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// Copyright: Hiroshi Ichikawa <http://gimite.net/en/>
// License: New BSD License
// Reference: http://dev.w3.org/html5/websockets/
// Reference: http://tools.ietf.org/html/draft-hixie-thewebsocketprotocol
(function() {
if (window.WebSocket) return;
var console = window.console;
if (!console) console = {log: function(){ }, error: function(){ }};
function hasFlash() {
if ('navigator' in window && 'plugins' in navigator && navigator.plugins['Shockwave Flash']) {
return !!navigator.plugins['Shockwave Flash'].description;
}
if ('ActiveXObject' in window) {
try {
return !!new ActiveXObject('ShockwaveFlash.ShockwaveFlash').GetVariable('$version');
} catch (e) {}
}
return false;
}
if (!hasFlash()) {
console.error("Flash Player is not installed.");
return;
}
console.log(location.protocol);
WebSocket = function(url, protocol, proxyHost, proxyPort, headers) {
var self = this;
self.readyState = WebSocket.CONNECTING;
self.bufferedAmount = 0;
// Uses setTimeout() to make sure __createFlash() runs after the caller sets ws.onopen etc.
// Otherwise, when onopen fires immediately, onopen is called before it is set.
setTimeout(function() {
WebSocket.__addTask(function() {
self.__createFlash(url, protocol, proxyHost, proxyPort, headers);
});
}, 1);
}
WebSocket.prototype.__createFlash = function(url, protocol, proxyHost, proxyPort, headers) {
var self = this;
self.__flash =
WebSocket.__flash.create(url, protocol, proxyHost || null, proxyPort || 0, headers || null);
self.__flash.addEventListener("open", function(fe) {
try {
self.readyState = self.__flash.getReadyState();
if (self.__timer) clearInterval(self.__timer);
if (window.opera) {
// Workaround for weird behavior of Opera which sometimes drops events.
self.__timer = setInterval(function () {
self.__handleMessages();
}, 500);
}
if (self.onopen) self.onopen();
} catch (e) {
console.error(e.toString());
}
});
self.__flash.addEventListener("close", function(fe) {
try {
self.readyState = self.__flash.getReadyState();
if (self.__timer) clearInterval(self.__timer);
if (self.onclose) self.onclose();
} catch (e) {
console.error(e.toString());
}
});
self.__flash.addEventListener("message", function() {
try {
self.__handleMessages();
} catch (e) {
console.error(e.toString());
}
});
self.__flash.addEventListener("error", function(fe) {
try {
if (self.__timer) clearInterval(self.__timer);
if (self.onerror) self.onerror();
} catch (e) {
console.error(e.toString());
}
});
self.__flash.addEventListener("stateChange", function(fe) {
try {
self.readyState = self.__flash.getReadyState();
self.bufferedAmount = fe.getBufferedAmount();
} catch (e) {
console.error(e.toString());
}
});
//console.log("[WebSocket] Flash object is ready");
};
WebSocket.prototype.send = function(data) {
if (this.__flash) {
this.readyState = this.__flash.getReadyState();
}
if (!this.__flash || this.readyState == WebSocket.CONNECTING) {
throw "INVALID_STATE_ERR: Web Socket connection has not been established";
}
var result = this.__flash.send(encodeURIComponent(data));
if (result < 0) { // success
return true;
} else {
this.bufferedAmount = result;
return false;
}
};
WebSocket.prototype.close = function() {
if (!this.__flash) return;
this.readyState = this.__flash.getReadyState();
if (this.readyState != WebSocket.OPEN) return;
this.__flash.close();
// Sets/calls them manually here because Flash WebSocketConnection.close cannot fire events
// which causes weird error:
// > You are trying to call recursively into the Flash Player which is not allowed.
this.readyState = WebSocket.CLOSED;
if (this.__timer) clearInterval(this.__timer);
if (this.onclose) this.onclose();
};
/**
* Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
*
* @param {string} type
* @param {function} listener
* @param {boolean} useCapture !NB Not implemented yet
* @return void
*/
WebSocket.prototype.addEventListener = function(type, listener, useCapture) {
if (!('__events' in this)) {
this.__events = {};
}
if (!(type in this.__events)) {
this.__events[type] = [];
if ('function' == typeof this['on' + type]) {
this.__events[type].defaultHandler = this['on' + type];
this['on' + type] = this.__createEventHandler(this, type);
}
}
this.__events[type].push(listener);
};
/**
* Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
*
* @param {string} type
* @param {function} listener
* @param {boolean} useCapture NB! Not implemented yet
* @return void
*/
WebSocket.prototype.removeEventListener = function(type, listener, useCapture) {
if (!('__events' in this)) {
this.__events = {};
}
if (!(type in this.__events)) return;
for (var i = this.__events.length; i > -1; --i) {
if (listener === this.__events[type][i]) {
this.__events[type].splice(i, 1);
break;
}
}
};
/**
* Implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-registration">DOM 2 EventTarget Interface</a>}
*
* @param {WebSocketEvent} event
* @return void
*/
WebSocket.prototype.dispatchEvent = function(event) {
if (!('__events' in this)) throw 'UNSPECIFIED_EVENT_TYPE_ERR';
if (!(event.type in this.__events)) throw 'UNSPECIFIED_EVENT_TYPE_ERR';
for (var i = 0, l = this.__events[event.type].length; i < l; ++ i) {
this.__events[event.type][i](event);
if (event.cancelBubble) break;
}
if (false !== event.returnValue &&
'function' == typeof this.__events[event.type].defaultHandler)
{
this.__events[event.type].defaultHandler(event);
}
};
WebSocket.prototype.__handleMessages = function() {
// Gets data using readSocketData() instead of getting it from event object
// of Flash event. This is to make sure to keep message order.
