60 lines
1.7 KiB
JavaScript
60 lines
1.7 KiB
JavaScript
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//>>built
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// wrapped by build app
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define("dojox/socket/Reconnect", ["dijit","dojo","dojox"], function(dijit,dojo,dojox){
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dojo.provide("dojox.socket.Reconnect");
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dojox.socket.Reconnect = function(socket, options){
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// summary:
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// Provides auto-reconnection to a websocket after it has been closed
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// socket:
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// Socket to add reconnection support to.
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// returns:
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// An object that implements the WebSocket API
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// example:
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// You can use the Reconnect module:
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// | dojo.require("dojox.socket");
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// | dojo.require("dojox.socket.Reconnect");
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// | var socket = dojox.socket({url:"/comet"});
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// | // add auto-reconnect support
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// | socket = dojox.socket.Reconnect(socket);
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options = options || {};
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var reconnectTime = options.reconnectTime || 10000;
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var connectHandle = dojo.connect(socket, "onclose", function(event){
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clearTimeout(checkForOpen);
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if(!event.wasClean){
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socket.disconnected(function(){
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dojox.socket.replace(socket, newSocket = socket.reconnect());
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});
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}
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});
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var checkForOpen, newSocket;
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if(!socket.disconnected){
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// add a default impl if it doesn't exist
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socket.disconnected = function(reconnect){
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setTimeout(function(){
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reconnect();
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checkForOpen = setTimeout(function(){
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//reset the backoff
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if(newSocket.readyState < 2){
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reconnectTime = options.reconnectTime || 10000;
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}
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}, 10000);
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}, reconnectTime);
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// backoff each time
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reconnectTime *= options.backoffRate || 2;
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};
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}
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if(!socket.reconnect){
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// add a default impl if it doesn't exist
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socket.reconnect = function(){
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return socket.args ?
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dojox.socket.LongPoll(socket.args) :
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dojox.socket.WebSocket({url: socket.URL || socket.url}); // different cases for different impls
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};
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}
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return socket;
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};
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});
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