Merge branch 'externalPlugin' of https://github.com/raintank/grafana into external-plugins

pkg/api/api.go

@@ -187,5 +187,7 @@ func Register(r *macaron.Macaron) {
 	// rendering
 	r.Get("/render/*", reqSignedIn, RenderToPng)
 
+	InitExternalPluginRoutes(r)
+
 	r.NotFound(NotFoundHandler)
 }

pkg/api/externalplugin.go

+package api
+
+import (
+	"encoding/json"
+	"github.com/Unknwon/macaron"
+	"github.com/grafana/grafana/pkg/log"
+	"github.com/grafana/grafana/pkg/middleware"
+	"github.com/grafana/grafana/pkg/plugins"
+	"github.com/grafana/grafana/pkg/util"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+)
+
+func InitExternalPluginRoutes(r *macaron.Macaron) {
+	/*
+		// Handle Auth and role requirements
+		if route.ReqSignedIn {
+			c.Invoke(middleware.Auth(&middleware.AuthOptions{ReqSignedIn: true}))
+		}
+		if route.ReqGrafanaAdmin {
+			c.Invoke(middleware.Auth(&middleware.AuthOptions{ReqSignedIn: true, ReqGrafanaAdmin: true}))
+		}
+		if route.ReqRole != nil {
+			if *route.ReqRole == m.ROLE_EDITOR {
+				c.Invoke(middleware.RoleAuth(m.ROLE_EDITOR, m.ROLE_ADMIN))
+			}
+			if *route.ReqRole == m.ROLE_ADMIN {
+				c.Invoke(middleware.RoleAuth(m.ROLE_ADMIN))
+			}
+		}
+	*/
+	for _, plugin := range plugins.ExternalPlugins {
+		log.Info("adding routes for external plugin")
+		for _, route := range plugin.Settings.Routes {
+			log.Info("adding route %s /plugins%s", route.Method, route.Path)
+			r.Route(util.JoinUrlFragments("/plugins/", route.Path), route.Method, ExternalPlugin(route.Url))
+		}
+	}
+}
+
+func ExternalPlugin(routeUrl string) macaron.Handler {
+	return func(c *middleware.Context) {
+		path := c.Params("*")
+
+		//Create a HTTP header with the context in it.
+		ctx, err := json.Marshal(c.SignedInUser)
+		if err != nil {
+			c.JsonApiErr(500, "failed to marshal context to json.", err)
+			return
+		}
+		targetUrl, _ := url.Parse(routeUrl)
+		proxy := NewExternalPluginProxy(string(ctx), path, targetUrl)
+		proxy.Transport = dataProxyTransport
+		proxy.ServeHTTP(c.RW(), c.Req.Request)
+	}
+}
+
+func NewExternalPluginProxy(ctx string, proxyPath string, targetUrl *url.URL) *httputil.ReverseProxy {
+	director := func(req *http.Request) {
+		req.URL.Scheme = targetUrl.Scheme
+		req.URL.Host = targetUrl.Host
+		req.Host = targetUrl.Host
+
+		req.URL.Path = util.JoinUrlFragments(targetUrl.Path, proxyPath)
+
+		// clear cookie headers
+		req.Header.Del("Cookie")
+		req.Header.Del("Set-Cookie")
+		req.Header.Add("Grafana-Context", ctx)
+	}
+
+	return &httputil.ReverseProxy{Director: director}
+}

pkg/api/index.go

@@ -3,6 +3,7 @@ package api
 import (
 	"github.com/grafana/grafana/pkg/api/dtos"
 	"github.com/grafana/grafana/pkg/middleware"
+	"github.com/grafana/grafana/pkg/plugins"
 	"github.com/grafana/grafana/pkg/setting"
 )
 
@@ -52,6 +53,25 @@ func setIndexViewData(c *middleware.Context) error {
 		c.Data["GoogleTagManagerId"] = setting.GoogleTagManagerId
 	}
 
+	externalPluginJs := make([]string, 0)
+	externalPluginCss := make([]string, 0)
+	externalPluginMenu := make([]*plugins.ExternalPluginMenuItem, 0)
+	for _, plugin := range plugins.ExternalPlugins {
+		for _, js := range plugin.Settings.Js {
+			externalPluginJs = append(externalPluginJs, js.Src)
+		}
+		for _, css := range plugin.Settings.Css {
+			externalPluginCss = append(externalPluginCss, css.Href)
+		}
+		for _, item := range plugin.Settings.MenuItems {
+			externalPluginMenu = append(externalPluginMenu, item)
+		}
+
+	}
+	c.Data["ExternalPluginJs"] = externalPluginJs
+	c.Data["ExternalPluginCss"] = externalPluginCss
+	c.Data["ExternalPluginMenu"] = externalPluginMenu
+
 	return nil
 }
 

pkg/plugins/plugins.go

@@ -8,6 +8,7 @@ import (
 	"path/filepath"
 
 	"github.com/grafana/grafana/pkg/log"
+	"github.com/grafana/grafana/pkg/models"
 	"github.com/grafana/grafana/pkg/setting"
 )
 
