name` has been triggered due to having failed 3 time(s) in a row\\ndescription-1\\n\\n✕ - [CONNECTED] == true\\n✕ - [STATUS] == 200\",\n\t\"formatted_body\": \"<h3>An alert for <code>endpoint-name</code> has been triggered due to having failed 3 time(s) in a row</h3>\\n<blockquote>description-1</blockquote>\\n<h5>Condition results</h5><ul><li>❌ - <code>[CONNECTED] == true</code></li><li>❌ - <code>[STATUS] == 200</code></li></ul>\"\n}",
+		},
+		{
+			Name:         "resolved",
+			Provider:     AlertProvider{},
+			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     true,
+			ExpectedBody: "{\n\t\"msgtype\": \"m.text\",\n\t\"format\": \"org.matrix.custom.html\",\n\t\"body\": \"An alert for `endpoint-name` has been resolved after passing successfully 5 time(s) in a row\\ndescription-2\\n\\n✓ - [CONNECTED] == true\\n✓ - [STATUS] == 200\",\n\t\"formatted_body\": \"<h3>An alert for <code>endpoint-name</code> has been resolved after passing successfully 5 time(s) in a row</h3>\\n<blockquote>description-2</blockquote>\\n<h5>Condition results</h5><ul><li>✅ - <code>[CONNECTED] == true</code></li><li>✅ - <code>[STATUS] == 200</code></li></ul>\"\n}",
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			body := scenario.Provider.buildRequestBody(
+				&core.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&core.Result{
+					ConditionResults: []*core.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if body != scenario.ExpectedBody {
+				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
+			}
+			out := make(map[string]interface{})
+			if err := json.Unmarshal([]byte(body), &out); err != nil {
+				t.Error("expected body to be valid JSON, got error:", err.Error())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_GetDefaultAlert(t *testing.T) {
+	if (AlertProvider{DefaultAlert: &alert.Alert{}}).GetDefaultAlert() == nil {
+		t.Error("expected default alert to be not nil")
+	}
+	if (AlertProvider{DefaultAlert: nil}).GetDefaultAlert() != nil {
+		t.Error("expected default alert to be nil")
+	}
+}
+
+func TestAlertProvider_getConfigForGroup(t *testing.T) {
+	tests := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		ExpectedOutput MatrixProviderConfig
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+				Overrides: nil,
+			},
+			InputGroup: "",
+			ExpectedOutput: MatrixProviderConfig{
+				ServerURL:      "https://example.com",
+				AccessToken:    "1",
+				InternalRoomID: "!a:example.com",
+			},
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+				Overrides: nil,
+			},
+			InputGroup: "group",
+			ExpectedOutput: MatrixProviderConfig{
+				ServerURL:      "https://example.com",
+				AccessToken:    "1",
+				InternalRoomID: "!a:example.com",
+			},
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+				Overrides: []Override{
+					{
+						Group: "group",
+						MatrixProviderConfig: MatrixProviderConfig{
+							ServerURL:      "https://example01.com",
+							AccessToken:    "12",
+							InternalRoomID: "!a:example01.com",
+						},
+					},
+				},
+			},
+			InputGroup: "",
+			ExpectedOutput: MatrixProviderConfig{
+				ServerURL:      "https://example.com",
+				AccessToken:    "1",
+				InternalRoomID: "!a:example.com",
+			},
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				MatrixProviderConfig: MatrixProviderConfig{
+					ServerURL:      "https://example.com",
+					AccessToken:    "1",
+					InternalRoomID: "!a:example.com",
+				},
+				Overrides: []Override{
+					{
+						Group: "group",
+						MatrixProviderConfig: MatrixProviderConfig{
+							ServerURL:      "https://example01.com",
+							AccessToken:    "12",
+							InternalRoomID: "!a:example01.com",
+						},
+					},
+				},
+			},
+			InputGroup: "group",
+			ExpectedOutput: MatrixProviderConfig{
+				ServerURL:      "https://example01.com",
+				AccessToken:    "12",
+				InternalRoomID: "!a:example01.com",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.Name, func(t *testing.T) {
+			if got := tt.Provider.getConfigForGroup(tt.InputGroup); got != tt.ExpectedOutput {
+				t.Errorf("AlertProvider.getConfigForGroup() = %v, want %v", got, tt.ExpectedOutput)
+			}
+		})
+	}
+}

alerting/provider/mattermost/mattermost.go

@@ -6,9 +6,9 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Mattermost
@@ -20,6 +20,15 @@ type AlertProvider struct {
 
 	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
 	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group      string `yaml:"group"`
+	WebhookURL string `yaml:"webhook-url"`
 }
 
 // IsValid returns whether the provider's configuration is valid
@@ -27,13 +36,22 @@ func (provider *AlertProvider) IsValid() bool {
 	if provider.ClientConfig == nil {
 		provider.ClientConfig = client.GetDefaultConfig()
 	}
+	if provider.Overrides != nil {
+		registeredGroups := make(map[string]bool)
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.WebhookURL) == 0 {
+				return false
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
 	return len(provider.WebhookURL) > 0
 }
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
 	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
-	request, err := http.NewRequest(http.MethodPost, provider.WebhookURL, buffer)
+	request, err := http.NewRequest(http.MethodPost, provider.getWebhookURLForGroup(endpoint.Group), buffer)
 	if err != nil {
 		return err
 	}
@@ -101,6 +119,18 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 }`, message, message, description, color, endpoint.URL, results)
 }
 
+// getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group
+func (provider *AlertProvider) getWebhookURLForGroup(group string) string {
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				return override.WebhookURL
+			}
+		}
+	}
+	return provider.WebhookURL
+}
+
 // GetDefaultAlert returns the provider's default alert configuration
 func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
 	return provider.DefaultAlert

alerting/provider/mattermost/mattermost_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {
@@ -22,6 +22,47 @@ func TestAlertProvider_IsValid(t *testing.T) {
 	}
 }
 
+func TestAlertProvider_IsValidWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "",
+			},
+		},
+	}
+
+	if providerWithInvalidOverrideGroup.IsValid() {
+		t.Error("provider Group shouldn't have been valid")
+	}
+
+	providerWithInvalidOverrideWebHookUrl := AlertProvider{
+		Overrides: []Override{
+			{
+
+				WebhookURL: "",
+				Group:      "group",
+			},
+		},
+	}
+	if providerWithInvalidOverrideWebHookUrl.IsValid() {
+		t.Error("provider WebHookURL shoudn't have been valid")
+	}
+
+	providerWithValidOverride := AlertProvider{
+		WebhookURL: "http://example.com",
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "group",
+			},
+		},
+	}
+	if !providerWithValidOverride.IsValid() {
+		t.Error("provider should've been valid")
+	}
+}
+
 func TestAlertProvider_Send(t *testing.T) {
 	defer client.InjectHTTPClient(nil)
 	firstDescription := "description-1"
@@ -156,3 +197,66 @@ func TestAlertProvider_GetDefaultAlert(t *testing.T) {
 		t.Error("expected default alert to be nil")
 	}
 }
+
+func TestAlertProvider_getWebhookURLForGroup(t *testing.T) {
+	tests := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		ExpectedOutput string
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example01.com",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.Name, func(t *testing.T) {
+			if got := tt.Provider.getWebhookURLForGroup(tt.InputGroup); got != tt.ExpectedOutput {
+				t.Errorf("AlertProvider.getToForGroup() = %v, want %v", got, tt.ExpectedOutput)
+			}
+		})
+	}
+}

alerting/provider/messagebird/messagebird.go

@@ -2,13 +2,14 @@ package messagebird
 
 import (
 	"bytes"
+	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 const (
@@ -33,7 +34,7 @@ func (provider *AlertProvider) IsValid() bool {
 // Send an alert using the provider
 // Reference doc for messagebird: https://developers.messagebird.com/api/sms-messaging/#send-outbound-sms
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
-	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	buffer := bytes.NewBuffer(provider.buildRequestBody(endpoint, alert, result, resolved))
 	request, err := http.NewRequest(http.MethodPost, restAPIURL, buffer)
 	if err != nil {
 		return err
@@ -51,19 +52,26 @@ func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert,
 	return err
 }
 
+type Body struct {
+	Originator string `json:"originator"`
+	Recipients string `json:"recipients"`
+	Body       string `json:"body"`
+}
+
 // buildRequestBody builds the request body for the provider
-func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
 	var message string
 	if resolved {
 		message = fmt.Sprintf("RESOLVED: %s - %s", endpoint.DisplayName(), alert.GetDescription())
 	} else {
 		message = fmt.Sprintf("TRIGGERED: %s - %s", endpoint.DisplayName(), alert.GetDescription())
 	}
-	return fmt.Sprintf(`{
+	body, _ := json.Marshal(Body{
-  "originator": "%s",
+		Originator: provider.Originator,
-  "recipients": "%s",
+		Recipients: provider.Recipients,
-  "body": "%s"
+		Body:       message,
-}`, provider.Originator, provider.Recipients, message)
+	})
+	return body
 }
 
 // GetDefaultAlert returns the provider's default alert configuration

alerting/provider/messagebird/messagebird_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
 func TestMessagebirdAlertProvider_IsValid(t *testing.T) {
@@ -118,14 +118,14 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 			Provider:     AlertProvider{AccessKey: "1", Originator: "2", Recipients: "3"},
 			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     false,
-			ExpectedBody: "{\n  \"originator\": \"2\",\n  \"recipients\": \"3\",\n  \"body\": \"TRIGGERED: endpoint-name - description-1\"\n}",
+			ExpectedBody: "{\"originator\":\"2\",\"recipients\":\"3\",\"body\":\"TRIGGERED: endpoint-name - description-1\"}",
 		},
 		{
 			Name:         "resolved",
 			Provider:     AlertProvider{AccessKey: "4", Originator: "5", Recipients: "6"},
 			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
 			Resolved:     true,
-			ExpectedBody: "{\n  \"originator\": \"5\",\n  \"recipients\": \"6\",\n  \"body\": \"RESOLVED: endpoint-name - description-2\"\n}",
+			ExpectedBody: "{\"originator\":\"5\",\"recipients\":\"6\",\"body\":\"RESOLVED: endpoint-name - description-2\"}",
 		},
 	}
 	for _, scenario := range scenarios {
@@ -141,7 +141,7 @@ func TestAlertProvider_buildRequestBody(t *testing.T) {
 				},
 				scenario.Resolved,
 			)
-			if body != scenario.ExpectedBody {
+			if string(body) != scenario.ExpectedBody {
 				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
 			}
 			out := make(map[string]interface{})

alerting/provider/ntfy/ntfy.go

@@ -0,0 +1,94 @@
+package ntfy
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/TwiN/gatus/v4/alerting/alert"
+	"github.com/TwiN/gatus/v4/client"
+	"github.com/TwiN/gatus/v4/core"
+)
+
+const (
+	DefaultURL      = "https://ntfy.sh"
+	DefaultPriority = 3
+)
+
+// AlertProvider is the configuration necessary for sending an alert using Slack
+type AlertProvider struct {
+	Topic    string `yaml:"topic"`
+	URL      string `yaml:"url,omitempty"`      // Defaults to DefaultURL
+	Priority int    `yaml:"priority,omitempty"` // Defaults to DefaultPriority
+
+	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
+	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+}
+
+// IsValid returns whether the provider's configuration is valid
+func (provider *AlertProvider) IsValid() bool {
+	if len(provider.URL) == 0 {
+		provider.URL = DefaultURL
+	}
+	if provider.Priority == 0 {
+		provider.Priority = DefaultPriority
+	}
+	return len(provider.URL) > 0 && len(provider.Topic) > 0 && provider.Priority > 0 && provider.Priority < 6
+}
+
+// Send an alert using the provider
+func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
+	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
+	request, err := http.NewRequest(http.MethodPost, provider.URL, buffer)
+	if err != nil {
+		return err
+	}
+	request.Header.Set("Content-Type", "application/json")
+	response, err := client.GetHTTPClient(nil).Do(request)
+	if err != nil {
+		return err
+	}
+	if response.StatusCode > 399 {
+		body, _ := io.ReadAll(response.Body)
+		return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
+	}
+	return err
+}
+
+type Body struct {
+	Topic    string   `json:"topic"`
+	Title    string   `json:"title"`
+	Message  string   `json:"message"`
+	Tags     []string `json:"tags"`
+	Priority int      `json:"priority"`
+}
+
+// buildRequestBody builds the request body for the provider
+func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) []byte {
+	var message, tag string
+	if len(alert.GetDescription()) > 0 {
+		message = endpoint.DisplayName() + " - " + alert.GetDescription()
+	} else {
+		message = endpoint.DisplayName()
+	}
+	if resolved {
+		tag = "white_check_mark"
+	} else {
+		tag = "x"
+	}
+	body, _ := json.Marshal(Body{
+		Topic:    provider.Topic,
+		Title:    "Gatus",
+		Message:  message,
+		Tags:     []string{tag},
+		Priority: provider.Priority,
+	})
+	return body
+}
+
+// GetDefaultAlert returns the provider's default alert configuration
+func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
+	return provider.DefaultAlert
+}

alerting/provider/ntfy/ntfy_test.go

@@ -0,0 +1,104 @@
+package ntfy
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/TwiN/gatus/v4/alerting/alert"
+	"github.com/TwiN/gatus/v4/core"
+)
+
+func TestAlertDefaultProvider_IsValid(t *testing.T) {
+	scenarios := []struct {
+		name     string
+		provider AlertProvider
+		expected bool
+	}{
+		{
+			name:     "valid",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: 1},
+			expected: true,
+		},
+		{
+			name:     "no-url-should-use-default-value",
+			provider: AlertProvider{Topic: "example", Priority: 1},
+			expected: true,
+		},
+		{
+			name:     "invalid-topic",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "", Priority: 1},
+			expected: false,
+		},
+		{
+			name:     "invalid-priority-too-high",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: 6},
+			expected: false,
+		},
+		{
+			name:     "invalid-priority-too-low",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: -1},
+			expected: false,
+		},
+		{
+			name:     "no-priority-should-use-default-value",
+			provider: AlertProvider{URL: "https://ntfy.sh", Topic: "example"},
+			expected: true,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.name, func(t *testing.T) {
+			if scenario.provider.IsValid() != scenario.expected {
+				t.Errorf("expected %t, got %t", scenario.expected, scenario.provider.IsValid())
+			}
+		})
+	}
+}
+
+func TestAlertProvider_buildRequestBody(t *testing.T) {
+	firstDescription := "description-1"
+	secondDescription := "description-2"
+	scenarios := []struct {
+		Name         string
+		Provider     AlertProvider
+		Alert        alert.Alert
+		Resolved     bool
+		ExpectedBody string
+	}{
+		{
+			Name:         "triggered",
+			Provider:     AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: 1},
+			Alert:        alert.Alert{Description: &firstDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     false,
+			ExpectedBody: "{\"topic\":\"example\",\"title\":\"Gatus\",\"message\":\"endpoint-name - description-1\",\"tags\":[\"x\"],\"priority\":1}",
+		},
+		{
+			Name:         "resolved",
+			Provider:     AlertProvider{URL: "https://ntfy.sh", Topic: "example", Priority: 2},
+			Alert:        alert.Alert{Description: &secondDescription, SuccessThreshold: 5, FailureThreshold: 3},
+			Resolved:     true,
+			ExpectedBody: "{\"topic\":\"example\",\"title\":\"Gatus\",\"message\":\"endpoint-name - description-2\",\"tags\":[\"white_check_mark\"],\"priority\":2}",
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			body := scenario.Provider.buildRequestBody(
+				&core.Endpoint{Name: "endpoint-name"},
+				&scenario.Alert,
+				&core.Result{
+					ConditionResults: []*core.ConditionResult{
+						{Condition: "[CONNECTED] == true", Success: scenario.Resolved},
+						{Condition: "[STATUS] == 200", Success: scenario.Resolved},
+					},
+				},
+				scenario.Resolved,
+			)
+			if string(body) != scenario.ExpectedBody {
+				t.Errorf("expected %s, got %s", scenario.ExpectedBody, body)
+			}
+			out := make(map[string]interface{})
+			if err := json.Unmarshal(body, &out); err != nil {
+				t.Error("expected body to be valid JSON, got error:", err.Error())
+			}
+		})
+	}
+}

alerting/provider/opsgenie/opsgenie.go

@@ -9,9 +9,9 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 const (

alerting/provider/opsgenie/opsgenie_test.go

@@ -5,10 +5,10 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {

alerting/provider/pagerduty/pagerduty.go

@@ -8,9 +8,9 @@ import (
 	"log"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 const (

alerting/provider/pagerduty/pagerduty_test.go

@@ -5,10 +5,10 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {

alerting/provider/provider.go

@@ -1,19 +1,22 @@
 package provider
 
 import (
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/alerting/provider/custom"
+	"github.com/TwiN/gatus/v4/alerting/provider/custom"
-	"github.com/TwiN/gatus/v3/alerting/provider/discord"
+	"github.com/TwiN/gatus/v4/alerting/provider/discord"
-	"github.com/TwiN/gatus/v3/alerting/provider/email"
+	"github.com/TwiN/gatus/v4/alerting/provider/email"
-	"github.com/TwiN/gatus/v3/alerting/provider/googlechat"
+	"github.com/TwiN/gatus/v4/alerting/provider/googlechat"
-	"github.com/TwiN/gatus/v3/alerting/provider/mattermost"
+	"github.com/TwiN/gatus/v4/alerting/provider/matrix"
-	"github.com/TwiN/gatus/v3/alerting/provider/messagebird"
+	"github.com/TwiN/gatus/v4/alerting/provider/mattermost"
-	"github.com/TwiN/gatus/v3/alerting/provider/pagerduty"
+	"github.com/TwiN/gatus/v4/alerting/provider/messagebird"
-	"github.com/TwiN/gatus/v3/alerting/provider/slack"
+	"github.com/TwiN/gatus/v4/alerting/provider/ntfy"
-	"github.com/TwiN/gatus/v3/alerting/provider/teams"
+	"github.com/TwiN/gatus/v4/alerting/provider/opsgenie"
-	"github.com/TwiN/gatus/v3/alerting/provider/telegram"
+	"github.com/TwiN/gatus/v4/alerting/provider/pagerduty"
-	"github.com/TwiN/gatus/v3/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v4/alerting/provider/slack"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/alerting/provider/teams"
+	"github.com/TwiN/gatus/v4/alerting/provider/telegram"
+	"github.com/TwiN/gatus/v4/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 // AlertProvider is the interface that each providers should implement
@@ -56,8 +59,11 @@ var (
 	_ AlertProvider = (*discord.AlertProvider)(nil)
 	_ AlertProvider = (*email.AlertProvider)(nil)
 	_ AlertProvider = (*googlechat.AlertProvider)(nil)
+	_ AlertProvider = (*matrix.AlertProvider)(nil)
 	_ AlertProvider = (*mattermost.AlertProvider)(nil)
 	_ AlertProvider = (*messagebird.AlertProvider)(nil)
+	_ AlertProvider = (*ntfy.AlertProvider)(nil)
+	_ AlertProvider = (*opsgenie.AlertProvider)(nil)
 	_ AlertProvider = (*pagerduty.AlertProvider)(nil)
 	_ AlertProvider = (*slack.AlertProvider)(nil)
 	_ AlertProvider = (*teams.AlertProvider)(nil)

alerting/provider/provider_test.go

@@ -3,7 +3,7 @@ package provider
 import (
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
 )
 
 func TestParseWithDefaultAlert(t *testing.T) {

alerting/provider/slack/slack.go

@@ -6,28 +6,44 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Slack
 type AlertProvider struct {
 	WebhookURL string `yaml:"webhook-url"` // Slack webhook URL
-
 	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
 	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group      string `yaml:"group"`
+	WebhookURL string `yaml:"webhook-url"`
 }
 
 // IsValid returns whether the provider's configuration is valid
 func (provider *AlertProvider) IsValid() bool {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.WebhookURL) == 0 {
+				return false
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
 	return len(provider.WebhookURL) > 0
 }
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
 	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
-	request, err := http.NewRequest(http.MethodPost, provider.WebhookURL, buffer)
+	request, err := http.NewRequest(http.MethodPost, provider.getWebhookURLForGroup(endpoint.Group), buffer)
 	if err != nil {
 		return err
 	}
@@ -86,6 +102,18 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 }`, message, description, color, results)
 }
 
+// getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group
+func (provider *AlertProvider) getWebhookURLForGroup(group string) string {
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				return override.WebhookURL
+			}
+		}
+	}
+	return provider.WebhookURL
+}
+
 // GetDefaultAlert returns the provider's default alert configuration
 func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
 	return provider.DefaultAlert

alerting/provider/slack/slack_test.go

@@ -5,13 +5,13 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
-func TestAlertProvider_IsValid(t *testing.T) {
+func TestAlertDefaultProvider_IsValid(t *testing.T) {
 	invalidProvider := AlertProvider{WebhookURL: ""}
 	if invalidProvider.IsValid() {
 		t.Error("provider shouldn't have been valid")
@@ -22,6 +22,43 @@ func TestAlertProvider_IsValid(t *testing.T) {
 	}
 }
 
+func TestAlertProvider_IsValidWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "",
+			},
+		},
+	}
+	if providerWithInvalidOverrideGroup.IsValid() {
+		t.Error("provider Group shouldn't have been valid")
+	}
+	providerWithInvalidOverrideTo := AlertProvider{
+		Overrides: []Override{
+			{
+				WebhookURL: "",
+				Group:      "group",
+			},
+		},
+	}
+	if providerWithInvalidOverrideTo.IsValid() {
+		t.Error("provider integration key shouldn't have been valid")
+	}
+	providerWithValidOverride := AlertProvider{
+		WebhookURL: "http://example.com",
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "group",
+			},
+		},
+	}
+	if !providerWithValidOverride.IsValid() {
+		t.Error("provider should've been valid")
+	}
+}
+
 func TestAlertProvider_Send(t *testing.T) {
 	defer client.InjectHTTPClient(nil)
 	firstDescription := "description-1"
@@ -79,7 +116,7 @@ func TestAlertProvider_Send(t *testing.T) {
 		t.Run(scenario.Name, func(t *testing.T) {
 			client.InjectHTTPClient(&http.Client{Transport: scenario.MockRoundTripper})
 			err := scenario.Provider.Send(
-				&core.Endpoint{Name: "name"},
+				&core.Endpoint{Name: "endpoint-name"},
 				&scenario.Alert,
 				&core.Result{
 					ConditionResults: []*core.ConditionResult{
@@ -175,3 +212,66 @@ func TestAlertProvider_GetDefaultAlert(t *testing.T) {
 		t.Error("expected default alert to be nil")
 	}
 }
+
+func TestAlertProvider_getWebhookURLForGroup(t *testing.T) {
+	tests := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		ExpectedOutput string
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example01.com",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.Name, func(t *testing.T) {
+			if got := tt.Provider.getWebhookURLForGroup(tt.InputGroup); got != tt.ExpectedOutput {
+				t.Errorf("AlertProvider.getWebhookURLForGroup() = %v, want %v", got, tt.ExpectedOutput)
+			}
+		})
+	}
+}

alerting/provider/teams/teams.go

@@ -6,9 +6,9 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Teams
@@ -17,17 +17,35 @@ type AlertProvider struct {
 
