Add download objects api and integrate it with UI (#321)

portal-ui/src/screens/Console/Buckets/ListBuckets/ListBuckets.tsx

@@ -33,7 +33,6 @@ import { CreateIcon } from "../../../../icons";
 import { niceBytes } from "../../../../common/utils";
 import { AppState } from "../../../../store";
 import { connect } from "react-redux";
-import { logMessageReceived, logResetMessages } from "../../Logs/actions";
 import { addBucketOpen, addBucketReset } from "../actions";
 import {
   actionsTray,

portal-ui/src/screens/Console/Buckets/ListBuckets/Objects/ListObjects/DeleteObject.tsx

@@ -26,7 +26,6 @@ import {
   LinearProgress,
 } from "@material-ui/core";
 import api from "../../../../../../common/api";
-import { BucketObjectsList } from "../ListObjects/types";
 import Typography from "@material-ui/core/Typography";
 
 const styles = (theme: Theme) =>
@@ -68,13 +67,14 @@ class DeleteObject extends React.Component<
     if (selectedObject.endsWith("/")) {
       recursive = true;
     }
+
     this.setState({ deleteLoading: true }, () => {
       api
         .invoke(
           "DELETE",
           `/api/v1/buckets/${selectedBucket}/objects?path=${selectedObject}&recursive=${recursive}`
         )
-        .then((res: BucketObjectsList) => {
+        .then((res: any) => {
           this.setState(
             {
               deleteLoading: false,
@@ -142,10 +142,12 @@ class DeleteObject extends React.Component<
           </Button>
           <Button
             onClick={() => {
-              this.removeRecord();
+              this.setState({ deleteError: "" }, () => {
+                this.removeRecord();
+              });
             }}
             color="secondary"
-            autoFocus
+            disabled={deleteLoading}
           >
             Delete
           </Button>

portal-ui/src/screens/Console/Buckets/ListBuckets/Objects/ListObjects/ListObjects.tsx

@@ -36,6 +36,7 @@ import {
   searchField,
 } from "../../../../Common/FormComponents/common/styleLibrary";
 import PageHeader from "../../../../Common/PageHeader/PageHeader";
+import storage from "local-storage-fallback";
 
 const styles = (theme: Theme) =>
   createStyles({
@@ -140,6 +141,38 @@ class ListObjects extends React.Component<
     });
   }
 
+  download(bucketName: string, objectName: string) {
+    var anchor = document.createElement("a");
+    document.body.appendChild(anchor);
+    const token: string = storage.getItem("token")!;
+    var xhr = new XMLHttpRequest();
+
+    xhr.open(
+      "GET",
+      `/api/v1/buckets/${bucketName}/objects/download?prefix=${objectName}`,
+      true
+    );
+    xhr.setRequestHeader("Authorization", `Bearer ${token}`);
+    xhr.responseType = "blob";
+
+    xhr.onload = function(e) {
+      if (this.status == 200) {
+        var blob = new Blob([this.response], {
+          type: "octet/stream",
+        });
+        var blobUrl = window.URL.createObjectURL(blob);
+
+        anchor.href = blobUrl;
+        anchor.download = objectName;
+
+        anchor.click();
+        window.URL.revokeObjectURL(blobUrl);
+        anchor.remove();
+      }
+    };
+    xhr.send();
+  }
+
   bucketFilter(): void {}
 
   render() {
@@ -160,7 +193,12 @@ class ListObjects extends React.Component<
       this.setState({ deleteOpen: true, selectedObject: object });
     };
 
