diff options
Diffstat (limited to 'node_modules/engine.io-client/lib/transports')
5 files changed, 1228 insertions, 0 deletions
diff --git a/node_modules/engine.io-client/lib/transports/index.js b/node_modules/engine.io-client/lib/transports/index.js new file mode 100644 index 0000000..df68fb9 --- /dev/null +++ b/node_modules/engine.io-client/lib/transports/index.js @@ -0,0 +1,53 @@ +/** + * Module dependencies + */ + +var XMLHttpRequest = require('xmlhttprequest-ssl'); +var XHR = require('./polling-xhr'); +var JSONP = require('./polling-jsonp'); +var websocket = require('./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); + } +} diff --git a/node_modules/engine.io-client/lib/transports/polling-jsonp.js b/node_modules/engine.io-client/lib/transports/polling-jsonp.js new file mode 100644 index 0000000..8ba4833 --- /dev/null +++ b/node_modules/engine.io-client/lib/transports/polling-jsonp.js @@ -0,0 +1,231 @@ + +/** + * Module requirements. + */ + +var Polling = require('./polling'); +var inherit = require('component-inherit'); + +/** + * Module exports. + */ + +module.exports = JSONPPolling; + +/** + * Cached regular expressions. + */ + +var rNewline = /\n/g; +var rEscapedNewline = /\\n/g; + +/** + * Global JSONP callbacks. + */ + +var callbacks; + +/** + * 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) { + self.onError('jsonp polling iframe removal error', e); + } + } + + try { + // ie6 dynamic iframes with target="" support (thanks Chris Lambacher) + var html = '<iframe src="javascript:0" name="' + self.iframeId + '">'; + iframe = document.createElement(html); + } catch (e) { + iframe = document.createElement('iframe'); + iframe.name = self.iframeId; + iframe.src = 'javascript:0'; + } + + iframe.id = self.iframeId; + + self.form.appendChild(iframe); + self.iframe = iframe; + } + + initIframe(); + + // escape \n to prevent it from being converted into \r\n by some UAs + // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side + data = data.replace(rEscapedNewline, '\\\n'); + this.area.value = data.replace(rNewline, '\\n'); + + try { + this.form.submit(); + } catch (e) {} + + if (this.iframe.attachEvent) { + this.iframe.onreadystatechange = function () { + if (self.iframe.readyState === 'complete') { + complete(); + } + }; + } else { + this.iframe.onload = complete; + } +}; diff --git a/node_modules/engine.io-client/lib/transports/polling-xhr.js b/node_modules/engine.io-client/lib/transports/polling-xhr.js new file mode 100644 index 0000000..297bac5 --- /dev/null +++ b/node_modules/engine.io-client/lib/transports/polling-xhr.js @@ -0,0 +1,413 @@ +/** + * Module requirements. + */ + +var XMLHttpRequest = require('xmlhttprequest-ssl'); +var Polling = require('./polling'); +var Emitter = require('component-emitter'); +var inherit = require('component-inherit'); +var debug = require('debug')('engine.io-client:polling-xhr'); + +/** + * Module exports. + */ + +module.exports = XHR; +module.exports.Request = Request; + +/** + * Empty function + */ + +function empty () {} + +/** + * XHR Polling constructor. + * + * @param {Object} opts + * @api public + */ + +function XHR (opts) { + Polling.call(this, opts); + this.requestTimeout = opts.requestTimeout; + this.extraHeaders = opts.extraHeaders; + + 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; + } + + this.xd = opts.hostname !== global.location.hostname || + port !== opts.port; + this.xs = opts.secure !== isSSL; + } +} + +/** + * Inherits from Polling. + */ + +inherit(XHR, Polling); + +/** + * XHR supports binary + */ + +XHR.prototype.supportsBinary = true; + +/** + * Creates a request. + * + * @param {String} method + * @api private + */ + +XHR.prototype.request = function (opts) { + opts = opts || {}; + opts.uri = this.uri(); + opts.xd = this.xd; + opts.xs = this.xs; + opts.agent = this.agent || false; + opts.supportsBinary = this.supportsBinary; + opts.enablesXDR = this.enablesXDR; + + // SSL options for Node.js client + opts.pfx = this.pfx; + opts.key = this.key; + opts.passphrase = this.passphrase; + opts.cert = this.cert; + opts.ca = this.ca; + opts.ciphers = this.ciphers; + opts.rejectUnauthorized = this.rejectUnauthorized; + opts.requestTimeout = this.requestTimeout; + + // other options for Node.js client + opts.extraHeaders = this.extraHeaders; + + return new Request(opts); +}; + +/** + * Sends data. + * + * @param {String} data to send. + * @param {Function} called upon flush. + * @api private + */ + +XHR.prototype.doWrite = function (data, fn) { + var isBinary = typeof data !