 	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
 	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
+
+	// Overrides is a list of Override that may be prioritized over the default configuration
+	Overrides []Override `yaml:"overrides,omitempty"`
+}
+
+// Override is a case under which the default integration is overridden
+type Override struct {
+	Group      string `yaml:"group"`
+	WebhookURL string `yaml:"webhook-url"`
 }
 
 // IsValid returns whether the provider's configuration is valid
 func (provider *AlertProvider) IsValid() bool {
+	registeredGroups := make(map[string]bool)
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.WebhookURL) == 0 {
+				return false
+			}
+			registeredGroups[override.Group] = true
+		}
+	}
 	return len(provider.WebhookURL) > 0
 }
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
 	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
-	request, err := http.NewRequest(http.MethodPost, provider.WebhookURL, buffer)
+	request, err := http.NewRequest(http.MethodPost, provider.getWebhookURLForGroup(endpoint.Group), buffer)
 	if err != nil {
 		return err
 	}
@@ -86,6 +104,18 @@ func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *
 }`, color, message, description, endpoint.URL, results)
 }
 
+// getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group
+func (provider *AlertProvider) getWebhookURLForGroup(group string) string {
+	if provider.Overrides != nil {
+		for _, override := range provider.Overrides {
+			if group == override.Group {
+				return override.WebhookURL
+			}
+		}
+	}
+	return provider.WebhookURL
+}
+
 // GetDefaultAlert returns the provider's default alert configuration
 func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
 	return provider.DefaultAlert

alerting/provider/teams/teams_test.go

@@ -5,13 +5,13 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
-func TestAlertProvider_IsValid(t *testing.T) {
+func TestAlertDefaultProvider_IsValid(t *testing.T) {
 	invalidProvider := AlertProvider{WebhookURL: ""}
 	if invalidProvider.IsValid() {
 		t.Error("provider shouldn't have been valid")
@@ -22,6 +22,43 @@ func TestAlertProvider_IsValid(t *testing.T) {
 	}
 }
 
+func TestAlertProvider_IsValidWithOverride(t *testing.T) {
+	providerWithInvalidOverrideGroup := AlertProvider{
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "",
+			},
+		},
+	}
+	if providerWithInvalidOverrideGroup.IsValid() {
+		t.Error("provider Group shouldn't have been valid")
+	}
+	providerWithInvalidOverrideTo := AlertProvider{
+		Overrides: []Override{
+			{
+				WebhookURL: "",
+				Group:      "group",
+			},
+		},
+	}
+	if providerWithInvalidOverrideTo.IsValid() {
+		t.Error("provider integration key shouldn't have been valid")
+	}
+	providerWithValidOverride := AlertProvider{
+		WebhookURL: "http://example.com",
+		Overrides: []Override{
+			{
+				WebhookURL: "http://example.com",
+				Group:      "group",
+			},
+		},
+	}
+	if !providerWithValidOverride.IsValid() {
+		t.Error("provider should've been valid")
+	}
+}
+
 func TestAlertProvider_Send(t *testing.T) {
 	defer client.InjectHTTPClient(nil)
 	firstDescription := "description-1"
@@ -156,3 +193,66 @@ func TestAlertProvider_GetDefaultAlert(t *testing.T) {
 		t.Error("expected default alert to be nil")
 	}
 }
+
+func TestAlertProvider_getWebhookURLForGroup(t *testing.T) {
+	tests := []struct {
+		Name           string
+		Provider       AlertProvider
+		InputGroup     string
+		ExpectedOutput string
+	}{
+		{
+			Name: "provider-no-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-no-override-specify-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides:  nil,
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-no-group-should-default",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "",
+			ExpectedOutput: "http://example.com",
+		},
+		{
+			Name: "provider-with-override-specify-group-should-override",
+			Provider: AlertProvider{
+				WebhookURL: "http://example.com",
+				Overrides: []Override{
+					{
+						Group:      "group",
+						WebhookURL: "http://example01.com",
+					},
+				},
+			},
+			InputGroup:     "group",
+			ExpectedOutput: "http://example01.com",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.Name, func(t *testing.T) {
+			if got := tt.Provider.getWebhookURLForGroup(tt.InputGroup); got != tt.ExpectedOutput {
+				t.Errorf("AlertProvider.getToForGroup() = %v, want %v", got, tt.ExpectedOutput)
+			}
+		})
+	}
+}

alerting/provider/telegram/telegram.go

@@ -6,15 +6,21 @@ import (
 	"io"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
+const defaultAPIURL = "https://api.telegram.org"
+
 // AlertProvider is the configuration necessary for sending an alert using Telegram
 type AlertProvider struct {
-	Token string `yaml:"token"`
+	Token  string `yaml:"token"`
-	ID    string `yaml:"id"`
+	ID     string `yaml:"id"`
+	APIURL string `yaml:"api-url"`
+
+	// ClientConfig is the configuration of the client used to communicate with the provider's target
+	ClientConfig *client.Config `yaml:"client,omitempty"`
 
 	// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
 	DefaultAlert *alert.Alert `yaml:"default-alert,omitempty"`
@@ -22,18 +28,25 @@ type AlertProvider struct {
 
 // IsValid returns whether the provider's configuration is valid
 func (provider *AlertProvider) IsValid() bool {
+	if provider.ClientConfig == nil {
+		provider.ClientConfig = client.GetDefaultConfig()
+	}
 	return len(provider.Token) > 0 && len(provider.ID) > 0
 }
 
 // Send an alert using the provider
 func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
 	buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
-	request, err := http.NewRequest(http.MethodPost, fmt.Sprintf("https://api.telegram.org/bot%s/sendMessage", provider.Token), buffer)
+	apiURL := provider.APIURL
+	if apiURL == "" {
+		apiURL = defaultAPIURL
+	}
+	request, err := http.NewRequest(http.MethodPost, fmt.Sprintf("%s/bot%s/sendMessage", apiURL, provider.Token), buffer)
 	if err != nil {
 		return err
 	}
 	request.Header.Set("Content-Type", "application/json")
-	response, err := client.GetHTTPClient(nil).Do(request)
+	response, err := client.GetHTTPClient(provider.ClientConfig).Do(request)
 	if err != nil {
 		return err
 	}

alerting/provider/telegram/telegram_test.go

@@ -5,21 +5,31 @@ import (
 	"net/http"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/test"
+	"github.com/TwiN/gatus/v4/test"
 )
 
 func TestAlertProvider_IsValid(t *testing.T) {
-	invalidProvider := AlertProvider{Token: "", ID: ""}
+	t.Run("invalid-provider", func(t *testing.T) {
-	if invalidProvider.IsValid() {
+		invalidProvider := AlertProvider{Token: "", ID: ""}
-		t.Error("provider shouldn't have been valid")
+		if invalidProvider.IsValid() {
-	}
+			t.Error("provider shouldn't have been valid")
-	validProvider := AlertProvider{Token: "123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11", ID: "12345678"}
+		}
-	if !validProvider.IsValid() {
+	})
-		t.Error("provider should've been valid")
+	t.Run("valid-provider", func(t *testing.T) {
-	}
+		validProvider := AlertProvider{Token: "123456:ABC-DEF1234ghIkl-zyx57W2v1u123ew11", ID: "12345678"}
+		if validProvider.ClientConfig != nil {
+			t.Error("provider client config should have been nil prior to IsValid() being executed")
+		}
+		if !validProvider.IsValid() {
+			t.Error("provider should've been valid")
+		}
+		if validProvider.ClientConfig == nil {
+			t.Error("provider client config should have been set after IsValid() was executed")
+		}
+	})
 }
 
 func TestAlertProvider_Send(t *testing.T) {

alerting/provider/twilio/twilio.go

@@ -8,9 +8,9 @@ import (
 	"net/http"
 	"net/url"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 // AlertProvider is the configuration necessary for sending an alert using Twilio

alerting/provider/twilio/twilio_test.go

@@ -3,8 +3,8 @@ package twilio
 import (
 	"testing"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 func TestTwilioAlertProvider_IsValid(t *testing.T) {

client/client.go

@@ -17,7 +17,7 @@ import (
 // injectedHTTPClient is used for testing purposes
 var injectedHTTPClient *http.Client
 
-// GetHTTPClient returns the shared HTTP client
+// GetHTTPClient returns the shared HTTP client, or the client from the configuration passed
 func GetHTTPClient(config *Config) *http.Client {
 	if injectedHTTPClient != nil {
 		return injectedHTTPClient

client/client_test.go

@@ -1,8 +1,13 @@
 package client
 
 import (
+	"bytes"
+	"io"
+	"net/http"
 	"testing"
 	"time"
+
+	"github.com/TwiN/gatus/v4/test"
 )
 
 func TestGetHTTPClient(t *testing.T) {
@@ -10,8 +15,18 @@ func TestGetHTTPClient(t *testing.T) {
 		Insecure:       false,
 		IgnoreRedirect: false,
 		Timeout:        0,
+		DNSResolver:    "tcp://1.1.1.1:53",
+		OAuth2Config: &OAuth2Config{
+			ClientID:     "00000000-0000-0000-0000-000000000000",
+			ClientSecret: "secretsauce",
+			TokenURL:     "https://token-server.local/token",
+			Scopes:       []string{"https://application.local/.default"},
+		},
+	}
+	err := cfg.ValidateAndSetDefaults()
+	if err != nil {
+		t.Errorf("expected error to be nil, but got: `%s`", err)
 	}
-	cfg.ValidateAndSetDefaults()
 	if GetHTTPClient(cfg) == nil {
 		t.Error("expected client to not be nil")
 	}
@@ -146,3 +161,61 @@ func TestCanCreateTCPConnection(t *testing.T) {
 		t.Error("should've failed, because there's no port in the address")
 	}
 }
+
+// This test checks if a HTTP client configured with `configureOAuth2()` automatically
+// performs a Client Credentials OAuth2 flow and adds the obtained token as a `Authorization`
+// header to all outgoing HTTP calls.
+func TestHttpClientProvidesOAuth2BearerToken(t *testing.T) {
+	defer InjectHTTPClient(nil)
+	oAuth2Config := &OAuth2Config{
+		ClientID:     "00000000-0000-0000-0000-000000000000",
+		ClientSecret: "secretsauce",
+		TokenURL:     "https://token-server.local/token",
+		Scopes:       []string{"https://application.local/.default"},
+	}
+	mockHttpClient := &http.Client{
+		Transport: test.MockRoundTripper(func(r *http.Request) *http.Response {
+			// if the mock HTTP client tries to get a token from the `token-server`
+			// we provide the expected token response
+			if r.Host == "token-server.local" {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body: io.NopCloser(bytes.NewReader(
+						[]byte(
+							`{"token_type":"Bearer","expires_in":3599,"ext_expires_in":3599,"access_token":"secret-token"}`,
+						),
+					)),
+				}
+			}
+			// to verify the headers were sent as expected, we echo them back in the
+			// `X-Org-Authorization` header and check if the token value matches our
+			// mocked `token-server` response
+			return &http.Response{
+				StatusCode: http.StatusOK,
+				Header: map[string][]string{
+					"X-Org-Authorization": {r.Header.Get("Authorization")},
+				},
+				Body: http.NoBody,
+			}
+		}),
+	}
+	mockHttpClientWithOAuth := configureOAuth2(mockHttpClient, *oAuth2Config)
+	InjectHTTPClient(mockHttpClientWithOAuth)
+	request, err := http.NewRequest(http.MethodPost, "http://127.0.0.1:8282", http.NoBody)
+	if err != nil {
+		t.Error("expected no error, got", err.Error())
+	}
+	response, err := mockHttpClientWithOAuth.Do(request)
+	if err != nil {
+		t.Error("expected no error, got", err.Error())
+	}
+	if response.Header == nil {
+		t.Error("expected response headers, but got nil")
+	}
+	// the mock response echos the Authorization header used in the request back
+	// to us as `X-Org-Authorization` header, we check here if the value matches
+	// our expected token `secret-token`
+	if response.Header.Get("X-Org-Authorization") != "Bearer secret-token" {
+		t.Error("exptected `secret-token` as Bearer token in the mocked response header `X-Org-Authorization`, but got", response.Header.Get("X-Org-Authorization"))
+	}
+}

client/config.go

@@ -1,9 +1,18 @@
 package client
 
 import (
+	"context"
 	"crypto/tls"
+	"errors"
+	"log"
+	"net"
 	"net/http"
+	"regexp"
+	"strconv"
 	"time"
+
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/clientcredentials"
 )
 
 const (
@@ -11,7 +20,10 @@ const (
 )
 
 var (
-	// DefaultConfig is the default client configuration
+	ErrInvalidDNSResolver        = errors.New("invalid DNS resolver specified. Required format is {proto}://{ip}:{port}")
+	ErrInvalidDNSResolverPort    = errors.New("invalid DNS resolver port")
+	ErrInvalidClientOAuth2Config = errors.New("invalid OAuth2 configuration, all fields are required")
+
 	defaultConfig = Config{
 		Insecure:       false,
 		IgnoreRedirect: false,
@@ -28,22 +40,99 @@ func GetDefaultConfig() *Config {
 // Config is the configuration for clients
 type Config struct {
 	// Insecure determines whether to skip verifying the server's certificate chain and host name
-	Insecure bool `yaml:"insecure"`
+	Insecure bool `yaml:"insecure,omitempty"`
 
 	// IgnoreRedirect determines whether to ignore redirects (true) or follow them (false, default)
-	IgnoreRedirect bool `yaml:"ignore-redirect"`
+	IgnoreRedirect bool `yaml:"ignore-redirect,omitempty"`
 
 	// Timeout for the client
 	Timeout time.Duration `yaml:"timeout"`
 
+	// DNSResolver override for the HTTP client
+	// Expected format is {protocol}://{host}:{port}, e.g. tcp://1.1.1.1:53
+	DNSResolver string `yaml:"dns-resolver,omitempty"`
+
+	// OAuth2Config is the OAuth2 configuration used for the client.
+	//
+	// If non-nil, the http.Client returned by getHTTPClient will automatically retrieve a token if necessary.
+	// See configureOAuth2 for more details.
+	OAuth2Config *OAuth2Config `yaml:"oauth2,omitempty"`
+
 	httpClient *http.Client
 }
 
+// DNSResolverConfig is the parsed configuration from the DNSResolver config string.
+type DNSResolverConfig struct {
+	Protocol string
+	Host     string
+	Port     string
+}
+
+// OAuth2Config is the configuration for the OAuth2 client credentials flow
+type OAuth2Config struct {
+	TokenURL     string   `yaml:"token-url"` // e.g. https://dev-12345678.okta.com/token
+	ClientID     string   `yaml:"client-id"`
+	ClientSecret string   `yaml:"client-secret"`
+	Scopes       []string `yaml:"scopes"` // e.g. ["openid"]
+}
+
 // ValidateAndSetDefaults validates the client configuration and sets the default values if necessary
-func (c *Config) ValidateAndSetDefaults() {
+func (c *Config) ValidateAndSetDefaults() error {
 	if c.Timeout < time.Millisecond {
 		c.Timeout = 10 * time.Second
 	}
+	if c.HasCustomDNSResolver() {
+		// Validate the DNS resolver now to make sure it will not return an error later.
+		if _, err := c.parseDNSResolver(); err != nil {
+			return err
+		}
+	}
+	if c.HasOAuth2Config() && !c.OAuth2Config.isValid() {
+		return ErrInvalidClientOAuth2Config
+	}
+	return nil
+}
+
+// HasCustomDNSResolver returns whether a custom DNSResolver is configured
+func (c *Config) HasCustomDNSResolver() bool {
+	return len(c.DNSResolver) > 0
+}
+
+// parseDNSResolver parses the DNS resolver into the DNSResolverConfig struct
+func (c *Config) parseDNSResolver() (*DNSResolverConfig, error) {
+	re := regexp.MustCompile(`^(?P<proto>(.*))://(?P<host>[A-Za-z0-9\-\.]+):(?P<port>[0-9]+)?(.*)$`)
+	matches := re.FindStringSubmatch(c.DNSResolver)
+	if len(matches) == 0 {
+		return nil, ErrInvalidDNSResolver
+	}
+	r := make(map[string]string)
+	for i, k := range re.SubexpNames() {
+		if i != 0 && k != "" {
+			r[k] = matches[i]
+		}
+	}
+	port, err := strconv.Atoi(r["port"])
+	if err != nil {
+		return nil, err
+	}
+	if port < 1 || port > 65535 {
+		return nil, ErrInvalidDNSResolverPort
+	}
+	return &DNSResolverConfig{
+		Protocol: r["proto"],
+		Host:     r["host"],
+		Port:     r["port"],
+	}, nil
+}
+
+// HasOAuth2Config returns true if the client has OAuth2 configuration parameters
+func (c *Config) HasOAuth2Config() bool {
+	return c.OAuth2Config != nil
+}
+
+// isValid() returns true if the OAuth2 configuration is valid
+func (c *OAuth2Config) isValid() bool {
+	return len(c.TokenURL) > 0 && len(c.ClientID) > 0 && len(c.ClientSecret) > 0 && len(c.Scopes) > 0
 }
 
 // GetHTTPClient return an HTTP client matching the Config's parameters.
@@ -68,6 +157,43 @@ func (c *Config) getHTTPClient() *http.Client {
 				return nil
 			},
 		}
+		if c.HasCustomDNSResolver() {
+			dnsResolver, err := c.parseDNSResolver()
+			if err != nil {
+				// We're ignoring the error, because it should have been validated on startup ValidateAndSetDefaults.
+				// It shouldn't happen, but if it does, we'll log it... Better safe than sorry ;)
+				log.Println("[client][getHTTPClient] THIS SHOULD NOT HAPPEN. Silently ignoring invalid DNS resolver due to error:", err.Error())
+			} else {
+				dialer := &net.Dialer{
+					Resolver: &net.Resolver{
+						PreferGo: true,
+						Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
+							d := net.Dialer{}
+							return d.DialContext(ctx, dnsResolver.Protocol, dnsResolver.Host+":"+dnsResolver.Port)
+						},
+					},
+				}
+				c.httpClient.Transport.(*http.Transport).DialContext = func(ctx context.Context, network, addr string) (net.Conn, error) {
+					return dialer.DialContext(ctx, network, addr)
+				}
+			}
+		}
+		if c.HasOAuth2Config() {
+			c.httpClient = configureOAuth2(c.httpClient, *c.OAuth2Config)
+		}
 	}
 	return c.httpClient
 }
+
+// configureOAuth2 returns an HTTP client that will obtain and refresh tokens as necessary.
+// The returned Client and its Transport should not be modified.
+func configureOAuth2(httpClient *http.Client, c OAuth2Config) *http.Client {
+	oauth2cfg := clientcredentials.Config{
+		ClientID:     c.ClientID,
+		ClientSecret: c.ClientSecret,
+		Scopes:       c.Scopes,
+		TokenURL:     c.TokenURL,
+	}
+	ctx := context.WithValue(context.Background(), oauth2.HTTPClient, httpClient)
+	return oauth2cfg.Client(ctx)
+}

client/config_test.go

@@ -35,3 +35,47 @@ func TestConfig_getHTTPClient(t *testing.T) {
 		t.Error("expected Config.IgnoreRedirect set to true to cause the HTTP client's CheckRedirect to return http.ErrUseLastResponse")
 	}
 }
+
+func TestConfig_ValidateAndSetDefaults_withCustomDNSResolver(t *testing.T) {
+	type args struct {
+		dnsResolver string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		wantErr bool
+	}{
+		{
+			name: "with-valid-resolver",
+			args: args{
+				dnsResolver: "tcp://1.1.1.1:53",
+			},
+			wantErr: false,
+		},
+		{
+			name: "with-invalid-resolver-port",
+			args: args{
+				dnsResolver: "tcp://127.0.0.1:99999",
+			},
+			wantErr: true,
+		},
+		{
+			name: "with-invalid-resolver-format",
+			args: args{
+				dnsResolver: "foobar",
+			},
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cfg := &Config{
+				DNSResolver: tt.args.dnsResolver,
+			}
+			err := cfg.ValidateAndSetDefaults()
+			if (err != nil) != tt.wantErr {
+				t.Errorf("ValidateAndSetDefaults() error=%v, wantErr=%v", err, tt.wantErr)
+			}
+		})
+	}
+}

config.yaml

@@ -31,7 +31,7 @@ endpoints:
       - "[STATUS] == 200"
 
   - name: example-dns-query
-    url: "8.8.8.8" # Address of the DNS server to use
+    url: "1.1.1.1" # Address of the DNS server to use
     interval: 5m
     dns:
       query-name: "example.com"
@@ -45,3 +45,9 @@ endpoints:
     interval: 1m
     conditions:
       - "[CONNECTED] == true"
+
+  - name: check-domain-expiration
+    url: "https://example.org/"
+    interval: 1h
+    conditions:
+      - "[DOMAIN_EXPIRATION] > 720h"

config/config.go

@@ -2,19 +2,22 @@ package config
 
 import (
 	"errors"
+	"fmt"
 	"log"
 	"os"
 	"time"
 
-	"github.com/TwiN/gatus/v3/alerting"
+	"github.com/TwiN/gatus/v4/alerting"
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/alerting/provider"
+	"github.com/TwiN/gatus/v4/alerting/provider"
-	"github.com/TwiN/gatus/v3/config/maintenance"
+	"github.com/TwiN/gatus/v4/config/maintenance"
-	"github.com/TwiN/gatus/v3/config/ui"
+	"github.com/TwiN/gatus/v4/config/remote"
-	"github.com/TwiN/gatus/v3/config/web"
+	"github.com/TwiN/gatus/v4/config/ui"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/config/web"
-	"github.com/TwiN/gatus/v3/security"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/storage"
+	"github.com/TwiN/gatus/v4/security"
+	"github.com/TwiN/gatus/v4/storage"
+	"github.com/TwiN/gatus/v4/util"
 	"gopkg.in/yaml.v2"
 )
 
