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sockjs.js
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sockjs.js
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/* SockJS client, version 0.3.4, http://sockjs.org, MIT License
Copyright (c) 2011-2012 VMware, Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
if (typeof goog === 'object' && goog.provide) {
goog.provide('SockJS');
}
// [*] Including lib/index.js
// Public object
/**
* @constructor
*/
SockJS = (function(){
var _document = document;
var _window = window;
var utils = {};
// [*] Including lib/reventtarget.js
/*
* ***** BEGIN LICENSE BLOCK *****
* Copyright (c) 2011-2012 VMware, Inc.
*
* For the license see COPYING.
* ***** END LICENSE BLOCK *****
*/
/* Simplified implementation of DOM2 EventTarget.
* http://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-EventTarget
*/
var REventTarget = function() {};
REventTarget.prototype.addEventListener = function (eventType, listener) {
if(!this._listeners) {
this._listeners = {};
}
if(!(eventType in this._listeners)) {
this._listeners[eventType] = [];
}
var arr = this._listeners[eventType];
if(utils.arrIndexOf(arr, listener) === -1) {
arr.push(listener);
}
return;
};
REventTarget.prototype.removeEventListener = function (eventType, listener) {
if(!(this._listeners && (eventType in this._listeners))) {
return;
}
var arr = this._listeners[eventType];
var idx = utils.arrIndexOf(arr, listener);
if (idx !== -1) {
if(arr.length > 1) {
this._listeners[eventType] = arr.slice(0, idx).concat( arr.slice(idx+1) );
} else {
delete this._listeners[eventType];
}
return;
}
return;
};
REventTarget.prototype.dispatchEvent = function (event) {
var t = event.type;
var args = Array.prototype.slice.call(arguments, 0);
if (this['on'+t]) {
this['on'+t].apply(this, args);
}
if (this._listeners && t in this._listeners) {
for(var i=0; i < this._listeners[t].length; i++) {
this._listeners[t][i].apply(this, args);
}
}
};
// [*] End of lib/reventtarget.js
// [*] Including lib/simpleevent.js
/*
* ***** BEGIN LICENSE BLOCK *****
* Copyright (c) 2011-2012 VMware, Inc.
*
* For the license see COPYING.
* ***** END LICENSE BLOCK *****
*/
var SimpleEvent = function(type, obj) {
this.type = type;
if (typeof obj !== 'undefined') {
for(var k in obj) {
if (!obj.hasOwnProperty(k)) continue;
this[k] = obj[k];
}
}
};
SimpleEvent.prototype.toString = function() {
var r = [];
for(var k in this) {
if (!this.hasOwnProperty(k)) continue;
var v = this[k];
if (typeof v === 'function') v = '[function]';
r.push(k + '=' + v);
}
return 'SimpleEvent(' + r.join(', ') + ')';
};
// [*] End of lib/simpleevent.js
// [*] Including lib/eventemitter.js
/*
* ***** BEGIN LICENSE BLOCK *****
* Copyright (c) 2011-2012 VMware, Inc.
*
* For the license see COPYING.
* ***** END LICENSE BLOCK *****
*/
var EventEmitter = function(events) {
var that = this;
that._events = events || [];
that._listeners = {};
};
EventEmitter.prototype.emit = function(type) {
var that = this;
that._verifyType(type);
if (that._nuked) return;
var args = Array.prototype.slice.call(arguments, 1);
if (that['on'+type]) {
that['on'+type].apply(that, args);
}
if (type in that._listeners) {
for(var i = 0; i < that._listeners[type].length; i++) {
that._listeners[type][i].apply(that, args);
}
}
};
EventEmitter.prototype.on = function(type, callback) {
var that = this;
that._verifyType(type);
if (that._nuked) return;
if (!(type in that._listeners)) {
that._listeners[type] = [];
}
that._listeners[type].push(callback);
};
EventEmitter.prototype._verifyType = function(type) {
var that = this;
if (utils.arrIndexOf(that._events, type) === -1) {
utils.log('Event ' + JSON.stringify(type) +
' not listed ' + JSON.stringify(that._events) +
' in ' + that);
}
};
EventEmitter.prototype.nuke = function() {
var that = this;
that._nuked = true;
for(var i=0; i<that._events.length; i++) {
delete that[that._events[i]];
}
that._listeners = {};
};
// [*] End of lib/eventemitter.js
// [*] Including lib/utils.js
/*
* ***** BEGIN LICENSE BLOCK *****
* Copyright (c) 2011-2012 VMware, Inc.