+    const downloadObject = (object: string) => {
+      this.download(selectedBucket, object);
+    };
+
     const tableActions = [
+      { type: "download", onClick: downloadObject, sendOnlyId: true },
       { type: "delete", onClick: confirmDeleteObject, sendOnlyId: true },
     ];
 

portal-ui/src/screens/Console/Common/TableWrapper/TableActionButton.tsx

@@ -22,6 +22,8 @@ import DeleteIcon from "./TableActionIcons/DeleteIcon";
 import DescriptionIcon from "./TableActionIcons/DescriptionIcon";
 import CloudIcon from "./TableActionIcons/CloudIcon";
 import ConsoleIcon from "./TableActionIcons/ConsoleIcon";
+import GetAppIcon from "@material-ui/icons/GetApp";
+import SvgIcon from "@material-ui/core/SvgIcon";
 import { Link } from "react-router-dom";
 
 interface IActionButton {
@@ -48,6 +50,10 @@ const defineIcon = (type: string, selected: boolean) => {
       return <CloudIcon active={selected} />;
     case "console":
       return <ConsoleIcon active={selected} />;
+    case "download":
+      return (
+        <SvgIcon component={GetAppIcon} fontSize="small" color="primary" />
+      );
   }
 
   return null;

restapi/client.go

@@ -19,6 +19,7 @@ package restapi
 import (
 	"context"
 	"fmt"
+	"io"
 	"strings"
 	"time"
 
@@ -136,6 +137,7 @@ type MCClient interface {
 	watch(ctx context.Context, options mc.WatchOptions) (*mc.WatchObject, *probe.Error)
 	remove(ctx context.Context, isIncomplete, isRemoveBucket, isBypass bool, contentCh <-chan *mc.ClientContent) <-chan *probe.Error
 	list(ctx context.Context, opts mc.ListOptions) <-chan *mc.ClientContent
+	get(ctx context.Context, opts mc.GetOptions) (io.ReadCloser, *probe.Error)
 }
 
 // Interface implementation
@@ -172,6 +174,10 @@ func (c mcClient) list(ctx context.Context, opts mc.ListOptions) <-chan *mc.Clie
 	return c.client.List(ctx, opts)
 }
 
+func (c mcClient) get(ctx context.Context, opts mc.GetOptions) (io.ReadCloser, *probe.Error) {
+	return c.client.Get(ctx, opts)
+}
+
 // ConsoleCredentials interface with all functions to be implemented
 // by mock when testing, it should include all needed consoleCredentials.Login api calls
 // that are used within this project.

restapi/embedded_spec.go

@@ -429,6 +429,46 @@ func init() {
         }
       }
     },
+    "/buckets/{bucket_name}/objects/download": {
+      "get": {
+        "produces": [
+          "application/octet-stream"
+        ],
+        "tags": [
+          "UserAPI"
+        ],
+        "summary": "Download Object",
+        "operationId": "Download Object",
+        "parameters": [
+          {
+            "type": "string",
+            "name": "bucket_name",
+            "in": "path",
+            "required": true
+          },
+          {
+            "type": "string",
+            "name": "prefix",
+            "in": "query",
+            "required": true
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "type": "file"
+            }
+          },
+          "default": {
+            "description": "Generic error response.",
+            "schema": {
+              "$ref": "#/definitions/error"
+            }
+          }
+        }
+      }
+    },
     "/buckets/{bucket_name}/replication": {
       "get": {
         "tags": [
@@ -4840,6 +4880,46 @@ func init() {
         }
       }
     },
+    "/buckets/{bucket_name}/objects/download": {
+      "get": {
+        "produces": [
+          "application/octet-stream"
+        ],
+        "tags": [
+          "UserAPI"
+        ],
+        "summary": "Download Object",
+        "operationId": "Download Object",
+        "parameters": [
+          {
+            "type": "string",
+            "name": "bucket_name",
+            "in": "path",
+            "required": true
+          },
+          {
+            "type": "string",
+            "name": "prefix",
+            "in": "query",
+            "required": true
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "A successful response.",
+            "schema": {
+              "type": "file"
+            }
+          },
+          "default": {
+            "description": "Generic error response.",
+            "schema": {
+              "$ref": "#/definitions/error"
+            }
+          }
+        }
+      }
+    },
     "/buckets/{bucket_name}/replication": {
       "get": {
         "tags": [

