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f0e57b86c4cb65ea655670d154e9508e12e2c46f
socket.io/dist/socket.io.js
Arnout Kazemier f0e57b86c4 Added builder again
2011-06-09 19:46:04 +02:00

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/*! Socket.IO.js build:0.7.0, development. Copyright(c) 2011 LearnBoost <dev@learnboost.com> MIT Licensed */
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports) {
/**
* IO namespace.
*
* @namespace
*/
var io = exports;
/**
* Socket.IO version
*
* @api public
*/
io.version = '0.7.0';
/**
* Protocol implemented.
*
* @api public
*/
io.protocol = 1;
/**
* Available transports
*
* @api public
*/
io.transports = [
'websocket'
, 'htmlfile'
, 'xhr-polling'
, 'jsonp-polling'
];
/**
* Keep track of jsonp callbacks.
*
* @api private
*/
io.j = [];
/**
* Keep track of our io.Sockets
*
* @api private
*/
io.sockets = {};
/**
* Manages connections to hosts.
*
* @param {String} uri
* @Param {Boolean} force creation of new socket (defaults to false)
* @api public
*/
io.connect = function (host, forceNew) {
var uri = io.util.parseUri(host)
, uuri = io.util.uniqueUri(uri);
if (forceNew || !io.sockets[uuri]) {
var socket = new io.Socket({
host: uri.host
, secure: uri.protocol == 'https://'
, port: uri.port || 80
});
}
if (!forceNew) {
this.sockets[uuri] = socket;
}
// if path is different from '' or /
return socket.of(uri.path.length > 1 ? uri.path : '');
};
})('object' === typeof module ? module.exports : (window.io = {}));
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports) {
/**
* Utilities namespace.
*
* @namespace
*/
var util = exports.util = {};
/**
* Parses an URI
*
* @author Steven Levithan <stevenlevithan.com> (MIT license)
* @api public
*/
var re = /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;
var parts = ['source', 'protocol', 'authority', 'userInfo', 'user', 'password',
'host', 'port', 'relative', 'path', 'directory', 'file', 'query',
'anchor'];
util.parseUri = function (str) {
var m = re.exec(str || '')
, uri = {}
, i = 14;
while (i--) {
uri[parts[i]] = m[i] || '';
}
return uri;
};
/**
* Produces a unique url that identifies a Socket.IO connection.
*
* @param {Object} uri
* @api public
*/
util.uniqueUri = function (uri) {
var protocol = uri.protocol
, host = uri.host
, port = uri.port;
if ('undefined' != typeof document) {
host = host || document.domain;
port = port || document.location.port;
} else {
host = host || 'localhost';
}
return (protocol || 'http') + '://' + host + ':' +
(port || protocol && protocol === 'https' ? 443 : 80);
};
/**
* Executes the given function when the page is loaded.
*
* io.util.load(function () { console.log('page loaded'); });
*
* @param {Function} fn
* @api public
*/
var pageLoaded = false;
util.load = function (fn) {
if (document.readyState === 'complete' || pageLoaded) {
return fn();
}
util.on(window, 'load', fn, false);
};
/**
* Adds an event.
*
* @api private
*/
util.on = function (element, event, fn, capture) {
if (element.attachEvent) {
element.attachEvent('on' + event, fn);
} else {
element.addEventListener(event, fn, capture);
}
};
/**
* Generates the correct `XMLHttpRequest` for regular and cross domain requests.
*
* @param {Boolean} [xdomain] Create a request that can be used cross domain.
* @returns {XMLHttpRequest|false} If we can create a XMLHttpRequest.
* @api private
*/
var hasCORS = 'undefined' != typeof window && window.XMLHttpRequest &&
(function () {
var a = new XMLHttpRequest();
return a.withCredentials != undefined;
})();
util.request = function (xdomain) {
if ('undefined' != typeof window) {
if (xdomain && window.XDomainRequest) {
return new XDomainRequest();
};
if (window.XMLHttpRequest && (!xdomain || hasCORS)) {
return new XMLHttpRequest();
};
if (!xdomain) {
try {
return new window.ActiveXObject('Microsoft.XMLHTTP');
} catch(e) { }
}
}
return null;
};
/**
* XHR based transport constructor.
*
* @constructor
* @api public
*/
/**
* Change the internal pageLoaded value.
*/
if ('undefined' != typeof window) {
util.load(function () {
pageLoaded = true;
});
}
/**
* Defers a function to ensure a spinner is not displayed by the browser
*
* @param {Function} fn
* @api public
*/
util.defer = function (fn) {
if (!util.ua.webkit) {
return fn();
}
util.load(function () {
setTimeout(fn, 100);
});
};
/**
* Merges two objects.
*
* @api public
*/
util.merge = function merge(target, additional, deep, lastseen){
var seen = lastseen || []
, depth = typeof deep == 'undefined' ? 2 : deep
, prop;
for (prop in additional){
if (additional.hasOwnProperty(prop) && this.indexOf(seen, prop) < 0){
if (typeof target[prop] !== 'object' || !depth){
target[prop] = additional[prop];
seen.push(additional[prop]);
} else {
this.merge(target[prop], additional[prop], depth - 1, seen);
}
}
}
return target;
};
/**
* Merges prototypes from objects
*
* @api public
*/
util.mixin = function (ctor, ctor2) {
util.merge(ctor.prototype, ctor2.prototype);
};
/**
* Shortcut for prototypical and static inheritance.
*
* @api private
*/
util.inherit = function (ctor, ctor2) {
ctor.prototype = new ctor2;
util.merge(ctor, ctor2);
};
/**
* Checks if the given object is an Array.
*
* io.util.isArray([]); // true
* io.util.isArray({}); // false
*
* @param Object obj
* @api public
*/
util.isArray = Array.isArray || function (obj) {
return Object.prototype.toString.call(obj) === '[object Array]';
};
/**
* Intersects values of two arrays into a third
*
* @api public
*/
util.intersect = function (arr, arr2) {
var ret = []
, longest = arr.length > arr2.length ? arr : arr2
, shortest = arr.length > arr2.length ? arr2 : arr
for (var i = 0, l = shortest.length; i < l; i++) {
if (~util.indexOf(longest, shortest[i]))
ret.push(shortest[i]);
}
return ret;
}
/**
* Array indexOf compatibility.
