cloudboost-tv
Version:
Database Service that does Storage, Search, Real-time and a whole lot more.
1,302 lines (1,093 loc) • 334 kB
JavaScript
if (!CB._isNode) {
//Socket.io Client library
(function(f) {
if (typeof exports === "object" && typeof module !== "undefined") {
module.exports = f()
} else if (typeof define === "function" && define.amd) {
define([], f)
} else {
var g;
if (typeof window !== "undefined") {
g = window
} else if (typeof global !== "undefined") {
g = global
} else if (typeof self !== "undefined") {
g = self
} else {
g = this
}
g.io = f()
}
})(function() {
var define,
module,
exports;
return (function e(t, n, r) {
function s(o, u) {
if (!n[o]) {
if (!t[o]) {
var a = typeof require == "function" && require;
if (!u && a)
return a(o, !0);
if (i)
return i(o, !0);
var f = new Error("Cannot find module '" + o + "'");
throw f.code = "MODULE_NOT_FOUND",
f
}
var l = n[o] = {
exports: {}
};
t[o][0].call(l.exports, function(e) {
var n = t[o][1][e];
return s(n
? n
: e)
}, l, l.exports, e, t, n, r)
}
return n[o].exports
}
var i = typeof require == "function" && require;
for (var o = 0; o < r.length; o++)
s(r[o]);
return s
})(
{
1: [
function(_dereq_, module, exports) {
module.exports = _dereq_('./lib/');
}, {
"./lib/": 2
}
],
2: [
function(_dereq_, module, exports) {
module.exports = _dereq_('./socket');
/**
* Exports parser
*
* @api public
*
*/
module.exports.parser = _dereq_('engine.io-parser');
}, {
"./socket": 3,
"engine.io-parser": 19
}
],
3: [
function(_dereq_, module, exports) {
(function(global) {
/**
* Module dependencies.
*/
var transports = _dereq_('./transports');
var Emitter = _dereq_('component-emitter');
var debug = _dereq_('debug')('engine.io-client:socket');
var index = _dereq_('indexof');
var parser = _dereq_('engine.io-parser');
var parseuri = _dereq_('parseuri');
var parsejson = _dereq_('parsejson');
var parseqs = _dereq_('parseqs');
/**
* Module exports.
*/
module.exports = Socket;
/**
* Noop function.
*
* @api private
*/
function noop() {}
/**
* Socket constructor.
*
* @param {String|Object} uri or options
* @param {Object} options
* @api public
*/
function Socket(uri, opts) {
if (!(this instanceof Socket))
return new Socket(uri, opts);
opts = opts || {};
if (uri && 'object' == typeof uri) {
opts = uri;
uri = null;
}
if (uri) {
uri = parseuri(uri);
opts.hostname = uri.host;
opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
opts.port = uri.port;
if (uri.query)
opts.query = uri.query;
}
else if (opts.host) {
opts.hostname = parseuri(opts.host).host;
}
this.secure = null != opts.secure
? opts.secure
: (global.location && 'https:' == location.protocol);
if (opts.hostname && !opts.port) {
// if no port is specified manually, use the protocol default
opts.port = this.secure
? '443'
: '80';
}
this.agent = opts.agent || false;
this.hostname = opts.hostname || (global.location
? location.hostname
: 'localhost');
this.port = opts.port || (global.location && location.port
? location.port
: (this.secure
? 443
: 80));
this.query = opts.query || {};
if ('string' == typeof this.query)
this.query = parseqs.decode(this.query);
this.upgrade = false !== opts.upgrade;
this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
this.forceJSONP = !!opts.forceJSONP;
this.jsonp = false !== opts.jsonp;
this.forceBase64 = !!opts.forceBase64;
this.enablesXDR = !!opts.enablesXDR;
this.timestampParam = opts.timestampParam || 't';
this.timestampRequests = opts.timestampRequests;
this.transports = opts.transports || ['polling', 'websocket'];
this.readyState = '';
this.writeBuffer = [];
this.policyPort = opts.policyPort || 843;
this.rememberUpgrade = opts.rememberUpgrade || false;
this.binaryType = null;
this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
this.perMessageDeflate = false !== opts.perMessageDeflate
? (opts.perMessageDeflate || {})
: false;
if (true === this.perMessageDeflate)
this.perMessageDeflate = {};
if (this.perMessageDeflate && null == this.perMessageDeflate.threshold) {
this.perMessageDeflate.threshold = 1024;
}
// SSL options for Node.js client
this.pfx = opts.pfx || null;
this.key = opts.key || null;
this.passphrase = opts.passphrase || null;
this.cert = opts.cert || null;
this.ca = opts.ca || null;
this.ciphers = opts.ciphers || null;
this.rejectUnauthorized = opts.rejectUnauthorized === undefined
? null
: opts.rejectUnauthorized;
// other options for Node.js client
var freeGlobal = typeof global == 'object' && global;
if (freeGlobal.global === freeGlobal) {
if (opts.extraHeaders && Object.keys(opts.extraHeaders).length > 0) {
this.extraHeaders = opts.extraHeaders;
}
}
this.open();
}
Socket.priorWebsocketSuccess = false;
/**
* Mix in `Emitter`.