restapi/operations/console_api.go

@@ -126,6 +126,9 @@ func NewConsoleAPI(spec *loads.Document) *ConsoleAPI {
 		AdminAPIDeleteTenantHandler: admin_api.DeleteTenantHandlerFunc(func(params admin_api.DeleteTenantParams, principal *models.Principal) middleware.Responder {
 			return middleware.NotImplemented("operation admin_api.DeleteTenant has not yet been implemented")
 		}),
+		UserAPIDownloadObjectHandler: user_api.DownloadObjectHandlerFunc(func(params user_api.DownloadObjectParams, principal *models.Principal) middleware.Responder {
+			return middleware.NotImplemented("operation user_api.DownloadObject has not yet been implemented")
+		}),
 		UserAPIGetBucketQuotaHandler: user_api.GetBucketQuotaHandlerFunc(func(params user_api.GetBucketQuotaParams, principal *models.Principal) middleware.Responder {
 			return middleware.NotImplemented("operation user_api.GetBucketQuota has not yet been implemented")
 		}),
@@ -364,6 +367,8 @@ type ConsoleAPI struct {
 	UserAPIDeleteServiceAccountHandler user_api.DeleteServiceAccountHandler
 	// AdminAPIDeleteTenantHandler sets the operation handler for the delete tenant operation
 	AdminAPIDeleteTenantHandler admin_api.DeleteTenantHandler
+	// UserAPIDownloadObjectHandler sets the operation handler for the download object operation
+	UserAPIDownloadObjectHandler user_api.DownloadObjectHandler
 	// UserAPIGetBucketQuotaHandler sets the operation handler for the get bucket quota operation
 	UserAPIGetBucketQuotaHandler user_api.GetBucketQuotaHandler
 	// UserAPIGetBucketReplicationHandler sets the operation handler for the get bucket replication operation
@@ -598,6 +603,9 @@ func (o *ConsoleAPI) Validate() error {
 	if o.AdminAPIDeleteTenantHandler == nil {
 		unregistered = append(unregistered, "admin_api.DeleteTenantHandler")
 	}
+	if o.UserAPIDownloadObjectHandler == nil {
+		unregistered = append(unregistered, "user_api.DownloadObjectHandler")
+	}
 	if o.UserAPIGetBucketQuotaHandler == nil {
 		unregistered = append(unregistered, "user_api.GetBucketQuotaHandler")
 	}
@@ -932,6 +940,10 @@ func (o *ConsoleAPI) initHandlerCache() {
 	if o.handlers["GET"] == nil {
 		o.handlers["GET"] = make(map[string]http.Handler)
 	}
+	o.handlers["GET"]["/buckets/{bucket_name}/objects/download"] = user_api.NewDownloadObject(o.context, o.UserAPIDownloadObjectHandler)
+	if o.handlers["GET"] == nil {
+		o.handlers["GET"] = make(map[string]http.Handler)
+	}
 	o.handlers["GET"]["/buckets/{name}/quota"] = user_api.NewGetBucketQuota(o.context, o.UserAPIGetBucketQuotaHandler)
 	if o.handlers["GET"] == nil {
 		o.handlers["GET"] = make(map[string]http.Handler)