== 'string' && data !== undefined; + var req = this.request({ method: 'POST', data: data, isBinary: isBinary }); + var self = this; + req.on('success', fn); + req.on('error', function (err) { + self.onError('xhr post error', err); + }); + this.sendXhr = req; +}; + +/** + * Starts a poll cycle. + * + * @api private + */ + +XHR.prototype.doPoll = function () { + debug('xhr poll'); + var req = this.request(); + var self = this; + req.on('data', function (data) { + self.onData(data); + }); + req.on('error', function (err) { + self.onError('xhr poll error', err); + }); + this.pollXhr = req; +}; + +/** + * Request constructor + * + * @param {Object} options + * @api public + */ + +function Request (opts) { + this.method = opts.method || 'GET'; + this.uri = opts.uri; + this.xd = !!opts.xd; + this.xs = !!opts.xs; + this.async = false !== opts.async; + this.data = undefined !== opts.data ? opts.data : null; + this.agent = opts.agent; + this.isBinary = opts.isBinary; + this.supportsBinary = opts.supportsBinary; + this.enablesXDR = opts.enablesXDR; + this.requestTimeout = opts.requestTimeout; + + // 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; + + this.create(); +} + +/** + * Mix in `Emitter`. + */ + +Emitter(Request.prototype); + +/** + * Creates the XHR object and sends the request. + * + * @api private + */ + +Request.prototype.create = function () { + var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR }; + + // SSL options for Node.js client + opts.pfx = this.pfx; + opts.key = this.key; + opts.passphrase = this.passphrase; + opts.cert = this.cert; + opts.ca = this.ca; + opts.ciphers = this.ciphers; + opts.rejectUnauthorized = this.rejectUnauthorized; + + var xhr = this.xhr = new XMLHttpRequest(opts); + var self = this; + + try { + debug('xhr open %s: %s', this.method, this.uri); + xhr.open(this.method, this.uri, this.async); + try { + if (this.extraHeaders) { + xhr.setDisableHeaderCheck && xhr.setDisableHeaderCheck(true); + for (var i in this.extraHeaders) { + if (this.extraHeaders.hasOwnProperty(i)) { + xhr.setRequestHeader(i, this.extraHeaders[i]); + } + } + } + } catch (e) {} + + if ('POST' === this.method) { + try { + if (this.isBinary) { + xhr.setRequestHeader('Content-type', 'application/octet-stream'); + } else { + xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8'); + } + } catch (e) {} + } + + try { + xhr.setRequestHeader('Accept', '*/*'); + } catch (e) {} + + // ie6 check + if ('withCredentials' in xhr) { + xhr.withCredentials = true; + } + + if (this.requestTimeout) { + xhr.timeout = this.requestTimeout; + } + + if (this.hasXDR()) { + xhr.onload = function () { + self.onLoad(); + }; + xhr.onerror = function () { + self.onError(xhr.responseText); + }; + } else { + xhr.onreadystatechange = function () { + if (xhr.readyState === 2) { + var contentType; + try { + contentType = xhr.getResponseHeader('Content-Type'); + } catch (e) {} + if (contentType === 'application/octet-stream') { + xhr.responseType = 'arraybuffer'; + } + } + if (4 !== xhr.readyState) return; + if (200 === xhr.status || 1223 === xhr.status) { + self.onLoad(); + } else { + // make sure the `error` event handler that's user-set + // does not throw in the same tick and gets caught here + setTimeout(function () { + self.onError(xhr.status); + }, 0); + } + }; + } + + debug('xhr data %s', this.data); + xhr.send(this.data); + } catch (e) { + // Need to defer since .create() is called directly fhrom the constructor + // and thus the 'error' event can only be only bound *after* this exception + // occurs. Therefore, also, we cannot throw here at all. + setTimeout(function () { + self.onError(e); + }, 0); + return; + } + + if (global.document) { + this.index = Request.requestsCount++; + Request.requests[this.index] = this; + } +}; + +/** + * Called upon successful response. + * + * @api private + */ + +Request.prototype.onSuccess = function () { + this.emit('success'); + this.cleanup(); +}; + +/** + * Called if we have data. + * + * @api private + */ + +Request.prototype.onData = function (data) { + this.emit('data', data); + this.onSuccess(); +}; + +/** + * Called upon error. + * + * @api private + */ + +Request.prototype.onError = function (err) { + this.emit('error', err); + this.cleanup(true); +}; + +/** + * Cleans up house. + * + * @api