*/
Emitter(Socket.prototype);
/**
* Protocol version.
*
* @api public
*/
Socket.protocol = parser.protocol; // this is an int
/**
* Expose deps for legacy compatibility
* and standalone browser access.
*/
Socket.Socket = Socket;
Socket.Transport = _dereq_('./transport');
Socket.transports = _dereq_('./transports');
Socket.parser = _dereq_('engine.io-parser');
/**
* Creates transport of the given type.
*
* @param {String} transport name
* @return {Transport}
* @api private
*/
Socket.prototype.createTransport = function(name) {
debug('creating transport "%s"', name);
var query = clone(this.query);
// append engine.io protocol identifier
query.EIO = parser.protocol;
// transport name
query.transport = name;
// session id if we already have one
if (this.id)
query.sid = this.id;
var transport = new transports[name]({
agent: this.agent,
hostname: this.hostname,
port: this.port,
secure: this.secure,
path: this.path,
query: query,
forceJSONP: this.forceJSONP,
jsonp: this.jsonp,
forceBase64: this.forceBase64,
enablesXDR: this.enablesXDR,
timestampRequests: this.timestampRequests,
timestampParam: this.timestampParam,
policyPort: this.policyPort,
socket: this,
pfx: this.pfx,
key: this.key,
passphrase: this.passphrase,
cert: this.cert,
ca: this.ca,
ciphers: this.ciphers,
rejectUnauthorized: this.rejectUnauthorized,
perMessageDeflate: this.perMessageDeflate,
extraHeaders: this.extraHeaders
});
return transport;
};
function clone(obj) {
var o = {};
for (var i in obj) {
if (obj.hasOwnProperty(i)) {
o[i] = obj[i];
}
}
return o;
}
/**
* Initializes transport to use and starts probe.
*
* @api private
*/
Socket.prototype.open = function() {
var transport;
if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
transport = 'websocket';
} else if (0 === this.transports.length) {
// Emit error on next tick so it can be listened to
var self = this;
setTimeout(function() {
self.emit('error', 'No transports available');
}, 0);
return;
} else {
transport = this.transports[0];
}
this.readyState = 'opening';
// Retry with the next transport if the transport is disabled (jsonp: false)
try {
transport = this.createTransport(transport);
} catch (e) {
this.transports.shift();
this.open();
return;
}
transport.open();
this.setTransport(transport);
};
/**
* Sets the current transport. Disables the existing one (if any).
*
* @api private
*/
Socket.prototype.setTransport = function(transport) {
debug('setting transport %s', transport.name);
var self = this;
if (this.transport) {
debug('clearing existing transport %s', this.transport.name);
this.transport.removeAllListeners();
}
// set up transport
this.transport = transport;
// set up transport listeners
transport.on('drain', function() {
self.onDrain();
}).on('packet', function(packet) {
self.onPacket(packet);
}).on('error', function(e) {
self.onError(e);
}).on('close', function() {
self.onClose('transport close');
});
};
/**
* Probes a transport.
