diff options
Diffstat (limited to 'signaling-server/node_modules/socket.io/lib/static.js')
-rw-r--r-- | signaling-server/node_modules/socket.io/lib/static.js | 395 |
1 files changed, 395 insertions, 0 deletions
diff --git a/signaling-server/node_modules/socket.io/lib/static.js b/signaling-server/node_modules/socket.io/lib/static.js new file mode 100644 index 0000000..fe50593 --- /dev/null +++ b/signaling-server/node_modules/socket.io/lib/static.js @@ -0,0 +1,395 @@ + +/*! +* socket.io-node +* Copyright(c) 2011 LearnBoost <dev@learnboost.com> +* MIT Licensed +*/ + +/** + * Module dependencies. + */ + +var client = require('socket.io-client') + , cp = require('child_process') + , fs = require('fs') + , util = require('./util'); + +/** + * File type details. + * + * @api private + */ + +var mime = { + js: { + type: 'application/javascript' + , encoding: 'utf8' + , gzip: true + } + , swf: { + type: 'application/x-shockwave-flash' + , encoding: 'binary' + , gzip: false + } +}; + +/** + * Regexp for matching custom transport patterns. Users can configure their own + * socket.io bundle based on the url structure. Different transport names are + * concatinated using the `+` char. /socket.io/socket.io+websocket.js should + * create a bundle that only contains support for the websocket. + * + * @api private + */ + +var bundle = /\+((?:\+)?[\w\-]+)*(?:\.v\d+\.\d+\.\d+)?(?:\.js)$/ + , versioning = /\.v\d+\.\d+\.\d+(?:\.js)$/; + +/** + * Export the constructor + */ + +exports = module.exports = Static; + +/** + * Static constructor + * + * @api public + */ + +function Static (manager) { + this.manager = manager; + this.cache = {}; + this.paths = {}; + + this.init(); +} + +/** + * Initialize the Static by adding default file paths. + * + * @api public + */ + +Static.prototype.init = function () { + /** + * Generates a unique id based the supplied transports array + * + * @param {Array} transports The array with transport types + * @api private + */ + function id (transports) { + var id = transports.join('').split('').map(function (char) { + return ('' + char.charCodeAt(0)).split('').pop(); + }).reduce(function (char, id) { + return char +id; + }); + + return client.version + ':' + id; + } + + /** + * Generates a socket.io-client file based on the supplied transports. + * + * @param {Array} transports The array with transport types + * @param {Function} callback Callback for the static.write + * @api private + */ + + function build (transports, callback) { + client.builder(transports, { + minify: self.manager.enabled('browser client minification') + }, function (err, content) { + callback(err, content ? new Buffer(content) : null, id(transports)); + } + ); + } + + var self = this; + + // add our default static files + this.add('/static/flashsocket/WebSocketMain.swf', { + file: client.dist + '/WebSocketMain.swf' + }); + + this.add('/static/flashsocket/WebSocketMainInsecure.swf', { + file: client.dist + '/WebSocketMainInsecure.swf' + }); + + // generates dedicated build based on the available transports + this.add('/socket.io.js', function (path, callback) { + build(self.manager.get('transports'), callback); + }); + + this.add('/socket.io.v', { mime: mime.js }, function (path, callback) { + build(self.manager.get('transports'), callback); + }); + + // allow custom builds based on url paths + this.add('/socket.io+', { mime: mime.js }, function (path, callback) { + var available = self.manager.get('transports') + , matches = path.match(bundle) + , transports = []; + + if (!matches) return callback('No valid transports'); + + // make sure they valid transports + matches[0].split('.')[0].split('+').slice(1).forEach(function (transport) { + if (!!~available.indexOf(transport)) { + transports.push(transport); + } + }); + + if (!transports.length) return callback('No valid transports'); + build(transports, callback); + }); + + // clear cache when transports change + this.manager.on('set:transports', function (key, value) { + delete self.cache['/socket.io.js']; + Object.keys(self.cache).forEach(function (key) { + if (bundle.test(key)) { + delete self.cache[key]; + } + }); + }); +}; + +/** + * Gzip compress buffers. + * + * @param {Buffer} data The buffer that needs gzip compression + * @param {Function} callback + * @api public + */ + +Static.prototype.gzip = function (data, callback) { + var gzip = cp.spawn('gzip', ['-9', '-c', '-f', '-n']) + , encoding = Buffer.isBuffer(data) ? 