@@ -85,10 +88,24 @@ type Config struct {
 	// Maintenance is the configuration for creating a maintenance window in which no alerts are sent
 	Maintenance *maintenance.Config `yaml:"maintenance,omitempty"`
 
+	// Remote is the configuration for remote Gatus instances
+	// WARNING: This is in ALPHA and may change or be completely removed in the future
+	Remote *remote.Config `yaml:"remote,omitempty"`
+
 	filePath        string    // path to the file from which config was loaded from
 	lastFileModTime time.Time // last modification time
 }
 
+func (config *Config) GetEndpointByKey(key string) *core.Endpoint {
+	for i := 0; i < len(config.Endpoints); i++ {
+		ep := config.Endpoints[i]
+		if util.ConvertGroupAndEndpointNameToKey(ep.Group, ep.Name) == key {
+			return ep
+		}
+	}
+	return nil
+}
+
 // HasLoadedConfigurationFileBeenModified returns whether the file that the
 // configuration has been loaded from has been modified since it was last read
 func (config Config) HasLoadedConfigurationFileBeenModified() bool {
@@ -185,10 +202,22 @@ func parseAndValidateConfigBytes(yamlBytes []byte) (config *Config, err error) {
 		if err := validateStorageConfig(config); err != nil {
 			return nil, err
 		}
+		if err := validateRemoteConfig(config); err != nil {
+			return nil, err
+		}
 	}
 	return
 }
 
+func validateRemoteConfig(config *Config) error {
+	if config.Remote != nil {
+		if err := config.Remote.ValidateAndSetDefaults(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func validateStorageConfig(config *Config) error {
 	if config.Storage == nil {
 		config.Storage = &storage.Config{
@@ -239,7 +268,7 @@ func validateEndpointsConfig(config *Config) error {
 			log.Printf("[config][validateEndpointsConfig] Validating endpoint '%s'", endpoint.Name)
 		}
 		if err := endpoint.ValidateAndSetDefaults(); err != nil {
-			return err
+			return fmt.Errorf("invalid endpoint %s: %s", endpoint.DisplayName(), err)
 		}
 	}
 	log.Printf("[config][validateEndpointsConfig] Validated %d endpoints", len(config.Endpoints))
@@ -273,9 +302,12 @@ func validateAlertingConfig(alertingConfig *alerting.Config, endpoints []*core.E
 	alertTypes := []alert.Type{
 		alert.TypeCustom,
 		alert.TypeDiscord,
+		alert.TypeGoogleChat,
 		alert.TypeEmail,
+		alert.TypeMatrix,
 		alert.TypeMattermost,
 		alert.TypeMessagebird,
+		alert.TypeNtfy,
 		alert.TypeOpsgenie,
 		alert.TypePagerDuty,
 		alert.TypeSlack,

config/config_test.go

@@ -5,22 +5,21 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v3/alerting"
+	"github.com/TwiN/gatus/v4/alerting"
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/alerting/provider/custom"
+	"github.com/TwiN/gatus/v4/alerting/provider/custom"
-	"github.com/TwiN/gatus/v3/alerting/provider/discord"
+	"github.com/TwiN/gatus/v4/alerting/provider/discord"
-	"github.com/TwiN/gatus/v3/alerting/provider/mattermost"
+	"github.com/TwiN/gatus/v4/alerting/provider/mattermost"
-	"github.com/TwiN/gatus/v3/alerting/provider/messagebird"
+	"github.com/TwiN/gatus/v4/alerting/provider/messagebird"
-	"github.com/TwiN/gatus/v3/alerting/provider/pagerduty"
+	"github.com/TwiN/gatus/v4/alerting/provider/pagerduty"
-	"github.com/TwiN/gatus/v3/alerting/provider/slack"
+	"github.com/TwiN/gatus/v4/alerting/provider/slack"
-	"github.com/TwiN/gatus/v3/alerting/provider/teams"
+	"github.com/TwiN/gatus/v4/alerting/provider/teams"
-	"github.com/TwiN/gatus/v3/alerting/provider/telegram"
+	"github.com/TwiN/gatus/v4/alerting/provider/telegram"
-	"github.com/TwiN/gatus/v3/alerting/provider/twilio"
+	"github.com/TwiN/gatus/v4/alerting/provider/twilio"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/config/ui"
+	"github.com/TwiN/gatus/v4/config/web"
-	"github.com/TwiN/gatus/v3/config/web"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/storage"
-	"github.com/TwiN/gatus/v3/storage"
 )
 
 func TestLoadFileThatDoesNotExist(t *testing.T) {
@@ -39,10 +38,6 @@ func TestLoadDefaultConfigurationFile(t *testing.T) {
 
 func TestParseAndValidateConfigBytes(t *testing.T) {
 	file := t.TempDir() + "/test.db"
-	ui.StaticFolder = "../web/static"
-	defer func() {
-		ui.StaticFolder = "./web/static"
-	}()
 	config, err := parseAndValidateConfigBytes([]byte(fmt.Sprintf(`
 storage:
   type: sqlite
@@ -53,7 +48,14 @@ maintenance:
   duration: 4h
   every: [Monday, Thursday]
 ui:
-  title: Test
+  title: T
+  header: H
+  link: https://example.org
+  buttons:
+    - name: "Home"
+      link: "https://example.org"
+    - name: "Status page"
+      link: "https://status.example.org"
 endpoints:
   - name: website
     url: https://twin.sh/health
@@ -88,8 +90,8 @@ endpoints:
 	if config.Storage == nil || config.Storage.Path != file || config.Storage.Type != storage.TypeSQLite {
 		t.Error("expected storage to be set to sqlite, got", config.Storage)
 	}
-	if config.UI == nil || config.UI.Title != "Test" {
+	if config.UI == nil || config.UI.Title != "T" || config.UI.Header != "H" || config.UI.Link != "https://example.org" || len(config.UI.Buttons) != 2 || config.UI.Buttons[0].Name != "Home" || config.UI.Buttons[0].Link != "https://example.org" || config.UI.Buttons[1].Name != "Status page" || config.UI.Buttons[1].Link != "https://status.example.org" {
-		t.Error("Expected Config.UI.Title to be Test")
+		t.Error("expected ui to be set to T, H, https://example.org, 2 buttons, Home and Status page, got", config.UI)
 	}
 	if mc := config.Maintenance; mc == nil || mc.Start != "00:00" || !mc.IsEnabled() || mc.Duration != 4*time.Hour || len(mc.Every) != 2 {
 		t.Error("Expected Config.Maintenance to be configured properly")
@@ -1118,7 +1120,7 @@ endpoints:
     conditions:
       - "[STATUS] == 200"
 `))
-	if err != core.ErrEndpointWithNoName {
+	if err == nil {
 		t.Error("should've returned an error")
 	}
 }
@@ -1203,7 +1205,7 @@ endpoints:
 		t.Errorf("config.Security.Basic.Username should've been %s, but was %s", expectedUsername, config.Security.Basic.Username)
 	}
 	if config.Security.Basic.PasswordBcryptHashBase64Encoded != expectedPasswordHash {
-		t.Errorf("config.Security.Basic.PasswordBcryptHashBase64Encoded should've been %s, but was %s", expectedPasswordHash, config.Security.Basic.PasswordSha512Hash)
+		t.Errorf("config.Security.Basic.PasswordBcryptHashBase64Encoded should've been %s, but was %s", expectedPasswordHash, config.Security.Basic.PasswordBcryptHashBase64Encoded)
 	}
 }
 
@@ -1302,53 +1304,3 @@ endpoints:
 		t.Error("services should've been merged in endpoints")
 	}
 }
-
-// XXX: Remove this in v4.0.0
-func TestParseAndValidateConfigBytes_backwardCompatibleWithStorageFile(t *testing.T) {
-	file := t.TempDir() + "/test.db"
-	config, err := parseAndValidateConfigBytes([]byte(fmt.Sprintf(`
-storage:
-  type: sqlite
-  file: %s
-
-endpoints:
-  - name: website
-    url: https://twin.sh/actuator/health
-    conditions:
-      - "[STATUS] == 200"
-`, file)))
-	if err != nil {
-		t.Error("expected no error, got", err.Error())
-	}
-	if config == nil {
-		t.Fatal("Config shouldn't have been nil")
-	}
-	if config.Storage == nil || config.Storage.Path != file || config.Storage.Type != storage.TypeSQLite {
-		t.Error("expected storage to be set to sqlite, got", config.Storage)
-	}
-}
-
-// XXX: Remove this in v4.0.0
-func TestParseAndValidateConfigBytes_backwardCompatibleWithStorageTypeMemoryAndFile(t *testing.T) {
-	file := t.TempDir() + "/test.db"
-	config, err := parseAndValidateConfigBytes([]byte(fmt.Sprintf(`
-storage:
-  type: memory
-  file: %s
-
-endpoints:
-  - name: website
-    url: https://twin.sh/actuator/health
-    conditions:
-      - "[STATUS] == 200"
-`, file)))
-	if err != nil {
-		t.Error("expected no error, got", err.Error())
-	}
-	if config == nil {
-		t.Fatal("Config shouldn't have been nil")
-	}
-	if config.Storage == nil || config.Storage.Path != file || config.Storage.Type != storage.TypeMemory {
-		t.Error("expected storage to be set to memory, got", config.Storage)
-	}
-}

config/maintenance/maintenance_test.go

@@ -98,6 +98,15 @@ func TestConfig_ValidateAndSetDefaults(t *testing.T) {
 			},
 			expectedError: nil,
 		},
+		{
+			name: "every-day-explicitly-at-2300",
+			cfg: &Config{
+				Start:    "23:00",
+				Duration: time.Hour,
+				Every:    []string{"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"},
+			},
+			expectedError: nil,
+		},
 		{
 			name: "every-monday-at-0000",
 			cfg: &Config{
@@ -168,6 +177,24 @@ func TestConfig_IsUnderMaintenance(t *testing.T) {
 			},
 			expected: true,
 		},
+		{
+			name: "under-maintenance-starting-now-for-8h-explicit-days",
+			cfg: &Config{
+				Start:    fmt.Sprintf("%02d:00", now.Hour()),
+				Duration: 8 * time.Hour,
+				Every:    []string{"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"},
+			},
+			expected: true,
+		},
+		{
+			name: "under-maintenance-starting-now-for-23h-explicit-days",
+			cfg: &Config{
+				Start:    fmt.Sprintf("%02d:00", now.Hour()),
+				Duration: 23 * time.Hour,
+				Every:    []string{"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"},
+			},
+			expected: true,
+		},
 		{
 			name: "under-maintenance-starting-4h-ago-for-8h",
 			cfg: &Config{
@@ -176,6 +203,14 @@ func TestConfig_IsUnderMaintenance(t *testing.T) {
 			},
 			expected: true,
 		},
+		{
+			name: "under-maintenance-starting-22h-ago-for-23h",
+			cfg: &Config{
+				Start:    fmt.Sprintf("%02d:00", normalizeHour(now.Hour()-22)),
+				Duration: 23 * time.Hour,
+			},
+			expected: true,
+		},
 		{
 			name: "under-maintenance-starting-4h-ago-for-3h",
 			cfg: &Config{

config/remote/remote.go

@@ -0,0 +1,39 @@
+package remote
+
+import (
+	"log"
+
+	"github.com/TwiN/gatus/v4/client"
+)
+
+// NOTICE: This is an experimental alpha feature and may be updated/removed in future versions.
+// For more information, see https://github.com/TwiN/gatus/issues/64
+
+type Config struct {
+	// Instances is a list of remote instances to retrieve endpoint statuses from.
+	Instances []Instance `yaml:"instances,omitempty"`
+
+	// ClientConfig is the configuration of the client used to communicate with the provider's target
+	ClientConfig *client.Config `yaml:"client,omitempty"`
+}
+
+type Instance struct {
+	EndpointPrefix string `yaml:"endpoint-prefix"`
+	URL            string `yaml:"url"`
+}
+
+func (c *Config) ValidateAndSetDefaults() error {
+	if c.ClientConfig == nil {
+		c.ClientConfig = client.GetDefaultConfig()
+	} else {
+		if err := c.ClientConfig.ValidateAndSetDefaults(); err != nil {
+			return err
+		}
+	}
+	if len(c.Instances) > 0 {
+		log.Println("WARNING: Your configuration is using 'remote', which is in alpha and may be updated/removed in future versions.")
+		log.Println("WARNING: See https://github.com/TwiN/gatus/issues/64 for more information")
+		log.Println("WARNING: This feature is a candidate for removal in future versions. Please comment on the issue above if you need this feature.")
+	}
+	return nil
+}

config/ui/ui.go

@@ -2,7 +2,10 @@ package ui
 
 import (
 	"bytes"
+	"errors"
 	"html/template"
+
+	"github.com/TwiN/gatus/v4/web"
 )
 
 const (
@@ -13,17 +16,30 @@ const (
 )
 
 var (
-	// StaticFolder is the path to the location of the static folder from the root path of the project
+	ErrButtonValidationFailed = errors.New("invalid button configuration: missing required name or link")
-	// The only reason this is exposed is to allow running tests from a different path than the root path of the project
-	StaticFolder = "./web/static"
 )
 
 // Config is the configuration for the UI of Gatus
 type Config struct {
-	Title  string `yaml:"title,omitempty"`  // Title of the page
+	Title   string   `yaml:"title,omitempty"`   // Title of the page
-	Header string `yaml:"header,omitempty"` // Header is the text at the top of the page
+	Header  string   `yaml:"header,omitempty"`  // Header is the text at the top of the page
-	Logo   string `yaml:"logo,omitempty"`   // Logo to display on the page
+	Logo    string   `yaml:"logo,omitempty"`    // Logo to display on the page
-	Link   string `yaml:"link,omitempty"`   // Link to open when clicking on the logo
+	Link    string   `yaml:"link,omitempty"`    // Link to open when clicking on the logo
+	Buttons []Button `yaml:"buttons,omitempty"` // Buttons to display below the header
+}
+
+// Button is the configuration for a button on the UI
+type Button struct {
+	Name string `yaml:"name,omitempty"` // Name is the text to display on the button
+	Link string `yaml:"link,omitempty"` // Link to open when the button is clicked.
+}
+
+// Validate validates the button configuration
+func (btn *Button) Validate() error {
+	if len(btn.Name) == 0 || len(btn.Link) == 0 {
+		return ErrButtonValidationFailed
+	}
+	return nil
 }
 
 // GetDefaultConfig returns a Config struct with the default values
@@ -47,7 +63,13 @@ func (cfg *Config) ValidateAndSetDefaults() error {
 	if len(cfg.Header) == 0 {
 		cfg.Header = defaultLink
 	}
-	t, err := template.ParseFiles(StaticFolder + "/index.html")
+	for _, btn := range cfg.Buttons {
+		if err := btn.Validate(); err != nil {
+			return err
+		}
+	}
+	// Validate that the template works
+	t, err := template.ParseFS(static.FileSystem, static.IndexPath)
 	if err != nil {
 		return err
 	}

config/ui/ui_test.go

@@ -1,14 +1,11 @@
 package ui
 
 import (
+	"strconv"
 	"testing"
 )
 
 func TestConfig_ValidateAndSetDefaults(t *testing.T) {
-	StaticFolder = "../../web/static"
-	defer func() {
-		StaticFolder = "./web/static"
-	}()
 	cfg := &Config{
 		Title:  "",
 		Header: "",
@@ -26,6 +23,45 @@ func TestConfig_ValidateAndSetDefaults(t *testing.T) {
 	}
 }
 
+func TestButton_Validate(t *testing.T) {
+	scenarios := []struct {
+		Name, Link    string
+		ExpectedError error
+	}{
+		{
+			Name:          "",
+			Link:          "",
+			ExpectedError: ErrButtonValidationFailed,
+		},
+		{
+			Name:          "",
+			Link:          "link",
+			ExpectedError: ErrButtonValidationFailed,
+		},
+		{
+			Name:          "name",
+			Link:          "",
+			ExpectedError: ErrButtonValidationFailed,
+		},
+		{
+			Name:          "name",
+			Link:          "link",
+			ExpectedError: nil,
+		},
+	}
+	for i, scenario := range scenarios {
+		t.Run(strconv.Itoa(i)+"_"+scenario.Name+"_"+scenario.Link, func(t *testing.T) {
+			button := &Button{
+				Name: scenario.Name,
+				Link: scenario.Link,
+			}
+			if err := button.Validate(); err != scenario.ExpectedError {
+				t.Errorf("expected error %v, got %v", scenario.ExpectedError, err)
+			}
+		})
+	}
+}
+
 func TestGetDefaultConfig(t *testing.T) {
 	defaultConfig := GetDefaultConfig()
 	if defaultConfig.Title != defaultTitle {

controller/controller.go

@@ -8,10 +8,8 @@ import (
 	"os"
 	"time"
 
-	"github.com/TwiN/gatus/v3/config/ui"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/config/web"
+	"github.com/TwiN/gatus/v4/controller/handler"
-	"github.com/TwiN/gatus/v3/controller/handler"
-	"github.com/TwiN/gatus/v3/security"
 )
 
 var (
@@ -21,19 +19,19 @@ var (
 )
 
 // Handle creates the router and starts the server
-func Handle(securityConfig *security.Config, webConfig *web.Config, uiConfig *ui.Config, enableMetrics bool) {
+func Handle(cfg *config.Config) {
-	var router http.Handler = handler.CreateRouter(ui.StaticFolder, securityConfig, uiConfig, enableMetrics)
+	var router http.Handler = handler.CreateRouter(cfg)
 	if os.Getenv("ENVIRONMENT") == "dev" {
 		router = handler.DevelopmentCORS(router)
 	}
 	server = &http.Server{
-		Addr:         fmt.Sprintf("%s:%d", webConfig.Address, webConfig.Port),
+		Addr:         fmt.Sprintf("%s:%d", cfg.Web.Address, cfg.Web.Port),
 		Handler:      router,
 		ReadTimeout:  15 * time.Second,
 		WriteTimeout: 15 * time.Second,
 		IdleTimeout:  15 * time.Second,
 	}
-	log.Println("[controller][Handle] Listening on " + webConfig.SocketAddress())
+	log.Println("[controller][Handle] Listening on " + cfg.Web.SocketAddress())
 	if os.Getenv("ROUTER_TEST") == "true" {
 		return
 	}

controller/controller_test.go

@@ -7,9 +7,9 @@ import (
 	"os"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/config"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/config/web"
+	"github.com/TwiN/gatus/v4/config/web"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
 )
 
 func TestHandle(t *testing.T) {
@@ -32,7 +32,7 @@ func TestHandle(t *testing.T) {
 	_ = os.Setenv("ROUTER_TEST", "true")
 	_ = os.Setenv("ENVIRONMENT", "dev")
 	defer os.Clearenv()
-	Handle(cfg.Security, cfg.Web, cfg.UI, cfg.Metrics)
+	Handle(cfg)
 	defer Shutdown()
 	request, _ := http.NewRequest("GET", "/health", http.NoBody)
 	responseRecorder := httptest.NewRecorder()

controller/handler/badge.go

@@ -7,8 +7,10 @@ import (
 	"strings"
 	"time"
 
-	"github.com/TwiN/gatus/v3/storage/store"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/storage/store/common"
+	"github.com/TwiN/gatus/v4/storage/store"
+	"github.com/TwiN/gatus/v4/storage/store/common"
+	"github.com/TwiN/gatus/v4/storage/store/common/paging"
 	"github.com/gorilla/mux"
 )
 
@@ -21,6 +23,16 @@ const (
 	badgeColorHexVeryBad  = "#c7130a"
 )
 
+const (
+	HealthStatusUp      = "up"
+	HealthStatusDown    = "down"
+	HealthStatusUnknown = "?"
+)
+
+var (
+	badgeColors = []string{badgeColorHexAwesome, badgeColorHexGreat, badgeColorHexGood, badgeColorHexPassable, badgeColorHexBad}
+)
+
 // UptimeBadge handles the automatic generation of badge based on the group name and endpoint name passed.
 //
 // Valid values for {duration}: 7d, 24h, 1h
@@ -61,23 +73,48 @@ func UptimeBadge(writer http.ResponseWriter, request *http.Request) {
 // ResponseTimeBadge handles the automatic generation of badge based on the group name and endpoint name passed.
 //
 // Valid values for {duration}: 7d, 24h, 1h
-func ResponseTimeBadge(writer http.ResponseWriter, request *http.Request) {
+func ResponseTimeBadge(config *config.Config) http.HandlerFunc {
-	variables := mux.Vars(request)
+	return func(writer http.ResponseWriter, request *http.Request) {
-	duration := variables["duration"]
+		variables := mux.Vars(request)
-	var from time.Time
+		duration := variables["duration"]
-	switch duration {
+		var from time.Time
-	case "7d":
+		switch duration {
-		from = time.Now().Add(-7 * 24 * time.Hour)
+		case "7d":
-	case "24h":
+			from = time.Now().Add(-7 * 24 * time.Hour)
-		from = time.Now().Add(-24 * time.Hour)
+		case "24h":
-	case "1h":
+			from = time.Now().Add(-24 * time.Hour)
-		from = time.Now().Add(-2 * time.Hour) // Because response time metrics are stored by hour, we have to cheat a little
+		case "1h":
-	default:
+			from = time.Now().Add(-2 * time.Hour) // Because response time metrics are stored by hour, we have to cheat a little
-		http.Error(writer, "Durations supported: 7d, 24h, 1h", http.StatusBadRequest)
+		default:
-		return
+			http.Error(writer, "Durations supported: 7d, 24h, 1h", http.StatusBadRequest)
+			return
+		}
+		key := variables["key"]
+		averageResponseTime, err := store.Get().GetAverageResponseTimeByKey(key, from, time.Now())
+		if err != nil {
+			if err == common.ErrEndpointNotFound {
+				http.Error(writer, err.Error(), http.StatusNotFound)
+			} else if err == common.ErrInvalidTimeRange {
+				http.Error(writer, err.Error(), http.StatusBadRequest)
+			} else {
+				http.Error(writer, err.Error(), http.StatusInternalServerError)
+			}
+			return
+		}
+		writer.Header().Set("Content-Type", "image/svg+xml")
+		writer.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
+		writer.Header().Set("Expires", "0")
+		writer.WriteHeader(http.StatusOK)
+		_, _ = writer.Write(generateResponseTimeBadgeSVG(duration, averageResponseTime, key, config))
 	}
+}
+
+// HealthBadge handles the automatic generation of badge based on the group name and endpoint name passed.
+func HealthBadge(writer http.ResponseWriter, request *http.Request) {
+	variables := mux.Vars(request)
 	key := variables["key"]
-	averageResponseTime, err := store.Get().GetAverageResponseTimeByKey(key, from, time.Now())
+	pagingConfig := paging.NewEndpointStatusParams()
+	status, err := store.Get().GetEndpointStatusByKey(key, pagingConfig.WithResults(1, 1))
 	if err != nil {
 		if err == common.ErrEndpointNotFound {
 			http.Error(writer, err.Error(), http.StatusNotFound)
@@ -88,11 +125,19 @@ func ResponseTimeBadge(writer http.ResponseWriter, request *http.Request) {
 		}
 		return
 	}
+	healthStatus := HealthStatusUnknown
+	if len(status.Results) > 0 {
+		if status.Results[0].Success {
+			healthStatus = HealthStatusUp
+		} else {
+			healthStatus = HealthStatusDown
+		}
+	}
 	writer.Header().Set("Content-Type", "image/svg+xml")
 	writer.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
 	writer.Header().Set("Expires", "0")
 	writer.WriteHeader(http.StatusOK)
-	_, _ = writer.Write(generateResponseTimeBadgeSVG(duration, averageResponseTime))
+	_, _ = writer.Write(generateHealthBadgeSVG(healthStatus))
 }
 
 func generateUptimeBadgeSVG(duration string, uptime float64) []byte {
@@ -161,7 +206,7 @@ func getBadgeColorFromUptime(uptime float64) string {
 	return badgeColorHexVeryBad
 }
 