*
* @see bit.ly/a5Dxa2
* @api public
*/
util.indexOf = function (arr, o, i) {
if (Array.prototype.indexOf) {
return Array.prototype.indexOf.call(arr, o, i);
}
for (var j = arr.length, i = i < 0 ? i + j < 0 ? 0 : i + j : i || 0
; i < j && arr[i] !== o; i++);
return j <= i ? -1 : i;
};
/**
* UA / engines detection namespace.
*
* @namespace
*/
util.ua = {};
/**
* Detect webkit.
*
* @api public
*/
util.ua.webkit = 'undefined' != typeof navigator
&& /webkit/i.test(navigator.userAgent);
})('undefined' != typeof window ? io : module.exports);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Expose constructor.
*/
exports.EventEmitter = EventEmitter;
/**
* Event emitter constructor.
*
* @api public.
*/
function EventEmitter () {};
/**
* Adds a listener
*
* @api public
*/
EventEmitter.prototype.on = function (name, fn) {
if (!this.$events) {
this.$events = {};
}
if (!this.$events[name]) {
this.$events[name] = fn;
} else if (io.util.isArray(this.$events[name])) {
this.$events[name].push(fn);
} else {
this.$events[name] = [this.$events[name], fn];
}
return this;
};
EventEmitter.prototype.addListener = EventEmitter.prototype.on;
/**
* Adds a volatile listener.
*
* @api public
*/
EventEmitter.prototype.once = function (name, fn) {
var self = this;
function on () {
self.removeListener(name, on);
fn.apply(this, arguments);
};
on.listener = fn;
this.on(name, on);
return this;
};
/**
* Removes a listener.
*
* @api public
*/
EventEmitter.prototype.removeListener = function (name, fn) {
if (this.$events && this.$events[name]) {
var list = this.$events[name];
if (io.util.isArray(list)) {
var pos = -1;
for (var i = 0, l = list.length; i < l; i++) {
if (list[i] === fn || (list[i].listener && list[i].listener === fn)) {
pos = i;
break;
}
}
if (pos < 0) {
return this;
}
list.splice(pos, 1);
if (!list.length) {
delete this.$events[name];
}
} else if (list === fn || (list.listener && list.listener === fn)) {
delete this.$events[name];
}
}
return this;
};
/**
* Removes all listeners for an event.
*
* @api public
*/
EventEmitter.prototype.removeAllListeners = function (name) {
if (name === undefined) {
this.$events = {};
return this;
}
if (this.$events && this.$events[name]) {
this.$events[name] = null;
}
return this;
};
/**
* Gets all listeners for a certain event.
*
* @api publci
*/
EventEmitter.prototype.listeners = function (name) {
if (!this.$events) {
this.$events = {};
}
if (!this.$events[name]) {
this.$events[name] = [];
}
if (!io.util.isArray(this.$events[name])) {
this.$events[name] = [this.$events[name]];
}
return this.$events[name];
};
/**
* Emits an event.
*
* @api public
*/
EventEmitter.prototype.emit = function (name) {
if (!this.$events) {
return false;
}
var handler = this.$events[name];
if (!handler) {
return false;
}
var args = Array.prototype.slice.call(arguments, 1);
if ('function' == typeof handler) {
handler.apply(this, args);
} else if (io.util.isArray(handler)) {
var listeners = handler.slice();
for (var i = 0, l = listeners.length; i < l; i++) {
listeners[i].apply(this, args);
}
} else {
return false;
}
return true;
};
})(
'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
/**
* Based on JSON2 (http://www.JSON.org/js.html).
*/
(function (exports, nativeJSON) {
"use strict";
// use native JSON if it's available
if (nativeJSON && nativeJSON.parse){
return exports.JSON = {
parse: nativeJSON.parse
, stringify: nativeJSON.stringify
}
}
var JSON = exports.JSON = {};
function f(n) {
// Format integers to have at least two digits.
return n < 10 ? '0' + n : n;
}
function date(d, key) {
return isFinite(d.valueOf()) ?
d.getUTCFullYear() + '-' +
f(d.getUTCMonth() + 1) + '-' +
f(d.getUTCDate()) + 'T' +
f(d.getUTCHours()) + ':' +
f(d.getUTCMinutes()) + ':' +
f(d.getUTCSeconds()) + 'Z' : null;
};
var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
gap,
indent,
meta = { // table of character substitutions
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
'"' : '\\"',
'\\': '\\\\'
},
rep;
function quote(string) {
// If the string contains no control characters, no quote characters, and no
// backslash characters, then we can safely slap some quotes around it.
// Otherwise we must also replace the offending characters with safe escape
// sequences.
escapable.lastIndex = 0;
return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
var c = meta[a];
return typeof c === 'string' ? c :
'\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
}) + '"' : '"' + string + '"';
}
function str(key, holder) {
// Produce a string from holder[key].
var i, // The loop counter.
k, // The member key.
v, // The member value.
length,
mind = gap,
partial,
value = holder[key];
// If the value has a toJSON method, call it to obtain a replacement value.
if (value instanceof Date) {
value = date(key);
}
// If we were called with a replacer function, then call the replacer to
// obtain a replacement value.
if (typeof rep === 'function') {
value = rep.call(holder, key, value);
}
// What happens next depends on the value's type.
switch (typeof value) {
case 'string':
return quote(value);
case 'number':
// JSON numbers must be finite. Encode non-finite numbers as null.
return isFinite(value) ? String(value) : 'null';
case 'boolean':
case 'null':
// If the value is a boolean or null, convert it to a string. Note:
// typeof null does not produce 'null'. The case is included here in
// the remote chance that this gets fixed someday.
return String(value);
// If the type is 'object', we might be dealing with an object or an array or
// null.
case 'object':
// Due to a specification blunder in ECMAScript, typeof null is 'object',
// so watch out for that case.
if (!value) {
return 'null';
}
// Make an array to hold the partial results of stringifying this object value.
gap += indent;
partial = [];
// Is the value an array?
if (Object.prototype.toString.apply(value) === '[object Array]') {
// The value is an array. Stringify every element. Use null as a placeholder
// for non-JSON values.
length = value.length;
for (i = 0; i < length; i += 1) {
partial[i] = str(i, value) || 'null';
}
// Join all of the elements together, separated with commas, and wrap them in
// brackets.
v = partial.length === 0 ? '[]' : gap ?
