snapshots: Move external snapshot creation to backend

pkg/api/dashboard_snapshot.go

 package api
 
 import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
 	"time"
 
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/bus"
+	"github.com/grafana/grafana/pkg/components/simplejson"
 	"github.com/grafana/grafana/pkg/metrics"
 	m "github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/services/guardian"
@@ -12,6 +17,11 @@ import (
 	"github.com/grafana/grafana/pkg/util"
 )
 
+var client = &http.Client{
+	Timeout:   time.Second * 5,
+	Transport: &http.Transport{Proxy: http.ProxyFromEnvironment},
+}
+
 func GetSharingOptions(c *m.ReqContext) {
 	c.JSON(200, util.DynMap{
 		"externalSnapshotURL":  setting.ExternalSnapshotUrl,
@@ -20,26 +30,82 @@ func GetSharingOptions(c *m.ReqContext) {
 	})
 }
 
+type CreateExternalSnapshotResponse struct {
+	Key       string `json:"key"`
+	DeleteKey string `json:"deleteKey"`
+	Url       string `json:"url"`
+	DeleteUrl string `json:"deleteUrl"`
+}
+
+func createExternalDashboardSnapshot(cmd m.CreateDashboardSnapshotCommand) (*CreateExternalSnapshotResponse, error) {
+	var createSnapshotResponse CreateExternalSnapshotResponse
+	message := map[string]interface{}{
+		"name":      cmd.Name,
+		"expires":   cmd.Expires,
+		"dashboard": cmd.Dashboard,
+	}
+
+	messageBytes, err := simplejson.NewFromAny(message).Encode()
+	if err != nil {
+		return nil, err
+	}
+
+	response, err := client.Post(setting.ExternalSnapshotUrl+"/api/snapshots", "application/json", bytes.NewBuffer(messageBytes))
+	if response != nil {
+		defer response.Body.Close()
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	if response.StatusCode != 200 {
+		return nil, fmt.Errorf("Create external snapshot response status code %d", response.StatusCode)
+	}
+
+	if err := json.NewDecoder(response.Body).Decode(&createSnapshotResponse); err != nil {
+		return nil, err
+	}
+
+	return &createSnapshotResponse, nil
+}
+
+// POST /api/snapshots
 func CreateDashboardSnapshot(c *m.ReqContext, cmd m.CreateDashboardSnapshotCommand) {
 	if cmd.Name == "" {
 		cmd.Name = "Unnamed snapshot"
 	}
 
+	var url string
+	cmd.ExternalUrl = ""
+	cmd.OrgId = c.OrgId
+	cmd.UserId = c.UserId
+
 	if cmd.External {
-		// external snapshot ref requires key and delete key
-		if cmd.Key == "" || cmd.DeleteKey == "" {
-			c.JsonApiErr(400, "Missing key and delete key for external snapshot", nil)
+		if !setting.ExternalEnabled {
+			c.JsonApiErr(403, "External dashboard creation is disabled", nil)
 			return
 		}
 
-		cmd.OrgId = -1
-		cmd.UserId = -1
+		response, err := createExternalDashboardSnapshot(cmd)
+		if err != nil {
+			c.JsonApiErr(500, "Failed to create external snaphost", err)
+			return
+		}
+
+		url = response.Url
+		cmd.Key = response.Key
+		cmd.DeleteKey = response.DeleteKey
+		cmd.ExternalUrl = response.Url
+		cmd.ExternalDeleteUrl = response.DeleteUrl
+		cmd.Dashboard = simplejson.New()
+
 		metrics.M_Api_Dashboard_Snapshot_External.Inc()
 	} else {
 		cmd.Key = util.GetRandomString(32)
 		cmd.DeleteKey = util.GetRandomString(32)
-		cmd.OrgId = c.OrgId
-		cmd.UserId = c.UserId
+		url = setting.ToAbsUrl("dashboard/snapshot/" + cmd.Key)
+
 		metrics.M_Api_Dashboard_Snapshot_Create.Inc()
 	}
 