-func generateResponseTimeBadgeSVG(duration string, averageResponseTime int) []byte {
+func generateResponseTimeBadgeSVG(duration string, averageResponseTime int, key string, cfg *config.Config) []byte {
 	var labelWidth, valueWidth int
 	switch duration {
 	case "7d":
@@ -172,7 +217,7 @@ func generateResponseTimeBadgeSVG(duration string, averageResponseTime int) []by
 		labelWidth = 105
 	default:
 	}
-	color := getBadgeColorFromResponseTime(averageResponseTime)
+	color := getBadgeColorFromResponseTime(averageResponseTime, key, cfg)
 	sanitizedValue := strconv.Itoa(averageResponseTime) + "ms"
 	valueWidth = len(sanitizedValue) * 11
 	width := labelWidth + valueWidth
@@ -209,17 +254,71 @@ func generateResponseTimeBadgeSVG(duration string, averageResponseTime int) []by
 	return svg
 }
 
-func getBadgeColorFromResponseTime(responseTime int) string {
+func getBadgeColorFromResponseTime(responseTime int, key string, cfg *config.Config) string {
-	if responseTime <= 50 {
+	endpoint := cfg.GetEndpointByKey(key)
-		return badgeColorHexAwesome
+	// the threshold config requires 5 values, so we can be sure it's set here
-	} else if responseTime <= 200 {
+	for i := 0; i < 5; i++ {
-		return badgeColorHexGreat
+		if responseTime <= endpoint.UIConfig.Badge.ResponseTime.Thresholds[i] {
-	} else if responseTime <= 300 {
+			return badgeColors[i]
-		return badgeColorHexGood
+		}
-	} else if responseTime <= 500 {
-		return badgeColorHexPassable
-	} else if responseTime <= 750 {
-		return badgeColorHexBad
 	}
 	return badgeColorHexVeryBad
 }
+
+func generateHealthBadgeSVG(healthStatus string) []byte {
+	var labelWidth, valueWidth int
+	switch healthStatus {
+	case HealthStatusUp:
+		valueWidth = 28
+	case HealthStatusDown:
+		valueWidth = 44
+	case HealthStatusUnknown:
+		valueWidth = 10
+	default:
+	}
+	color := getBadgeColorFromHealth(healthStatus)
+	labelWidth = 48
+
+	width := labelWidth + valueWidth
+	labelX := labelWidth / 2
+	valueX := labelWidth + (valueWidth / 2)
+	svg := []byte(fmt.Sprintf(`<svg xmlns="http://www.w3.org/2000/svg" width="%d" height="20">
+  <linearGradient id="b" x2="0" y2="100%%">
+    <stop offset="0" stop-color="#bbb" stop-opacity=".1"/>
+    <stop offset="1" stop-opacity=".1"/>
+  </linearGradient>
+  <mask id="a">
+    <rect width="%d" height="20" rx="3" fill="#fff"/>
+  </mask>
+  <g mask="url(#a)">
+    <path fill="#555" d="M0 0h%dv20H0z"/>
+    <path fill="%s" d="M%d 0h%dv20H%dz"/>
+    <path fill="url(#b)" d="M0 0h%dv20H0z"/>
+  </g>
+  <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">
+    <text x="%d" y="15" fill="#010101" fill-opacity=".3">
+      health
+    </text>
+    <text x="%d" y="14">
+      health
+    </text>
+    <text x="%d" y="15" fill="#010101" fill-opacity=".3">
+      %s
+    </text>
+    <text x="%d" y="14">
+      %s
+    </text>
+  </g>
+</svg>`, width, width, labelWidth, color, labelWidth, valueWidth, labelWidth, width, labelX, labelX, valueX, healthStatus, valueX, healthStatus))
+
+	return svg
+}
+
+func getBadgeColorFromHealth(healthStatus string) string {
+	if healthStatus == HealthStatusUp {
+		return badgeColorHexAwesome
+	} else if healthStatus == HealthStatusDown {
+		return badgeColorHexVeryBad
+	}
+	return badgeColorHexPassable
+}

controller/handler/badge_test.go

@@ -7,13 +7,14 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v3/config"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/storage/store"
+	"github.com/TwiN/gatus/v4/core/ui"
-	"github.com/TwiN/gatus/v3/watchdog"
+	"github.com/TwiN/gatus/v4/storage/store"
+	"github.com/TwiN/gatus/v4/watchdog"
 )
 
-func TestUptimeBadge(t *testing.T) {
+func TestBadge(t *testing.T) {
 	defer store.Get().Clear()
 	defer cache.Clear()
 	cfg := &config.Config{
@@ -29,9 +30,39 @@ func TestUptimeBadge(t *testing.T) {
 			},
 		},
 	}
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &core.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
+
-	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &core.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
+	testSuccessfulResult = core.Result{
-	router := CreateRouter("../../web/static", cfg.Security, nil, cfg.Metrics)
+		Hostname:              "example.org",
+		IP:                    "127.0.0.1",
+		HTTPStatus:            200,
+		Errors:                nil,
+		Connected:             true,
+		Success:               true,
+		Timestamp:             timestamp,
+		Duration:              150 * time.Millisecond,
+		CertificateExpiration: 10 * time.Hour,
+		ConditionResults: []*core.ConditionResult{
+			{
+				Condition: "[STATUS] == 200",
+				Success:   true,
+			},
+			{
+				Condition: "[RESPONSE_TIME] < 500",
+				Success:   true,
+			},
+			{
+				Condition: "[CERTIFICATE_EXPIRATION] < 72h",
+				Success:   true,
+			},
+		},
+	}
+
+	cfg.Endpoints[0].UIConfig = ui.GetDefaultConfig()
+	cfg.Endpoints[1].UIConfig = ui.GetDefaultConfig()
+
+	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &core.Result{Success: true, Connected: true, Duration: time.Millisecond, Timestamp: time.Now()})
+	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &core.Result{Success: false, Connected: false, Duration: time.Second, Timestamp: time.Now()})
+	router := CreateRouter(cfg)
 	type Scenario struct {
 		Name         string
 		Path         string
@@ -89,20 +120,35 @@ func TestUptimeBadge(t *testing.T) {
 			Path:         "/api/v1/endpoints/invalid_key/response-times/7d/badge.svg",
 			ExpectedCode: http.StatusNotFound,
 		},
+		{
+			Name:         "badge-health-up",
+			Path:         "/api/v1/endpoints/core_frontend/health/badge.svg",
+			ExpectedCode: http.StatusOK,
+		},
+		{
+			Name:         "badge-health-down",
+			Path:         "/api/v1/endpoints/core_backend/health/badge.svg",
+			ExpectedCode: http.StatusOK,
+		},
+		{
+			Name:         "badge-health-for-invalid-key",
+			Path:         "/api/v1/endpoints/invalid_key/health/badge.svg",
+			ExpectedCode: http.StatusNotFound,
+		},
 		{
 			Name:         "chart-response-time-24h",
 			Path:         "/api/v1/endpoints/core_backend/response-times/24h/chart.svg",
 			ExpectedCode: http.StatusOK,
 		},
-		{ // XXX: Remove this in v4.0.0
+		{
-			Name:         "backward-compatible-services-badge-uptime-1h",
+			Name:         "chart-response-time-7d",
-			Path:         "/api/v1/services/core_frontend/uptimes/1h/badge.svg",
+			Path:         "/api/v1/endpoints/core_frontend/response-times/7d/chart.svg",
 			ExpectedCode: http.StatusOK,
 		},
-		{ // XXX: Remove this in v4.0.0
+		{
-			Name:         "backward-compatible-services-chart-response-time-24h",
+			Name:         "chart-response-time-with-invalid-duration",
-			Path:         "/api/v1/services/core_backend/response-times/24h/chart.svg",
+			Path:         "/api/v1/endpoints/core_backend/response-times/3d/chart.svg",
-			ExpectedCode: http.StatusOK,
+			ExpectedCode: http.StatusBadRequest,
 		},
 	}
 	for _, scenario := range scenarios {
@@ -176,55 +222,155 @@ func TestGetBadgeColorFromUptime(t *testing.T) {
 }
 
 func TestGetBadgeColorFromResponseTime(t *testing.T) {
+	defer store.Get().Clear()
+	defer cache.Clear()
+
+	var (
+		firstCondition  = core.Condition("[STATUS] == 200")
+		secondCondition = core.Condition("[RESPONSE_TIME] < 500")
+		thirdCondition  = core.Condition("[CERTIFICATE_EXPIRATION] < 72h")
+	)
+
+	firstTestEndpoint := core.Endpoint{
+		Name:                    "a",
+		URL:                     "https://example.org/what/ever",
+		Method:                  "GET",
+		Body:                    "body",
+		Interval:                30 * time.Second,
+		Conditions:              []core.Condition{firstCondition, secondCondition, thirdCondition},
+		Alerts:                  nil,
+		NumberOfFailuresInARow:  0,
+		NumberOfSuccessesInARow: 0,
+		UIConfig:                ui.GetDefaultConfig(),
+	}
+	secondTestEndpoint := core.Endpoint{
+		Name:                    "b",
+		URL:                     "https://example.org/what/ever",
+		Method:                  "GET",
+		Body:                    "body",
+		Interval:                30 * time.Second,
+		Conditions:              []core.Condition{firstCondition, secondCondition, thirdCondition},
+		Alerts:                  nil,
+		NumberOfFailuresInARow:  0,
+		NumberOfSuccessesInARow: 0,
+		UIConfig: &ui.Config{
+			Badge: &ui.Badge{
+				ResponseTime: &ui.ResponseTime{
+					Thresholds: []int{100, 500, 1000, 2000, 3000},
+				},
+			},
+		},
+	}
+	cfg := &config.Config{
+		Metrics:   true,
+		Endpoints: []*core.Endpoint{&firstTestEndpoint, &secondTestEndpoint},
+	}
+
+	store.Get().Insert(&firstTestEndpoint, &testSuccessfulResult)
+	store.Get().Insert(&secondTestEndpoint, &testSuccessfulResult)
+
 	scenarios := []struct {
+		Key           string
 		ResponseTime  int
 		ExpectedColor string
 	}{
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  10,
 			ExpectedColor: badgeColorHexAwesome,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  50,
 			ExpectedColor: badgeColorHexAwesome,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  75,
 			ExpectedColor: badgeColorHexGreat,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  150,
 			ExpectedColor: badgeColorHexGreat,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  201,
 			ExpectedColor: badgeColorHexGood,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  300,
 			ExpectedColor: badgeColorHexGood,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  301,
 			ExpectedColor: badgeColorHexPassable,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  450,
 			ExpectedColor: badgeColorHexPassable,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  700,
 			ExpectedColor: badgeColorHexBad,
 		},
 		{
+			Key:           firstTestEndpoint.Key(),
 			ResponseTime:  1500,
 			ExpectedColor: badgeColorHexVeryBad,
 		},
+		{
+			Key:           secondTestEndpoint.Key(),
+			ResponseTime:  50,
+			ExpectedColor: badgeColorHexAwesome,
+		},
+		{
+			Key:           secondTestEndpoint.Key(),
+			ResponseTime:  1500,
+			ExpectedColor: badgeColorHexPassable,
+		},
+		{
+			Key:           secondTestEndpoint.Key(),
+			ResponseTime:  2222,
+			ExpectedColor: badgeColorHexBad,
+		},
 	}
 	for _, scenario := range scenarios {
-		t.Run("response-time-"+strconv.Itoa(scenario.ResponseTime), func(t *testing.T) {
+		t.Run(scenario.Key+"-response-time-"+strconv.Itoa(scenario.ResponseTime), func(t *testing.T) {
-			if getBadgeColorFromResponseTime(scenario.ResponseTime) != scenario.ExpectedColor {
+			if getBadgeColorFromResponseTime(scenario.ResponseTime, scenario.Key, cfg) != scenario.ExpectedColor {
-				t.Errorf("expected %s from %d, got %v", scenario.ExpectedColor, scenario.ResponseTime, getBadgeColorFromResponseTime(scenario.ResponseTime))
+				t.Errorf("expected %s from %d, got %v", scenario.ExpectedColor, scenario.ResponseTime, getBadgeColorFromResponseTime(scenario.ResponseTime, scenario.Key, cfg))
+			}
+		})
+	}
+}
+
+func TestGetBadgeColorFromHealth(t *testing.T) {
+	scenarios := []struct {
+		HealthStatus  string
+		ExpectedColor string
+	}{
+		{
+			HealthStatus:  HealthStatusUp,
+			ExpectedColor: badgeColorHexAwesome,
+		},
+		{
+			HealthStatus:  HealthStatusDown,
+			ExpectedColor: badgeColorHexVeryBad,
+		},
+		{
+			HealthStatus:  HealthStatusUnknown,
+			ExpectedColor: badgeColorHexPassable,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run("health-"+scenario.HealthStatus, func(t *testing.T) {
+			if getBadgeColorFromHealth(scenario.HealthStatus) != scenario.ExpectedColor {
+				t.Errorf("expected %s from %s, got %v", scenario.ExpectedColor, scenario.HealthStatus, getBadgeColorFromHealth(scenario.HealthStatus))
 			}
 		})
 	}

controller/handler/chart.go

@@ -7,8 +7,8 @@ import (
 	"sort"
 	"time"
 
-	"github.com/TwiN/gatus/v3/storage/store"
+	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v3/storage/store/common"
+	"github.com/TwiN/gatus/v4/storage/store/common"
 	"github.com/gorilla/mux"
 	"github.com/wcharczuk/go-chart/v2"
 	"github.com/wcharczuk/go-chart/v2/drawing"

controller/handler/chart_test.go

@@ -6,10 +6,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v3/config"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/storage/store"
+	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v3/watchdog"
+	"github.com/TwiN/gatus/v4/watchdog"
 )
 
 func TestResponseTimeChart(t *testing.T) {
@@ -30,7 +30,7 @@ func TestResponseTimeChart(t *testing.T) {
 	}
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &core.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &core.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
-	router := CreateRouter("../../web/static", cfg.Security, nil, cfg.Metrics)
+	router := CreateRouter(cfg)
 	type Scenario struct {
 		Name         string
 		Path         string
@@ -58,11 +58,6 @@ func TestResponseTimeChart(t *testing.T) {
 			Path:         "/api/v1/endpoints/invalid_key/response-times/7d/chart.svg",
 			ExpectedCode: http.StatusNotFound,
 		},
-		{ // XXX: Remove this in v4.0.0
-			Name:         "backward-compatible-services-chart-response-time-24h",
-			Path:         "/api/v1/services/core_backend/response-times/24h/chart.svg",
-			ExpectedCode: http.StatusOK,
-		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {

controller/handler/config.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/security"
+	"github.com/TwiN/gatus/v4/security"
 )
 
 // ConfigHandler is a handler that returns information for the front end of the application.

controller/handler/config_test.go

@@ -5,7 +5,7 @@ import (
 	"net/http/httptest"
 	"testing"
 
-	"github.com/TwiN/gatus/v3/security"
+	"github.com/TwiN/gatus/v4/security"
 	"github.com/gorilla/mux"
 )
 

controller/handler/endpoint_status.go

@@ -5,15 +5,20 @@ import (
 	"compress/gzip"
 	"encoding/json"
 	"fmt"
+	"io"
 	"log"
 	"net/http"
 	"strings"
 	"time"
 
-	"github.com/TwiN/gatus/v3/storage/store"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/storage/store/common"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/storage/store/common/paging"
+	"github.com/TwiN/gatus/v4/config/remote"
-	"github.com/TwiN/gocache"
+	"github.com/TwiN/gatus/v4/core"
+	"github.com/TwiN/gatus/v4/storage/store"
+	"github.com/TwiN/gatus/v4/storage/store/common"
+	"github.com/TwiN/gatus/v4/storage/store/common/paging"
+	"github.com/TwiN/gocache/v2"
 	"github.com/gorilla/mux"
 )
 
@@ -28,48 +33,89 @@ var (
 // EndpointStatuses handles requests to retrieve all EndpointStatus
 // Due to the size of the response, this function leverages a cache.
 // Must not be wrapped by GzipHandler
-func EndpointStatuses(writer http.ResponseWriter, r *http.Request) {
+func EndpointStatuses(cfg *config.Config) http.HandlerFunc {
-	page, pageSize := extractPageAndPageSizeFromRequest(r)
+	return func(writer http.ResponseWriter, r *http.Request) {
-	gzipped := strings.Contains(r.Header.Get("Accept-Encoding"), "gzip")
+		page, pageSize := extractPageAndPageSizeFromRequest(r)
-	var exists bool
+		gzipped := strings.Contains(r.Header.Get("Accept-Encoding"), "gzip")
-	var value interface{}
+		var exists bool
-	if gzipped {
+		var value interface{}
-		writer.Header().Set("Content-Encoding", "gzip")
-		value, exists = cache.Get(fmt.Sprintf("endpoint-status-%d-%d-gzipped", page, pageSize))
-	} else {
-		value, exists = cache.Get(fmt.Sprintf("endpoint-status-%d-%d", page, pageSize))
-	}
-	var data []byte
-	if !exists {
-		var err error
-		buffer := &bytes.Buffer{}
-		gzipWriter := gzip.NewWriter(buffer)
-		endpointStatuses, err := store.Get().GetAllEndpointStatuses(paging.NewEndpointStatusParams().WithResults(page, pageSize))
-		if err != nil {
-			log.Printf("[handler][EndpointStatuses] Failed to retrieve endpoint statuses: %s", err.Error())
-			http.Error(writer, err.Error(), http.StatusInternalServerError)
-			return
-		}
-		data, err = json.Marshal(endpointStatuses)
-		if err != nil {
-			log.Printf("[handler][EndpointStatuses] Unable to marshal object to JSON: %s", err.Error())
-			http.Error(writer, "unable to marshal object to JSON", http.StatusInternalServerError)
-			return
-		}
-		_, _ = gzipWriter.Write(data)
-		_ = gzipWriter.Close()
-		gzippedData := buffer.Bytes()
-		cache.SetWithTTL(fmt.Sprintf("endpoint-status-%d-%d", page, pageSize), data, cacheTTL)
-		cache.SetWithTTL(fmt.Sprintf("endpoint-status-%d-%d-gzipped", page, pageSize), gzippedData, cacheTTL)
 		if gzipped {
-			data = gzippedData
+			writer.Header().Set("Content-Encoding", "gzip")
+			value, exists = cache.Get(fmt.Sprintf("endpoint-status-%d-%d-gzipped", page, pageSize))
+		} else {
+			value, exists = cache.Get(fmt.Sprintf("endpoint-status-%d-%d", page, pageSize))
 		}
-	} else {
+		var data []byte
-		data = value.([]byte)
+		if !exists {
+			var err error
+			buffer := &bytes.Buffer{}
+			gzipWriter := gzip.NewWriter(buffer)
+			endpointStatuses, err := store.Get().GetAllEndpointStatuses(paging.NewEndpointStatusParams().WithResults(page, pageSize))
+			if err != nil {
+				log.Printf("[handler][EndpointStatuses] Failed to retrieve endpoint statuses: %s", err.Error())
+				http.Error(writer, err.Error(), http.StatusInternalServerError)
+				return
+			}
+			// ALPHA: Retrieve endpoint statuses from remote instances
+			if endpointStatusesFromRemote, err := getEndpointStatusesFromRemoteInstances(cfg.Remote); err != nil {
+				log.Printf("[handler][EndpointStatuses] Silently failed to retrieve endpoint statuses from remote: %s", err.Error())
+			} else if endpointStatusesFromRemote != nil {
+				endpointStatuses = append(endpointStatuses, endpointStatusesFromRemote...)
+			}
+			// Marshal endpoint statuses to JSON
+			data, err = json.Marshal(endpointStatuses)
+			if err != nil {
+				log.Printf("[handler][EndpointStatuses] Unable to marshal object to JSON: %s", err.Error())
+				http.Error(writer, "unable to marshal object to JSON", http.StatusInternalServerError)
+				return
+			}
+			_, _ = gzipWriter.Write(data)
+			_ = gzipWriter.Close()
+			gzippedData := buffer.Bytes()
+			cache.SetWithTTL(fmt.Sprintf("endpoint-status-%d-%d", page, pageSize), data, cacheTTL)
+			cache.SetWithTTL(fmt.Sprintf("endpoint-status-%d-%d-gzipped", page, pageSize), gzippedData, cacheTTL)
+			if gzipped {
+				data = gzippedData
+			}
+		} else {
+			data = value.([]byte)
+		}
+		writer.Header().Add("Content-Type", "application/json")
+		writer.WriteHeader(http.StatusOK)
+		_, _ = writer.Write(data)
 	}
-	writer.Header().Add("Content-Type", "application/json")
+}
-	writer.WriteHeader(http.StatusOK)
+
-	_, _ = writer.Write(data)
+func getEndpointStatusesFromRemoteInstances(remoteConfig *remote.Config) ([]*core.EndpointStatus, error) {
+	if remoteConfig == nil || len(remoteConfig.Instances) == 0 {
+		return nil, nil
+	}
+	var endpointStatusesFromAllRemotes []*core.EndpointStatus
+	httpClient := client.GetHTTPClient(remoteConfig.ClientConfig)
+	for _, instance := range remoteConfig.Instances {
+		response, err := httpClient.Get(instance.URL)
+		if err != nil {
+			return nil, err
+		}
+		body, err := io.ReadAll(response.Body)
+		if err != nil {
+			_ = response.Body.Close()
+			log.Printf("[handler][getEndpointStatusesFromRemoteInstances] Silently failed to retrieve endpoint statuses from %s: %s", instance.URL, err.Error())
+			continue
+		}
+		var endpointStatuses []*core.EndpointStatus
+		if err = json.Unmarshal(body, &endpointStatuses); err != nil {
+			_ = response.Body.Close()
+			log.Printf("[handler][getEndpointStatusesFromRemoteInstances] Silently failed to retrieve endpoint statuses from %s: %s", instance.URL, err.Error())
+			continue
+		}
+		_ = response.Body.Close()
+		for _, endpointStatus := range endpointStatuses {
+			endpointStatus.Name = instance.EndpointPrefix + endpointStatus.Name
+		}
+		endpointStatusesFromAllRemotes = append(endpointStatusesFromAllRemotes, endpointStatuses...)
+	}
+	return endpointStatusesFromAllRemotes, nil
 }
 