// It seems sometimes Flash events don't arrive in the same order as they are sent.
var arr = this.__flash.readSocketData();
for (var i = 0; i < arr.length; i++) {
var data = decodeURIComponent(arr[i]);
try {
if (this.onmessage) {
var e;
if (window.MessageEvent) {
e = document.createEvent("MessageEvent");
e.initMessageEvent("message", false, false, data, null, null, window, null);
} else { // IE
e = {data: data};
}
this.onmessage(e);
}
} catch (e) {
console.error(e.toString());
}
}
};
/**
* @param {object} object
* @param {string} type
*/
WebSocket.prototype.__createEventHandler = function(object, type) {
return function(data) {
var event = new WebSocketEvent();
event.initEvent(type, true, true);
event.target = event.currentTarget = object;
for (var key in data) {
event[key] = data[key];
}
object.dispatchEvent(event, arguments);
};
}
/**
* Basic implementation of {@link <a href="http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-interface">DOM 2 EventInterface</a>}
*
* @class
* @constructor
*/
function WebSocketEvent(){}
/**
*
* @type boolean
*/
WebSocketEvent.prototype.cancelable = true;
/**
*
* @type boolean
*/
WebSocketEvent.prototype.cancelBubble = false;
/**
*
* @return void
*/
WebSocketEvent.prototype.preventDefault = function() {
if (this.cancelable) {
this.returnValue = false;
}
};
/**
*
* @return void
*/
WebSocketEvent.prototype.stopPropagation = function() {
this.cancelBubble = true;
};
/**
*
* @param {string} eventTypeArg
* @param {boolean} canBubbleArg
* @param {boolean} cancelableArg
* @return void
*/
WebSocketEvent.prototype.initEvent = function(eventTypeArg, canBubbleArg, cancelableArg) {
this.type = eventTypeArg;
this.cancelable = cancelableArg;
this.timeStamp = new Date();
};
WebSocket.CONNECTING = 0;
WebSocket.OPEN = 1;
WebSocket.CLOSING = 2;
WebSocket.CLOSED = 3;
WebSocket.__tasks = [];
WebSocket.__initialize = function() {
if (WebSocket.__swfLocation) {
// For backword compatibility.
window.WEB_SOCKET_SWF_LOCATION = WebSocket.__swfLocation;
}
if (!window.WEB_SOCKET_SWF_LOCATION) {
console.error("[WebSocket] set WEB_SOCKET_SWF_LOCATION to location of WebSocketMain.swf");
return;
}
var container = document.createElement("div");
container.id = "webSocketContainer";
// Puts the Flash out of the window. Note that we cannot use display: none or visibility: hidden
// here because it prevents Flash from loading at least in IE.
container.style.position = "absolute";
container.style.left = "-100px";
container.style.top = "-100px";
var holder = document.createElement("div");
holder.id = "webSocketFlash";
container.appendChild(holder);
document.body.appendChild(container);
swfobject.embedSWF(
WEB_SOCKET_SWF_LOCATION, "webSocketFlash", "8", "8", "9.0.0",
null, {bridgeName: "webSocket"}, null, null,
function(e) {
if (!e.success) console.error("[WebSocket] swfobject.embedSWF failed");
}
);
FABridge.addInitializationCallback("webSocket", function() {
try {
//console.log("[WebSocket] FABridge initializad");
WebSocket.__flash = FABridge.webSocket.root();
WebSocket.__flash.setCallerUrl(location.href);
WebSocket.__flash.setDebug(!!window.WEB_SOCKET_DEBUG);
for (var i = 0; i < WebSocket.__tasks.length; ++i) {
WebSocket.__tasks[i]();
}
WebSocket.__tasks = [];
} catch (e) {
console.error("[WebSocket] " + e.toString());
}
});
};
WebSocket.__addTask = function(task) {
if (WebSocket.__flash) {
task();
} else {
WebSocket.__tasks.push(task);
}
}
// called from Flash
window.webSocketLog = function(message) {
console.log(decodeURIComponent(message));
};
// called from Flash
window.webSocketError = function(message) {
console.error(decodeURIComponent(message));
};
if (!window.WEB_SOCKET_DISABLE_AUTO_INITIALIZATION) {
if (window.addEventListener) {
window.addEventListener("load", WebSocket.__initialize, false);
} else {
window.attachEvent("onload", WebSocket.__initialize);
}
}
})();
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