*
* For the license see COPYING.
* ***** END LICENSE BLOCK *****
*/
var random_string_chars = 'abcdefghijklmnopqrstuvwxyz0123456789_';
utils.random_string = function(length, max) {
max = max || random_string_chars.length;
var i, ret = [];
for(i=0; i < length; i++) {
ret.push( random_string_chars.substr(Math.floor(Math.random() * max),1) );
}
return ret.join('');
};
utils.random_number = function(max) {
return Math.floor(Math.random() * max);
};
utils.random_number_string = function(max) {
var t = (''+(max - 1)).length;
var p = Array(t+1).join('0');
return (p + utils.random_number(max)).slice(-t);
};
// Assuming that url looks like: http://asdasd:111/asd
utils.getOrigin = function(url) {
url += '/';
var parts = url.split('/').slice(0, 3);
return parts.join('/');
};
utils.isSameOriginUrl = function(url_a, url_b) {
// location.origin would do, but it's not always available.
if (!url_b) url_b = _window.location.href;
return (url_a.split('/').slice(0,3).join('/')
===
url_b.split('/').slice(0,3).join('/'));
};
utils.getParentDomain = function(url) {
// ipv4 ip address
if (/^[0-9.]*$/.test(url)) return url;
// ipv6 ip address
if (/^\[/.test(url)) return url;
// no dots
if (!(/[.]/.test(url))) return url;
var parts = url.split('.').slice(1);
return parts.join('.');
};
utils.objectExtend = function(dst, src) {
for(var k in src) {
if (src.hasOwnProperty(k)) {
dst[k] = src[k];
}
}
return dst;
};
var WPrefix = '_jp';
utils.polluteGlobalNamespace = function() {
if (!(WPrefix in _window)) {
_window[WPrefix] = {};
}
};
utils.closeFrame = function (code, reason) {
return 'c'+JSON.stringify([code, reason]);
};
utils.userSetCode = function (code) {
return code === 1000 || (code >= 3000 && code <= 4999);
};
// See: http://www.erg.abdn.ac.uk/~gerrit/dccp/notes/ccid2/rto_estimator/
// and RFC 2988.
utils.countRTO = function (rtt) {
var rto;
if (rtt > 100) {
rto = 3 * rtt; // rto > 300msec
} else {
rto = rtt + 200; // 200msec < rto <= 300msec
}
return rto;
}
utils.log = function() {
if (_window.console && console.log && console.log.apply) {
console.log.apply(console, arguments);
}
};
utils.bind = function(fun, that) {
if (fun.bind) {
return fun.bind(that);
} else {
return function() {
return fun.apply(that, arguments);
};
}
};
utils.flatUrl = function(url) {
return url.indexOf('?') === -1 && url.indexOf('#') === -1;
};
utils.amendUrl = function(url) {
var dl = _document.location;
if (!url) {
throw new Error('Wrong url for SockJS');
}
if (!utils.flatUrl(url)) {
throw new Error('Only basic urls are supported in SockJS');
}
// '//abc' --> 'http://abc'
if (url.indexOf('//') === 0) {
url = dl.protocol + url;
}
// '/abc' --> 'http://localhost:80/abc'
if (url.indexOf('/') === 0) {
url = dl.protocol + '//' + dl.host + url;
}
// strip trailing slashes
url = url.replace(/[/]+$/,'');
return url;
};
// IE doesn't support [].indexOf.