 // EndpointStatus retrieves a single core.EndpointStatus by group and endpoint name

controller/handler/endpoint_status_test.go

@@ -6,17 +6,13 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v3/config"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/storage/store"
+	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v3/watchdog"
+	"github.com/TwiN/gatus/v4/watchdog"
 )
 
 var (
-	firstCondition  = core.Condition("[STATUS] == 200")
-	secondCondition = core.Condition("[RESPONSE_TIME] < 500")
-	thirdCondition  = core.Condition("[CERTIFICATE_EXPIRATION] < 72h")
-
 	timestamp = time.Now()
 
 	testEndpoint = core.Endpoint{
@@ -26,7 +22,7 @@ var (
 		Method:                  "GET",
 		Body:                    "body",
 		Interval:                30 * time.Second,
-		Conditions:              []*core.Condition{&firstCondition, &secondCondition, &thirdCondition},
+		Conditions:              []core.Condition{core.Condition("[STATUS] == 200"), core.Condition("[RESPONSE_TIME] < 500"), core.Condition("[CERTIFICATE_EXPIRATION] < 72h")},
 		Alerts:                  nil,
 		NumberOfFailuresInARow:  0,
 		NumberOfSuccessesInARow: 0,
@@ -101,7 +97,7 @@ func TestEndpointStatus(t *testing.T) {
 	}
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &core.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &core.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
-	router := CreateRouter("../../web/static", cfg.Security, nil, cfg.Metrics)
+	router := CreateRouter(cfg)
 
 	type Scenario struct {
 		Name         string
@@ -131,11 +127,6 @@ func TestEndpointStatus(t *testing.T) {
 			Path:         "/api/v1/endpoints/invalid_key/statuses",
 			ExpectedCode: http.StatusNotFound,
 		},
-		{ // XXX: Remove this in v4.0.0
-			Name:         "backward-compatible-service-status",
-			Path:         "/api/v1/services/core_frontend/statuses",
-			ExpectedCode: http.StatusOK,
-		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {
@@ -162,7 +153,7 @@ func TestEndpointStatuses(t *testing.T) {
 	// Can't be bothered dealing with timezone issues on the worker that runs the automated tests
 	firstResult.Timestamp = time.Time{}
 	secondResult.Timestamp = time.Time{}
-	router := CreateRouter("../../web/static", nil, nil, false)
+	router := CreateRouter(&config.Config{Metrics: true})
 
 	type Scenario struct {
 		Name         string
@@ -201,12 +192,6 @@ func TestEndpointStatuses(t *testing.T) {
 			ExpectedCode: http.StatusOK,
 			ExpectedBody: `[{"name":"name","group":"group","key":"group_name","results":[{"status":200,"hostname":"example.org","duration":150000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":true},{"condition":"[CERTIFICATE_EXPIRATION] \u003c 72h","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"},{"status":200,"hostname":"example.org","duration":750000000,"errors":["error-1","error-2"],"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":false},{"condition":"[CERTIFICATE_EXPIRATION] \u003c 72h","success":false}],"success":false,"timestamp":"0001-01-01T00:00:00Z"}]}]`,
 		},
-		{ // XXX: Remove this in v4.0.0
-			Name:         "backward-compatible-service-status",
-			Path:         "/api/v1/services/statuses",
-			ExpectedCode: http.StatusOK,
-			ExpectedBody: `[{"name":"name","group":"group","key":"group_name","results":[{"status":200,"hostname":"example.org","duration":150000000,"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":true},{"condition":"[CERTIFICATE_EXPIRATION] \u003c 72h","success":true}],"success":true,"timestamp":"0001-01-01T00:00:00Z"},{"status":200,"hostname":"example.org","duration":750000000,"errors":["error-1","error-2"],"conditionResults":[{"condition":"[STATUS] == 200","success":true},{"condition":"[RESPONSE_TIME] \u003c 500","success":false},{"condition":"[CERTIFICATE_EXPIRATION] \u003c 72h","success":false}],"success":false,"timestamp":"0001-01-01T00:00:00Z"}]}]`,
-		},
 	}
 
 	for _, scenario := range scenarios {

controller/handler/favicon.go

@@ -1,12 +0,0 @@
-package handler
-
-import (
-	"net/http"
-)
-
-// FavIcon handles requests for /favicon.ico
-func FavIcon(staticFolder string) http.HandlerFunc {
-	return func(writer http.ResponseWriter, request *http.Request) {
-		http.ServeFile(writer, request, staticFolder+"/favicon.ico")
-	}
-}

controller/handler/favicon_test.go

@@ -1,33 +0,0 @@
-package handler
-
-import (
-	"net/http"
-	"net/http/httptest"
-	"testing"
-)
-
-func TestFavIcon(t *testing.T) {
-	router := CreateRouter("../../web/static", nil, nil, false)
-	type Scenario struct {
-		Name         string
-		Path         string
-		ExpectedCode int
-	}
-	scenarios := []Scenario{
-		{
-			Name:         "favicon",
-			Path:         "/favicon.ico",
-			ExpectedCode: http.StatusOK,
-		},
-	}
-	for _, scenario := range scenarios {
-		t.Run(scenario.Name, func(t *testing.T) {
-			request, _ := http.NewRequest("GET", scenario.Path, http.NoBody)
-			responseRecorder := httptest.NewRecorder()
-			router.ServeHTTP(responseRecorder, request)
-			if responseRecorder.Code != scenario.ExpectedCode {
-				t.Errorf("%s %s should have returned %d, but returned %d instead", request.Method, request.URL, scenario.ExpectedCode, responseRecorder.Code)
-			}
-		})
-	}
-}

controller/handler/handler.go

@@ -1,53 +1,50 @@
 package handler
 
 import (
+	"io/fs"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/config/ui"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/security"
+	"github.com/TwiN/gatus/v4/web"
 	"github.com/TwiN/health"
 	"github.com/gorilla/mux"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 )
 
-func CreateRouter(staticFolder string, securityConfig *security.Config, uiConfig *ui.Config, enabledMetrics bool) *mux.Router {
+func CreateRouter(cfg *config.Config) *mux.Router {
 	router := mux.NewRouter()
-	if enabledMetrics {
+	if cfg.Metrics {
 		router.Handle("/metrics", promhttp.Handler()).Methods("GET")
 	}
 	api := router.PathPrefix("/api").Subrouter()
 	protected := api.PathPrefix("/").Subrouter()
 	unprotected := api.PathPrefix("/").Subrouter()
-	if securityConfig != nil {
+	if cfg.Security != nil {
-		if err := securityConfig.RegisterHandlers(router); err != nil {
+		if err := cfg.Security.RegisterHandlers(router); err != nil {
 			panic(err)
 		}
-		if err := securityConfig.ApplySecurityMiddleware(protected); err != nil {
+		if err := cfg.Security.ApplySecurityMiddleware(protected); err != nil {
 			panic(err)
 		}
 	}
 	// Endpoints
-	unprotected.Handle("/v1/config", ConfigHandler{securityConfig: securityConfig}).Methods("GET")
+	unprotected.Handle("/v1/config", ConfigHandler{securityConfig: cfg.Security}).Methods("GET")
-	protected.HandleFunc("/v1/endpoints/statuses", EndpointStatuses).Methods("GET") // No GzipHandler for this one, because we cache the content as Gzipped already
+	protected.HandleFunc("/v1/endpoints/statuses", EndpointStatuses(cfg)).Methods("GET") // No GzipHandler for this one, because we cache the content as Gzipped already
 	protected.HandleFunc("/v1/endpoints/{key}/statuses", GzipHandlerFunc(EndpointStatus)).Methods("GET")
+	unprotected.HandleFunc("/v1/endpoints/{key}/health/badge.svg", HealthBadge).Methods("GET")
 	unprotected.HandleFunc("/v1/endpoints/{key}/uptimes/{duration}/badge.svg", UptimeBadge).Methods("GET")
-	unprotected.HandleFunc("/v1/endpoints/{key}/response-times/{duration}/badge.svg", ResponseTimeBadge).Methods("GET")
+	unprotected.HandleFunc("/v1/endpoints/{key}/response-times/{duration}/badge.svg", ResponseTimeBadge(cfg)).Methods("GET")
 	unprotected.HandleFunc("/v1/endpoints/{key}/response-times/{duration}/chart.svg", ResponseTimeChart).Methods("GET")
-	// XXX: Remove the lines between this and the next XXX comment in v4.0.0
-	protected.HandleFunc("/v1/services/statuses", EndpointStatuses).Methods("GET") // No GzipHandler for this one, because we cache the content as Gzipped already
-	protected.HandleFunc("/v1/services/{key}/statuses", GzipHandlerFunc(EndpointStatus)).Methods("GET")
-	unprotected.HandleFunc("/v1/services/{key}/uptimes/{duration}/badge.svg", UptimeBadge).Methods("GET")
-	unprotected.HandleFunc("/v1/services/{key}/response-times/{duration}/badge.svg", ResponseTimeBadge).Methods("GET")
-	unprotected.HandleFunc("/v1/services/{key}/response-times/{duration}/chart.svg", ResponseTimeChart).Methods("GET")
-	// XXX: Remove the lines between this and the previous XXX comment in v4.0.0
 	// Misc
 	router.Handle("/health", health.Handler().WithJSON(true)).Methods("GET")
-	router.HandleFunc("/favicon.ico", FavIcon(staticFolder)).Methods("GET")
 	// SPA
-	router.HandleFunc("/services/{name}", SinglePageApplication(staticFolder, uiConfig)).Methods("GET") // XXX: Remove this in v4.0.0
+	router.HandleFunc("/endpoints/{name}", SinglePageApplication(cfg.UI)).Methods("GET")
-	router.HandleFunc("/endpoints/{name}", SinglePageApplication(staticFolder, uiConfig)).Methods("GET")
+	router.HandleFunc("/", SinglePageApplication(cfg.UI)).Methods("GET")
-	router.HandleFunc("/", SinglePageApplication(staticFolder, uiConfig)).Methods("GET")
 	// Everything else falls back on static content
-	router.PathPrefix("/").Handler(GzipHandler(http.FileServer(http.Dir(staticFolder))))
+	staticFileSystem, err := fs.Sub(static.FileSystem, static.RootPath)
+	if err != nil {
+		panic(err)
+	}
+	router.PathPrefix("/").Handler(GzipHandler(http.FileServer(http.FS(staticFileSystem))))
 	return router
 }

controller/handler/handler_test.go

@@ -4,10 +4,12 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"testing"
+
+	"github.com/TwiN/gatus/v4/config"
 )
 
 func TestCreateRouter(t *testing.T) {
-	router := CreateRouter("../../web/static", nil, nil, true)
+	router := CreateRouter(&config.Config{Metrics: true})
 	type Scenario struct {
 		Name         string
 		Path         string
@@ -26,16 +28,32 @@ func TestCreateRouter(t *testing.T) {
 			ExpectedCode: http.StatusOK,
 		},
 		{
-			Name:         "scripts",
+			Name:         "favicon.ico",
+			Path:         "/favicon.ico",
+			ExpectedCode: http.StatusOK,
+		},
+		{
+			Name:         "app.js",
 			Path:         "/js/app.js",
 			ExpectedCode: http.StatusOK,
 		},
 		{
-			Name:         "scripts-gzipped",
+			Name:         "app.js-gzipped",
 			Path:         "/js/app.js",
 			ExpectedCode: http.StatusOK,
 			Gzip:         true,
 		},
+		{
+			Name:         "chunk-vendors.js",
+			Path:         "/js/chunk-vendors.js",
+			ExpectedCode: http.StatusOK,
+		},
+		{
+			Name:         "chunk-vendors.js-gzipped",
+			Path:         "/js/chunk-vendors.js",
+			ExpectedCode: http.StatusOK,
+			Gzip:         true,
+		},
 		{
 			Name:         "index-redirect",
 			Path:         "/index.html",

controller/handler/spa.go

@@ -1,26 +1,30 @@
 package handler
 
 import (
+	_ "embed"
 	"html/template"
 	"log"
 	"net/http"
 
-	"github.com/TwiN/gatus/v3/config/ui"
+	"github.com/TwiN/gatus/v4/config/ui"
+	"github.com/TwiN/gatus/v4/web"
 )
 
-func SinglePageApplication(staticFolder string, ui *ui.Config) http.HandlerFunc {
+func SinglePageApplication(ui *ui.Config) http.HandlerFunc {
 	return func(writer http.ResponseWriter, request *http.Request) {
-		t, err := template.ParseFiles(staticFolder + "/index.html")
+		t, err := template.ParseFS(static.FileSystem, static.IndexPath)
 		if err != nil {
-			log.Println("[handler][SinglePageApplication] Failed to parse template:", err.Error())
+			// This should never happen, because ui.ValidateAndSetDefaults validates that the template works.
-			http.ServeFile(writer, request, staticFolder+"/index.html")
+			log.Println("[handler][SinglePageApplication] Failed to parse template. This should never happen, because the template is validated on start. Error:", err.Error())
+			http.Error(writer, "Failed to parse template. This should never happen, because the template is validated on start.", http.StatusInternalServerError)
 			return
 		}
 		writer.Header().Set("Content-Type", "text/html")
 		err = t.Execute(writer, ui)
 		if err != nil {
-			log.Println("[handler][SinglePageApplication] Failed to parse template:", err.Error())
+			// This should never happen, because ui.ValidateAndSetDefaults validates that the template works.
-			http.ServeFile(writer, request, staticFolder+"/index.html")
+			log.Println("[handler][SinglePageApplication] Failed to execute template. This should never happen, because the template is validated on start. Error:", err.Error())
+			http.Error(writer, "Failed to execute template. This should never happen, because the template is validated on start.", http.StatusInternalServerError)
 			return
 		}
 	}

controller/handler/spa_test.go

@@ -6,10 +6,10 @@ import (
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v3/config"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/core"
+	"github.com/TwiN/gatus/v4/core"
-	"github.com/TwiN/gatus/v3/storage/store"
+	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v3/watchdog"
+	"github.com/TwiN/gatus/v4/watchdog"
 )
 
 func TestSinglePageApplication(t *testing.T) {
@@ -30,7 +30,7 @@ func TestSinglePageApplication(t *testing.T) {
 	}
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[0], &core.Result{Success: true, Duration: time.Millisecond, Timestamp: time.Now()})
 	watchdog.UpdateEndpointStatuses(cfg.Endpoints[1], &core.Result{Success: false, Duration: time.Second, Timestamp: time.Now()})
-	router := CreateRouter("../../web/static", cfg.Security, nil, cfg.Metrics)
+	router := CreateRouter(cfg)
 	type Scenario struct {
 		Name         string
 		Path         string
@@ -48,11 +48,6 @@ func TestSinglePageApplication(t *testing.T) {
 			Path:         "/endpoints/core_frontend",
 			ExpectedCode: http.StatusOK,
 		},
-		{ // XXX: Remove this in v4.0.0
-			Name:         "frontend-service",
-			Path:         "/services/core_frontend",
-			ExpectedCode: http.StatusOK,
-		},
 	}
 	for _, scenario := range scenarios {
 		t.Run(scenario.Name, func(t *testing.T) {

controller/handler/util.go

@@ -4,7 +4,7 @@ import (
 	"net/http"
 	"strconv"
 
-	"github.com/TwiN/gatus/v3/storage/store/common"
+	"github.com/TwiN/gatus/v4/storage/store/common"
 )
 
 const (

core/condition.go

@@ -6,8 +6,8 @@ import (
 	"strings"
 	"time"
 
-	"github.com/TwiN/gatus/v3/jsonpath"
+	"github.com/TwiN/gatus/v4/jsonpath"
-	"github.com/TwiN/gatus/v3/pattern"
+	"github.com/TwiN/gatus/v4/pattern"
 )
 
 const (
@@ -46,6 +46,9 @@ const (
 	// Values that could replace the placeholder: 4461677039 (~52 days)
 	CertificateExpirationPlaceholder = "[CERTIFICATE_EXPIRATION]"
 
+	// DomainExpirationPlaceholder is a placeholder for the duration before the domain expires, in milliseconds.
+	DomainExpirationPlaceholder = "[DOMAIN_EXPIRATION]"
+
 	// LengthFunctionPrefix is the prefix for the length function
 	//
 	// Usage: len([BODY].articles) == 10, len([BODY].name) > 5
@@ -142,9 +145,21 @@ func (c Condition) hasBodyPlaceholder() bool {
 	return strings.Contains(string(c), BodyPlaceholder)
 }
 
+// hasDomainExpirationPlaceholder checks whether the condition has a DomainExpirationPlaceholder
+// Used for determining whether a whois operation is necessary
+func (c Condition) hasDomainExpirationPlaceholder() bool {
+	return strings.Contains(string(c), DomainExpirationPlaceholder)
+}
+
+// hasIPPlaceholder checks whether the condition has an IPPlaceholder
+// Used for determining whether an IP lookup is necessary
+func (c Condition) hasIPPlaceholder() bool {
+	return strings.Contains(string(c), IPPlaceholder)
+}
+
 // isEqual compares two strings.
 //
-// Supports the pattern and the any functions.
+// Supports the "pat" and the "any" functions.
 // i.e. if one of the parameters starts with PatternFunctionPrefix and ends with FunctionSuffix, it will be treated like
 // a pattern.
 func isEqual(first, second string) bool {
@@ -219,6 +234,8 @@ func sanitizeAndResolve(elements []string, result *Result) ([]string, []string)
 			element = strconv.FormatBool(result.Connected)
 		case CertificateExpirationPlaceholder:
 			element = strconv.FormatInt(result.CertificateExpiration.Milliseconds(), 10)
+		case DomainExpirationPlaceholder:
+			element = strconv.FormatInt(result.DomainExpiration.Milliseconds(), 10)
 		default:
 			// if contains the BodyPlaceholder, then evaluate json path
 			if strings.Contains(element, BodyPlaceholder) {

core/dns_test.go

@@ -2,8 +2,9 @@ package core
 
 import (
 	"testing"
+	"time"
 
-	"github.com/TwiN/gatus/v3/pattern"
+	"github.com/TwiN/gatus/v4/pattern"
 )
 
 func TestIntegrationQuery(t *testing.T) {
@@ -21,7 +22,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "A",
 				QueryName: "example.com.",
 			},
-			inputURL:        "8.8.8.8",
+			inputURL:        "1.1.1.1",
 			expectedDNSCode: "NOERROR",
 			expectedBody:    "93.184.216.34",
 		},
@@ -31,7 +32,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "AAAA",
 				QueryName: "example.com.",
 			},
-			inputURL:        "8.8.8.8",
+			inputURL:        "1.1.1.1",
 			expectedDNSCode: "NOERROR",
 			expectedBody:    "2606:2800:220:1:248:1893:25c8:1946",
 		},
@@ -39,11 +40,11 @@ func TestIntegrationQuery(t *testing.T) {
 			name: "test DNS with type CNAME",
 			inputDNS: DNS{
 				QueryType: "CNAME",
-				QueryName: "doc.google.com.",
+				QueryName: "en.wikipedia.org.",
 			},
-			inputURL:        "8.8.8.8",
+			inputURL:        "1.1.1.1",
 			expectedDNSCode: "NOERROR",
-			expectedBody:    "writely.l.google.com.",
+			expectedBody:    "dyna.wikimedia.org.",
 		},
 		{
 			name: "test DNS with type MX",
@@ -51,7 +52,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "MX",
 				QueryName: "example.com.",
 			},
-			inputURL:        "8.8.8.8",
+			inputURL:        "1.1.1.1",
 			expectedDNSCode: "NOERROR",
 			expectedBody:    ".",
 		},
@@ -61,7 +62,7 @@ func TestIntegrationQuery(t *testing.T) {
 				QueryType: "NS",
 				QueryName: "example.com.",
 			},
-			inputURL:        "8.8.8.8",
+			inputURL:        "1.1.1.1",
 			expectedDNSCode: "NOERROR",
 			expectedBody:    "*.iana-servers.net.",
 		},
@@ -69,15 +70,14 @@ func TestIntegrationQuery(t *testing.T) {
 			name: "test DNS with fake type and retrieve error",
 			inputDNS: DNS{
 				QueryType: "B",
-				QueryName: "google",
+				QueryName: "example",
 			},
-			inputURL:      "8.8.8.8",
+			inputURL:      "1.1.1.1",
 			isErrExpected: true,
 		},
 	}
 
 	for _, test := range tests {
-		test := test
 		t.Run(test.name, func(t *testing.T) {
 			dns := test.inputDNS
 			result := &Result{}
@@ -86,9 +86,8 @@ func TestIntegrationQuery(t *testing.T) {
 				t.Errorf("there should be errors")
 			}
 			if result.DNSRCode != test.expectedDNSCode {
-				t.Errorf("DNSRCodePlaceholder '%s' should have been %s", result.DNSRCode, test.expectedDNSCode)
+				t.Errorf("expected DNSRCode to be %s, got %s", test.expectedDNSCode, result.DNSRCode)
 			}
-
 			if test.inputDNS.QueryType == "NS" {
 				// Because there are often multiple nameservers backing a single domain, we'll only look at the suffix
 				if !pattern.Match(test.expectedBody, string(result.body)) {
@@ -100,6 +99,7 @@ func TestIntegrationQuery(t *testing.T) {
 				}
 			}
 		})
+		time.Sleep(5 * time.Millisecond)
 	}
 }
 

core/endpoint.go

@@ -12,12 +12,15 @@ import (
 	"strings"
 	"time"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
-	"github.com/TwiN/gatus/v3/core/ui"
+	"github.com/TwiN/gatus/v4/core/ui"
-	"github.com/TwiN/gatus/v3/util"
+	"github.com/TwiN/gatus/v4/util"
+	"github.com/TwiN/whois"
 )
 
