122 lines
3.3 KiB
JavaScript
122 lines
3.3 KiB
JavaScript
/**
|
|
* 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 <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* create a new event source
|
|
* @param string src
|
|
* @param object data to be send as GET
|
|
*/
|
|
OC.EventSource=function(src,data){
|
|
var dataStr='';
|
|
this.typelessListeners=[];
|
|
this.listeners={};
|
|
if(data){
|
|
for(name in data){
|
|
dataStr+=name+'='+encodeURIComponent(data[name])+'&';
|
|
}
|
|
}
|
|
dataStr+='requesttoken='+oc_requesttoken;
|
|
if(!this.useFallBack && typeof EventSource !='undefined'){
|
|
var joinChar = '&';
|
|
if(src.indexOf('?') == -1) {
|
|
joinChar = '?';
|
|
}
|
|
this.source=new EventSource(src+joinChar+dataStr);
|
|
this.source.onmessage=function(e){
|
|
for(var i=0;i<this.typelessListeners.length;i++){
|
|
this.typelessListeners[i](JSON.parse(e.data));
|
|
}
|
|
}.bind(this);
|
|
}else{
|
|
iframeId='oc_eventsource_iframe_'+OC.EventSource.iframeCount;
|
|
OC.EventSource.fallBackSources[OC.EventSource.iframeCount]=this;
|
|
this.iframe=$('<iframe/>');
|
|
this.iframe.attr('id',iframeId);
|
|
this.iframe.hide();
|
|
|
|
var joinChar = '&';
|
|
if(src.indexOf('?') == -1) {
|
|
joinChar = '?';
|
|
}
|
|
this.iframe.attr('src',src+joinChar+'fallback=true&fallback_id='+OC.EventSource.iframeCount+'&'+dataStr);
|
|
$('body').append(this.iframe);
|
|
this.useFallBack=true;
|
|
OC.EventSource.iframeCount++
|
|
}
|
|
//add close listener
|
|
this.listen('__internal__',function(data){
|
|
if(data=='close'){
|
|
this.close();
|
|
}
|
|
}.bind(this));
|
|
}
|
|
OC.EventSource.fallBackSources=[];
|
|
OC.EventSource.iframeCount=0;//number of fallback iframes
|
|
OC.EventSource.fallBackCallBack=function(id,type,data){
|
|
OC.EventSource.fallBackSources[id].fallBackCallBack(type,data);
|
|
}
|
|
OC.EventSource.prototype={
|
|
typelessListeners:[],
|
|
iframe:null,
|
|
listeners:{},//only for fallback
|
|
useFallBack:false,
|
|
fallBackCallBack:function(type,data){
|
|
if(type){
|
|
for(var i=0;i<this.listeners[type].length;i++){
|
|
this.listeners[type][i](data);
|
|
}
|
|
}else{
|
|
for(var i=0;i<this.typelessListeners.length;i++){
|
|
this.typelessListeners[i](data);
|
|
}
|
|
}
|
|
},
|
|
lastLength:0,//for fallback
|
|
listen:function(type,callback){
|
|
if(callback && callback.call){
|
|
|
|
if(type){
|
|
if(this.useFallBack){
|
|
if(!this.listeners[type]){
|
|
this.listeners[type]=[];
|
|
}
|
|
this.listeners[type].push(callback);
|
|
}else{
|
|
this.source.addEventListener(type,function(e){
|
|
callback(JSON.parse(e.data));
|
|
},false);
|
|
}
|
|
}else{
|
|
typelessListeners.push(callback);
|
|
}
|
|
}
|
|
},
|
|
close:function(){
|
|
this.source.close();
|
|
}
|
|
}
|