*
* @param {String} transport name
* @api private
*/
Socket.prototype.probe = function(name) {
debug('probing transport "%s"', name);
var transport = this.createTransport(name, {probe: 1}),
failed = false,
self = this;
Socket.priorWebsocketSuccess = false;
function onTransportOpen() {
if (self.onlyBinaryUpgrades) {
var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
failed = failed || upgradeLosesBinary;
}
if (failed)
return;
debug('probe transport "%s" opened', name);
transport.send([
{
type: 'ping',
data: 'probe'
}
]);
transport.once('packet', function(msg) {
if (failed)
return;
if ('pong' == msg.type && 'probe' == msg.data) {
debug('probe transport "%s" pong', name);
self.upgrading = true;
self.emit('upgrading', transport);
if (!transport)
return;
Socket.priorWebsocketSuccess = 'websocket' == transport.name;
debug('pausing current transport "%s"', self.transport.name);
self.transport.pause(function() {
if (failed)
return;
if ('closed' == self.readyState)
return;
debug('changing transport and sending upgrade packet');
cleanup();
self.setTransport(transport);
transport.send([
{
type: 'upgrade'
}
]);
self.emit('upgrade', transport);
transport = null;
self.upgrading = false;
self.flush();
});
} else {
debug('probe transport "%s" failed', name);
var err = new Error('probe error');
err.transport = transport.name;
self.emit('upgradeError', err);
}
});
}
function freezeTransport() {
if (failed)
return;
// Any callback called by transport should be ignored since now
failed = true;
cleanup();
transport.close();
transport = null;
}
//Handle any error that happens while probing
function onerror(err) {
var error = new Error('probe error: ' + err);
error.transport = transport.name;
freezeTransport();
debug('probe transport "%s" failed because of error: %s', name, err);
self.emit('upgradeError', error);
}
function onTransportClose() {
onerror("transport closed");
}
//When the socket is closed while we're probing
function onclose() {
onerror("socket closed");
}
//When the socket is upgraded while we're probing
function onupgrade(to) {
if (transport && to.name != transport.name) {
debug('"%s" works - aborting "%s"', to.name, transport.name);
freezeTransport();
}
}
//Remove all listeners on the transport and on self
function cleanup() {
transport.removeListener('open', onTransportOpen);
transport.removeListener('error', onerror);
transport.removeListener('close', onTransportClose);
self.removeListener('close', onclose);
self.removeListener('upgrading', onupgrade);
}
transport.once('open', onTransportOpen);
transport.once('error', onerror);
transport.once('close', onTransportClose);
this.once('close', onclose);
this.once('upgrading', onupgrade);
transport.open();
};
/**
* Called when connection is deemed open.
*
* @api public
*/
Socket.prototype.onOpen = function() {
debug('socket open');
this.readyState = 'open';
Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
this.emit('open');
this.flush();
// we check for `readyState` in case an `open`
// listener already closed the socket
if ('open' == this.readyState && this.upgrade && this.transport.pause) {
debug('starting upgrade probes');
for (var i = 0, l = this.upgrades.length; i < l; i++) {
this.probe(this.upgrades[i]);
}
}
};
/**
* Handles a packet.
*
* @api private
*/
Socket.prototype.onPacket = function(packet) {
if ('opening' == this.readyState || 'open' == this.readyState) {
debug('socket receive: type "%s", data "%s"', packet.type, packet.data);
this.emit('packet', packet);
// Socket is live - any packet counts
this.emit('heartbeat');
switch (packet.type) {
case 'open':
this.onHandshake(parsejson(packet.data));
break;
case 'pong':
this.setPing();
this.emit('pong');
break;
case 'error':
var err = new Error('server error');
err.code = packet.data;
this.onError(err);
break;
case 'message':
this.emit('data', packet.data);
this.emit('message', packet.data);
break;
}
} else {
debug('packet received with socket readyState "%s"', this.readyState);
}
};
/**
* Called upon handshake completion.
*
* @param {Object} handshake obj
* @api private
*/
Socket.prototype.onHandshake = function(data) {
this.emit('handshake', data);
this.id = data.sid;
this.transport.query.sid = data.sid;
this.upgrades = this.filterUpgrades(data.upgrades);
this.pingInterval = data.pingInterval;
this.pingTimeout = data.pingTimeout;
this.onOpen();
// In case open handler closes socket
if ('closed' == this.readyState)
return;
this.setPing();
// Prolong liveness of socket on heartbeat
this.removeListener('heartbeat', this.onHeartbeat);
this.on('heartbeat', this.onHeartbeat);
};
/**
* Resets ping timeout.
*
* @api private
*/
Socket.prototype.onHeartbeat = function(timeout) {
clearTimeout(this.pingTimeoutTimer);
var self = this;
self.pingTimeoutTimer = setTimeout(function() {
if ('closed' == self.readyState)
return;
self.onClose('ping timeout');
}, timeout || (self.pingInterval + self.pingTimeout));
};
/**
* Pings server every `this.pingInterval` and expects response
* within `this.pingTimeout` or closes connection.