+type EndpointType string
+
 const (
 	// HostHeader is the name of the header used to specify the host
 	HostHeader = "Host"
@@ -30,6 +33,14 @@ const (
 
 	// GatusUserAgent is the default user agent that Gatus uses to send requests.
 	GatusUserAgent = "Gatus/1.0"
+
+	EndpointTypeDNS      EndpointType = "DNS"
+	EndpointTypeTCP      EndpointType = "TCP"
+	EndpointTypeICMP     EndpointType = "ICMP"
+	EndpointTypeSTARTTLS EndpointType = "STARTTLS"
+	EndpointTypeTLS      EndpointType = "TLS"
+	EndpointTypeHTTP     EndpointType = "HTTP"
+	EndpointTypeUNKNOWN  EndpointType = "UNKNOWN"
 )
 
 var (
@@ -44,6 +55,15 @@ var (
 
 	// ErrEndpointWithInvalidNameOrGroup is the error with which Gatus will panic if an endpoint has an invalid character where it shouldn't
 	ErrEndpointWithInvalidNameOrGroup = errors.New("endpoint name and group must not have \" or \\")
+
+	// ErrUnknownEndpointType is the error with which Gatus will panic if an endpoint has an unknown type
+	ErrUnknownEndpointType = errors.New("unknown endpoint type")
+
+	// ErrInvalidEndpointIntervalForDomainExpirationPlaceholder is the error with which Gatus will panic if an endpoint
+	// has both an interval smaller than 5 minutes and a condition with DomainExpirationPlaceholder.
+	// This is because the free whois service we are using should not be abused, especially considering the fact that
+	// the data takes a while to be updated.
+	ErrInvalidEndpointIntervalForDomainExpirationPlaceholder = errors.New("the minimum interval for an endpoint with a condition using the " + DomainExpirationPlaceholder + " placeholder is 300s (5m)")
 )
 
 // Endpoint is the configuration of a monitored
@@ -79,7 +99,7 @@ type Endpoint struct {
 	Interval time.Duration `yaml:"interval,omitempty"`
 
 	// Conditions used to determine the health of the endpoint
-	Conditions []*Condition `yaml:"conditions"`
+	Conditions []Condition `yaml:"conditions"`
 
 	// Alerts is the alerting configuration for the endpoint in case of failure
 	Alerts []*alert.Alert `yaml:"alerts,omitempty"`
@@ -105,16 +125,42 @@ func (endpoint Endpoint) IsEnabled() bool {
 	return *endpoint.Enabled
 }
 
-// ValidateAndSetDefaults validates the endpoint's configuration and sets the default value of fields that have one
+// Type returns the endpoint type
+func (endpoint Endpoint) Type() EndpointType {
+	switch {
+	case endpoint.DNS != nil:
+		return EndpointTypeDNS
+	case strings.HasPrefix(endpoint.URL, "tcp://"):
+		return EndpointTypeTCP
+	case strings.HasPrefix(endpoint.URL, "icmp://"):
+		return EndpointTypeICMP
+	case strings.HasPrefix(endpoint.URL, "starttls://"):
+		return EndpointTypeSTARTTLS
+	case strings.HasPrefix(endpoint.URL, "tls://"):
+		return EndpointTypeTLS
+	case strings.HasPrefix(endpoint.URL, "http://") || strings.HasPrefix(endpoint.URL, "https://"):
+		return EndpointTypeHTTP
+	default:
+		return EndpointTypeUNKNOWN
+	}
+}
+
+// ValidateAndSetDefaults validates the endpoint's configuration and sets the default value of args that have one
 func (endpoint *Endpoint) ValidateAndSetDefaults() error {
 	// Set default values
 	if endpoint.ClientConfig == nil {
 		endpoint.ClientConfig = client.GetDefaultConfig()
 	} else {
-		endpoint.ClientConfig.ValidateAndSetDefaults()
+		if err := endpoint.ClientConfig.ValidateAndSetDefaults(); err != nil {
+			return err
+		}
 	}
 	if endpoint.UIConfig == nil {
 		endpoint.UIConfig = ui.GetDefaultConfig()
+	} else {
+		if err := endpoint.UIConfig.ValidateAndSetDefaults(); err != nil {
+			return err
+		}
 	}
 	if endpoint.Interval == 0 {
 		endpoint.Interval = 1 * time.Minute
@@ -151,9 +197,19 @@ func (endpoint *Endpoint) ValidateAndSetDefaults() error {
 	if len(endpoint.Conditions) == 0 {
 		return ErrEndpointWithNoCondition
 	}
+	if endpoint.Interval < 5*time.Minute {
+		for _, condition := range endpoint.Conditions {
+			if condition.hasDomainExpirationPlaceholder() {
+				return ErrInvalidEndpointIntervalForDomainExpirationPlaceholder
+			}
+		}
+	}
 	if endpoint.DNS != nil {
 		return endpoint.DNS.validateAndSetDefault()
 	}
+	if endpoint.Type() == EndpointTypeUNKNOWN {
+		return ErrUnknownEndpointType
+	}
 	// Make sure that the request can be created
 	_, err := http.NewRequest(endpoint.Method, endpoint.URL, bytes.NewBuffer([]byte(endpoint.Body)))
 	if err != nil {
@@ -178,7 +234,26 @@ func (endpoint Endpoint) Key() string {
 // EvaluateHealth sends a request to the endpoint's URL and evaluates the conditions of the endpoint.
 func (endpoint *Endpoint) EvaluateHealth() *Result {
 	result := &Result{Success: true, Errors: []string{}}
-	endpoint.getIP(result)
+	// Parse or extract hostname from URL
+	if endpoint.DNS != nil {
+		result.Hostname = strings.TrimSuffix(endpoint.URL, ":53")
+	} else {
+		urlObject, err := url.Parse(endpoint.URL)
+		if err != nil {
+			result.AddError(err.Error())
+		} else {
+			result.Hostname = urlObject.Hostname()
+		}
+	}
+	// Retrieve IP if necessary
+	if endpoint.needsToRetrieveIP() {
+		endpoint.getIP(result)
+	}
+	// Retrieve domain expiration if necessary
+	if endpoint.needsToRetrieveDomainExpiration() && len(result.Hostname) > 0 {
+		endpoint.getDomainExpiration(result)
+	}
+	//
 	if len(result.Errors) == 0 {
 		endpoint.call(result)
 	} else {
@@ -194,23 +269,21 @@ func (endpoint *Endpoint) EvaluateHealth() *Result {
 	// No need to keep the body after the endpoint has been evaluated
 	result.body = nil
 	// Clean up parameters that we don't need to keep in the results
+	if endpoint.UIConfig.HideURL {
+		for errIdx, errorString := range result.Errors {
+			result.Errors[errIdx] = strings.ReplaceAll(errorString, endpoint.URL, "<redacted>")
+		}
+	}
 	if endpoint.UIConfig.HideHostname {
+		for errIdx, errorString := range result.Errors {
+			result.Errors[errIdx] = strings.ReplaceAll(errorString, result.Hostname, "<redacted>")
+		}
 		result.Hostname = ""
 	}
 	return result
 }
 
 func (endpoint *Endpoint) getIP(result *Result) {
-	if endpoint.DNS != nil {
-		result.Hostname = strings.TrimSuffix(endpoint.URL, ":53")
-	} else {
-		urlObject, err := url.Parse(endpoint.URL)
-		if err != nil {
-			result.AddError(err.Error())
-			return
-		}
-		result.Hostname = urlObject.Hostname()
-	}
 	ips, err := net.LookupIP(result.Hostname)
 	if err != nil {
 		result.AddError(err.Error())
@@ -219,26 +292,30 @@ func (endpoint *Endpoint) getIP(result *Result) {
 	result.IP = ips[0].String()
 }
 
+func (endpoint *Endpoint) getDomainExpiration(result *Result) {
+	whoisClient := whois.NewClient()
+	if whoisResponse, err := whoisClient.QueryAndParse(result.Hostname); err != nil {
+		result.AddError("error querying and parsing hostname using whois client: " + err.Error())
+	} else {
+		result.DomainExpiration = time.Until(whoisResponse.ExpirationDate)
+	}
+}
+
 func (endpoint *Endpoint) call(result *Result) {
 	var request *http.Request
 	var response *http.Response
 	var err error
 	var certificate *x509.Certificate
-	isTypeDNS := endpoint.DNS != nil
+	endpointType := endpoint.Type()
-	isTypeTCP := strings.HasPrefix(endpoint.URL, "tcp://")
+	if endpointType == EndpointTypeHTTP {
-	isTypeICMP := strings.HasPrefix(endpoint.URL, "icmp://")
-	isTypeSTARTTLS := strings.HasPrefix(endpoint.URL, "starttls://")
-	isTypeTLS := strings.HasPrefix(endpoint.URL, "tls://")
-	isTypeHTTP := !isTypeDNS && !isTypeTCP && !isTypeICMP && !isTypeSTARTTLS && !isTypeTLS
-	if isTypeHTTP {
 		request = endpoint.buildHTTPRequest()
 	}
 	startTime := time.Now()
-	if isTypeDNS {
+	if endpointType == EndpointTypeDNS {
 		endpoint.DNS.query(endpoint.URL, result)
 		result.Duration = time.Since(startTime)
-	} else if isTypeSTARTTLS || isTypeTLS {
+	} else if endpointType == EndpointTypeSTARTTLS || endpointType == EndpointTypeTLS {
-		if isTypeSTARTTLS {
+		if endpointType == EndpointTypeSTARTTLS {
 			result.Connected, certificate, err = client.CanPerformStartTLS(strings.TrimPrefix(endpoint.URL, "starttls://"), endpoint.ClientConfig)
 		} else {
 			result.Connected, certificate, err = client.CanPerformTLS(strings.TrimPrefix(endpoint.URL, "tls://"), endpoint.ClientConfig)
@@ -249,10 +326,10 @@ func (endpoint *Endpoint) call(result *Result) {
 		}
 		result.Duration = time.Since(startTime)
 		result.CertificateExpiration = time.Until(certificate.NotAfter)
-	} else if isTypeTCP {
+	} else if endpointType == EndpointTypeTCP {
 		result.Connected = client.CanCreateTCPConnection(strings.TrimPrefix(endpoint.URL, "tcp://"), endpoint.ClientConfig)
 		result.Duration = time.Since(startTime)
-	} else if isTypeICMP {
+	} else if endpointType == EndpointTypeICMP {
 		result.Connected, result.Duration = client.Ping(strings.TrimPrefix(endpoint.URL, "icmp://"), endpoint.ClientConfig)
 	} else {
 		response, err = client.GetHTTPClient(endpoint.ClientConfig).Do(request)
@@ -272,7 +349,7 @@ func (endpoint *Endpoint) call(result *Result) {
 		if endpoint.needsToReadBody() {
 			result.body, err = io.ReadAll(response.Body)
 			if err != nil {
-				result.AddError(err.Error())
+				result.AddError("error reading response body:" + err.Error())
 			}
 		}
 	}
@@ -299,7 +376,7 @@ func (endpoint *Endpoint) buildHTTPRequest() *http.Request {
 	return request
 }
 
-// needsToReadBody checks if there's any conditions that requires the response body to be read
+// needsToReadBody checks if there's any condition that requires the response body to be read
 func (endpoint *Endpoint) needsToReadBody() bool {
 	for _, condition := range endpoint.Conditions {
 		if condition.hasBodyPlaceholder() {
@@ -308,3 +385,23 @@ func (endpoint *Endpoint) needsToReadBody() bool {
 	}
 	return false
 }
+
+// needsToRetrieveDomainExpiration checks if there's any condition that requires a whois query to be performed
+func (endpoint *Endpoint) needsToRetrieveDomainExpiration() bool {
+	for _, condition := range endpoint.Conditions {
+		if condition.hasDomainExpirationPlaceholder() {
+			return true
+		}
+	}
+	return false
+}
+
+// needsToRetrieveIP checks if there's any condition that requires an IP lookup
+func (endpoint *Endpoint) needsToRetrieveIP() bool {
+	for _, condition := range endpoint.Conditions {
+		if condition.hasIPPlaceholder() {
+			return true
+		}
+	}
+	return false
+}

core/endpoint_status.go

@@ -1,6 +1,6 @@
 package core
 
-import "github.com/TwiN/gatus/v3/util"
+import "github.com/TwiN/gatus/v4/util"
 
 // EndpointStatus contains the evaluation Results of an Endpoint
 type EndpointStatus struct {

core/endpoint_test.go

@@ -1,15 +1,245 @@
 package core
 
 import (
+	"bytes"
+	"crypto/tls"
+	"crypto/x509"
 	"io"
+	"net/http"
 	"strings"
 	"testing"
 	"time"
 
-	"github.com/TwiN/gatus/v3/alerting/alert"
+	"github.com/TwiN/gatus/v4/alerting/alert"
-	"github.com/TwiN/gatus/v3/client"
+	"github.com/TwiN/gatus/v4/client"
+	"github.com/TwiN/gatus/v4/core/ui"
+	"github.com/TwiN/gatus/v4/test"
 )
 
+func TestEndpoint(t *testing.T) {
+	defer client.InjectHTTPClient(nil)
+	scenarios := []struct {
+		Name             string
+		Endpoint         Endpoint
+		ExpectedResult   *Result
+		MockRoundTripper test.MockRoundTripper
+	}{
+		{
+			Name: "success",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[STATUS] == 200", "[BODY].status == UP", "[CERTIFICATE_EXPIRATION] > 24h"},
+			},
+			ExpectedResult: &Result{
+				Success:   true,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[STATUS] == 200", Success: true},
+					{Condition: "[BODY].status == UP", Success: true},
+					{Condition: "[CERTIFICATE_EXPIRATION] > 24h", Success: true},
+				},
+				DomainExpiration: 0, // Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       io.NopCloser(bytes.NewBufferString(`{"status": "UP"}`)),
+					TLS:        &tls.ConnectionState{PeerCertificates: []*x509.Certificate{{NotAfter: time.Now().Add(9999 * time.Hour)}}},
+				}
+			}),
+		},
+		{
+			Name: "failed-body-condition",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[STATUS] == 200", "[BODY].status == UP"},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[STATUS] == 200", Success: true},
+					{Condition: "[BODY].status (DOWN) == UP", Success: false},
+				},
+				DomainExpiration: 0, // Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: io.NopCloser(bytes.NewBufferString(`{"status": "DOWN"}`))}
+			}),
+		},
+		{
+			Name: "failed-status-condition",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[STATUS] == 200"},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[STATUS] (502) == 200", Success: false},
+				},
+				DomainExpiration: 0, // Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusBadGateway, Body: http.NoBody}
+			}),
+		},
+		{
+			Name: "condition-with-failed-certificate-expiration",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[CERTIFICATE_EXPIRATION] > 100h"},
+				UIConfig:   &ui.Config{DontResolveFailedConditions: true},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					// Because UIConfig.DontResolveFailedConditions is true, the values in the condition should not be resolved
+					{Condition: "[CERTIFICATE_EXPIRATION] > 100h", Success: false},
+				},
+				DomainExpiration: 0, // Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{
+					StatusCode: http.StatusOK,
+					Body:       http.NoBody,
+					TLS:        &tls.ConnectionState{PeerCertificates: []*x509.Certificate{{NotAfter: time.Now().Add(5 * time.Hour)}}},
+				}
+			}),
+		},
+		{
+			Name: "domain-expiration",
+			Endpoint: Endpoint{
+				Name:       "website-health",
+				URL:        "https://twin.sh/health",
+				Conditions: []Condition{"[DOMAIN_EXPIRATION] > 100h"},
+			},
+			ExpectedResult: &Result{
+				Success:   true,
+				Connected: true,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[DOMAIN_EXPIRATION] > 100h", Success: true},
+				},
+				DomainExpiration: 999999 * time.Hour, // Note that this test only checks if it's non-zero.
+			},
+			MockRoundTripper: test.MockRoundTripper(func(r *http.Request) *http.Response {
+				return &http.Response{StatusCode: http.StatusOK, Body: http.NoBody}
+			}),
+		},
+		{
+			Name: "endpoint-that-will-time-out-and-hidden-hostname",
+			Endpoint: Endpoint{
+				Name:         "endpoint-that-will-time-out",
+				URL:          "https://twin.sh/health",
+				Conditions:   []Condition{"[CONNECTED] == true"},
+				UIConfig:     &ui.Config{HideHostname: true},
+				ClientConfig: &client.Config{Timeout: time.Millisecond},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: false,
+				Hostname:  "", // Because Endpoint.UIConfig.HideHostname is true, this should be empty.
+				ConditionResults: []*ConditionResult{
+					{Condition: "[CONNECTED] (false) == true", Success: false},
+				},
+				// Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+				DomainExpiration: 0,
+				// Because Endpoint.UIConfig.HideHostname is true, the hostname should be replaced by <redacted>.
+				Errors: []string{`Get "https://<redacted>/health": context deadline exceeded (Client.Timeout exceeded while awaiting headers)`},
+			},
+			MockRoundTripper: nil,
+		},
+		{
+			Name: "endpoint-that-will-time-out-and-hidden-url",
+			Endpoint: Endpoint{
+				Name:         "endpoint-that-will-time-out",
+				URL:          "https://twin.sh/health",
+				Conditions:   []Condition{"[CONNECTED] == true"},
+				UIConfig:     &ui.Config{HideURL: true},
+				ClientConfig: &client.Config{Timeout: time.Millisecond},
+			},
+			ExpectedResult: &Result{
+				Success:   false,
+				Connected: false,
+				Hostname:  "twin.sh",
+				ConditionResults: []*ConditionResult{
+					{Condition: "[CONNECTED] (false) == true", Success: false},
+				},
+				// Because there's no [DOMAIN_EXPIRATION] condition, this is not resolved, so it should be 0.
+				DomainExpiration: 0,
+				// Because Endpoint.UIConfig.HideURL is true, the URL should be replaced by <redacted>.
+				Errors: []string{`Get "<redacted>": context deadline exceeded (Client.Timeout exceeded while awaiting headers)`},
+			},
+			MockRoundTripper: nil,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.Name, func(t *testing.T) {
+			if scenario.MockRoundTripper != nil {
+				mockClient := &http.Client{Transport: scenario.MockRoundTripper}
+				if scenario.Endpoint.ClientConfig != nil && scenario.Endpoint.ClientConfig.Timeout > 0 {
+					mockClient.Timeout = scenario.Endpoint.ClientConfig.Timeout
+				}
+				client.InjectHTTPClient(mockClient)
+			} else {
+				client.InjectHTTPClient(nil)
+			}
+			scenario.Endpoint.ValidateAndSetDefaults()
+			result := scenario.Endpoint.EvaluateHealth()
+			if result.Success != scenario.ExpectedResult.Success {
+				t.Errorf("Expected success to be %v, got %v", scenario.ExpectedResult.Success, result.Success)
+			}
+			if result.Connected != scenario.ExpectedResult.Connected {
+				t.Errorf("Expected connected to be %v, got %v", scenario.ExpectedResult.Connected, result.Connected)
+			}
+			if result.Hostname != scenario.ExpectedResult.Hostname {
+				t.Errorf("Expected hostname to be %v, got %v", scenario.ExpectedResult.Hostname, result.Hostname)
+			}
+			if len(result.ConditionResults) != len(scenario.ExpectedResult.ConditionResults) {
+				t.Errorf("Expected %v condition results, got %v", len(scenario.ExpectedResult.ConditionResults), len(result.ConditionResults))
+			} else {
+				for i, conditionResult := range result.ConditionResults {
+					if conditionResult.Condition != scenario.ExpectedResult.ConditionResults[i].Condition {
+						t.Errorf("Expected condition to be %v, got %v", scenario.ExpectedResult.ConditionResults[i].Condition, conditionResult.Condition)
+					}
+					if conditionResult.Success != scenario.ExpectedResult.ConditionResults[i].Success {
+						t.Errorf("Expected success of condition '%s' to be %v, got %v", conditionResult.Condition, scenario.ExpectedResult.ConditionResults[i].Success, conditionResult.Success)
+					}
+				}
+			}
+			if len(result.Errors) != len(scenario.ExpectedResult.Errors) {
+				t.Errorf("Expected %v errors, got %v", len(scenario.ExpectedResult.Errors), len(result.Errors))
+			} else {
+				for i, err := range result.Errors {
+					if err != scenario.ExpectedResult.Errors[i] {
+						t.Errorf("Expected error to be %v, got %v", scenario.ExpectedResult.Errors[i], err)
+					}
+				}
+			}
+			if result.DomainExpiration != scenario.ExpectedResult.DomainExpiration {
+				// Note that DomainExpiration is only resolved if there's a condition with the DomainExpirationPlaceholder in it.
+				// In other words, if there's no condition with [DOMAIN_EXPIRATION] in it, the DomainExpiration field will be 0.
+				// Because this is a live call, mocking it would be too much of a pain, so we're just going to check if
+				// the actual value is non-zero when the expected result is non-zero.
+				if scenario.ExpectedResult.DomainExpiration.Hours() > 0 && !(result.DomainExpiration.Hours() > 0) {
+					t.Errorf("Expected domain expiration to be non-zero, got %v", result.DomainExpiration)
+				}
+			}
+		})
+	}
+}
+
 func TestEndpoint_IsEnabled(t *testing.T) {
 	if !(Endpoint{Enabled: nil}).IsEnabled() {
 		t.Error("endpoint.IsEnabled() should've returned true, because Enabled was set to nil")
@@ -22,12 +252,86 @@ func TestEndpoint_IsEnabled(t *testing.T) {
 	}
 }
 
