diff --git a/core/js/eventsource.js b/core/js/eventsource.js
new file mode 100644
index 0000000000..422f97657b
--- /dev/null
+++ b/core/js/eventsource.js
@@ -0,0 +1,94 @@
+/**
+ * ownCloud
+ *
+ * @author Robin Appelman
+ * @copyright 2012 Robin Appelman icewind1991@gmail.com
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library 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 library. If not, see .
+ *
+ */
+
+/**
+ * wrapper for server side events (http://en.wikipedia.org/wiki/Server-sent_events)
+ * includes a fallback for older browsers and IE
+ *
+ * use server side events with causion, to many open requests can hang the server
+ */
+
+OC.EventSource=function(src){
+ if(!this.useFallBack && typeof EventSource !='undefined'){
+ this.source=new EventSource(src);
+ this.source.onmessage=function(e){
+ for(var i=0;i');
+ this.iframe.attr('id',iframeId);
+ this.iframe.hide();
+ this.iframe.attr('src',src+'?fallback=true&fallback_id='+OC.EventSource.iframeCount);
+ $('body').append(this.iframe);
+ this.useFallBack=true;
+ OC.EventSource.iframeCount++
+
+ }
+}
+OC.EventSource.fallBackSources=[];
+OC.EventSource.iframeCount=0;//number of fallback iframes
+OC.EventSource.fallBackCallBack=function(id,type,data){
+ OC.EventSource.fallBackSources[id].fallBackCallBack(type,JSON.parse(data));
+}
+OC.EventSource.prototype={
+ typelessListeners:[],
+ iframe:null,
+ listeners:{},//only for fallback
+ useFallBack:false,
+ fallBackCallBack:function(type,data){
+ if(type){
+ for(var i=0;i.
+*
+*/
+
+/**
+ * wrapper for server side events (http://en.wikipedia.org/wiki/Server-sent_events)
+ * includes a fallback for older browsers and IE
+ *
+ * use server side events with causion, to many open requests can hang the server
+ */
+class OC_EventSource{
+ private $fallback;
+ private $fallBackId=0;
+
+ public function __construct(){
+ ob_end_clean();
+ header('Cache-Control: no-cache');
+ $this->fallback=isset($_GET['fallback']) and $_GET['fallback']=='true';
+ if($this->fallback){
+ $fallBackId=$_GET['fallback_id'];
+ header("Content-Type: text/html");
+ echo str_repeat(''.PHP_EOL,10); //dummy data to keep IE happy
+ }else{
+ header("Content-Type: text/event-stream");
+ }
+ flush();
+
+ }
+
+ /**
+ * send a message to the client
+ * @param string type
+ * @param object data
+ *
+ * if only one paramater is given, a typeless message will be send with that paramater as data
+ */
+ public function send($type,$data=null){
+ if(is_null($data)){
+ $data=$type;
+ $type=null;
+ }
+ if($this->fallback){
+ $response=''.PHP_EOL;
+ echo $response;
+ }else{
+ if($type){
+ echo 'event: '.$type.PHP_EOL;
+ }
+ echo 'data: '.json_encode($data).PHP_EOL;
+ }
+ echo PHP_EOL;
+ flush();
+ }
+}
\ No newline at end of file