'[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :
'[' + partial.join(',') + ']';
gap = mind;
return v;
}
// If the replacer is an array, use it to select the members to be stringified.
if (rep && typeof rep === 'object') {
length = rep.length;
for (i = 0; i < length; i += 1) {
if (typeof rep[i] === 'string') {
k = rep[i];
v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
} else {
// Otherwise, iterate through all of the keys in the object.
for (k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
v = str(k, value);
if (v) {
partial.push(quote(k) + (gap ? ': ' : ':') + v);
}
}
}
}
// Join all of the member texts together, separated with commas,
// and wrap them in braces.
v = partial.length === 0 ? '{}' : gap ?
'{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :
'{' + partial.join(',') + '}';
gap = mind;
return v;
}
}
// If the JSON object does not yet have a stringify method, give it one.
JSON.stringify = function (value, replacer, space) {
// The stringify method takes a value and an optional replacer, and an optional
// space parameter, and returns a JSON text. The replacer can be a function
// that can replace values, or an array of strings that will select the keys.
// A default replacer method can be provided. Use of the space parameter can
// produce text that is more easily readable.
var i;
gap = '';
indent = '';
// If the space parameter is a number, make an indent string containing that
// many spaces.
if (typeof space === 'number') {
for (i = 0; i < space; i += 1) {
indent += ' ';
}
// If the space parameter is a string, it will be used as the indent string.
} else if (typeof space === 'string') {
indent = space;
}
// If there is a replacer, it must be a function or an array.
// Otherwise, throw an error.
rep = replacer;
if (replacer && typeof replacer !== 'function' &&
(typeof replacer !== 'object' ||
typeof replacer.length !== 'number')) {
throw new Error('JSON.stringify');
}
// Make a fake root object containing our value under the key of ''.
// Return the result of stringifying the value.
return str('', {'': value});
};
// If the JSON object does not yet have a parse method, give it one.
JSON.parse = function (text, reviver) {
// The parse method takes a text and an optional reviver function, and returns
// a JavaScript value if the text is a valid JSON text.
var j;
function walk(holder, key) {
// The walk method is used to recursively walk the resulting structure so
// that modifications can be made.
var k, v, value = holder[key];
if (value && typeof value === 'object') {
for (k in value) {
if (Object.prototype.hasOwnProperty.call(value, k)) {
v = walk(value, k);
if (v !== undefined) {
value[k] = v;
} else {
delete value[k];
}
}
}
}
return reviver.call(holder, key, value);
}
// Parsing happens in four stages. In the first stage, we replace certain
// Unicode characters with escape sequences. JavaScript handles many characters
// incorrectly, either silently deleting them, or treating them as line endings.
text = String(text);
cx.lastIndex = 0;
if (cx.test(text)) {
text = text.replace(cx, function (a) {
return '\\u' +
('0000' + a.charCodeAt(0).toString(16)).slice(-4);
});
}
// In the second stage, we run the text against regular expressions that look
// for non-JSON patterns. We are especially concerned with '()' and 'new'
// because they can cause invocation, and '=' because it can cause mutation.
// But just to be safe, we want to reject all unexpected forms.
// We split the second stage into 4 regexp operations in order to work around
// crippling inefficiencies in IE's and Safari's regexp engines. First we
// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
// replace all simple value tokens with ']' characters. Third, we delete all
// open brackets that follow a colon or comma or that begin the text. Finally,
// we look to see that the remaining characters are only whitespace or ']' or
// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
if (/^[\],:{}\s]*$/
.test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
.replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
// In the third stage we use the eval function to compile the text into a
// JavaScript structure. The '{' operator is subject to a syntactic ambiguity
// in JavaScript: it can begin a block or an object literal. We wrap the text
// in parens to eliminate the ambiguity.
j = eval('(' + text + ')');
// In the optional fourth stage, we recursively walk the new structure, passing
// each name/value pair to a reviver function for possible transformation.
return typeof reviver === 'function' ?
walk({'': j}, '') : j;
}
// If the text is not JSON parseable, then a SyntaxError is thrown.
throw new SyntaxError('JSON.parse');
};
}('undefined' != typeof io ? io : module.exports, JSON));
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Parser namespace.
*
* @namespace
*/
var parser = exports.parser = {};
/**
* Packet types.
*/
var packets = parser.packets = [
'disconnect'
, 'connect'
, 'heartbeat'
, 'message'
, 'json'
, 'event'
, 'ack'
, 'error'
];
/**
* Errors reasons.
*/
var reasons = parser.reasons = [
'transport not supported'
, 'client not handshaken'
, 'unauthorized'
];
/**
* Errors advice.
*/
var advice = parser.advice = [
'reconnect'
];
/**
* Shortcuts.
*/
var JSON = io.JSON
, indexOf = io.util.indexOf;
/**
* Encodes a packet.
*
* @api private
*/
parser.encodePacket = function (packet) {
var type = packets.indexOf(packet.type)
, id = packet.id || ''
, endpoint = packet.endpoint || ''
, ack = packet.ack
, data = null;
switch (packet.type) {
case 'error':
var reason = packet.reason ? reasons.indexOf(packet.reason) : ''
, adv = packet.advice ? advice.indexOf(packet.advice) : ''
if (reason !== '' || adv !== '')
data = reason + (adv !== '' ? ('+' + adv) : '')
break;
case 'message':
if (packet.data !== '')
data = packet.data;
break;
case 'event':
var params = packet.args && packet.args.length
? JSON.stringify(packet.args) : '';
data = packet.name + (params !== '' ? ('\ufffd' + params) : '');
break;
case 'json':
data = JSON.stringify(packet.data);
break;
case 'connect':
if (packet.qs)
data = packet.qs;
break;
case 'ack':
data = packet.ackId
+ (packet.args && packet.args.length
? '+' + JSON.stringify(packet.args) : '');
break;
case 'heartbeat':
case 'disconect':
break;
}
// construct packet with required fragments
var encoded = [
type
, id + (ack == 'data' ? '+' : '')
, endpoint
];
// data fragment is optional
if (data !== null && data !== undefined)
encoded.push(data);
return encoded.join(':');
};
/**
* Encodes multiple messages (payload).