restapi/operations/user_api/download_object.go

@@ -0,0 +1,90 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 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 user_api
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the generate command
+
+import (
+	"net/http"
+
+	"github.com/go-openapi/runtime/middleware"
+
+	"github.com/minio/console/models"
+)
+
+// DownloadObjectHandlerFunc turns a function with the right signature into a download object handler
+type DownloadObjectHandlerFunc func(DownloadObjectParams, *models.Principal) middleware.Responder
+
+// Handle executing the request and returning a response
+func (fn DownloadObjectHandlerFunc) Handle(params DownloadObjectParams, principal *models.Principal) middleware.Responder {
+	return fn(params, principal)
+}
+
+// DownloadObjectHandler interface for that can handle valid download object params
+type DownloadObjectHandler interface {
+	Handle(DownloadObjectParams, *models.Principal) middleware.Responder
+}
+
+// NewDownloadObject creates a new http.Handler for the download object operation
+func NewDownloadObject(ctx *middleware.Context, handler DownloadObjectHandler) *DownloadObject {
+	return &DownloadObject{Context: ctx, Handler: handler}
+}
+
+/*DownloadObject swagger:route GET /buckets/{bucket_name}/objects/download UserAPI downloadObject
+
+Download Object
+
+*/
+type DownloadObject struct {
+	Context *middleware.Context
+	Handler DownloadObjectHandler
+}
+
+func (o *DownloadObject) ServeHTTP(rw http.ResponseWriter, r *http.Request) {
+	route, rCtx, _ := o.Context.RouteInfo(r)
+	if rCtx != nil {
+		r = rCtx
+	}
+	var Params = NewDownloadObjectParams()
+
+	uprinc, aCtx, err := o.Context.Authorize(r, route)
+	if err != nil {
+		o.Context.Respond(rw, r, route.Produces, route, err)
+		return
+	}
+	if aCtx != nil {
+		r = aCtx
+	}
+	var principal *models.Principal
+	if uprinc != nil {
+		principal = uprinc.(*models.Principal) // this is really a models.Principal, I promise
+	}
+
+	if err := o.Context.BindValidRequest(r, route, &Params); err != nil { // bind params
+		o.Context.Respond(rw, r, route.Produces, route, err)
+		return
+	}
+
+	res := o.Handler.Handle(Params, principal) // actually handle the request
+
+	o.Context.Respond(rw, r, route.Produces, route, res)
+
+}

restapi/operations/user_api/download_object_parameters.go

@@ -0,0 +1,124 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 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 user_api
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"net/http"
+
+	"github.com/go-openapi/errors"
+	"github.com/go-openapi/runtime"
+	"github.com/go-openapi/runtime/middleware"
+	"github.com/go-openapi/strfmt"
+	"github.com/go-openapi/validate"
+)
+
+// NewDownloadObjectParams creates a new DownloadObjectParams object
+// no default values defined in spec.
+func NewDownloadObjectParams() DownloadObjectParams {
+
+	return DownloadObjectParams{}
+}
+
+// DownloadObjectParams contains all the bound params for the download object operation
+// typically these are obtained from a http.Request
+//
+// swagger:parameters Download Object
+type DownloadObjectParams struct {
+
+	// HTTP Request Object
+	HTTPRequest *http.Request `json:"-"`
+
+	/*
+	  Required: true
+	  In: path
+	*/
+	BucketName string
+	/*
+	  Required: true
+	  In: query
+	*/
+	Prefix string
+}
+
+// BindRequest both binds and validates a request, it assumes that complex things implement a Validatable(strfmt.Registry) error interface
+// for simple values it will use straight method calls.
+//
+// To ensure default values, the struct must have been initialized with NewDownloadObjectParams() beforehand.
+func (o *DownloadObjectParams) BindRequest(r *http.Request, route *middleware.MatchedRoute) error {
+	var res []error
+
+	o.HTTPRequest = r
+
+	qs := runtime.Values(r.URL.Query())
+
+	rBucketName, rhkBucketName, _ := route.Params.GetOK("bucket_name")
+	if err := o.bindBucketName(rBucketName, rhkBucketName, route.Formats); err != nil {
+		res = append(res, err)
+	}
+
+	qPrefix, qhkPrefix, _ := qs.GetOK("prefix")
+	if err := o.bindPrefix(qPrefix, qhkPrefix, route.Formats); err != nil {
+		res = append(res, err)
+	}
+
+	if len(res) > 0 {
+		return errors.CompositeValidationError(res...)
+	}
+	return nil
+}
+
+// bindBucketName binds and validates parameter BucketName from path.
+func (o *DownloadObjectParams) bindBucketName(rawData []string, hasKey bool, formats strfmt.Registry) error {
+	var raw string
+	if len(rawData) > 0 {
+		raw = rawData[len(rawData)-1]
+	}
+
+	// Required: true
+	// Parameter is provided by construction from the route
+
+	o.BucketName = raw
+
+	return nil
+}
+
+// bindPrefix binds and validates parameter Prefix from query.
+func (o *DownloadObjectParams) bindPrefix(rawData []string, hasKey bool, formats strfmt.Registry) error {
+	if !hasKey {
+		return errors.Required("prefix", "query", rawData)
+	}
+	var raw string
+	if len(rawData) > 0 {
+		raw = rawData[len(rawData)-1]
+	}
+
+	// Required: true
+	// AllowEmptyValue: false
+	if err := validate.RequiredString("prefix", "query", raw); err != nil {
+		return err
+	}
+
+	o.Prefix = raw
+
+	return nil
+}