private + */ + +Request.prototype.cleanup = function (fromError) { + if ('undefined' === typeof this.xhr || null === this.xhr) { + return; + } + // xmlhttprequest + if (this.hasXDR()) { + this.xhr.onload = this.xhr.onerror = empty; + } else { + this.xhr.onreadystatechange = empty; + } + + if (fromError) { + try { + this.xhr.abort(); + } catch (e) {} + } + + if (global.document) { + delete Request.requests[this.index]; + } + + this.xhr = null; +}; + +/** + * Called upon load. + * + * @api private + */ + +Request.prototype.onLoad = function () { + var data; + try { + var contentType; + try { + contentType = this.xhr.getResponseHeader('Content-Type'); + } catch (e) {} + if (contentType === 'application/octet-stream') { + data = this.xhr.response || this.xhr.responseText; + } else { + data = this.xhr.responseText; + } + } catch (e) { + this.onError(e); + } + if (null != data) { + this.onData(data); + } +}; + +/** + * Check if it has XDomainRequest. + * + * @api private + */ + +Request.prototype.hasXDR = function () { + return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR; +}; + +/** + * Aborts the request. + * + * @api public + */ + +Request.prototype.abort = function () { + this.cleanup(); +}; + +/** + * Aborts pending requests when unloading the window. This is needed to prevent + * memory leaks (e.g. when using IE) and to ensure that no spurious error is + * emitted. + */ + +Request.requestsCount = 0; +Request.requests = {}; + +if (global.document) { + if (global.attachEvent) { + global.attachEvent('onunload', unloadHandler); + } else if (global.addEventListener) { + global.addEventListener('beforeunload', unloadHandler, false); + } +} + +function unloadHandler () { + for (var i in Request.requests) { + if (Request.requests.hasOwnProperty(i)) { + Request.requests[i].abort(); + } + } +} diff --git a/node_modules/engine.io-client/lib/transports/polling.js b/node_modules/engine.io-client/lib/transports/polling.js new file mode 100644 index 0000000..970313e --- /dev/null +++ b/node_modules/engine.io-client/lib/transports/polling.js @@ -0,0 +1,245 @@ +/** + * Module dependencies. + */ + +var Transport = require('../transport'); +var parseqs = require('parseqs'); +var parser = require('engine.io-parser'); +var inherit = require('component-inherit'); +var yeast = require('yeast'); +var debug = require('debug')('engine.io-client:polling'); + +/** + * Module exports. + */ + +module.exports = Polling; + +/** + * Is XHR2 supported? + */ + +var hasXHR2 = (function () { + var XMLHttpRequest = require('xmlhttprequest-ssl'); + var xhr = new XMLHttpRequest({ xdomain: false }); + return null != xhr.responseType; +})(); + +/** + * Polling interface. + * + * @param {Object} opts + * @api private + */ + +function Polling (opts) { + var forceBase64 = (opts && opts.forceBase64); + if (!hasXHR2 || forceBase64) { + this.supportsBinary = false; + } + Transport.call(this, opts); +} + +/** + * Inherits from Transport. + */ + +inherit(Polling, Transport); + +/** + * Transport name. + */ + +Polling.prototype.name = 'polling'; + +/** + * Opens the socket (triggers polling). We write a PING message to determine + * when the transport is open. + * + * @api private + */ + +Polling.prototype.doOpen = function () { + this.poll(); +}; + +/** + * Pauses polling. + * + * @param {Function} callback upon buffers are flushed and transport is paused + * @api private + */ + +Polling.prototype.pause = function (onPause) { + var self = this; + + this.readyState = 'pausing'; + + function pause () { + debug('paused'); + self.readyState = 'paused'; + onPause(); + } + + if (this.polling || !this.writable) { + var total = 0; + + if (this.polling) { + debug('we are currently polling - waiting to pause'); + total++; + this.once('pollComplete', function () { + debug('pre-pause polling complete'); + --total || pause(); + }); + } + + if (!this.writable) { + debug('we are currently writing - waiting to pause'); + total++; + this.once('drain', function () { + debug('pre-pause writing complete'); + --total || pause(); + }); + } + } else { + pause(); + } +}; + +/** + * Starts polling cycle. + * + * @api public + */ + +Polling.prototype.poll = function () { + debug('polling'); + this.polling = true; + this.doPoll(); + this.emit('poll'); +}; + +/** + * Overloads onData to detect payloads. + * + * @api private + */ + +Polling.prototype.onData = function (data) { + var self = this; + debug('polling got data %s', data); + var callback = function (packet, index, total) { + // if its the first message we consider the transport open + if ('opening' === self.readyState) { + self.onOpen(); + } + + // if its a close packet, we close the ongoing requests + if ('close' === packet.type) { + self.onClose(); + return false; + } + + // otherwise bypass onData and handle the message + self.onPacket(packet); + }; + + // decode payload + parser.decodePayload(data, this.socket.binaryType, callback); + + // if an event did not trigger closing + if ('closed' !