*
* @param {Array} messages
* @api private
*/
parser.encodePayload = function (packets) {
var decoded = '';
if (packets.length == 1)
return packets[0];
for (var i = 0, l = packets.length; i < l; i++) {
var packet = packets[i];
decoded += '\ufffd' + packet.length + '\ufffd' + packets[i]
}
return decoded;
};
/**
* Decodes a packet
*
* @api private
*/
var regexp = /^([^:]+):([0-9]+)?(\+)?:([^:]+)?:?(.*)?$/;
parser.decodePacket = function (data) {
var pieces = data.match(regexp);
if (!pieces) return {};
var id = pieces[2] || ''
, data = pieces[5] || ''
, packet = {
type: packets[pieces[1]]
, endpoint: pieces[4] || ''
};
// whether we need to acknowledge the packet
if (id) {
packet.id = id;
if (pieces[3])
packet.ack = 'data';
else
packet.ack = true;
}
// handle different packet types
switch (packet.type) {
case 'error':
var pieces = data.split('+');
packet.reason = reasons[pieces[0]] || '';
packet.advice = advice[pieces[1]] || '';
break;
case 'message':
packet.data = data || '';
break;
case 'event':
var pieces = data.match(/([^\ufffd]+)(\ufffd)?(.*)/);
packet.name = pieces[1] || '';
packet.args = [];
if (pieces[3]) {
try {
packet.args = JSON.parse(pieces[3]);
} catch (e) { }
}
break;
case 'json':
try {
packet.data = JSON.parse(data);
} catch (e) { }
break;
case 'connect':
packet.qs = data || '';
break;
case 'ack':
var pieces = data.match(/^([0-9]+)(\+)?(.*)/);
if (pieces) {
packet.ackId = pieces[1];
packet.args = [];
if (pieces[3]) {
try {
packet.args = pieces[3] ? JSON.parse(pieces[3]) : [];
} catch (e) { }
}
}
break;
case 'disconnect':
case 'heartbeat':
break;
};
return packet;
};
/**
* Decodes data payload. Detects multiple messages
*
* @return {Array} messages
* @api public
*/
parser.decodePayload = function (data) {
if (data[0] == '\ufffd') {
var ret = [];
for (var i = 1, length = ''; i < data.length; i++) {
if (data[i] == '\ufffd') {
ret.push(parser.decodePacket(data.substr(i + 1).substr(0, length)));
i += Number(length) + 1;
length = '';
} else {
length += data[i];
}
}
return ret;
} else {
return [parser.decodePacket(data)];
}
};
})(
'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Expose constructor.
*/
exports.Transport = Transport;
/**
* This is the transport template for all supported transport methods.
*
* @constructor
* @api public
*/
function Transport (socket, sessid) {
this.socket = socket;
this.sessid = sessid;
};
/**
* Apply EventEmitter mixin.
*/
io.util.mixin(Transport, io.EventEmitter);
/**
* Handles the response from the server. When a new response is received
* it will automatically update the timeout, decode the message and
* forwards the response to the onMessage function for further processing.
*
* @param {String} data Response from the server.
* @api private
*/
Transport.prototype.onData = function(data){
this.clearCloseTimeout();
if (data !== '') {
var msgs = io.parser.decodePayload(data);
if (msgs && msgs.length){
for (var i = 0, l = msgs.length; i < l; i++){
this.onPacket(msgs[i]);
}
}
}
return this;
};
/**
* Handles packets.
*
* @api private
*/
Transport.prototype.onPacket = function (packet) {
if (packet.type == 'heartbeat') {
return this.onHeartbeat();
}
if (packet.type == 'disconnect' && packet.endpoint == '') {
return this.onDisconnect();
}
this.socket.onPacket(packet);
return this;
};
/**
* Sets close timeout
*
* @api private
*/
Transport.prototype.setCloseTimeout = function () {
if (!this.closeTimeout) {
var self = this;
this.closeTimeout = setTimeout(function () {
self.onDisconnect();
}, this.socket.closeTimeout);
}
};
/**
* Called when transport disconnects.
*
* @api private
*/
Transport.prototype.onDisconnect = function () {
if (this.close) this.close();
this.clearTimeouts();
this.socket.onDisconnect();
return this;
};
/**
* Clears close timeout
*
* @api private
*/
Transport.prototype.clearCloseTimeout = function () {
if (this.closeTimeout) {
clearTimeout(this.closeTimeout);
this.closeTimeout = null;
}
};
/**
* Clear timeouts
*
* @api private
*/
Transport.prototype.clearTimeouts = function () {
this.clearCloseTimeout();
if (this.reopenTimeout) {
clearTimeout(this.reopenTimeout);
}
};
/**
* Sends a packet
*
* @param {Object} packet object.
* @api private
*/
Transport.prototype.packet = function (packet) {
this.send(io.parser.encodePacket(packet));
};
/**
* Send the received heartbeat message back to server. So the server
* knows we are still connected.
*
* @param {String} heartbeat Heartbeat response from the server.
* @api private
*/
Transport.prototype.onHeartbeat = function (heartbeat) {
this.packet({ type: 'heartbeat' });
};
/**
* Called when the transport opens.
*
* @api private
*/
Transport.prototype.onOpen = function () {
this.clearCloseTimeout();
this.socket.onOpen();
};
/**
* Notifies the base when the connection with the Socket.IO server
* has been disconnected.
*
* @api private
*/
Transport.prototype.onClose = function () {
this.reopenTimeout = setTimeout(function () {
this.open();
}, this.socket.options['reopen delay']);
this.setCloseTimeout();
this.socket.onClose();
};
/**
* Generates a connection url based on the Socket.IO URL Protocol.
* See <https://github.com/learnboost/socket.io-node/> for more details.
*
* @returns {String} Connection url
* @api private
*/
Transport.prototype.prepareUrl = function () {
return this.socket.options.resource + '/' + io.protocol
+ '/' + this.name + '/' + this.sessid;
};
})(
'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Expose constructor.
*/
exports.Socket = Socket;
/**
* Create a new `Socket.IO client` which can establish a persisent
* connection with a Socket.IO enabled server.
*
* @api public
*/
function Socket (options) {
this.options = {
port: 80
, secure: false
, document: document
, resource: 'socket.io'
, transports: io.transports
, 'connect timeout': 10000
, 'try multiple transports': true
, 'reconnect': true
, 'reconnection delay': 500
, 'reopen delay': 3000
, 'max reconnection attempts': 10
, 'sync disconnect on unload': true
, 'auto connect': true
};
io.util.merge(this.options, options);
this.connected = false;
this.open = false;
this.connecting = false;
this.reconnecting = false;
if (this.options['sync disconnect on unload']) {
var self = this;
io.util.on(window, 'beforeunload', function () {
self.disconnect(true);
}, false);
}
if (this.options['auto connect']) {
this.connect();
}
};
/**
* Apply EventEmitter mixin.