@@ -16,8 +17,44 @@ type PluginMeta struct {
 	Name string `json:"name"`
 }
 
+type ExternalPluginRoute struct {
+	Path            string          `json:"path"`
+	Method          string          `json:"method"`
+	ReqSignedIn     bool            `json:"req_signed_in"`
+	ReqGrafanaAdmin bool            `json:"req_grafana_admin"`
+	ReqRole         models.RoleType `json:"req_role"`
+	Url             string          `json:"url"`
+}
+
+type ExternalPluginJs struct {
+	Src string `json:"src"`
+}
+
+type ExternalPluginMenuItem struct {
+	Text string `json:"text"`
+	Icon string `json:"icon"`
+	Href string `json:"href"`
+}
+
+type ExternalPluginCss struct {
+	Href string `json:"href"`
+}
+
+type ExternalPluginSettings struct {
+	Routes    []*ExternalPluginRoute    `json:"routes"`
+	Js        []*ExternalPluginJs       `json:"js"`
+	Css       []*ExternalPluginCss      `json:"css"`
+	MenuItems []*ExternalPluginMenuItem `json:"menu_items"`
+}
+
+type ExternalPlugin struct {
+	PluginType string                 `json:"pluginType"`
+	Settings   ExternalPluginSettings `json:"settings"`
+}
+
 var (
-	DataSources map[string]interface{}
+	DataSources     map[string]interface{}
+	ExternalPlugins []ExternalPlugin
 )
 
 type PluginScanner struct {
@@ -31,6 +68,7 @@ func Init() {
 
 func scan(pluginDir string) error {
 	DataSources = make(map[string]interface{})
+	ExternalPlugins = make([]ExternalPlugin, 0)
 
 	scanner := &PluginScanner{
 		pluginPath: pluginDir,
@@ -93,6 +131,14 @@ func (scanner *PluginScanner) loadPluginJson(path string) error {
 		}
 		DataSources[datasourceType.(string)] = pluginJson
 	}
+	if pluginType == "externalPlugin" {
+		p := ExternalPlugin{}
+		reader.Seek(0, 0)
+		if err := jsonParser.Decode(&p); err != nil {
+			return err
+		}
+		ExternalPlugins = append(ExternalPlugins, p)
+	}
 
 	return nil
 }

public/app/app.js

@@ -35,6 +35,8 @@ function (angular, $, _, appLevelRequire) {
     } else {
       _.extend(module, register_fns);
     }
+    // push it into the apps dependencies
+    apps_deps.push(module.name);
     return module;
   };
 
@@ -64,8 +66,6 @@ function (angular, $, _, appLevelRequire) {
     var module_name = 'grafana.'+type;
     // create the module
     app.useModule(angular.module(module_name, []));
-    // push it into the apps dependencies
-    apps_deps.push(module_name);
   });
 
   var preBootRequires = [

public/app/core/controllers/sidemenu_ctrl.js

@@ -28,6 +28,18 @@ function (angular, _, $, coreModule, config) {
           href: $scope.getUrl("/datasources"),
         });
       }
+
+      if (_.isArray(window.externalPlugins.MainLinks)) {
+        _.forEach(window.externalPlugins.MainLinks, function(item) {
+          if (!item.adminOnly || contextSrv.hasRole('Admin')) {
+            $scope.mainLinks.push({
+              text: item.text,
+              icon: item.icon,
+              href: $scope.getUrl(item.href)
+            });
+          }
+        });
+      }
     };
 
     $scope.loadOrgs = function() {

public/app/core/routes/all.js

@@ -10,7 +10,7 @@ define([
     $locationProvider.html5Mode(true);
 
     var loadOrgBundle = new BundleLoader.BundleLoader('app/features/org/all');
-
+    console.log("adding grafana routes");
     $routeProvider
       .when('/', {
         templateUrl: 'app/partials/dashboard.html',

public/app/plugins/externalPlugins/example/README.TXT

+Example app is available at https://github.com/raintank/grafana-plugin-example
+
+To use, download the example app from github and run it (requires python Flask). Then rename the "_plugin.json" file in this director to "plugin.json" and restart Grafana.

public/app/plugins/externalPlugins/example/_plugin.json

+{
+  "pluginType": "externalPlugin",
+  "settings": {
+    "routes": [
+      {
+        "path": "/example/static/*",
+        "method": "*",
+        "req_signed_in": false,
+        "req_grafana_admin": false,
+        "req_role": "Admin",
+        "url": "http://localhost:5000/static"
+      },
+      {
+        "path": "/example/api/*",
+        "method": "*",
+        "req_signed_in": true,
+        "req_grafana_admin": false,
+        "req_role": "Admin",
+        "url": "http://localhost:5000/api"
+      }
+    ],
+    "css": [
+      {
+        "href": "/example/static/css/example.css"
+      }
+    ],
+    "js": [
+      {
+        "src": "/example/static/js/app.js"
+      }
+    ],
+    "menu_items": [
+      {
+        "text": "Example Plugin",
+        "icon": "fa fa-fw fa-smile-o",
+        "href": "/example/servers",
+        "adminOnly": false,
+      }
+    ]
+  }
+}

public/views/index.html

@@ -13,6 +13,9 @@
 		[[else]]
 		  <link rel="stylesheet" href="[[.AppSubUrl]]/css/grafana.dark.min.css">
 		[[end]]
+		[[ range $css := .ExternalPluginCss ]]
+		<link rel="stylesheet" href="[[$.AppSubUrl]]/plugins[[ $css ]]">
+		[[ end ]]
 
     <link rel="icon" type="image/png" href="[[.AppSubUrl]]/img/fav32.png">
 		<base href="[[.AppSubUrl]]/" />
@@ -52,11 +55,17 @@
 			settings: [[.Settings]],
 		};
 
+		window.externalPlugins =  {
+			MainLinks: [[.ExternalPluginMenu]]
+		};
+
     require(['app/app'], function (app) {
-	    app.boot();
+    	app.boot();
     })
 	</script>
-
+	[[ range $js := .ExternalPluginJs]]
+	<script src="[[$.AppSubUrl]]/plugins[[ $js ]]"></script>
+	[[ end ]]
 	[[if .GoogleAnalyticsId]]
 		<script>
 		(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){