utils.arrIndexOf = function(arr, obj){
for(var i=0; i < arr.length; i++){
if(arr[i] === obj){
return i;
}
}
return -1;
};
utils.arrSkip = function(arr, obj) {
var idx = utils.arrIndexOf(arr, obj);
if (idx === -1) {
return arr.slice();
} else {
var dst = arr.slice(0, idx);
return dst.concat(arr.slice(idx+1));
}
};
// Via: https://gist.github.com/1133122/2121c601c5549155483f50be3da5305e83b8c5df
utils.isArray = Array.isArray || function(value) {
return {}.toString.call(value).indexOf('Array') >= 0
};
utils.delay = function(t, fun) {
if(typeof t === 'function') {
fun = t;
t = 0;
}
return setTimeout(fun, t);
};
// Chars worth escaping, as defined by Douglas Crockford:
// https://github.com/douglascrockford/JSON-js/blob/47a9882cddeb1e8529e07af9736218075372b8ac/json2.js#L196
var json_escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
json_lookup = {
"\u0000":"\\u0000","\u0001":"\\u0001","\u0002":"\\u0002","\u0003":"\\u0003",
"\u0004":"\\u0004","\u0005":"\\u0005","\u0006":"\\u0006","\u0007":"\\u0007",
"\b":"\\b","\t":"\\t","\n":"\\n","\u000b":"\\u000b","\f":"\\f","\r":"\\r",
"\u000e":"\\u000e","\u000f":"\\u000f","\u0010":"\\u0010","\u0011":"\\u0011",
"\u0012":"\\u0012","\u0013":"\\u0013","\u0014":"\\u0014","\u0015":"\\u0015",
"\u0016":"\\u0016","\u0017":"\\u0017","\u0018":"\\u0018","\u0019":"\\u0019",
"\u001a":"\\u001a","\u001b":"\\u001b","\u001c":"\\u001c","\u001d":"\\u001d",
"\u001e":"\\u001e","\u001f":"\\u001f","\"":"\\\"","\\":"\\\\",
"\u007f":"\\u007f","\u0080":"\\u0080","\u0081":"\\u0081","\u0082":"\\u0082",
"\u0083":"\\u0083","\u0084":"\\u0084","\u0085":"\\u0085","\u0086":"\\u0086",
"\u0087":"\\u0087","\u0088":"\\u0088","\u0089":"\\u0089","\u008a":"\\u008a",
"\u008b":"\\u008b","\u008c":"\\u008c","\u008d":"\\u008d","\u008e":"\\u008e",
"\u008f":"\\u008f","\u0090":"\\u0090","\u0091":"\\u0091","\u0092":"\\u0092",
"\u0093":"\\u0093","\u0094":"\\u0094","\u0095":"\\u0095","\u0096":"\\u0096",
"\u0097":"\\u0097","\u0098":"\\u0098","\u0099":"\\u0099","\u009a":"\\u009a",
"\u009b":"\\u009b","\u009c":"\\u009c","\u009d":"\\u009d","\u009e":"\\u009e",
"\u009f":"\\u009f","\u00ad":"\\u00ad","\u0600":"\\u0600","\u0601":"\\u0601",
"\u0602":"\\u0602","\u0603":"\\u0603","\u0604":"\\u0604","\u070f":"\\u070f",
"\u17b4":"\\u17b4","\u17b5":"\\u17b5","\u200c":"\\u200c","\u200d":"\\u200d",
"\u200e":"\\u200e","\u200f":"\\u200f","\u2028":"\\u2028","\u2029":"\\u2029",
"\u202a":"\\u202a","\u202b":"\\u202b","\u202c":"\\u202c","\u202d":"\\u202d",
"\u202e":"\\u202e","\u202f":"\\u202f","\u2060":"\\u2060","\u2061":"\\u2061",
"\u2062":"\\u2062","\u2063":"\\u2063","\u2064":"\\u2064","\u2065":"\\u2065",
"\u2066":"\\u2066","\u2067":"\\u2067","\u2068":"\\u2068","\u2069":"\\u2069",
"\u206a":"\\u206a","\u206b":"\\u206b","\u206c":"\\u206c","\u206d":"\\u206d",
"\u206e":"\\u206e","\u206f":"\\u206f","\ufeff":"\\ufeff","\ufff0":"\\ufff0",
"\ufff1":"\\ufff1","\ufff2":"\\ufff2","\ufff3":"\\ufff3","\ufff4":"\\ufff4",
"\ufff5":"\\ufff5","\ufff6":"\\ufff6","\ufff7":"\\ufff7","\ufff8":"\\ufff8",
"\ufff9":"\\ufff9","\ufffa":"\\ufffa","\ufffb":"\\ufffb","\ufffc":"\\ufffc",
"\ufffd":"\\ufffd","\ufffe":"\\ufffe","\uffff":"\\uffff"};
// Some extra characters that Chrome gets wrong, and substitutes with
// something else on the wire.