*/
io.util.mixin(Socket, io.EventEmitter);
/**
* Returns a namespace listener/emitter for this socket
*
* @api public
*/
Socket.prototype.of = function (name) {
if (!this.namespaces) this.namespaces = {};
if (!this.namespaces[name]) {
this.namespaces[name] = new io.SocketNamespace(this, name);
}
return this.namespaces[name];
};
/**
* Performs the handshake
*
* @api private
*/
function empty () { };
Socket.prototype.handshake = function (fn) {
var self = this;
function complete (data) {
if (data instanceof Error) {
self.onError(data.message);
} else {
fn.apply(null, data.split(':'));
}
};
var url = this.options.resource + '/' + io.protocol + '/?t=' + (+ new Date);
if (this.isXDomain()) {
var insertAt = document.getElementsByTagName('script')[0]
, script = document.createElement('SCRIPT');
script.src = url + '&jsonp=' + io.j.length;
insertAt.parentNode.insertBefore(script, insertAt);
io.j.push(function (data) {
complete(data);
script.parentNode.removeChild(script);
});
} else {
var xhr = io.util.request();
xhr.open('GET', url);
xhr.onreadystatechange = function () {
if (xhr.readyState == 4) {
xhr.onreadystatechange = empty;
if (xhr.status == 200) {
complete(xhr.responseText);
} else {
self.onError(xhr.responseText);
}
}
};
xhr.send(null);
}
};
/**
* Find an available transport based on the options supplied in the constructor.
*
* @api private
*/
Socket.prototype.getTransport = function (override) {
var transports = override || this.transports, match;
for (var i = 0, transport; transport = transports[i]; i++) {
if (io.Transport[transport]
&& io.Transport[transport].check()
&& (!this.isXDomain() || io.Transport[transport].xdomainCheck())) {
return new io.Transport[transport](this, this.sessionid);
}
}
return null;
};
/**
* Connects to the server.
*
* @param {Function} [fn] Callback.
* @returns {io.Socket}
* @api public
*/
Socket.prototype.connect = function (fn) {
if (this.connecting) {
return this;
}
var self = this;
this.handshake(function (sid, close, heartbeat, transports) {
self.sessionid = sid;
self.closeTimeout = close;
self.heartbeatTimeout = heartbeat;
self.transports = io.util.intersect(transports.split(','), self.options.transports);
self.transport = self.getTransport();
if (!self.transport) {
return;
}
self.connecting = true;
self.emit('connecting', self.transport.name);
self.transport.open();
if (self.options.connectTimeout) {
self.connectTimeoutTimer = setTimeout(function () {
if (!self.connected) {
if (self.options['try multiple transports']){
if (!self.remainingTransports) {
self.remainingTransports = self.transports.slice(0);
}
var transports = self.remainingTransports;
while (transports.length > 0 && transports.splice(0,1)[0] !=
self.transport.name) {}
if (transports.length) {
self.transport = self.getTransport(transports);
self.connect();
}
}
if (!self.remainingTransports || self.remainingTransports.length == 0) {
self.emit('connect_failed');
}
}
if(self.remainingTransports && self.remainingTransports.length == 0) {
delete self.remainingTransports;
}
}, self.options['connect timeout']);
}
if (fn && typeof fn == 'function') self.once('connect',fn);
self.onConnect();
});
return this;
};
/**
* Sends a message.
*
* @param {Mixed} data The data that needs to be send to the Socket.IO server.
* @returns {io.Socket}
* @api public
*/
Socket.prototype.packet = function (data) {
this.transport.packet(data);
return this;
};
/**
* Disconnect the established connect.
*
* @returns {io.Socket}
* @api public
*/
Socket.prototype.disconnect = function (sync) {
if (this.connected) {
if (this.open) {
this.of('').packet({ type: 'disconnect' });
}
// ensure disconnection
var xhr = io.util.request();
xhr.open('GET', this.resource + '/' + io.protocol + '/' + this.sessionid);
if (sync) {
xhr.sync = true;
}
// handle disconnection immediately
this.onDisconnect();
}
return this;
};
/**
* Check if we need to use cross domain enabled transports. Cross domain would
* be a different port or different domain name.
*
* @returns {Boolean}
* @api private
*/
Socket.prototype.isXDomain = function () {
var locPort = window.location.port || 80;
return this.options.host !== document.domain || this.options.port != locPort;
};
/**
* Called upon handshake.
*
* @api private
*/
Socket.prototype.onConnect = function(){
this.connected = true;
this.connecting = false;
this.emit('connect');
for (var i in this.namespaces) {
this.of(i).$emit('connect');
}
};
/**
* Called when the transport opens
*
* @api private
*/
Socket.prototype.onOpen = function () {
if (!this.connected) {
this.onConnect();
}
this.open = true;
};
/**
* Called when the transport closes.
*
* @api private
*/
Socket.prototype.onClose = function () {
this.open = false;
};
/**
* Called when the transport first opens a connection
*
* @param text
*/
Socket.prototype.onPacket = function (packet) {
this.of(packet.endpoint).onPacket(packet);
};
/**
* Handles an error.
*
* @api private
*/
Socket.prototype.onError = function (err) {
this.emit('error', err);
for (var i in this.namespaces) {
this.of(i).$emit('error', err);
}
};
/**
* Called when the transport disconnects.
*
* @api private
*/
Socket.prototype.onDisconnect = function (reason) {
var wasConnected = this.connected;
this.connected = false;
this.connecting = false;
this.open = false;
if (wasConnected) {
this.emit('disconnect');
this.transport.clearTimeouts();
for (var i in this.namespaces) {
this.of(i).$emit('disconnect', reason);
}
if (this.options.reconnect && !this.reconnecting) {
this.reconnect();
}
}
};
/**
* Called upon reconnection.