restapi/operations/user_api/download_object_responses.go

@@ -0,0 +1,132 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 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 user_api
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the swagger generate command
+
+import (
+	"io"
+	"net/http"
+
+	"github.com/go-openapi/runtime"
+
+	"github.com/minio/console/models"
+)
+
+// DownloadObjectOKCode is the HTTP code returned for type DownloadObjectOK
+const DownloadObjectOKCode int = 200
+
+/*DownloadObjectOK A successful response.
+
+swagger:response downloadObjectOK
+*/
+type DownloadObjectOK struct {
+
+	/*
+	  In: Body
+	*/
+	Payload io.ReadCloser `json:"body,omitempty"`
+}
+
+// NewDownloadObjectOK creates DownloadObjectOK with default headers values
+func NewDownloadObjectOK() *DownloadObjectOK {
+
+	return &DownloadObjectOK{}
+}
+
+// WithPayload adds the payload to the download object o k response
+func (o *DownloadObjectOK) WithPayload(payload io.ReadCloser) *DownloadObjectOK {
+	o.Payload = payload
+	return o
+}
+
+// SetPayload sets the payload to the download object o k response
+func (o *DownloadObjectOK) SetPayload(payload io.ReadCloser) {
+	o.Payload = payload
+}
+
+// WriteResponse to the client
+func (o *DownloadObjectOK) WriteResponse(rw http.ResponseWriter, producer runtime.Producer) {
+
+	rw.WriteHeader(200)
+	payload := o.Payload
+	if err := producer.Produce(rw, payload); err != nil {
+		panic(err) // let the recovery middleware deal with this
+	}
+}
+
+/*DownloadObjectDefault Generic error response.
+
+swagger:response downloadObjectDefault
+*/
+type DownloadObjectDefault struct {
+	_statusCode int
+
+	/*
+	  In: Body
+	*/
+	Payload *models.Error `json:"body,omitempty"`
+}
+
+// NewDownloadObjectDefault creates DownloadObjectDefault with default headers values
+func NewDownloadObjectDefault(code int) *DownloadObjectDefault {
+	if code <= 0 {
+		code = 500
+	}
+
+	return &DownloadObjectDefault{
+		_statusCode: code,
+	}
+}
+
+// WithStatusCode adds the status to the download object default response
+func (o *DownloadObjectDefault) WithStatusCode(code int) *DownloadObjectDefault {
+	o._statusCode = code
+	return o
+}
+
+// SetStatusCode sets the status to the download object default response
+func (o *DownloadObjectDefault) SetStatusCode(code int) {
+	o._statusCode = code
+}
+
+// WithPayload adds the payload to the download object default response
+func (o *DownloadObjectDefault) WithPayload(payload *models.Error) *DownloadObjectDefault {
+	o.Payload = payload
+	return o
+}
+
+// SetPayload sets the payload to the download object default response
+func (o *DownloadObjectDefault) SetPayload(payload *models.Error) {
+	o.Payload = payload
+}
+
+// WriteResponse to the client
+func (o *DownloadObjectDefault) WriteResponse(rw http.ResponseWriter, producer runtime.Producer) {
+
+	rw.WriteHeader(o._statusCode)
+	if o.Payload != nil {
+		payload := o.Payload
+		if err := producer.Produce(rw, payload); err != nil {
+			panic(err) // let the recovery middleware deal with this
+		}
+	}
+}