*
* @api private
*/
Socket.prototype.setPing = function() {
var self = this;
clearTimeout(self.pingIntervalTimer);
self.pingIntervalTimer = setTimeout(function() {
debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
self.ping();
self.onHeartbeat(self.pingTimeout);
}, self.pingInterval);
};
/**
* Sends a ping packet.
*
* @api private
*/
Socket.prototype.ping = function() {
var self = this;
this.sendPacket('ping', function() {
self.emit('ping');
});
};
/**
* Called on `drain` event
*
* @api private
*/
Socket.prototype.onDrain = function() {
this.writeBuffer.splice(0, this.prevBufferLen);
// setting prevBufferLen = 0 is very important
// for example, when upgrading, upgrade packet is sent over,
// and a nonzero prevBufferLen could cause problems on `drain`
this.prevBufferLen = 0;
if (0 === this.writeBuffer.length) {
this.emit('drain');
} else {
this.flush();
}
};
/**
* Flush write buffers.
*
* @api private
*/
Socket.prototype.flush = function() {
if ('closed' != this.readyState && this.transport.writable && !this.upgrading && this.writeBuffer.length) {
debug('flushing %d packets in socket', this.writeBuffer.length);
this.transport.send(this.writeBuffer);
// keep track of current length of writeBuffer
// splice writeBuffer and callbackBuffer on `drain`
this.prevBufferLen = this.writeBuffer.length;
this.emit('flush');
}
};
/**
* Sends a message.
*
* @param {String} message.
* @param {Function} callback function.
* @param {Object} options.
* @return {Socket} for chaining.
* @api public
*/
Socket.prototype.write = Socket.prototype.send = function(msg, options, fn) {
this.sendPacket('message', msg, options, fn);
return this;
};
/**
* Sends a packet.
*
* @param {String} packet type.
* @param {String} data.
* @param {Object} options.
* @param {Function} callback function.
* @api private
*/
Socket.prototype.sendPacket = function(type, data, options, fn) {
if ('function' == typeof data) {
fn = data;
data = undefined;
}
if ('function' == typeof options) {
fn = options;
options = null;
}
if ('closing' == this.readyState || 'closed' == this.readyState) {
return;
}
options = options || {};
options.compress = false !== options.compress;
var packet = {
type: type,
data: data,
options: options
};
this.emit('packetCreate', packet);
this.writeBuffer.push(packet);
if (fn)
this.once('flush', fn);
this.flush();
};
/**
* Closes the connection.
*
* @api private
*/
Socket.prototype.close = function() {
if ('opening' == this.readyState || 'open' == this.readyState) {
this.readyState = 'closing';
var self = this;
if (this.writeBuffer.length) {
this.once('drain', function() {
if (this.upgrading) {
waitForUpgrade();
} else {
close();
}
});
} else if (this.upgrading) {
waitForUpgrade();
} else {
close();
}
}
function close() {
self.onClose('forced close');
debug('socket closing - telling transport to close');
self.transport.close();
}
function cleanupAndClose() {
self.removeListener('upgrade', cleanupAndClose);
self.removeListener('upgradeError', cleanupAndClose);
close();
}
function waitForUpgrade() {
// wait for upgrade to finish since we can't send packets while pausing a transport
self.once('upgrade', cleanupAndClose);
self.once('upgradeError', cleanupAndClose);
}
return this;
};
/**
* Called upon transport error
*
* @api private
*/
Socket.prototype.onError = function(err) {
debug('socket error %j', err);
Socket.priorWebsocketSuccess = false;
this.emit('error', err);
this.onClose('transport error', err);
};
/**
* Called upon transport close.
*
* @api private
*/
Socket.prototype.onClose = function(reason, desc) {
if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
debug('socket close with reason: "%s"', reason);
var self = this;
// clear timers
clearTimeout(this.pingIntervalTimer);
clearTimeout(this.pingTimeoutTimer);
// stop event from firing again for transport
this.transport.removeAllListeners('close');
// ensure transport won't stay open
this.transport.close();
// ignore further transport communication
this.transport.removeAllListeners();
// set ready state
this.readyState = 'closed';
// clear session id
this.id = null;
// emit close event
this.emit('close', reason, desc);
// clean buffers after, so users can still
// grab the buffers on `close` event
self.writeBuffer = [];
self.prevBufferLen = 0;
}
};
/**
* Filters upgrades, returning only those matching client transports.