*
* @api private
*/
Socket.prototype.reconnect = function () {
this.reconnecting = true;
this.reconnectionAttempts = 0;
this.reconnectionDelay = this.options['reconnection delay'];
var self = this
, maxAttempts = this.options['max reconnection attempts']
, tryMultiple = this.options['try multiple transports']
function reset () {
if (self.connected) {
self.emit('reconnect', self.transport.name, self.reconnectionAttempts);
}
self.removeListener('connect_failed', maybeReconnect);
self.removeListener('connect', maybeReconnect);
self.reconnecting = false;
delete self.reconnectionAttempts;
delete self.reconnectionDelay;
delete self.reconnectionTimer;
delete self.redoTransports;
self.options['try multiple transports'] = tryMultiple;
};
function maybeReconnect () {
if (!self.reconnecting) {
return;
}
if (self.connected) {
return reset();
};
if (self.connecting && self.reconnecting) {
return self.reconnectionTimer = setTimeout(maybeReconnect, 1000);
}
if (self.reconnectionAttempts++ >= maxAttempts) {
if (!self.redoTransports) {
self.on('connect_failed', maybeReconnect);
self.options['try multiple transports'] = true;
self.transport = self.getTransport();
self.redoTransports = true;
self.connect();
} else {
self.emit('reconnect_failed');
reset();
}
} else {
self.reconnectionDelay *= 2; // exponential back off
self.connect();
self.emit('reconnecting', self.reconnectionDelay, self.reconnectionAttempts);
self.reconnectionTimer = setTimeout(maybeReconnect, self.reconnectionDelay);
}
};
this.options['try multiple transports'] = false;
this.reconnectionTimer = setTimeout(maybeReconnect, this.reconnectionDelay);
this.on('connect', maybeReconnect);
};
})(
'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Expose constructor.
*/
exports.SocketNamespace = SocketNamespace;
/**
* Socket namespace constructor.
*
* @constructor
* @api public
*/
function SocketNamespace (name) {
this.name = name || '';
this.flags = {};
this.json = new Flag(this, 'json');
this.ackPackets = 0;
this.acks = {};
};
/**
* Apply EventEmitter mixin.
*/
io.util.mixin(SocketNamespace, io.EventEmitter);
/**
* Copies emit since we override it
*
* @api private
*/
SocketNamespace.prototype.$emit = io.EventEmitter.prototype.emit;
/**
* Sends a packet.
*
* @api private
*/
SocketNamespace.prototype.packet = function (packet) {
packet.endpoint = this.name;
this.socket.packet(packet);
this.flags = {};
return this;
};
/**
* Sends a message
*
* @api public
*/
SocketNamespace.prototype.send = function (data, fn) {
var packet = {
type: this.flags.json ? 'json' : 'message'
, data: data
};
if ('function' == typeof fn) {
packet.id = ++this.ackPackets;
packet.ack = fn.length ? 'data' : true;
this.acks[packet.id] = fn;
}
return this.packet(packet);
};
/**
* Emits an event
*
* @api public
*/
SocketNamespace.prototype.emit = function (name) {
var args = Array.prototype.slice.call(arguments, 1)
, lastArg = args[args.length - 1]
, packet = {
type: 'event'
, name: name
};
if ('function' == typeof lastArg) {
packet.id = ++this.ackPackets;
packet.ack = lastArg.length ? 'data' : true;
this.acks[packet.id] = lastArg;
args = args.slice(0, args.length - 1);
}
packet.args = args;
return this.packet(packet);
};
/**
* Handles a packet
*
* @api private
*/
SocketNamespace.prototype.onPacket = function (packet) {
switch (packet.type) {
case 'connect':
case 'disconnect':
this.$emit(packet.type);
break;
case 'message':
case 'json':
this.$emit('message', packet.data);
break;
case 'event':
this.$emit.apply(this, [packet.name].concat(packet.args));
break;
}
};
/**
* Flag interface.
*
* @api private
*/
function Flag (nsp, name) {
this.namespace = nsp;
this.name = name;
};
/**
* Send a message
*
* @api public
*/
Flag.prototype.send = function () {
this.namespace.flags[this.name] = true;
this.namespace.send.apply(this, arguments);
};
/**
* Emit an event
*
* @api public
*/
Flag.prototype.emit = function () {
this.namespace.flags[this.name] = true;
this.namespace.emit.apply(this, arguments);
};
})(
'undefined' != typeof io ? io : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Expose constructor.
*/
exports.websocket = WS;
/**
* The WebSocket transport uses the HTML5 WebSocket API to establish an persistent
* connection with the Socket.IO server. This transport will also be inherited by the
* FlashSocket fallback as it provides a API compatible polyfill for the WebSockets.
*
* @constructor
* @extends {io.Transport}
* @api public
*/
function WS (socket) {
io.Transport.apply(this, arguments);
// The transport type, you use this to identify which transport was chosen.
this.name = 'websocket';
};
/**
* Inherits from Transport.
*/
io.util.inherit(WS, io.Transport);
/**
* Initializes a new `WebSocket` connection with the Socket.IO server. We attach
* all the appropriate listeners to handle the responses from the server.
*
* @returns {Transport}
* @api public
*/
WS.prototype.open = function(){
this.websocket = new WebSocket(this.prepareUrl());
var self = this;
this.websocket.onopen = function () { self.onOpen(); };
this.websocket.onmessage = function (ev) { self.onData(ev.data); };
this.websocket.onclose = function () { self.onClose(); };
this.websocket.onerror = function (e) { self.onError(e); };
return this;
};
/**
* Send a message to the Socket.IO server. The message will automatically be encoded
* in the correct message format.
*
* @returns {Transport}
* @api public
*/
WS.prototype.send = function (data) {
this.websocket.send(data);
return this;
};
/**
* Disconnect the established `WebSocket` connection.
*
* @returns {Transport}
* @api public
*/
WS.prototype.close = function(){
this.websocket.close();
return this;
};
/**
* Handle the errors that `WebSocket` might be giving when we
* are attempting to connect or send messages.
*
* @param {Error} e The error.
* @api private
*/
WS.prototype.onError = function(e){
this.socket.onError(e);
};
/**
* Returns the appropriate scheme for the URI generation.
*
* @api private
*/
WS.prototype.scheme = function(){
return (this.socket.options.secure ? 'wss' : 'ws');
};
/**
* Generates a connection url based on the Socket.IO URL Protocol.
* See <https://github.com/learnboost/socket.io-node/> for more details.
*
* @returns {String} Connection url
* @api private
*/
WS.prototype.prepareUrl = function () {
return this.scheme() + '://'
+ this.socket.options.host + ':' + this.socket.options.port + '/'
+ this.socket.options.resource + '/' + io.protocol
+ '/' + this.name + '/' + this.sessid;
};
/**
* Checks if the browser has support for native `WebSockets` and that
* it's not the polyfill created for the FlashSocket transport.