+func TestEndpoint_Type(t *testing.T) {
+	type args struct {
+		URL string
+		DNS *DNS
+	}
+	tests := []struct {
+		args args
+		want EndpointType
+	}{
+		{
+			args: args{
+				URL: "1.1.1.1",
+				DNS: &DNS{
+					QueryType: "A",
+					QueryName: "example.com",
+				},
+			},
+			want: EndpointTypeDNS,
+		},
+		{
+			args: args{
+				URL: "tcp://127.0.0.1:6379",
+			},
+			want: EndpointTypeTCP,
+		},
+		{
+			args: args{
+				URL: "icmp://example.com",
+			},
+			want: EndpointTypeICMP,
+		},
+		{
+			args: args{
+				URL: "starttls://smtp.gmail.com:587",
+			},
+			want: EndpointTypeSTARTTLS,
+		},
+		{
+			args: args{
+				URL: "tls://example.com:443",
+			},
+			want: EndpointTypeTLS,
+		},
+		{
+			args: args{
+				URL: "https://twin.sh/health",
+			},
+			want: EndpointTypeHTTP,
+		},
+		{
+			args: args{
+				URL: "invalid://example.org",
+			},
+			want: EndpointTypeUNKNOWN,
+		},
+		{
+			args: args{
+				URL: "no-scheme",
+			},
+			want: EndpointTypeUNKNOWN,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(string(tt.want), func(t *testing.T) {
+			endpoint := Endpoint{
+				URL: tt.args.URL,
+				DNS: tt.args.DNS,
+			}
+			if got := endpoint.Type(); got != tt.want {
+				t.Errorf("Endpoint.Type() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
 func TestEndpoint_ValidateAndSetDefaults(t *testing.T) {
-	condition := Condition("[STATUS] == 200")
 	endpoint := Endpoint{
 		Name:       "website-health",
 		URL:        "https://twin.sh/health",
-		Conditions: []*Condition{&condition},
+		Conditions: []Condition{Condition("[STATUS] == 200")},
 		Alerts:     []*alert.Alert{{Type: alert.TypePagerDuty}},
 	}
 	endpoint.ValidateAndSetDefaults()
@@ -68,11 +372,10 @@ func TestEndpoint_ValidateAndSetDefaults(t *testing.T) {
 }
 
 func TestEndpoint_ValidateAndSetDefaultsWithClientConfig(t *testing.T) {
-	condition := Condition("[STATUS] == 200")
 	endpoint := Endpoint{
 		Name:       "website-health",
 		URL:        "https://twin.sh/health",
-		Conditions: []*Condition{&condition},
+		Conditions: []Condition{Condition("[STATUS] == 200")},
 		ClientConfig: &client.Config{
 			Insecure:       true,
 			IgnoreRedirect: true,
@@ -95,73 +398,88 @@ func TestEndpoint_ValidateAndSetDefaultsWithClientConfig(t *testing.T) {
 	}
 }
 
-func TestEndpoint_ValidateAndSetDefaultsWithNoName(t *testing.T) {
-	defer func() { recover() }()
-	condition := Condition("[STATUS] == 200")
-	endpoint := &Endpoint{
-		Name:       "",
-		URL:        "http://example.com",
-		Conditions: []*Condition{&condition},
-	}
-	err := endpoint.ValidateAndSetDefaults()
-	if err == nil {
-		t.Fatal("Should've returned an error because endpoint didn't have a name, which is a mandatory field")
-	}
-}
-
-func TestEndpoint_ValidateAndSetDefaultsWithNoUrl(t *testing.T) {
-	defer func() { recover() }()
-	condition := Condition("[STATUS] == 200")
-	endpoint := &Endpoint{
-		Name:       "example",
-		URL:        "",
-		Conditions: []*Condition{&condition},
-	}
-	err := endpoint.ValidateAndSetDefaults()
-	if err == nil {
-		t.Fatal("Should've returned an error because endpoint didn't have an url, which is a mandatory field")
-	}
-}
-
-func TestEndpoint_ValidateAndSetDefaultsWithNoConditions(t *testing.T) {
-	defer func() { recover() }()
-	endpoint := &Endpoint{
-		Name:       "example",
-		URL:        "http://example.com",
-		Conditions: nil,
-	}
-	err := endpoint.ValidateAndSetDefaults()
-	if err == nil {
-		t.Fatal("Should've returned an error because endpoint didn't have at least 1 condition")
-	}
-}
-
 func TestEndpoint_ValidateAndSetDefaultsWithDNS(t *testing.T) {
-	conditionSuccess := Condition("[DNS_RCODE] == NOERROR")
 	endpoint := &Endpoint{
 		Name: "dns-test",
-		URL:  "http://example.com",
+		URL:  "https://example.com",
 		DNS: &DNS{
 			QueryType: "A",
 			QueryName: "example.com",
 		},
-		Conditions: []*Condition{&conditionSuccess},
+		Conditions: []Condition{Condition("[DNS_RCODE] == NOERROR")},
 	}
 	err := endpoint.ValidateAndSetDefaults()
 	if err != nil {
-
+		t.Error("did not expect an error, got", err)
 	}
 	if endpoint.DNS.QueryName != "example.com." {
 		t.Error("Endpoint.dns.query-name should be formatted with . suffix")
 	}
 }
 
+func TestEndpoint_ValidateAndSetDefaultsWithSimpleErrors(t *testing.T) {
+	scenarios := []struct {
+		endpoint    *Endpoint
+		expectedErr error
+	}{
+		{
+			endpoint: &Endpoint{
+				Name:       "",
+				URL:        "https://example.com",
+				Conditions: []Condition{Condition("[STATUS] == 200")},
+			},
+			expectedErr: ErrEndpointWithNoName,
+		},
+		{
+			endpoint: &Endpoint{
+				Name:       "endpoint-with-no-url",
+				URL:        "",
+				Conditions: []Condition{Condition("[STATUS] == 200")},
+			},
+			expectedErr: ErrEndpointWithNoURL,
+		},
+		{
+			endpoint: &Endpoint{
+				Name:       "endpoint-with-no-conditions",
+				URL:        "https://example.com",
+				Conditions: nil,
+			},
+			expectedErr: ErrEndpointWithNoCondition,
+		},
+		{
+			endpoint: &Endpoint{
+				Name:       "domain-expiration-with-bad-interval",
+				URL:        "https://example.com",
+				Interval:   time.Minute,
+				Conditions: []Condition{Condition("[DOMAIN_EXPIRATION] > 720h")},
+			},
+			expectedErr: ErrInvalidEndpointIntervalForDomainExpirationPlaceholder,
+		},
+		{
+			endpoint: &Endpoint{
+				Name:       "domain-expiration-with-good-interval",
+				URL:        "https://example.com",
+				Interval:   5 * time.Minute,
+				Conditions: []Condition{Condition("[DOMAIN_EXPIRATION] > 720h")},
+			},
+			expectedErr: nil,
+		},
+	}
+	for _, scenario := range scenarios {
+		t.Run(scenario.endpoint.Name, func(t *testing.T) {
+			if err := scenario.endpoint.ValidateAndSetDefaults(); err != scenario.expectedErr {
+				t.Errorf("Expected error %v, got %v", scenario.expectedErr, err)
+			}
+		})
+	}
+}
+
 func TestEndpoint_buildHTTPRequest(t *testing.T) {
 	condition := Condition("[STATUS] == 200")
 	endpoint := Endpoint{
 		Name:       "website-health",
 		URL:        "https://twin.sh/health",
-		Conditions: []*Condition{&condition},
+		Conditions: []Condition{condition},
 	}
 	endpoint.ValidateAndSetDefaults()
 	request := endpoint.buildHTTPRequest()
@@ -181,7 +499,7 @@ func TestEndpoint_buildHTTPRequestWithCustomUserAgent(t *testing.T) {
 	endpoint := Endpoint{
 		Name:       "website-health",
 		URL:        "https://twin.sh/health",
-		Conditions: []*Condition{&condition},
+		Conditions: []Condition{condition},
 		Headers: map[string]string{
 			"User-Agent": "Test/2.0",
 		},
@@ -205,7 +523,7 @@ func TestEndpoint_buildHTTPRequestWithHostHeader(t *testing.T) {
 		Name:       "website-health",
 		URL:        "https://twin.sh/health",
 		Method:     "POST",
-		Conditions: []*Condition{&condition},
+		Conditions: []Condition{condition},
 		Headers: map[string]string{
 			"Host": "example.com",
 		},
@@ -226,7 +544,7 @@ func TestEndpoint_buildHTTPRequestWithGraphQLEnabled(t *testing.T) {
 		Name:       "website-graphql",
 		URL:        "https://twin.sh/graphql",
 		Method:     "POST",
-		Conditions: []*Condition{&condition},
+		Conditions: []Condition{condition},
 		GraphQL:    true,
 		Body: `{
   users(gender: "female") {
@@ -257,7 +575,7 @@ func TestIntegrationEvaluateHealth(t *testing.T) {
 	endpoint := Endpoint{
 		Name:       "website-health",
 		URL:        "https://twin.sh/health",
-		Conditions: []*Condition{&condition, &bodyCondition},
+		Conditions: []Condition{condition, bodyCondition},
 	}
 	endpoint.ValidateAndSetDefaults()
 	result := endpoint.EvaluateHealth()
@@ -270,25 +588,53 @@ func TestIntegrationEvaluateHealth(t *testing.T) {
 	if !result.Success {
 		t.Error("Because all conditions passed, this should have been a success")
 	}
+	if result.Hostname != "twin.sh" {
+		t.Error("result.Hostname should've been twin.sh, but was", result.Hostname)
+	}
 }
 
-func TestIntegrationEvaluateHealthWithFailure(t *testing.T) {
+func TestIntegrationEvaluateHealthWithInvalidCondition(t *testing.T) {
-	condition := Condition("[STATUS] == 500")
+	condition := Condition("[STATUS] invalid 200")
 	endpoint := Endpoint{
-		Name:       "website-health",
+		Name:       "invalid-condition",
 		URL:        "https://twin.sh/health",
-		Conditions: []*Condition{&condition},
+		Conditions: []Condition{condition},
+	}
+	if err := endpoint.ValidateAndSetDefaults(); err != nil {
+		// XXX: Should this really not return an error? After all, the condition is not valid and conditions are part of the endpoint...
+		t.Error("endpoint validation should've been successful, but wasn't")
+	}
+	result := endpoint.EvaluateHealth()
+	if result.Success {
+		t.Error("Because one of the conditions was invalid, result.Success should have been false")
+	}
+	if len(result.Errors) == 0 {
+		t.Error("There should've been an error")
+	}
+}
+
+func TestIntegrationEvaluateHealthWithErrorAndHideURL(t *testing.T) {
+	endpoint := Endpoint{
+		Name:       "invalid-url",
+		URL:        "https://httpstat.us/200?sleep=100",
+		Conditions: []Condition{Condition("[STATUS] == 200")},
+		ClientConfig: &client.Config{
+			Timeout: 1 * time.Millisecond,
+		},
+		UIConfig: &ui.Config{
+			HideURL: true,
+		},
 	}
 	endpoint.ValidateAndSetDefaults()
 	result := endpoint.EvaluateHealth()
-	if result.ConditionResults[0].Success {
-		t.Errorf("Condition '%s' should have been a failure", condition)
-	}
-	if !result.Connected {
-		t.Error("Because the connection has been established, result.Connected should've been true")
-	}
 	if result.Success {
-		t.Error("Because one of the conditions failed, success should have been false")
+		t.Error("Because one of the conditions was invalid, result.Success should have been false")
+	}
+	if len(result.Errors) == 0 {
+		t.Error("There should've been an error")
+	}
+	if !strings.Contains(result.Errors[0], "<redacted>") || strings.Contains(result.Errors[0], endpoint.URL) {
+		t.Error("result.Errors[0] should've had the URL redacted because ui.hide-url is set to true")
 	}
 }
 
@@ -297,17 +643,17 @@ func TestIntegrationEvaluateHealthForDNS(t *testing.T) {
 	conditionBody := Condition("[BODY] == 93.184.216.34")
 	endpoint := Endpoint{
 		Name: "example",
-		URL:  "8.8.8.8",
+		URL:  "1.1.1.1",
 		DNS: &DNS{
 			QueryType: "A",
 			QueryName: "example.com.",
 		},
-		Conditions: []*Condition{&conditionSuccess, &conditionBody},
+		Conditions: []Condition{conditionSuccess, conditionBody},
 	}
 	endpoint.ValidateAndSetDefaults()
 	result := endpoint.EvaluateHealth()
 	if !result.ConditionResults[0].Success {
-		t.Errorf("Conditions '%s' and %s should have been a success", conditionSuccess, conditionBody)
+		t.Errorf("Conditions '%s' and '%s' should have been a success", conditionSuccess, conditionBody)
 	}
 	if !result.Connected {
 		t.Error("Because the connection has been established, result.Connected should've been true")
@@ -318,16 +664,15 @@ func TestIntegrationEvaluateHealthForDNS(t *testing.T) {
 }
 
 func TestIntegrationEvaluateHealthForICMP(t *testing.T) {
-	conditionSuccess := Condition("[CONNECTED] == true")
 	endpoint := Endpoint{
 		Name:       "icmp-test",
 		URL:        "icmp://127.0.0.1",
-		Conditions: []*Condition{&conditionSuccess},
+		Conditions: []Condition{"[CONNECTED] == true"},
 	}
 	endpoint.ValidateAndSetDefaults()
 	result := endpoint.EvaluateHealth()
 	if !result.ConditionResults[0].Success {
-		t.Errorf("Conditions '%s' should have been a success", conditionSuccess)
+		t.Errorf("Conditions '%s' should have been a success", endpoint.Conditions[0])
 	}
 	if !result.Connected {
 		t.Error("Because the connection has been established, result.Connected should've been true")
@@ -337,12 +682,20 @@ func TestIntegrationEvaluateHealthForICMP(t *testing.T) {
 	}
 }
 
+func TestEndpoint_DisplayName(t *testing.T) {
+	if endpoint := (Endpoint{Name: "n"}); endpoint.DisplayName() != "n" {
+		t.Error("endpoint.DisplayName() should've been 'n', but was", endpoint.DisplayName())
+	}
+	if endpoint := (Endpoint{Group: "g", Name: "n"}); endpoint.DisplayName() != "g/n" {
+		t.Error("endpoint.DisplayName() should've been 'g/n', but was", endpoint.DisplayName())
+	}
+}
+
 func TestEndpoint_getIP(t *testing.T) {
-	conditionSuccess := Condition("[CONNECTED] == true")
 	endpoint := Endpoint{
 		Name:       "invalid-url-test",
 		URL:        "",
-		Conditions: []*Condition{&conditionSuccess},
+		Conditions: []Condition{"[CONNECTED] == true"},
 	}
 	result := &Result{}
 	endpoint.getIP(result)
@@ -351,26 +704,44 @@ func TestEndpoint_getIP(t *testing.T) {
 	}
 }
 
-func TestEndpoint_NeedsToReadBody(t *testing.T) {
+func TestEndpoint_needsToReadBody(t *testing.T) {
 	statusCondition := Condition("[STATUS] == 200")
 	bodyCondition := Condition("[BODY].status == UP")
 	bodyConditionWithLength := Condition("len([BODY].tags) > 0")
-	if (&Endpoint{Conditions: []*Condition{&statusCondition}}).needsToReadBody() {
+	if (&Endpoint{Conditions: []Condition{statusCondition}}).needsToReadBody() {
 		t.Error("expected false, got true")
 	}
-	if !(&Endpoint{Conditions: []*Condition{&bodyCondition}}).needsToReadBody() {
+	if !(&Endpoint{Conditions: []Condition{bodyCondition}}).needsToReadBody() {
 		t.Error("expected true, got false")
 	}
-	if !(&Endpoint{Conditions: []*Condition{&bodyConditionWithLength}}).needsToReadBody() {
+	if !(&Endpoint{Conditions: []Condition{bodyConditionWithLength}}).needsToReadBody() {
 		t.Error("expected true, got false")
 	}
-	if !(&Endpoint{Conditions: []*Condition{&statusCondition, &bodyCondition}}).needsToReadBody() {
+	if !(&Endpoint{Conditions: []Condition{statusCondition, bodyCondition}}).needsToReadBody() {
 		t.Error("expected true, got false")
 	}
-	if !(&Endpoint{Conditions: []*Condition{&bodyCondition, &statusCondition}}).needsToReadBody() {
+	if !(&Endpoint{Conditions: []Condition{bodyCondition, statusCondition}}).needsToReadBody() {
 		t.Error("expected true, got false")
 	}
-	if !(&Endpoint{Conditions: []*Condition{&bodyConditionWithLength, &statusCondition}}).needsToReadBody() {
+	if !(&Endpoint{Conditions: []Condition{bodyConditionWithLength, statusCondition}}).needsToReadBody() {
+		t.Error("expected true, got false")
+	}
+}
+
+func TestEndpoint_needsToRetrieveDomainExpiration(t *testing.T) {
+	if (&Endpoint{Conditions: []Condition{"[STATUS] == 200"}}).needsToRetrieveDomainExpiration() {
+		t.Error("expected false, got true")
+	}
+	if !(&Endpoint{Conditions: []Condition{"[STATUS] == 200", "[DOMAIN_EXPIRATION] < 720h"}}).needsToRetrieveDomainExpiration() {
+		t.Error("expected true, got false")
+	}
+}
+
+func TestEndpoint_needsToRetrieveIP(t *testing.T) {
+	if (&Endpoint{Conditions: []Condition{"[STATUS] == 200"}}).needsToRetrieveIP() {
+		t.Error("expected false, got true")
+	}
+	if !(&Endpoint{Conditions: []Condition{"[STATUS] == 200", "[IP] == 127.0.0.1"}}).needsToRetrieveIP() {
 		t.Error("expected true, got false")
 	}
 }

core/health_status.go

@@ -1,11 +0,0 @@
-package core
-
-// HealthStatus is the status of Gatus
-type HealthStatus struct {
-	// Status is the state of Gatus (UP/DOWN)
-	Status string `json:"status"`
-
-	// Message is an accompanying description of why the status is as reported.
-	// If the Status is UP, no message will be provided
-	Message string `json:"message,omitempty"`
-}

core/result.go

@@ -10,6 +10,8 @@ type Result struct {
 	HTTPStatus int `json:"status"`
 
 	// DNSRCode is the response code of a DNS query in a human-readable format
+	//
+	// Possible values: NOERROR, FORMERR, SERVFAIL, NXDOMAIN, NOTIMP, REFUSED
 	DNSRCode string `json:"-"`
 
 	// Hostname extracted from Endpoint.URL
@@ -39,6 +41,9 @@ type Result struct {
 	// CertificateExpiration is the duration before the certificate expires
 	CertificateExpiration time.Duration `json:"-"`
 
+	// DomainExpiration is the duration before the domain expires
+	DomainExpiration time.Duration `json:"-"`
+
 	// body is the response body
 	//
 	// Note that this variable is only used during the evaluation of an Endpoint's health.

core/ui/ui.go

@@ -1,17 +1,60 @@
 package ui
 
+import "errors"
+
 // Config is the UI configuration for core.Endpoint
 type Config struct {
 	// HideHostname whether to hide the hostname in the Result
 	HideHostname bool `yaml:"hide-hostname"`
+
+	// HideURL whether to ensure the URL is not displayed in the results. Useful if the URL contains a token.
+	HideURL bool `yaml:"hide-url"`
+
 	// DontResolveFailedConditions whether to resolve failed conditions in the Result for display in the UI
 	DontResolveFailedConditions bool `yaml:"dont-resolve-failed-conditions"`
+
+	// Badge is the configuration for the badges generated
+	Badge *Badge `yaml:"badge"`
+}
+
+type Badge struct {
+	ResponseTime *ResponseTime `yaml:"response-time"`
+}
+
+type ResponseTime struct {
+	Thresholds []int `yaml:"thresholds"`
+}
+
+var (
+	ErrInvalidBadgeResponseTimeConfig = errors.New("invalid response time badge configuration: expected parameter 'response-time' to have 5 ascending numerical values")
+)
+
+func (config *Config) ValidateAndSetDefaults() error {
+	if config.Badge != nil {
+		if len(config.Badge.ResponseTime.Thresholds) != 5 {
+			return ErrInvalidBadgeResponseTimeConfig
+		}
+		for i := 4; i > 0; i-- {
+			if config.Badge.ResponseTime.Thresholds[i] < config.Badge.ResponseTime.Thresholds[i-1] {
+				return ErrInvalidBadgeResponseTimeConfig
+			}
+		}
+	} else {
+		config.Badge = GetDefaultConfig().Badge
+	}
+	return nil
 }
 
 // GetDefaultConfig retrieves the default UI configuration
 func GetDefaultConfig() *Config {
 	return &Config{
 		HideHostname:                false,
+		HideURL:                     false,
 		DontResolveFailedConditions: false,
+		Badge: &Badge{
+			ResponseTime: &ResponseTime{
+				Thresholds: []int{50, 200, 300, 500, 750},
+			},
+		},
 	}
 }

go.mod

@@ -1,12 +1,12 @@
-module github.com/TwiN/gatus/v3
+module github.com/TwiN/gatus/v4
 