var extra_escapable = /[\x00-\x1f\ud800-\udfff\ufffe\uffff\u0300-\u0333\u033d-\u0346\u034a-\u034c\u0350-\u0352\u0357-\u0358\u035c-\u0362\u0374\u037e\u0387\u0591-\u05af\u05c4\u0610-\u0617\u0653-\u0654\u0657-\u065b\u065d-\u065e\u06df-\u06e2\u06eb-\u06ec\u0730\u0732-\u0733\u0735-\u0736\u073a\u073d\u073f-\u0741\u0743\u0745\u0747\u07eb-\u07f1\u0951\u0958-\u095f\u09dc-\u09dd\u09df\u0a33\u0a36\u0a59-\u0a5b\u0a5e\u0b5c-\u0b5d\u0e38-\u0e39\u0f43\u0f4d\u0f52\u0f57\u0f5c\u0f69\u0f72-\u0f76\u0f78\u0f80-\u0f83\u0f93\u0f9d\u0fa2\u0fa7\u0fac\u0fb9\u1939-\u193a\u1a17\u1b6b\u1cda-\u1cdb\u1dc0-\u1dcf\u1dfc\u1dfe\u1f71\u1f73\u1f75\u1f77\u1f79\u1f7b\u1f7d\u1fbb\u1fbe\u1fc9\u1fcb\u1fd3\u1fdb\u1fe3\u1feb\u1fee-\u1fef\u1ff9\u1ffb\u1ffd\u2000-\u2001\u20d0-\u20d1\u20d4-\u20d7\u20e7-\u20e9\u2126\u212a-\u212b\u2329-\u232a\u2adc\u302b-\u302c\uaab2-\uaab3\uf900-\ufa0d\ufa10\ufa12\ufa15-\ufa1e\ufa20\ufa22\ufa25-\ufa26\ufa2a-\ufa2d\ufa30-\ufa6d\ufa70-\ufad9\ufb1d\ufb1f\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40-\ufb41\ufb43-\ufb44\ufb46-\ufb4e\ufff0-\uffff]/g,
extra_lookup;
// JSON Quote string. Use native implementation when possible.
var JSONQuote = (JSON && JSON.stringify) || function(string) {
json_escapable.lastIndex = 0;
if (json_escapable.test(string)) {
string = string.replace(json_escapable, function(a) {
return json_lookup[a];
});
}
return '"' + string + '"';
};
// This may be quite slow, so let's delay until user actually uses bad
// characters.
var unroll_lookup = function(escapable) {
var i;
var unrolled = {}
var c = []
for(i=0; i<65536; i++) {
c.push( String.fromCharCode(i) );
}
escapable.lastIndex = 0;
c.join('').replace(escapable, function (a) {
unrolled[ a ] = '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
return '';
});
escapable.lastIndex = 0;
return unrolled;
};
// Quote string, also taking care of unicode characters that browsers
// often break. Especially, take care of unicode surrogates:
// http://en.wikipedia.org/wiki/Mapping_of_Unicode_characters#Surrogates
utils.quote = function(string) {
var quoted = JSONQuote(string);
// In most cases this should be very fast and good enough.