*
* @return {Boolean}
* @api public
*/
WS.check = function(){
return !! window.WebSocket;
};
/**
* Check if the `WebSocket` transport support cross domain communications.
*
* @returns {Boolean}
* @api public
*/
WS.xdomainCheck = function(){
return true;
};
})(
'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Expose constructor.
*
* @api public
*/
exports.XHR = XHR;
/**
* XHR constructor
*
* @costructor
* @api public
*/
function XHR (socket) {
if (!socket) return;
io.Transport.apply(this, arguments);
this.sendBuffer = [];
this.onOpen();
};
/**
* Inherits from Transport.
*/
io.util.inherit(XHR, io.Transport);
/**
* Establish a connection
*
* @returns {Transport}
* @api public
*/
XHR.prototype.open = function () {
this.get();
// we need to make sure the request succeeds since we have no indication
// whether the request opened or not until it succeeded.
this.setCloseTimeout();
return this;
};
/**
* Check if we need to send data to the Socket.IO server, if we have data in our buffer
* we encode it and forward it to the `post` method.
*
* @api private
*/
XHR.prototype.checkSend = function () {
if (!this.posting && this.sendBuffer.length) {
var encoded = io.parser.encodePayload(this.sendBuffer);
this.sendBuffer = [];
this.post(encoded);
}
};
/**
* Send data to the Socket.IO server.
*
* @param data The message
* @returns {Transport}
* @api public
*/
XHR.prototype.send = function (data) {
if (io.util.isArray(data)) {
this.sendBuffer.push.apply(this.sendBuffer, data);
} else {
this.sendBuffer.push(data);
}
this.checkSend();
return this;
};
/**
* Posts a encoded message to the Socket.IO server.
*
* @param {String} data A encoded message.
* @api private
*/
function empty () { };
XHR.prototype.post = function (data) {
var self = this;
this.posting = true;
function stateChange () {
if (self.sendXHR.readyState == 4) {
self.sendXHR.onreadystatechange = self.sendXHR.onload = empty;
self.posting = false;
if (self.sendXHR.status == 200){
self.checkSend();
} else {
self.onClose();
}
}
}
this.sendXHR = this.request('POST');
if (window.XDomainRequest && this.xhr instanceof XDomainRequest) {
this.sendXHR.onload = stateChange;
} else {
this.sendXHR.onreadystatechange = stateChange;
}
this.sendXHR.send(data);
};
/**
* Handle the disconnect request.
*
* @api private
*/
XHR.prototype.onClose = function(){
if (this.xhr){
this.xhr.onreadystatechange = this.xhr.onload = empty;
try {
this.xhr.abort();
} catch(e){}
this.xhr = null;
}
if (this.sendXHR){
this.sendXHR.onreadystatechange = this.sendXHR.onload = empty;
try {
this.sendXHR.abort();
} catch(e){}
this.sendXHR = null;
}
this.sendBuffer = [];
io.Transport.prototype.onClose.call(this);
};
/**
* Generates a configured XHR request
*
* @param {String} url The url that needs to be requested.
* @param {String} method The method the request should use.
* @returns {XMLHttpRequest}
* @api private
*/
XHR.prototype.request = function (method) {
var req = io.util.request(this.socket.isXDomain());
req.open(method || 'GET', this.prepareUrl() + '?t' + (+ new Date));
if (method == 'POST') {
if (req.setRequestHeader) {
req.setRequestHeader('Content-type', 'text/plain');
} else {
// XDomainRequest
req.contentType = 'text/plain';
}
}
return req;
};
/**
* Returns the scheme to use for the transport URLs.
*
* @api private
*/
XHR.prototype.scheme = function () {
return this.socket.options.secure ? 'https://' : 'http://';
};
/**
* Check if the XHR transports are supported
*
* @param {Boolean} xdomain Check if we support cross domain requests.
* @returns {Boolean}
* @api public
*/
XHR.check = function (xdomain) {
try {
if (io.util.request(xdomain)) {
return true;
}
} catch(e) {}
return false;
};
/**
* Check if the XHR transport supports corss domain requests.
*
* @returns {Boolean}
* @api public
*/
XHR.xdomainCheck = function(){
return XHR.check(true);
};
})(
'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Expose constructor.
*/
exports.htmlfile = HTMLFile;
/**
* The HTMLFile transport creates a `forever iframe` based transport
* for Internet Explorer. Regular forever iframe implementations will
* continuously trigger the browsers buzy indicators. If the forever iframe
* is created inside a `htmlfile` these indicators will not be trigged.
*
* @constructor
* @extends {io.Transport.XHR}
* @api public
*/
function HTMLFile (socket) {
io.Transport.XHR.apply(this, arguments);
// The transport type, you use this to identify which transport was chosen.
this.name = 'htmlfile';
};
/**
* Inherits from XHR transport.
*/
io.util.inherit(HTMLFile, io.Transport.XHR);
/**
* Starts the HTMLFile data stream for incoming messages. And registers a
* onunload event listener so the HTMLFile will be destroyed.
*
* @api private
*/
HTMLFile.prototype.get = function () {
var self = this;
this.open();
window.attachEvent('onunload', function () {
self.destroy();
});
};
/**
* Creates a new ActiveX `htmlfile` with a forever loading iframe
* that can be used to listen to messages. Inside the generated
* `htmlfile` a reference will be made to the HTMLFile transport.
*
* @api private
*/
HTMLFile.prototype.open = function () {
this.doc = new ActiveXObject('htmlfile');
this.doc.open();
this.doc.write('<html></html>');
this.doc.parentWindow.s = this;
this.doc.close();
var iframeC = this.doc.createElement('div');
iframeC.className = 'socketio';
this.doc.body.appendChild(iframeC);
this.iframe = this.doc.createElement('iframe');
iframeC.appendChild(this.iframe);
this.iframe.src = this.prepareUrl() + '/?t=' + (+ new Date);
this.onOpen();
};
/**
* The Socket.IO server will write script tags inside the forever
* iframe, this function will be used as callback for the incoming
* information.
*
* @param {String} data The message
* @param {document} doc Reference to the context
* @api private
*/
HTMLFile.prototype._ = function (data, doc) {
this.onData(data);
var script = doc.getElementsByTagName('script')[0];
script.parentNode.removeChild(script);
};
/**
* Destroy the established connection, iframe and `htmlfile`.
* And calls the `CollectGarbage` function of Internet Explorer
* to release the memory.