-go 1.17
+go 1.19
 
 require (
-	github.com/TwiN/g8 v1.3.0
+	github.com/TwiN/g8 v1.4.0
-	github.com/TwiN/gocache v1.2.4
+	github.com/TwiN/gocache/v2 v2.1.1
-	github.com/TwiN/gocache/v2 v2.0.0
+	github.com/TwiN/health v1.4.0
-	github.com/TwiN/health v1.3.0
+	github.com/TwiN/whois v1.0.0
 	github.com/coreos/go-oidc/v3 v3.1.0
 	github.com/go-ping/ping v0.0.0-20210911151512-381826476871
 	github.com/google/uuid v1.3.0
@@ -34,7 +34,6 @@ require (
 	github.com/prometheus/common v0.31.1 // indirect
 	github.com/prometheus/procfs v0.7.3 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect
-	go.etcd.io/bbolt v1.3.6 // indirect
 	golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d // indirect
 	golang.org/x/mod v0.5.1 // indirect
 	golang.org/x/net v0.0.0-20211209124913-491a49abca63 // indirect

go.sum

@@ -33,14 +33,14 @@ cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/TwiN/g8 v1.3.0 h1:mNv3R35GhDn1gEV0BKMl1oupZ1tDtOWPTHUKu+W/k3U=
+github.com/TwiN/g8 v1.4.0 h1:RUk5xTtxKCdMo0GGSbBVyjtAAfi2nqVbA9E0C4u5Cxo=
-github.com/TwiN/g8 v1.3.0/go.mod h1:SiIdItS0agSUloFqdQQt/RObB2jGSq+nnE9WfFv3RIo=
+github.com/TwiN/g8 v1.4.0/go.mod h1:ECyGJsoIb99klUfvVQoS1StgRLte9yvvPigGrHdy284=
-github.com/TwiN/gocache v1.2.4 h1:AfJ1YRcxtQ/zZEN61URDwk/dwFG7LSRenU5qIm9dQzo=
+github.com/TwiN/gocache/v2 v2.1.1 h1:W/GLImqa+pZVIH9pcWEn1cBgy1KU66fUcBjOnPhjuno=
-github.com/TwiN/gocache v1.2.4/go.mod h1:BjabsQQy6z5uHDorHa4LJVPEzFeitLIDbCtdv3gc1gA=
+github.com/TwiN/gocache/v2 v2.1.1/go.mod h1:SnUuBsrwGQeNcDG6vhkOMJnqErZM0JGjgIkuKryokYA=
-github.com/TwiN/gocache/v2 v2.0.0 h1:CPbDNKdSJpmBkh7aWcO7D3KK1yWaMlwX+3dsBPE8/so=
+github.com/TwiN/health v1.4.0 h1:Ts7lb4ihYDpVEbFSGAhSEZTSwuDOADnwJLFngFl4xzw=
-github.com/TwiN/gocache/v2 v2.0.0/go.mod h1:j4MABVaia2Tp53ERWc/3l4YxkswtPjB2hQzmL/kD/VQ=
+github.com/TwiN/health v1.4.0/go.mod h1:CSUh+ryfD2POS2vKtc/yO4IxgR58lKvQ0/8qnoPqPqs=
-github.com/TwiN/health v1.3.0 h1:xw90rZqg0NH5MRkVHzlgtDdP+EQd43v3yMqQVtYlGHg=
+github.com/TwiN/whois v1.0.0 h1:I+aQzXLPmhWovkFUzlPV2DdfLZUWDLrkMDlM6QwCv+Q=
-github.com/TwiN/health v1.3.0/go.mod h1:Bt+lEvSi6C/9NWb7OoGmUmgtS4dfPeMM9EINnURv5dE=
+github.com/TwiN/whois v1.0.0/go.mod h1:9WbCzYlR+r5eq9vbgJVh7A4H2uR2ct4wKEB0/QITJ/c=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
@@ -70,8 +70,6 @@ github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymF
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
@@ -83,7 +81,6 @@ github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V
 github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
 github.com/go-ping/ping v0.0.0-20210911151512-381826476871 h1:wtjTfjwAR/BYYMJ+QOLI/3J/qGEI0fgrkZvgsEWK2/Q=
 github.com/go-ping/ping v0.0.0-20210911151512-381826476871/go.mod h1:xIFjORFzTxqIV/tDVGO4eDy/bLuSyawEeojSm3GfRGk=
-github.com/go-redis/redis v6.15.9+incompatible/go.mod h1:NAIEuMOZ/fxfXJIrKDQDz8wamY7mA7PouImQ2Jvg6kA=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 h1:DACJavvAHhabrF08vX0COfcOBJRhZ8lUbR+ZWIs0Y5g=
@@ -149,7 +146,6 @@ github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
 github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
-github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
@@ -187,13 +183,6 @@ github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742/go.mod h1:bx2lN
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
 github.com/mwitkow/go-conntrack v0.0.0-20161129095857-cc309e4a2223/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
 github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
-github.com/nxadm/tail v1.4.4/go.mod h1:kenIhsEOeOJmVchQTgglprH7qJGnHDVpk1VPCcaMI8A=
-github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/ginkgo v1.12.1/go.mod h1:zj2OWP4+oCPe1qIXoGWkgMRwljMUYCdkwsT2108oapk=
-github.com/onsi/ginkgo v1.14.1/go.mod h1:iSB4RoI2tjJc9BBv4NKIKWKya62Rps+oPG/Lv9klQyY=
-github.com/onsi/gomega v1.7.1/go.mod h1:XdKZgCCFLUoM/7CFJVPcG8C1xQ1AJ0vpAezJrB7JYyY=
-github.com/onsi/gomega v1.10.1/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
-github.com/onsi/gomega v1.10.2/go.mod h1:iN09h71vgCQne3DLsj+A5owkum+a2tYe+TOCB1ybHNo=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -233,17 +222,12 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
-github.com/tidwall/redcon v1.3.2/go.mod h1:bdYBm4rlcWpst2XMwKVzWDF9CoUxEbUmM7CQrKeOZas=
 github.com/wcharczuk/go-chart/v2 v2.1.0 h1:tY2slqVQ6bN+yHSnDYwZebLQFkphK4WNrVwnt7CJZ2I=
 github.com/wcharczuk/go-chart/v2 v2.1.0/go.mod h1:yx7MvAVNcP/kN9lKXM/NTce4au4DFN99j6i1OwDclNA=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
-go.etcd.io/bbolt v1.3.5/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
-go.etcd.io/bbolt v1.3.6 h1:/ecaJf0sk1l4l6V4awd65v2C3ILy7MSj+s/x1ADCIMU=
-go.etcd.io/bbolt v1.3.6/go.mod h1:qXsaaIqmgQH0T+OPdb99Bf+PKfBBQVAdyD6TY9G8XM4=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
@@ -289,12 +273,10 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.5.1 h1:OJxoQ/rynoF0dcCdI7cLPktw/hR2cueqYfjm43oqK38=
 golang.org/x/mod v0.5.1/go.mod h1:5OXOZSfqPIIbmVBIIKWRFfZjPR0E5r58TLhUjH0a2Ro=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -318,7 +300,6 @@ golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200505041828-1ed23360d12c/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200506145744-7e3656a0809f/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
-golang.org/x/net v0.0.0-20200520004742-59133d7f0dd7/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
@@ -327,7 +308,6 @@ golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
 golang.org/x/net v0.0.0-20210316092652-d523dce5a7f4/go.mod h1:RBQZq4jEuRlivfhVLdyRGr576XBO4/greRjx4P4O3yc=
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20211209124913-491a49abca63 h1:iocB37TsdFuN6IBRZ+ry36wrkoV51/tl5vOWqkcPGvY=
 golang.org/x/net v0.0.0-20211209124913-491a49abca63/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
@@ -351,7 +331,6 @@ golang.org/x/sync v0.0.0-20210220032951-036812b2e83c h1:5KslGYwFpkhGh+Q16bwMP3cO
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190312061237-fead79001313/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -362,10 +341,7 @@ golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190624142023-c5567b49c5d0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190726091711-fc99dfbffb4e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20190904154756-749cb33beabd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191001151750-bb3f8db39f24/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191204072324-ce4227a45e2e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191228213918-04cbcbbfeed8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200106162015-b016eb3dc98e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -381,12 +357,10 @@ golang.org/x/sys v0.0.0-20200331124033-c3d80250170d/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200501052902-10377860bb8e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200511232937-7e40ca221e25/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200515095857-1151b9dac4a9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200615200032-f1bc736245b1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200923182605-d9f96fdee20d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201126233918-771906719818/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -396,7 +370,6 @@ golang.org/x/sys v0.0.0-20210315160823-c6e025ad8005/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210902050250-f475640dd07b/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20211003122950-b1ebd4e1001c h1:EyJTLQbOxvk8V6oDdD8ILR1BOs3nEJXThD6aqsiPNkM=
 golang.org/x/sys v0.0.0-20211003122950-b1ebd4e1001c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -544,12 +517,10 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
-gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/mail.v2 v2.3.1 h1:WYFn/oANrAGP2C0dcV6/pbkPzv8yGzqTjPmTeO7qoXk=
 gopkg.in/mail.v2 v2.3.1/go.mod h1:htwXN1Qh09vZJ1NVKxQqHPBaCBbzKhp5GzuJEA4VJWw=
 gopkg.in/square/go-jose.v2 v2.5.1 h1:7odma5RETjNHWJnR32wx8t+Io4djHE1PqxCFx3iiZ2w=
 gopkg.in/square/go-jose.v2 v2.5.1/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

main.go

@@ -7,10 +7,10 @@ import (
 	"syscall"
 	"time"
 
-	"github.com/TwiN/gatus/v3/config"
+	"github.com/TwiN/gatus/v4/config"
-	"github.com/TwiN/gatus/v3/controller"
+	"github.com/TwiN/gatus/v4/controller"
-	"github.com/TwiN/gatus/v3/storage/store"
+	"github.com/TwiN/gatus/v4/storage/store"
-	"github.com/TwiN/gatus/v3/watchdog"
+	"github.com/TwiN/gatus/v4/watchdog"
 )
 
 func main() {
@@ -36,7 +36,7 @@ func main() {
 }
 
 func start(cfg *config.Config) {
-	go controller.Handle(cfg.Security, cfg.Web, cfg.UI, cfg.Metrics)
+	go controller.Handle(cfg)
 	watchdog.Monitor(cfg)
 	go listenToConfigurationFileChanges(cfg)
 }

metric/metric.go

@@ -1,27 +0,0 @@
-package metric
-
-import (
-	"strconv"
-
-	"github.com/TwiN/gatus/v3/core"
-	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promauto"
-)
-
-var (
-	// This will be initialized once PublishMetricsForEndpoint.
-	// The reason why we're doing this is that if metrics are disabled, we don't want to initialize it unnecessarily.
-	resultCount *prometheus.CounterVec = nil
-)
-
-// PublishMetricsForEndpoint publishes metrics for the given endpoint and its result.
-// These metrics will be exposed at /metrics if the metrics are enabled
-func PublishMetricsForEndpoint(endpoint *core.Endpoint, result *core.Result) {
-	if resultCount == nil {
-		resultCount = promauto.NewCounterVec(prometheus.CounterOpts{
-			Name: "gatus_results_total",
-			Help: "Number of results per endpoint",
-		}, []string{"key", "group", "name", "success"})
-	}
-	resultCount.WithLabelValues(endpoint.Key(), endpoint.Group, endpoint.Name, strconv.FormatBool(result.Success)).Inc()
-}

metrics/metrics.go

@@ -0,0 +1,73 @@
+package metrics
+
+import (
+	"strconv"
+
+	"github.com/TwiN/gatus/v4/core"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+const namespace = "gatus" // The prefix of the metrics
+
+var (
+	initializedMetrics bool // Whether the metrics have been initialized
+
+	resultTotal                        *prometheus.CounterVec
+	resultDurationSeconds              *prometheus.GaugeVec
+	resultConnectedTotal               *prometheus.CounterVec
+	resultCodeTotal                    *prometheus.CounterVec
+	resultCertificateExpirationSeconds *prometheus.GaugeVec
+)
+
+func initializePrometheusMetrics() {
+	resultTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: namespace,
+		Name:      "results_total",
+		Help:      "Number of results per endpoint",
+	}, []string{"key", "group", "name", "type", "success"})
+	resultDurationSeconds = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: namespace,
+		Name:      "results_duration_seconds",
+		Help:      "Duration of the request in seconds",
+	}, []string{"key", "group", "name", "type"})
+	resultConnectedTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: namespace,
+		Name:      "results_connected_total",
+		Help:      "Total number of results in which a connection was successfully established",
+	}, []string{"key", "group", "name", "type"})
+	resultCodeTotal = promauto.NewCounterVec(prometheus.CounterOpts{
+		Namespace: namespace,
+		Name:      "results_code_total",
+		Help:      "Total number of results by code",
+	}, []string{"key", "group", "name", "type", "code"})
+	resultCertificateExpirationSeconds = promauto.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: namespace,
+		Name:      "results_certificate_expiration_seconds",
+		Help:      "Number of seconds until the certificate expires",
+	}, []string{"key", "group", "name", "type"})
+}
+
+// PublishMetricsForEndpoint publishes metrics for the given endpoint and its result.
+// These metrics will be exposed at /metrics if the metrics are enabled
+func PublishMetricsForEndpoint(endpoint *core.Endpoint, result *core.Result) {
+	if !initializedMetrics {
+		initializePrometheusMetrics()
+		initializedMetrics = true
+	}
+	endpointType := endpoint.Type()
+	resultTotal.WithLabelValues(endpoint.Key(), endpoint.Group, endpoint.Name, string(endpointType), strconv.FormatBool(result.Success)).Inc()
+	resultDurationSeconds.WithLabelValues(endpoint.Key(), endpoint.Group, endpoint.Name, string(endpointType)).Set(result.Duration.Seconds())
+	if result.Connected {
+		resultConnectedTotal.WithLabelValues(endpoint.Key(), endpoint.Group, endpoint.Name, string(endpointType)).Inc()
+	}
+	if result.DNSRCode != "" {
+		resultCodeTotal.WithLabelValues(endpoint.Key(), endpoint.Group, endpoint.Name, string(endpointType), result.DNSRCode).Inc()
+	}
+	if result.HTTPStatus != 0 {
+		resultCodeTotal.WithLabelValues(endpoint.Key(), endpoint.Group, endpoint.Name, string(endpointType), strconv.Itoa(result.HTTPStatus)).Inc()
+	}
+	if result.CertificateExpiration != 0 {
+		resultCertificateExpirationSeconds.WithLabelValues(endpoint.Key(), endpoint.Group, endpoint.Name, string(endpointType)).Set(result.CertificateExpiration.Seconds())
+	}
+}

metrics/metrics_test.go

@@ -0,0 +1,116 @@
+package metrics
+
+import (
+	"bytes"
+	"testing"
+	"time"
+
+	"github.com/TwiN/gatus/v4/core"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/testutil"
+)
+
+func TestPublishMetricsForEndpoint(t *testing.T) {
+	httpEndpoint := &core.Endpoint{Name: "http-ep-name", Group: "http-ep-group", URL: "https://example.org"}
+	PublishMetricsForEndpoint(httpEndpoint, &core.Result{
+		HTTPStatus: 200,
+		Connected:  true,
+		Duration:   123 * time.Millisecond,
+		ConditionResults: []*core.ConditionResult{
+			{Condition: "[STATUS] == 200", Success: true},
+			{Condition: "[CERTIFICATE_EXPIRATION] > 48h", Success: true},
+		},
+		Success:               true,
+		CertificateExpiration: 49 * time.Hour,
+	})
+	err := testutil.GatherAndCompare(prometheus.Gatherers{prometheus.DefaultGatherer}, bytes.NewBufferString(`
+# HELP gatus_results_certificate_expiration_seconds Number of seconds until the certificate expires
+# TYPE gatus_results_certificate_expiration_seconds gauge
+gatus_results_certificate_expiration_seconds{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 176400
+# HELP gatus_results_code_total Total number of results by code
+# TYPE gatus_results_code_total counter
+gatus_results_code_total{code="200",group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 1
+# HELP gatus_results_connected_total Total number of results in which a connection was successfully established
+# TYPE gatus_results_connected_total counter
+gatus_results_connected_total{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 1
+# HELP gatus_results_duration_seconds Duration of the request in seconds
+# TYPE gatus_results_duration_seconds gauge
+gatus_results_duration_seconds{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 0.123
+# HELP gatus_results_total Number of results per endpoint
+# TYPE gatus_results_total counter
+gatus_results_total{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",success="true",type="HTTP"} 1
+`), "gatus_results_code_total", "gatus_results_connected_total", "gatus_results_duration_seconds", "gatus_results_total", "gatus_results_certificate_expiration_seconds")
+	if err != nil {
+		t.Errorf("Expected no errors but got: %v", err)
+	}
+	PublishMetricsForEndpoint(httpEndpoint, &core.Result{
+		HTTPStatus: 200,
+		Connected:  true,
+		Duration:   125 * time.Millisecond,
+		ConditionResults: []*core.ConditionResult{
+			{Condition: "[STATUS] == 200", Success: true},
+			{Condition: "[CERTIFICATE_EXPIRATION] > 47h", Success: false},
+		},
+		Success:               false,
+		CertificateExpiration: 47 * time.Hour,
+	})
+	err = testutil.GatherAndCompare(prometheus.Gatherers{prometheus.DefaultGatherer}, bytes.NewBufferString(`
+# HELP gatus_results_certificate_expiration_seconds Number of seconds until the certificate expires
+# TYPE gatus_results_certificate_expiration_seconds gauge
+gatus_results_certificate_expiration_seconds{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 169200
+# HELP gatus_results_code_total Total number of results by code
+# TYPE gatus_results_code_total counter
+gatus_results_code_total{code="200",group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 2
+# HELP gatus_results_connected_total Total number of results in which a connection was successfully established
+# TYPE gatus_results_connected_total counter
+gatus_results_connected_total{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 2
+# HELP gatus_results_duration_seconds Duration of the request in seconds
+# TYPE gatus_results_duration_seconds gauge
+gatus_results_duration_seconds{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 0.125
+# HELP gatus_results_total Number of results per endpoint
+# TYPE gatus_results_total counter
+gatus_results_total{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",success="false",type="HTTP"} 1
+gatus_results_total{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",success="true",type="HTTP"} 1
+`), "gatus_results_code_total", "gatus_results_connected_total", "gatus_results_duration_seconds", "gatus_results_total", "gatus_results_certificate_expiration_seconds")
+	if err != nil {
+		t.Errorf("Expected no errors but got: %v", err)
+	}
+	dnsEndpoint := &core.Endpoint{Name: "dns-ep-name", Group: "dns-ep-group", URL: "1.1.1.1", DNS: &core.DNS{
+		QueryType: "A",
+		QueryName: "example.com.",
+	}}
+	PublishMetricsForEndpoint(dnsEndpoint, &core.Result{
+		DNSRCode:  "NOERROR",
+		Connected: true,
+		Duration:  50 * time.Millisecond,
+		ConditionResults: []*core.ConditionResult{
+			{Condition: "[DNS_RCODE] == NOERROR", Success: true},
+		},
+		Success: true,
+	})
+	err = testutil.GatherAndCompare(prometheus.Gatherers{prometheus.DefaultGatherer}, bytes.NewBufferString(`
+# HELP gatus_results_certificate_expiration_seconds Number of seconds until the certificate expires
+# TYPE gatus_results_certificate_expiration_seconds gauge
+gatus_results_certificate_expiration_seconds{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 169200
+# HELP gatus_results_code_total Total number of results by code
+# TYPE gatus_results_code_total counter
+gatus_results_code_total{code="200",group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 2
+gatus_results_code_total{code="NOERROR",group="dns-ep-group",key="dns-ep-group_dns-ep-name",name="dns-ep-name",type="DNS"} 1
+# HELP gatus_results_connected_total Total number of results in which a connection was successfully established
+# TYPE gatus_results_connected_total counter
+gatus_results_connected_total{group="dns-ep-group",key="dns-ep-group_dns-ep-name",name="dns-ep-name",type="DNS"} 1
+gatus_results_connected_total{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 2
+# HELP gatus_results_duration_seconds Duration of the request in seconds
+# TYPE gatus_results_duration_seconds gauge
+gatus_results_duration_seconds{group="dns-ep-group",key="dns-ep-group_dns-ep-name",name="dns-ep-name",type="DNS"} 0.05
+gatus_results_duration_seconds{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",type="HTTP"} 0.125
+# HELP gatus_results_total Number of results per endpoint
+# TYPE gatus_results_total counter
+gatus_results_total{group="dns-ep-group",key="dns-ep-group_dns-ep-name",name="dns-ep-name",success="true",type="DNS"} 1
+gatus_results_total{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",success="false",type="HTTP"} 1
+gatus_results_total{group="http-ep-group",key="http-ep-group_http-ep-name",name="http-ep-name",success="true",type="HTTP"} 1
+`), "gatus_results_code_total", "gatus_results_connected_total", "gatus_results_duration_seconds", "gatus_results_total", "gatus_results_certificate_expiration_seconds")
+	if err != nil {
+		t.Errorf("Expected no errors but got: %v", err)
+	}
+}

security/basic.go

@@ -1,17 +1,10 @@
 package security
 
-import "log"
-
 // BasicConfig is the configuration for Basic authentication
 type BasicConfig struct {
 	// Username is the name which will need to be used for a successful authentication
 	Username string `yaml:"username"`
 
-	// PasswordSha512Hash is the SHA512 hash of the password which will need to be used for a successful authentication
-	// XXX: Remove this on v4.0.0
-	// Deprecated: Use PasswordBcryptHashBase64Encoded instead
-	PasswordSha512Hash string `yaml:"password-sha512"`
-
 	// PasswordBcryptHashBase64Encoded is the base64 encoded string of the Bcrypt hash of the password to use to
 	// authenticate using basic auth.
 	PasswordBcryptHashBase64Encoded string `yaml:"password-bcrypt-base64"`
@@ -19,8 +12,5 @@ type BasicConfig struct {
 
 // isValid returns whether the basic security configuration is valid or not
 func (c *BasicConfig) isValid() bool {
-	if len(c.PasswordSha512Hash) > 0 {
+	return len(c.Username) > 0 && len(c.PasswordBcryptHashBase64Encoded) > 0
-		log.Println("WARNING: security.basic.password-sha512 has been deprecated in favor of security.basic.password-bcrypt-base64")
-	}
-	return len(c.Username) > 0 && (len(c.PasswordSha512Hash) == 128 || len(c.PasswordBcryptHashBase64Encoded) > 0)
 }

security/basic_test.go

@@ -2,26 +2,6 @@ package security
 
 import "testing"
 
-func TestBasicConfig_IsValidUsingSHA512(t *testing.T) {
-	basicConfig := &BasicConfig{
-		Username:           "admin",
-		PasswordSha512Hash: Sha512("test"),
-	}
-	if !basicConfig.isValid() {
-		t.Error("basicConfig should've been valid")
-	}
-}
-
-func TestBasicConfig_IsValidWhenPasswordIsInvalidUsingSHA512(t *testing.T) {
-	basicConfig := &BasicConfig{
-		Username:           "admin",
-		PasswordSha512Hash: "",
-	}
-	if basicConfig.isValid() {
-		t.Error("basicConfig shouldn't have been valid")
-	}
-}
-
 func TestBasicConfig_IsValidUsingBcrypt(t *testing.T) {
 	basicConfig := &BasicConfig{
 		Username:                        "admin",

security/config.go

@@ -3,7 +3,6 @@ package security
 import (
 	"encoding/base64"
 	"net/http"
-	"strings"
 
 	"github.com/TwiN/g8"
 	"github.com/gorilla/mux"
@@ -82,13 +81,6 @@ func (c *Config) ApplySecurityMiddleware(api *mux.Router) error {
 						_, _ = w.Write([]byte("Unauthorized"))
 						return
 					}
-				} else if len(c.Basic.PasswordSha512Hash) > 0 {
-					if !ok || usernameEntered != c.Basic.Username || Sha512(passwordEntered) != strings.ToLower(c.Basic.PasswordSha512Hash) {
-						w.Header().Set("WWW-Authenticate", "Basic")
-						w.WriteHeader(http.StatusUnauthorized)
-						_, _ = w.Write([]byte("Unauthorized"))
-						return
-					}
 				}
 				handler.ServeHTTP(w, r)
 			})