Rename restapi to api (#3176)

Signed-off-by: Daniel Valdivia <18384552+dvaldivia@users.noreply.github.com>

api/admin_trace.go

@@ -0,0 +1,154 @@
+// This file is part of MinIO Console Server
+// Copyright (c) 2021 MinIO, Inc.
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/minio/madmin-go/v3"
+	"github.com/minio/websocket"
+)
+
+// shortTraceMsg Short trace record
+type shortTraceMsg struct {
+	Host       string    `json:"host"`
+	Time       string    `json:"time"`
+	Client     string    `json:"client"`
+	CallStats  callStats `json:"callStats"`
+	FuncName   string    `json:"api"`
+	Path       string    `json:"path"`
+	Query      string    `json:"query"`
+	StatusCode int       `json:"statusCode"`
+	StatusMsg  string    `json:"statusMsg"`
+}
+
+type callStats struct {
+	Rx       int    `json:"rx"`
+	Tx       int    `json:"tx"`
+	Duration string `json:"duration"`
+	Ttfb     string `json:"timeToFirstByte"`
+}
+
+// trace filters
+func matchTrace(opts TraceRequest, traceInfo madmin.ServiceTraceInfo) bool {
+	statusCode := int(opts.statusCode)
+	method := opts.method
+	funcName := opts.funcName
+	apiPath := opts.path
+
+	if statusCode == 0 && method == "" && funcName == "" && apiPath == "" {
+		// no specific filtering found trace all the requests
+		return true
+	}
+
+	// Filter request path if passed by the user
+	if apiPath != "" {
+		pathToLookup := strings.ToLower(apiPath)
+		pathFromTrace := strings.ToLower(traceInfo.Trace.Path)
+
+		return strings.Contains(pathFromTrace, pathToLookup)
+	}
+
+	// Filter response status codes if passed by the user
+	if statusCode > 0 && traceInfo.Trace.HTTP != nil {
+		statusCodeFromTrace := traceInfo.Trace.HTTP.RespInfo.StatusCode
+
+		return statusCodeFromTrace == statusCode
+	}
+
+	// Filter request method if passed by the user
+	if method != "" && traceInfo.Trace.HTTP != nil {
+		methodFromTrace := traceInfo.Trace.HTTP.ReqInfo.Method
+
+		return methodFromTrace == method
+	}
+
+	if funcName != "" {
+		funcToLookup := strings.ToLower(funcName)
+		funcFromTrace := strings.ToLower(traceInfo.Trace.FuncName)
+
+		return strings.Contains(funcFromTrace, funcToLookup)
+	}
+
+	return true
+}
+
+// startTraceInfo starts trace of the servers
+func startTraceInfo(ctx context.Context, conn WSConn, client MinioAdmin, opts TraceRequest) error {
+	// Start listening on all trace activity.
+	traceCh := client.serviceTrace(ctx, opts.threshold, opts.s3, opts.internal, opts.storage, opts.os, opts.onlyErrors)
+	for {
+		select {
+		case <-ctx.Done():
+			return nil
+		case traceInfo, ok := <-traceCh:
+			// zero value returned because the channel is closed and empty
+			if !ok {
+				return nil
+			}
+			if traceInfo.Err != nil {
+				LogError("error on serviceTrace: %v", traceInfo.Err)
+				return traceInfo.Err
+			}
+			if matchTrace(opts, traceInfo) {
+				// Serialize message to be sent
+				traceInfoBytes, err := json.Marshal(shortTrace(&traceInfo))
+				if err != nil {
+					LogError("error on json.Marshal: %v", err)
+					return err
+				}
+				// Send Message through websocket connection
+				err = conn.writeMessage(websocket.TextMessage, traceInfoBytes)
+				if err != nil {
+					LogError("error writeMessage: %v", err)
+					return err
+				}
+			}
+		}
+	}
+}
+
+// shortTrace creates a shorter Trace Info message.
+// Same implementation as github/minio/mc/cmd/admin-trace.go
+func shortTrace(info *madmin.ServiceTraceInfo) shortTraceMsg {
+	t := info.Trace
+	s := shortTraceMsg{}
+
+	s.Time = t.Time.Format(time.RFC3339)
+	s.Path = t.Path
+	s.FuncName = t.FuncName
+	s.CallStats.Duration = t.Duration.String()
+	if info.Trace.HTTP != nil {
+		s.Query = t.HTTP.ReqInfo.RawQuery
+		s.StatusCode = t.HTTP.RespInfo.StatusCode
+		s.StatusMsg = http.StatusText(t.HTTP.RespInfo.StatusCode)
+		s.CallStats.Rx = t.HTTP.CallStats.InputBytes
+		s.CallStats.Tx = t.HTTP.CallStats.OutputBytes
+		s.CallStats.Ttfb = t.HTTP.CallStats.TimeToFirstByte.String()
+		if host, ok := t.HTTP.ReqInfo.Headers["Host"]; ok {
+			s.Host = strings.Join(host, "")
+		}
+		cSlice := strings.Split(t.HTTP.ReqInfo.Client, ":")
+		s.Client = cSlice[0]
+	}
+
+	return s
+}