extra_escapable.lastIndex = 0;
if(!extra_escapable.test(quoted)) {
return quoted;
}
if(!extra_lookup) extra_lookup = unroll_lookup(extra_escapable);
return quoted.replace(extra_escapable, function(a) {
return extra_lookup[a];
});
}
var _all_protocols = ['websocket',
'xdr-streaming',
'xhr-streaming',
'iframe-eventsource',
'iframe-htmlfile',
'xdr-polling',
'xhr-polling',
'iframe-xhr-polling',
'jsonp-polling'];
utils.probeProtocols = function() {
var probed = {};
for(var i=0; i<_all_protocols.length; i++) {
var protocol = _all_protocols[i];
// User can have a typo in protocol name.
probed[protocol] = SockJS[protocol] &&
SockJS[protocol].enabled();
}
return probed;
};
utils.detectProtocols = function(probed, protocols_whitelist, info) {
var pe = {},
protocols = [];
if (!protocols_whitelist) protocols_whitelist = _all_protocols;
for(var i=0; i<protocols_whitelist.length; i++) {
var protocol = protocols_whitelist[i];
pe[protocol] = probed[protocol];
}
var maybe_push = function(protos) {
var proto = protos.shift();
if (pe[proto]) {
protocols.push(proto);
} else {
if (protos.length > 0) {
maybe_push(protos);
}
}
}
// 1. Websocket
if (info.websocket !== false) {
maybe_push(['websocket']);
}
// 2. Streaming
if (pe['xhr-streaming'] && !info.null_origin) {
protocols.push('xhr-streaming');
} else {
if (pe['xdr-streaming'] && !info.cookie_needed && !info.null_origin) {
protocols.push('xdr-streaming');
} else {
maybe_push(['iframe-eventsource',
'iframe-htmlfile']);
}
}
// 3. Polling
if (pe['xhr-polling'] && !info.null_origin) {
protocols.push('xhr-polling');
} else {
if (pe['xdr-polling'] && !info.cookie_needed && !info.null_origin) {
protocols.push('xdr-polling');
} else {
maybe_push(['iframe-xhr-polling',
'jsonp-polling']);
}
}
return protocols;
}
// [*] End of lib/utils.js
// [*] Including lib/dom.js
/*
* ***** BEGIN LICENSE BLOCK *****
* Copyright (c) 2011-2012 VMware, Inc.
*
* For the license see COPYING.
* ***** END LICENSE BLOCK *****
*/
// May be used by htmlfile jsonp and transports.
var MPrefix = '_sockjs_global';
utils.createHook = function() {
var window_id = 'a' + utils.random_string(8);
if (!(MPrefix in _window)) {
var map = {};
_window[MPrefix] = function(window_id) {
if (!(window_id in map)) {
map[window_id] = {
id: window_id,
del: function() {delete map[window_id];}
};
}
return map[window_id];
}
}
return _window[MPrefix](window_id);
};
utils.attachMessage = function(listener) {
utils.attachEvent('message', listener);
};
utils.attachEvent = function(event, listener) {
if (typeof _window.addEventListener !== 'undefined') {
_window.addEventListener(event, listener, false);
} else {
// IE quirks.
// According to: http://stevesouders.com/misc/test-postmessage.php
// the message gets delivered only to 'document', not 'window'.
_document.attachEvent("on" + event, listener);
// I get 'window' for ie8.