@@ -51,7 +117,7 @@ func CreateDashboardSnapshot(c *m.ReqContext, cmd m.CreateDashboardSnapshotComma
 	c.JSON(200, util.DynMap{
 		"key":       cmd.Key,
 		"deleteKey": cmd.DeleteKey,
-		"url":       setting.ToAbsUrl("dashboard/snapshot/" + cmd.Key),
+		"url":       url,
 		"deleteUrl": setting.ToAbsUrl("api/snapshots-delete/" + cmd.DeleteKey),
 	})
 }

pkg/models/dashboard_snapshot.go

@@ -16,6 +16,7 @@ type DashboardSnapshot struct {
 	UserId            int64
 	External          bool
 	ExternalUrl       string
+	ExternalDeleteUrl string
 
 	Expires time.Time
 	Created time.Time
@@ -49,6 +50,9 @@ type CreateDashboardSnapshotCommand struct {
 
 	// these are passed when storing an external snapshot ref
 	External          bool   `json:"external"`
+	ExternalUrl       string `json:"-"`
+	ExternalDeleteUrl string `json:"-"`
+
 	Key       string `json:"key"`
 	DeleteKey string `json:"deleteKey"`
 

pkg/services/sqlstore/dashboard_snapshot.go

@@ -53,6 +53,8 @@ func CreateDashboardSnapshot(cmd *m.CreateDashboardSnapshotCommand) error {
 			OrgId:             cmd.OrgId,
 			UserId:            cmd.UserId,
 			External:          cmd.External,
+			ExternalUrl:       cmd.ExternalUrl,
+			ExternalDeleteUrl: cmd.ExternalDeleteUrl,
 			Dashboard:         cmd.Dashboard,
 			Expires:           expires,
 			Created:           time.Now(),

public/app/features/dashboard/share_snapshot_ctrl.ts

@@ -27,7 +27,6 @@ export class ShareSnapshotCtrl {
 
     $scope.init = () => {
       backendSrv.get('/api/snapshot/shared-options').then(options => {
-        $scope.externalUrl = options['externalSnapshotURL'];
         $scope.sharingButtonText = options['externalSnapshotName'];
         $scope.externalEnabled = options['externalEnabled'];
       });
@@ -61,30 +60,14 @@ export class ShareSnapshotCtrl {
         dashboard: dash,
         name: dash.title,
         expires: $scope.snapshot.expires,
+        external: external,
       };
 
-      const postUrl = external ? $scope.externalUrl + $scope.apiUrl : $scope.apiUrl;
-
-      backendSrv.post(postUrl, cmdData).then(
+      backendSrv.post($scope.apiUrl, cmdData).then(
         results => {
           $scope.loading = false;
-
-          if (external) {
           $scope.deleteUrl = results.deleteUrl;
           $scope.snapshotUrl = results.url;
-            $scope.saveExternalSnapshotRef(cmdData, results);
-          } else {
-            const url = $location.url();
-            let baseUrl = $location.absUrl();
-
-            if (url !== '/') {
-              baseUrl = baseUrl.replace(url, '') + '/';
-            }
-
-            $scope.snapshotUrl = baseUrl + 'dashboard/snapshot/' + results.key;
-            $scope.deleteUrl = baseUrl + 'api/snapshots-delete/' + results.deleteKey;
-          }
-
           $scope.step = 2;
         },
         () => {
@@ -161,14 +144,6 @@ export class ShareSnapshotCtrl {
         $scope.step = 3;
       });
     };
-
-    $scope.saveExternalSnapshotRef = (cmdData, results) => {
-      // save external in local instance as well
-      cmdData.external = true;
-      cmdData.key = results.key;
-      cmdData.deleteKey = results.deleteKey;
-      backendSrv.post('/api/snapshots/', cmdData);
-    };
   }
 }