*
* @param {Array} server upgrades
* @api private
*
*/
Socket.prototype.filterUpgrades = function(upgrades) {
var filteredUpgrades = [];
for (var i = 0, j = upgrades.length; i < j; i++) {
if (~ index(this.transports, upgrades[i]))
filteredUpgrades.push(upgrades[i]);
}
return filteredUpgrades;
};
}).call(this, typeof self !== "undefined"
? self
: typeof window !== "undefined"
? window
: typeof global !== "undefined"
? global
: {})
}, {
"./transport": 4,
"./transports": 5,
"component-emitter": 15,
"debug": 17,
"engine.io-parser": 19,
"indexof": 23,
"parsejson": 26,
"parseqs": 27,
"parseuri": 28
}
],
4: [
function(_dereq_, module, exports) {
/**
* Module dependencies.
*/
var parser = _dereq_('engine.io-parser');
var Emitter = _dereq_('component-emitter');
/**
* Module exports.
*/
module.exports = Transport;
/**
* Transport abstract constructor.
*
* @param {Object} options.
* @api private
*/
function Transport(opts) {
this.path = opts.path;
this.hostname = opts.hostname;
this.port = opts.port;
this.secure = opts.secure;
this.query = opts.query;
this.timestampParam = opts.timestampParam;
this.timestampRequests = opts.timestampRequests;
this.readyState = '';
this.agent = opts.agent || false;
this.socket = opts.socket;
this.enablesXDR = opts.enablesXDR;
// SSL options for Node.js client
this.pfx = opts.pfx;
this.key = opts.key;
this.passphrase = opts.passphrase;
this.cert = opts.cert;
this.ca = opts.ca;
this.ciphers = opts.ciphers;
this.rejectUnauthorized = opts.rejectUnauthorized;
// other options for Node.js client
this.extraHeaders = opts.extraHeaders;
}
/**
* Mix in `Emitter`.
*/
Emitter(Transport.prototype);
/**
* Emits an error.
*
* @param {String} str
* @return {Transport} for chaining
* @api public
*/
Transport.prototype.onError = function(msg, desc) {
var err = new Error(msg);
err.type = 'TransportError';
err.description = desc;
this.emit('error', err);
return this;
};
/**
* Opens the transport.
*
* @api public
*/
Transport.prototype.open = function() {
if ('closed' == this.readyState || '' == this.readyState) {
this.readyState = 'opening';
this.doOpen();
}
return this;
};
/**
* Closes the transport.
*
* @api private
*/
Transport.prototype.close = function() {
if ('opening' == this.readyState || 'open' == this.readyState) {
this.doClose();
this.onClose();
}
return this;
};
/**
* Sends multiple packets.
*
* @param {Array} packets
* @api private
*/
Transport.prototype.send = function(packets) {
if ('open' == this.readyState) {
this.write(packets);
} else {
throw new Error('Transport not open');
}
};
/**
* Called upon open
*
* @api private
*/
Transport.prototype.onOpen = function() {
this.readyState = 'open';
this.writable = true;
this.emit('open');
};
/**
* Called with data.
*
* @param {String} data
* @api private
*/
Transport.prototype.onData = function(data) {
var packet = parser.decodePacket(data, this.socket.binaryType);
this.onPacket(packet);
};
/**
* Called with a decoded packet.
*/
Transport.prototype.onPacket = function(packet) {
this.emit('packet', packet);
};
/**
* Called upon close.
*
* @api private
*/
Transport.prototype.onClose = function() {
this.readyState = 'closed';
this.emit('close');
};
}, {
"component-emitter": 15,
"engine.io-parser": 19
}
],
5: [
function(_dereq_, module, exports) {
(function(global) {
/**
* Module dependencies
*/
var XMLHttpRequest = _dereq_('xmlhttprequest-ssl');
var XHR = _dereq_('./polling-xhr');
var JSONP = _dereq_('./polling-jsonp');
var websocket = _dereq_('./websocket');
/**
* Export transports.
*/
exports.polling = polling;
exports.websocket = websocket;
/**
* Polling transport polymorphic constructor.
* Decides on xhr vs jsonp based on feature detection.