== this.readyState) { + // if we got data we're not polling + this.polling = false; + this.emit('pollComplete'); + + if ('open' === this.readyState) { + this.poll(); + } else { + debug('ignoring poll - transport state "%s"', this.readyState); + } + } +}; + +/** + * For polling, send a close packet. + * + * @api private + */ + +Polling.prototype.doClose = function () { + var self = this; + + function close () { + debug('writing close packet'); + self.write([{ type: 'close' }]); + } + + if ('open' === this.readyState) { + debug('transport open - closing'); + close(); + } else { + // in case we're trying to close while + // handshaking is in progress (GH-164) + debug('transport not open - deferring close'); + this.once('open', close); + } +}; + +/** + * Writes a packets payload. + * + * @param {Array} data packets + * @param {Function} drain callback + * @api private + */ + +Polling.prototype.write = function (packets) { + var self = this; + this.writable = false; + var callbackfn = function () { + self.writable = true; + self.emit('drain'); + }; + + parser.encodePayload(packets, this.supportsBinary, function (data) { + self.doWrite(data, callbackfn); + }); +}; + +/** + * Generates uri for connection. + * + * @api private + */ + +Polling.prototype.uri = function () { + var query = this.query || {}; + var schema = this.secure ? 'https' : 'http'; + var port = ''; + + // cache busting is forced + if (false !== this.timestampRequests) { + query[this.timestampParam] = yeast(); + } + + if (!this.supportsBinary && !query.sid) { + query.b64 = 1; + } + + query = parseqs.encode(query); + + // avoid port if default for schema + if (this.port && (('https' === schema && Number(this.port) !== 443) || + ('http' === schema && Number(this.port) !== 80))) { + port = ':' + this.port; + } + + // prepend ? to query + if (query.length) { + query = '?' + query; + } + + var ipv6 = this.hostname.indexOf(':') !== -1; + return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query; +}; diff --git a/node_modules/engine.io-client/lib/transports/websocket.js b/node_modules/engine.io-client/lib/transports/websocket.js new file mode 100644 index 0000000..de14ba0 --- /dev/null +++ b/node_modules/engine.io-client/lib/transports/websocket.js @@ -0,0 +1,286 @@ +/** + * Module dependencies. + */ + +var Transport = require('../transport'); +var parser = require('engine.io-parser'); +var parseqs = require('parseqs'); +var inherit = require('component-inherit'); +var yeast = require('yeast'); +var debug = require('debug')('engine.io-client:websocket'); +var BrowserWebSocket = global.WebSocket || global.MozWebSocket; +var NodeWebSocket; +if (typeof window === 'undefined') { + try { + NodeWebSocket = require('ws'); + } catch (e) { } +} + +/** + * Get either the `WebSocket` or `MozWebSocket` globals + * in the browser or try to resolve WebSocket-compatible + * interface exposed by `ws` for Node-like environment. + */ + +var WebSocket = BrowserWebSocket; +if (!WebSocket && typeof window === 'undefined') { + WebSocket = NodeWebSocket; +} + +/** + * Module exports. + */ + +module.exports = WS; + +/** + * WebSocket transport constructor. + * + * @api {Object} connection options + * @api public + */ + +function WS (opts) { + var forceBase64 = (opts && opts.forceBase64); + if (forceBase64) { + this.supportsBinary = false; + } + this.perMessageDeflate = opts.perMessageDeflate; + this.usingBrowserWebSocket = BrowserWebSocket && !opts.forceNode; + this.protocols = opts.protocols; + if (!this.usingBrowserWebSocket) { + WebSocket = NodeWebSocket; + } + Transport.call(this, opts); +} + +/** + * Inherits from Transport. + */ + +inherit(WS, Transport); + +/** + * Transport name. + * + * @api public + */ + +WS.prototype.name = 'websocket'; + +/* + * WebSockets support binary + */ + +WS.prototype.supportsBinary = true; + +/** + * Opens