restapi/operations/user_api/download_object_urlbuilder.go

@@ -0,0 +1,127 @@
+// Code generated by go-swagger; DO NOT EDIT.
+
+// This file is part of MinIO Console Server
+// Copyright (c) 2020 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 user_api
+
+// This file was generated by the swagger tool.
+// Editing this file might prove futile when you re-run the generate command
+
+import (
+	"errors"
+	"net/url"
+	golangswaggerpaths "path"
+	"strings"
+)
+
+// DownloadObjectURL generates an URL for the download object operation
+type DownloadObjectURL struct {
+	BucketName string
+
+	Prefix string
+
+	_basePath string
+	// avoid unkeyed usage
+	_ struct{}
+}
+
+// WithBasePath sets the base path for this url builder, only required when it's different from the
+// base path specified in the swagger spec.
+// When the value of the base path is an empty string
+func (o *DownloadObjectURL) WithBasePath(bp string) *DownloadObjectURL {
+	o.SetBasePath(bp)
+	return o
+}
+
+// SetBasePath sets the base path for this url builder, only required when it's different from the
+// base path specified in the swagger spec.
+// When the value of the base path is an empty string
+func (o *DownloadObjectURL) SetBasePath(bp string) {
+	o._basePath = bp
+}
+
+// Build a url path and query string
+func (o *DownloadObjectURL) Build() (*url.URL, error) {
+	var _result url.URL
+
+	var _path = "/buckets/{bucket_name}/objects/download"
+
+	bucketName := o.BucketName
+	if bucketName != "" {
+		_path = strings.Replace(_path, "{bucket_name}", bucketName, -1)
+	} else {
+		return nil, errors.New("bucketName is required on DownloadObjectURL")
+	}
+
+	_basePath := o._basePath
+	if _basePath == "" {
+		_basePath = "/api/v1"
+	}
+	_result.Path = golangswaggerpaths.Join(_basePath, _path)
+
+	qs := make(url.Values)
+
+	prefixQ := o.Prefix
+	if prefixQ != "" {
+		qs.Set("prefix", prefixQ)
+	}
+
+	_result.RawQuery = qs.Encode()
+
+	return &_result, nil
+}
+
+// Must is a helper function to panic when the url builder returns an error
+func (o *DownloadObjectURL) Must(u *url.URL, err error) *url.URL {
+	if err != nil {
+		panic(err)
+	}
+	if u == nil {
+		panic("url can't be nil")
+	}
+	return u
+}
+
+// String returns the string representation of the path with query string
+func (o *DownloadObjectURL) String() string {
+	return o.Must(o.Build()).String()
+}
+
+// BuildFull builds a full url with scheme, host, path and query string
+func (o *DownloadObjectURL) BuildFull(scheme, host string) (*url.URL, error) {
+	if scheme == "" {
+		return nil, errors.New("scheme is required for a full url on DownloadObjectURL")
+	}
+	if host == "" {
+		return nil, errors.New("host is required for a full url on DownloadObjectURL")
+	}
+
+	base, err := o.Build()
+	if err != nil {
+		return nil, err
+	}
+
+	base.Scheme = scheme
+	base.Host = host
+	return base, nil
+}
+
+// StringFull returns the string representation of a complete url
+func (o *DownloadObjectURL) StringFull(scheme, host string) string {
+	return o.Must(o.BuildFull(scheme, host)).String()
+}

restapi/user_objects.go

@@ -19,12 +19,15 @@ package restapi
 import (
 	"context"
 	"fmt"
+	"io"
 	"log"
+	"net/http"
 	"path/filepath"
 	"regexp"
 	"strings"
 	"time"
 
+	"github.com/go-openapi/runtime"
 	"github.com/go-openapi/runtime/middleware"
 	"github.com/minio/console/models"
 	"github.com/minio/console/restapi/operations"
@@ -56,6 +59,22 @@ func registerObjectsHandlers(api *operations.ConsoleAPI) {
 		}
 		return user_api.NewDeleteObjectOK()
 	})
+	// download object
+	api.UserAPIDownloadObjectHandler = user_api.DownloadObjectHandlerFunc(func(params user_api.DownloadObjectParams, session *models.Principal) middleware.Responder {
+		resp, err := getDownloadObjectResponse(session, params)
+		if err != nil {
+			return user_api.NewDownloadObjectDefault(int(err.Code)).WithPayload(err)
+		}
+		return middleware.ResponderFunc(func(rw http.ResponseWriter, _ runtime.Producer) {
+			if _, err := io.Copy(rw, resp); err != nil {
+				log.Println(err)
+			} else {
+				if err := resp.Close(); err != nil {
+					log.Println(err)
+				}
+			}
+		})
+	})
 }
 