*
* @api private
*/
function polling(opts) {
var xhr;
var xd = false;
var xs = false;
var jsonp = false !== opts.jsonp;
if (global.location) {
var isSSL = 'https:' == location.protocol;
var port = location.port;
// some user agents have empty `location.port`
if (!port) {
port = isSSL
? 443
: 80;
}
xd = opts.hostname != location.hostname || port != opts.port;
xs = opts.secure != isSSL;
}
opts.xdomain = xd;
opts.xscheme = xs;
xhr = new XMLHttpRequest(opts);
if ('open' in xhr && !opts.forceJSONP) {
return new XHR(opts);
} else {
if (!jsonp)
throw new Error('JSONP disabled');
return new JSONP(opts);
}
}
}).call(this, typeof self !== "undefined"
? self
: typeof window !== "undefined"
? window
: typeof global !== "undefined"
? global
: {})
}, {
"./polling-jsonp": 6,
"./polling-xhr": 7,
"./websocket": 9,
"xmlhttprequest-ssl": 10
}
],
6: [
function(_dereq_, module, exports) {
(function(global) {
/**
* Module requirements.
*/
var Polling = _dereq_('./polling');
var inherit = _dereq_('component-inherit');
/**
* Module exports.
*/
module.exports = JSONPPolling;
/**
* Cached regular expressions.
*/
var rNewline = /\n/g;
var rEscapedNewline = /\\n/g;
/**
* Global JSONP callbacks.
*/
var callbacks;
/**
* Callbacks count.
*/
var index = 0;
/**
* Noop.
*/
function empty() {}
/**
* JSONP Polling constructor.
*
* @param {Object} opts.
* @api public
*/
function JSONPPolling(opts) {
Polling.call(this, opts);
this.query = this.query || {};
// define global callbacks array if not present
// we do this here (lazily) to avoid unneeded global pollution
if (!callbacks) {
// we need to consider multiple engines in the same page
if (!global.___eio)
global.___eio = [];
callbacks = global.___eio;
}
// callback identifier
this.index = callbacks.length;
// add callback to jsonp global
var self = this;
callbacks.push(function(msg) {
self.onData(msg);
});
// append to query string
this.query.j = this.index;
// prevent spurious errors from being emitted when the window is unloaded
if (global.document && global.addEventListener) {
global.addEventListener('beforeunload', function() {
if (self.script)
self.script.onerror = empty;
}
, false);
}
}
/**
* Inherits from Polling.
*/
inherit(JSONPPolling, Polling);
/*
* JSONP only supports binary as base64 encoded strings
*/
JSONPPolling.prototype.supportsBinary = false;
/**
* Closes the socket.
*
* @api private
*/
JSONPPolling.prototype.doClose = function() {
if (this.script) {
this.script.parentNode.removeChild(this.script);
this.script = null;
}
if (this.form) {
this.form.parentNode.removeChild(this.form);
this.form = null;
this.iframe = null;
}
Polling.prototype.doClose.call(this);
};
/**
* Starts a poll cycle.
*
* @api private
*/
JSONPPolling.prototype.doPoll = function() {
var self = this;
var script = document.createElement('script');
if (this.script) {
this.script.parentNode.removeChild(this.script);
this.script = null;
}
script.async = true;
script.src = this.uri();
script.onerror = function(e) {
self.onError('jsonp poll error', e);
};
var insertAt = document.getElementsByTagName('script')[0];
if (insertAt) {
insertAt.parentNode.insertBefore(script, insertAt);
} else {
(document.head || document.body).appendChild(script);
}
this.script = script;
var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);
if (isUAgecko) {
setTimeout(function() {
var iframe = document.createElement('iframe');
document.body.appendChild(iframe);
document.body.removeChild(iframe);
}, 100);
}
};
/**
* Writes with a hidden iframe.
*
* @param {String} data to send
* @param {Function} called upon flush.
* @api private
*/
JSONPPolling.prototype.doWrite = function(data, fn) {
var self = this;
if (!this.form) {
var form = document.createElement('form');
var area = document.createElement('textarea');
var id = this.iframeId = 'eio_iframe_' + this.index;
var iframe;
form.className = 'socketio';
form.style.position = 'absolute';
form.style.top = '-1000px';
form.style.left = '-1000px';
form.target = id;
form.method = 'POST';
form.setAttribute('accept-charset', 'utf-8');
area.name = 'd';
form.appendChild(area);
document.body.appendChild(form);
this.form = form;
this.area = area;
}
this.form.action = this.uri();
function complete() {
initIframe();
fn();
}
function initIframe() {
if (self.iframe) {
try {
self.form.removeChild(self.iframe);
} catch (e) {