_window.attachEvent("on" + event, listener);
}
};
utils.detachMessage = function(listener) {
utils.detachEvent('message', listener);
};
utils.detachEvent = function(event, listener) {
if (typeof _window.addEventListener !== 'undefined') {
_window.removeEventListener(event, listener, false);
} else {
_document.detachEvent("on" + event, listener);
_window.detachEvent("on" + event, listener);
}
};
var on_unload = {};
// Things registered after beforeunload are to be called immediately.
var after_unload = false;
var trigger_unload_callbacks = function() {
for(var ref in on_unload) {
on_unload[ref]();
delete on_unload[ref];
};
};
var unload_triggered = function() {
if(after_unload) return;
after_unload = true;
trigger_unload_callbacks();
};
// 'unload' alone is not reliable in opera within an iframe, but we
// can't use `beforeunload` as IE fires it on javascript: links.
utils.attachEvent('unload', unload_triggered);
utils.unload_add = function(listener) {
var ref = utils.random_string(8);
on_unload[ref] = listener;
if (after_unload) {
utils.delay(trigger_unload_callbacks);
}
return ref;
};
utils.unload_del = function(ref) {
if (ref in on_unload)
delete on_unload[ref];
};
utils.createIframe = function (iframe_url, error_callback) {
var iframe = _document.createElement('iframe');
var tref, unload_ref;
var unattach = function() {
clearTimeout(tref);
// Explorer had problems with that.
try {iframe.onload = null;} catch (x) {}
iframe.onerror = null;
};
var cleanup = function() {
if (iframe) {
unattach();
// This timeout makes chrome fire onbeforeunload event
// within iframe. Without the timeout it goes straight to
// onunload.
setTimeout(function() {
if(iframe) {
iframe.parentNode.removeChild(iframe);
}
iframe = null;
}, 0);
utils.unload_del(unload_ref);
}
};
var onerror = function(r) {
if (iframe) {
cleanup();
error_callback(r);
}
};
var post = function(msg, origin) {
try {
// When the iframe is not loaded, IE raises an exception
// on 'contentWindow'.
if (iframe && iframe.contentWindow) {
iframe.contentWindow.postMessage(msg, origin);
}
} catch (x) {};
};
iframe.src = iframe_url;
iframe.style.display = 'none';
iframe.style.position = 'absolute';
iframe.onerror = function(){onerror('onerror');};
iframe.onload = function() {
// `onload` is triggered before scripts on the iframe are
// executed. Give it few seconds to actually load stuff.
clearTimeout(tref);
tref = setTimeout(function(){onerror('onload timeout');}, 2000);
};
_document.body.appendChild(iframe);
tref = setTimeout(function(){onerror('timeout');}, 15000);
unload_ref = utils.unload_add(cleanup);
return {
post: post,
cleanup: cleanup,
loaded: unattach
};
};
utils.createHtmlfile = function (iframe_url, error_callback) {
var doc = new ActiveXObject('htmlfile');
var tref, unload_ref;
var iframe;
var unattach = function() {
clearTimeout(tref);
};
var cleanup = function() {
if (doc) {
unattach();
utils.unload_del(unload_ref);
iframe.parentNode.removeChild(iframe);
iframe = doc = null;
//CollectGarbage();
}
};
var onerror = function(r) {
if (doc) {
cleanup();
error_callback(r);
}
};
var post = function(msg, origin) {
try {
// When the iframe is not loaded, IE raises an exception
// on 'contentWindow'.
if (iframe && iframe.contentWindow) {
iframe.contentWindow.postMessage(msg, origin);
}
} catch (x) {};
};
doc.open();
doc.write('<html><s' + 'cript>' +
'document.domain="' + document.domain + '";' +
'</s' + 'cript></html>');
doc.close();
doc.parentWindow[WPrefix] = _window[WPrefix];
var c = doc.createElement('div');
doc.body.appendChild(c);
iframe = doc.createElement('iframe');
c.appendChild(iframe);
iframe.src = iframe_url;
tref = setTimeout(function(){onerror('timeout');}, 15000);
unload_ref = utils.unload_add(cleanup);
return {
post: post,
cleanup: cleanup,
loaded: unattach
};
};
// [*] End of lib/dom.js
// [*] Including lib/dom2.js
/*
* ***** BEGIN LICENSE BLOCK *****
* Copyright (c) 2011-2012 VMware, Inc.
