Add custom header with grafana user and a config switch for it

pkg/api/pluginproxy/ds_proxy.go

@@ -34,13 +34,14 @@ type DataSourceProxy struct {
 	proxyPath string
 	route     *plugins.AppPluginRoute
 	plugin    *plugins.DataSourcePlugin
+	cfg       *setting.Cfg
 }
 
 type httpClient interface {
 	Do(req *http.Request) (*http.Response, error)
 }
 
-func NewDataSourceProxy(ds *m.DataSource, plugin *plugins.DataSourcePlugin, ctx *m.ReqContext, proxyPath string) *DataSourceProxy {
+func NewDataSourceProxy(ds *m.DataSource, plugin *plugins.DataSourcePlugin, ctx *m.ReqContext, proxyPath string, cfg *setting.Cfg) *DataSourceProxy {
 	targetURL, _ := url.Parse(ds.Url)
 
 	return &DataSourceProxy{
@@ -49,6 +50,7 @@ func NewDataSourceProxy(ds *m.DataSource, plugin *plugins.DataSourcePlugin, ctx
 		ctx:       ctx,
 		proxyPath: proxyPath,
 		targetUrl: targetURL,
+		cfg:       cfg,
 	}
 }
 
@@ -170,6 +172,10 @@ func (proxy *DataSourceProxy) getDirector() func(req *http.Request) {
 			req.Header.Add("Authorization", dsAuth)
 		}
 
+		if proxy.cfg.SendUserHeader {
+			req.Header.Add("X-Grafana-User", proxy.ctx.SignedInUser.Login)
+		}
+
 		// clear cookie header, except for whitelisted cookies
 		var keptCookies []*http.Cookie
 		if proxy.ds.JsonData != nil {