*
* @api private
*/
HTMLFile.prototype.destroy = function () {
if (this.iframe){
try {
this.iframe.src = 'about:blank';
} catch(e){}
this.doc = null;
CollectGarbage();
}
};
/**
* Disconnects the established connection.
*
* @returns {Transport} Chaining.
* @api public
*/
HTMLFile.prototype.close = function () {
this.destroy();
return io.Transport.XHR.prototype.close.call(this);
};
/**
* Checks if the browser supports this transport. The browser
* must have an `ActiveXObject` implementation.
*
* @return {Boolean}
* @api public
*/
HTMLFile.check = function () {
if ('ActiveXObject' in window){
try {
var a = new ActiveXObject('htmlfile');
return a && io.Transport.XHR.check();
} catch(e){}
}
return false;
};
/**
* Check if cross domain requests are supported.
*
* @returns {Boolean}
* @api public
*/
HTMLFile.xdomainCheck = function () {
// we can probably do handling for sub-domains, we should
// test that it's cross domain but a subdomain here
return false;
};
})(
'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Expose constructor.
*/
exports['xhr-polling'] = XHRPolling;
/**
* The XHR-polling transport uses long polling XHR requests to create a
* "persistent" connection with the server.
*
* @constructor
* @api public
*/
function XHRPolling () {
io.Transport.XHR.apply(this, arguments);
// The transport type, you use this to identify which transport was chosen.
this.name = 'xhr-polling';
};
/**
* Inherits from XHR transport.
*/
io.util.inherit(XHRPolling, io.Transport.XHR);
/**
* Establish a connection, for iPhone and Android this will be done once the page
* is loaded.
*
* @returns {Transport} Chaining.
* @api public
*/
XHRPolling.prototype.open = function () {
var self = this;
io.util.defer(function () {
io.Transport.XHR.prototype.open.call(self);
});
return false;
};
/**
* Starts a XHR request to wait for incoming messages.
*
* @api private
*/
function empty () {};
XHRPolling.prototype.get = function () {
var self = this;
function stateChange () {
if (self.xhr.readyState == 4) {
self.xhr.onreadystatechange = self.xhr.onload = empty;
if (self.xhr.status == 200) {
self.onData(self.xhr.responseText);
self.get();
} else {
self.onClose();
}
}
}
this.xhr = this.request();
if (window.XDomainRequest && this.xhr instanceof XDomainRequest) {
this.xhr.onload = stateChange;
this.xhr.onerror = function (e) { self.onError(e); };
} else {
this.xhr.onreadystatechange = stateChange;
}
this.xhr.send(null);
};
})(
'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
/**
* socket.io
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
(function (exports, io) {
/**
* Expose constructor.
*/
exports['jsonp-polling'] = JSONPPolling;
/**
* The JSONP transport creates an persistent connection by dynamically
* inserting a script tag in the page. This script tag will receive the
* information of the Socket.IO server. When new information is received
* it creates a new script tag for the new data stream.
*
* @constructor
* @extends {io.Transport.xhr-polling}
* @api public
*/
function JSONPPolling (socket) {
if (!socket) return;
io.Transport['xhr-polling'].apply(this, arguments);
// The transport type, you use this to identify which transport was chosen.
this.name = 'jsonp-polling';
this.insertAt = document.getElementsByTagName('script')[0];
this.index = io.j.length;
var self = this;
io.j.push(function (msg) {
self._(msg);
});
};
/**
* Inherits from XHR polling transport.
*/
io.util.inherit(JSONPPolling, io.Transport['xhr-polling']);
/**
* Posts a encoded message to the Socket.IO server using an iframe.
* The iframe is used because script tags can create POST based requests.
* The iframe is positioned outside of the view so the user does not
* notice it's existence.
*
* @param {String} data A encoded message.
* @api private
*/
JSONPPolling.prototype.post = function (data) {
var self = this;
if (!this.form) {
var form = document.createElement('FORM')
, area = document.createElement('TEXTAREA')
, id = this.iframeId = 'socketio_iframe_' + this.index
, iframe;
form.className = 'socketio';
form.style.position = 'absolute';
form.style.top = '-1000px';
form.style.left = '-1000px';
form.target = id;
form.method = 'POST';
form.action = this.prepareUrl() + '?t=' + (+new Date) + '&i=' + this.index;
area.name = 'data';
form.appendChild(area);
this.insertAt.parentNode.insertBefore(form, this.insertAt);
document.body.appendChild(form);
this.form = form;
this.area = area;
}
function complete () {
initIframe();
self.posting = false;
self.checkSend();
};
function initIframe () {
if (self.iframe) {
self.form.removeChild(self.iframe);
}
try {
// ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
iframe = document.createElement('<iframe name="'+ self.iframeId +'">');
} catch (e) {
iframe = document.createElement('iframe');
iframe.name = self.iframeId;
}
iframe.id = self.iframeId;
self.form.appendChild(iframe);
self.iframe = iframe;
};
initIframe();
this.posting = true;
this.area.value = data;
try {
this.form.submit();
} catch(e) {}
if (this.iframe.attachEvent) {
iframe.onreadystatechange = function () {
if (self.iframe.readyState == 'complete') {
complete();
}
};
} else {
this.iframe.onload = complete;
}
};
/**
* Creates a new JSONP poll that can be used to listen
* for messages from the Socket.IO server.
*
* @api private
*/
JSONPPolling.prototype.get = function () {
var self = this
, script = document.createElement('SCRIPT');
if (this.script) {
this.script.parentNode.removeChild(this.script);
this.script = null;
}
script.async = true;
script.src = this.prepareUrl() + '/?t=' + (+new Date) + '&i=' + this.index;
script.onerror = function(){
self.onClose();
};
this.insertAt.parentNode.insertBefore(script, this.insertAt);
this.script = script;
};
/**
* Callback function for the incoming message stream from the Socket.IO server.
*
* @param {String} data The message
* @api private
*/
JSONPPolling.prototype._ = function (msg) {
this.onData(msg);
this.get();
return this;
};
/**
* Checks if browser supports this transport.
*
* @return {Boolean}
* @api public
*/
JSONPPolling.check = function () {
return true;
};
/**
* Check if cross domain requests are supported
*
* @returns {Boolean}
* @api public
*/
JSONPPolling.xdomainCheck = function () {
return true;
};
})(
'undefined' != typeof io ? io.Transport : module.exports
, 'undefined' != typeof io ? io : module.parent.exports
);
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