socket. + * + * @api private + */ + +WS.prototype.doOpen = function () { + if (!this.check()) { + // let probe timeout + return; + } + + var uri = this.uri(); + var protocols = this.protocols; + var opts = { + agent: this.agent, + perMessageDeflate: this.perMessageDeflate + }; + + // SSL options for Node.js client + opts.pfx = this.pfx; + opts.key = this.key; + opts.passphrase = this.passphrase; + opts.cert = this.cert; + opts.ca = this.ca; + opts.ciphers = this.ciphers; + opts.rejectUnauthorized = this.rejectUnauthorized; + if (this.extraHeaders) { + opts.headers = this.extraHeaders; + } + if (this.localAddress) { + opts.localAddress = this.localAddress; + } + + try { + this.ws = this.usingBrowserWebSocket ? (protocols ? new WebSocket(uri, protocols) : new WebSocket(uri)) : new WebSocket(uri, protocols, opts); + } catch (err) { + return this.emit('error', err); + } + + if (this.ws.binaryType === undefined) { + this.supportsBinary = false; + } + + if (this.ws.supports && this.ws.supports.binary) { + this.supportsBinary = true; + this.ws.binaryType = 'nodebuffer'; + } else { + this.ws.binaryType = 'arraybuffer'; + } + + this.addEventListeners(); +}; + +/** + * Adds event listeners to the socket + * + * @api private + */ + +WS.prototype.addEventListeners = function () { + var self = this; + + this.ws.onopen = function () { + self.onOpen(); + }; + this.ws.onclose = function () { + self.onClose(); + }; + this.ws.onmessage = function (ev) { + self.onData(ev.data); + }; + this.ws.onerror = function (e) { + self.onError('websocket error', e); + }; +}; + +/** + * Writes data to socket. + * + * @param {Array} array of packets. + * @api private + */ + +WS.prototype.write = function (packets) { + var self = this; + this.writable = false; + + // encodePacket efficient as it uses WS framing + // no need for encodePayload + var total = packets.length; + for (var i = 0, l = total; i < l; i++) { + (function (packet) { + parser.encodePacket(packet, self.supportsBinary, function (data) { + if (!self.usingBrowserWebSocket) { + // always create a new object (GH-437) + var opts = {}; + if (packet.options) { + opts.compress = packet.options.compress; + } + + if (self.perMessageDeflate) { + var len = 'string' === typeof data ? global.Buffer.byteLength(data) : data.length; + if (len < self.perMessageDeflate.threshold) { + opts.compress = false; + } + } + } + + // Sometimes the websocket has already been closed but the browser didn't + // have a chance of informing us about it yet, in that case send will + // throw an error + try { + if (self.usingBrowserWebSocket) { + // TypeError is thrown when passing the second argument on Safari + self.ws.send(data); + } else { + self.ws.send(data, opts); + } + } catch (e) { + debug('websocket closed before onclose event'); + } + + --total || done(); + }); + })(packets[i]); + } + + function done () { + self.emit('flush'); + + // fake drain + // defer to next tick to allow Socket to clear writeBuffer + setTimeout(function () { + self.writable = true; + self.emit('drain'); + }, 0); + } +}; + +/** + * Called upon close + * + * @api private + */ + +WS.prototype.onClose = function () { + Transport.prototype.onClose.call(this); +}; + +/** + * Closes socket. + * + * @api private + */ + +WS.prototype.doClose = function () { + if (typeof this.ws !== 'undefined') { + this.ws.close(); + } +}; + +/** + * Generates uri for connection. + * + * @api private + */ + +WS.prototype.uri = function () { + var query = this.query || {}; + var schema = this.secure ? 'wss' : 'ws'; + var port = ''; + + // avoid port if default for schema + if (this.port && (('wss' === schema && Number(this.port) !== 443) || + ('ws' === schema && Number(this.port) !== 80))) { + port = ':' + this.port; + } + + // append timestamp to URI + if (this.timestampRequests) { + query[this.timestampParam] = yeast(); + } + + // communicate binary support capabilities + if (!this.supportsBinary) { + query.b64 = 1; + } + + query = parseqs.encode(query); + + // prepend ? to query + if (query.length) { + query = '?' + query; + } + + var ipv6 = this.hostname.indexOf(':') !== -1; + return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query; +}; + +/** + * Feature detection for WebSocket. + * + * @return {Boolean} whether this transport is available. + * @api public + */ + +WS.prototype.check = function () { + return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name); +}; |