 // getListObjectsResponse returns a list of objects
@@ -149,6 +168,33 @@ func listBucketObjects(ctx context.Context, client MinioClient, bucketName strin
 	return objects, nil
 }
 
+func getDownloadObjectResponse(session *models.Principal, params user_api.DownloadObjectParams) (io.ReadCloser, *models.Error) {
+	ctx := context.Background()
+	s3Client, err := newS3BucketClient(session, params.BucketName, params.Prefix)
+	if err != nil {
+		return nil, prepareError(err)
+	}
+	// create a mc S3Client interface implementation
+	// defining the client to be used
+	mcClient := mcClient{client: s3Client}
+	object, err := downloadObject(ctx, mcClient)
+	if err != nil {
+		return nil, prepareError(err)
+	}
+	return object, nil
+}
+
+func downloadObject(ctx context.Context, client MCClient) (io.ReadCloser, error) {
+	// TODO: handle version
+	// TODO: handle encripted files
+	var reader io.ReadCloser
+	reader, pErr := client.get(ctx, mc.GetOptions{})
+	if pErr != nil {
+		return nil, pErr.Cause
+	}
+	return reader, nil
+}
+
 // getDeleteObjectResponse returns whether there was an error on deletion of object
 func getDeleteObjectResponse(session *models.Principal, params user_api.DeleteObjectParams) *models.Error {
 	ctx := context.Background()

restapi/user_objects_test.go

@@ -20,6 +20,7 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"io"
 	"reflect"
 	"testing"
 	"time"
@@ -36,6 +37,7 @@ var minioGetObjectRetentionMock func(ctx context.Context, bucketName, objectName
 
 var mcListMock func(ctx context.Context, opts mc.ListOptions) <-chan *mc.ClientContent
 var mcRemoveMock func(ctx context.Context, isIncomplete, isRemoveBucket, isBypass bool, contentCh <-chan *mc.ClientContent) <-chan *probe.Error
+var mcGetMock func(ctx context.Context, opts mc.GetOptions) (io.ReadCloser, *probe.Error)
 
 // mock functions for minioClientMock
 func (ac minioClientMock) listObjects(ctx context.Context, bucket string, opts minio.ListObjectsOptions) <-chan minio.ObjectInfo {
@@ -57,6 +59,10 @@ func (c s3ClientMock) remove(ctx context.Context, isIncomplete, isRemoveBucket,
 	return mcRemoveMock(ctx, isIncomplete, isRemoveBucket, isBypass, contentCh)
 }
 
+func (c s3ClientMock) get(ctx context.Context, opts mc.GetOptions) (io.ReadCloser, *probe.Error) {
+	return mcGetMock(ctx, opts)
+}
+
 func Test_listObjects(t *testing.T) {
 	ctx := context.Background()
 	t1 := time.Now()

swagger.yml

@@ -285,6 +285,33 @@ paths:
       tags:
         - UserAPI
 
+  /buckets/{bucket_name}/objects/download:
+    get:
+      summary: Download Object
+      operationId: Download Object
+      produces:
+        - application/octet-stream
+      parameters:
+        - name: bucket_name
+          in: path
+          required: true
+          type: string
+        - name: prefix
+          in: query
+          required: true
+          type: string
+      responses:
+        200:
+          description: A successful response.
+          schema:
+            type: file
+        default:
+          description: Generic error response.
+          schema:
+            $ref: "#/definitions/error"
+      tags:
+        - UserAPI
+
   /buckets/{name}/set-policy:
     put:
       summary: Bucket Set Policy