*
* For the license see COPYING.
* ***** END LICENSE BLOCK *****
*/
var AbstractXHRObject = function(){};
AbstractXHRObject.prototype = new EventEmitter(['chunk', 'finish']);
AbstractXHRObject.prototype._start = function(method, url, payload, opts) {
var that = this;
try {
that.xhr = new XMLHttpRequest();
} catch(x) {};
if (!that.xhr) {
try {
that.xhr = new _window.ActiveXObject('Microsoft.XMLHTTP');
} catch(x) {};
}
if (_window.ActiveXObject || _window.XDomainRequest) {
// IE8 caches even POSTs
url += ((url.indexOf('?') === -1) ? '?' : '&') + 't='+(+new Date);
}
// Explorer tends to keep connection open, even after the
// tab gets closed: http://bugs.jquery.com/ticket/5280
that.unload_ref = utils.unload_add(function(){that._cleanup(true);});
try {
that.xhr.open(method, url, true);
} catch(e) {
// IE raises an exception on wrong port.
that.emit('finish', 0, '');
that._cleanup();
return;
};
if (!opts || !opts.no_credentials) {
// Mozilla docs says https://developer.mozilla.org/en/XMLHttpRequest :
// "This never affects same-site requests."
that.xhr.withCredentials = 'true';
}
if (opts && opts.headers) {
for(var key in opts.headers) {
that.xhr.setRequestHeader(key, opts.headers[key]);
}
}
that.xhr.onreadystatechange = function() {
if (that.xhr) {
var x = that.xhr;
switch (x.readyState) {
case 3:
// IE doesn't like peeking into responseText or status
// on Microsoft.XMLHTTP and readystate=3
try {
var status = x.status;
var text = x.responseText;
} catch (x) {};
// IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450
if (status === 1223) status = 204;
// IE does return readystate == 3 for 404 answers.
if (text && text.length > 0) {
that.emit('chunk', status, text);
}
break;
case 4:
var status = x.status;
// IE returns 1223 for 204: http://bugs.jquery.com/ticket/1450
if (status === 1223) status = 204;
that.emit('finish', status, x.responseText);
that._cleanup(false);
break;
}
}
};
that.xhr.send(payload);
};
AbstractXHRObject.prototype._cleanup = function(abort) {
var that = this;
if (!that.xhr) return;
utils.unload_del(that.unload_ref);
// IE needs this field to be a function
that.xhr.onreadystatechange = function(){};
if (abort) {
try {
that.xhr.abort();
} catch(x) {};
}
that.unload_ref = that.xhr = null;
};
AbstractXHRObject.prototype.close = function() {
var that = this;
that.nuke();
that._cleanup(true);
};
var XHRCorsObject = utils.XHRCorsObject = function() {
var that = this, args = arguments;
utils.delay(function(){that._start.apply(that, args);});
};
XHRCorsObject.prototype = new AbstractXHRObject();
var XHRLocalObject = utils.XHRLocalObject = function(method, url, payload) {
var that = this;
utils.delay(function(){
that._start(method, url, payload, {
no_credentials: true
});
});
};
XHRLocalObject.prototype = new AbstractXHRObject();
// References:
// http://ajaxian.com/archives/100-line-ajax-wrapper
// http://msdn.microsoft.com/en-us/library/cc288060(v=VS.85).aspx
var XDRObject = utils.XDRObject = function(method, url, payload) {
var that = this;
utils.delay(function(){that._start(method, url, payload);});
};
XDRObject.prototype = new EventEmitter(['chunk', 'finish']);
XDRObject.prototype._start = function(method, url, payload) {
var that = this;
var xdr = new XDomainRequest();
// IE caches even POSTs
url += ((url.indexOf('?') === -1) ? '?' : '&') + 't='+(+new Date);
var onerror = xdr.ontimeout = xdr.onerror = function() {
that.emit('finish', 0, '');
that._cleanup(false);
};
xdr.onprogress = function() {
that.emit('chunk', 200, xdr.responseText);
};
xdr.onload = function() {
that.emit('finish', 200, xdr.responseText);
that._cleanup(false);
};
that.xdr = xdr;
that.unload_ref = utils.unload_add(function(){that._cleanup(true);});
try {
// Fails with AccessDenied if port number is bogus
that.xdr.open(method, url);
that.xdr.send(payload);
} catch(x) {
onerror();
}
};
XDRObject.prototype._cleanup = function(abort) {
var that = this;
if (!that.xdr) return;
utils.unload_del(that.unload_ref);
that.xdr.ontimeout = that.xdr.onerror = that.xdr.onprogress =
that.xdr.onload = null;
if (abort) {
try {
that.xdr.abort();
} catch(x) {};
}
that.unload_ref = that.xdr = null;
};
XDRObject.prototype.close = function() {
var that = this;
that.nuke();
that._cleanup(true);
};
// 1. Is natively via XHR
// 2. Is natively via XDR
// 3. Nope, but postMessage is there so it should work via the Iframe.
// 4. Nope, sorry.
utils.isXHRCorsCapable = function() {
if (_window.XMLHttpRequest && 'withCredentials' in new XMLHttpRequest()) {
return 1;
}
// XDomainRequest doesn't work if page is served from file://
if (_window.XDomainRequest && _document.domain) {
return 2;
}
if (IframeTransport.enabled()) {
return 3;
}
return 4;
};
// [*] End of lib/dom2.js
// [*] Including lib/sockjs.js
/*
* ***** BEGIN LICENSE BLOCK *****
* Copyright (c) 2011-2012 VMware, Inc.
*
* For the license see COPYING.
* ***** END LICENSE BLOCK *****
*/
var SockJS = function(url, dep_protocols_whitelist, options) {
if (this === _window) {
// makes `new` optional
return new SockJS(url, dep_protocols_whitelist, options);
}
var that = this, protocols_whitelist;
that._options = {devel: false, debug: false, protocols_whitelist: [],
info: undefined, rtt: undefined};
if (options) {
utils.objectExtend(that._options, options);
}
that._base_url = utils.amendUrl(url);
that._server = that._options.server || utils.random_number_string(1000);
if (that._options.protocols_whitelist &&
that._options.protocols_whitelist.length) {
protocols_whitelist = that._options.protocols_whitelist;
} else {
// Deprecated API
if (typeof dep_protocols_whitelist === 'string' &&
dep_protocols_whitelist.length > 0) {
protocols_whitelist = [dep_protocols_whitelist];
} else if (utils.isArray(dep_protocols_whitelist)) {
protocols_whitelist = dep_protocols_whitelist
} else {
protocols_whitelist = null;
}
if (protocols_whitelist) {
that._debug('Deprecated API: Use "protocols_whitelist" option ' +
'instead of supplying protocol list as a second ' +
'parameter to SockJS constructor.');
}
}
that._protocols = [];
that.protocol = null;
that.readyState = SockJS.CONNECTING;
that._ir = createInfoReceiver(that._base_url);
that._ir['onfinish'] = function(info, rtt) {
that._ir = null;
if (info) {
if (that._options.info) {
// Override if user supplies the option
info = utils.objectExtend(info, that._options.info);
}
if (that._options.rtt) {
rtt = that._options.rtt;
}
that._applyInfo(info, rtt, protocols_whitelist);
that._didClose();
} else {
that._didClose(1002, 'Can\'t connect to server', true);
}
};
};
// Inheritance
SockJS.prototype = new REventTarget();
SockJS.version = "0.3.4";
SockJS.CONNECTING = 0;
SockJS.OPEN = 1;
SockJS.CLOSING = 2;