'binary' : 'utf8' + , buffer = [] + , err; + + gzip.stdout.on('data', function (data) { + buffer.push(data); + }); + + gzip.stderr.on('data', function (data) { + err = data +''; + buffer.length = 0; + }); + + gzip.on('close', function () { + if (err) return callback(err); + + var size = 0 + , index = 0 + , i = buffer.length + , content; + + while (i--) { + size += buffer[i].length; + } + + content = new Buffer(size); + i = buffer.length; + + buffer.forEach(function (buffer) { + var length = buffer.length; + + buffer.copy(content, index, 0, length); + index += length; + }); + + buffer.length = 0; + callback(null, content); + }); + + gzip.stdin.end(data, encoding); +}; + +/** + * Is the path a static file? + * + * @param {String} path The path that needs to be checked + * @api public + */ + +Static.prototype.has = function (path) { + // fast case + if (this.paths[path]) return this.paths[path]; + + var keys = Object.keys(this.paths) + , i = keys.length; + + while (i--) { + if (-~path.indexOf(keys[i])) return this.paths[keys[i]]; + } + + return false; +}; + +/** + * Add new paths new paths that can be served using the static provider. + * + * @param {String} path The path to respond to + * @param {Options} options Options for writing out the response + * @param {Function} [callback] Optional callback if no options.file is + * supplied this would be called instead. + * @api public + */ + +Static.prototype.add = function (path, options, callback) { + var extension = /(?:\.(\w{1,4}))$/.exec(path); + + if (!callback && typeof options == 'function') { + callback = options; + options = {}; + } + + options.mime = options.mime || (extension ? mime[extension[1]] : false); + + if (callback) options.callback = callback; + if (!(options.file || options.callback) || !options.mime) return false; + + this.paths[path] = options; + + return true; +}; + +/** + * Writes a static response. + * + * @param {String} path The path for the static content + * @param {HTTPRequest} req The request object + * @param {HTTPResponse} res The response object + * @api public + */ + +Static.prototype.write = function (path, req, res) { + /** + * Write a response without throwing errors because can throw error if the + * response is no longer writable etc. + * + * @api private + */ + + function write (status, headers, content, encoding) { + try { + res.writeHead(status, headers || undefined); + + // only write content if it's not a HEAD request and we actually have + // some content to write (304's doesn't have content). + res.end( + req.method !== 'HEAD' && content ? content : '' + , encoding || undefined + ); + } catch (e) {} + } + + /** + * Answers requests depending on the request properties and the reply object. + * + * @param {Object} reply The details and content to reply the response with + * @api private + */ + + function answer (reply) { + var cached = req.headers['if-none-match'] === reply.etag; + if (cached && self.manager.enabled('browser client etag')) { + return write(304); + } + + var accept = req.headers['accept-encoding'] || '' + , gzip = !!~accept.toLowerCase().indexOf('gzip') + , mime = reply.mime + , versioned = reply.versioned + , headers = { + 'Content-Type': mime.type + }; + + // check if we can add a etag + if (self.manager.enabled('browser client etag') && reply.etag && !versioned) { + headers['Etag'] = reply.etag; + } + + // see if we need to set Expire headers because the path is versioned + if (versioned) { + var expires = self.manager.get('browser client expires'); + headers['Cache-Control'] = 'private, x-gzip-ok="", max-age=' + expires; + headers['Date'] = new Date().toUTCString(); + headers['Expires'] = new Date(Date.now() + (expires * 1000)).toUTCString(); + } + + if (gzip && reply.gzip) { + headers['Content-Length'] = reply.gzip.length; + headers['Content-Encoding'] = 'gzip'; + headers['Vary'] = 'Accept-Encoding'; + write(200, headers, reply.gzip.content, mime.encoding); + } else { + headers['Content-Length'] = reply.length; + write(200, headers, reply.content, mime.encoding); + } + + self.manager.log.debug('served static content ' + path); + } + + var self = this + , details; + + // most common case first + if (this.manager.enabled('browser client cache') && this.cache[path]) { + return answer(this.cache[path]); + } else if (this.manager.get('browser client handler')) { + return this.manager.get('browser client handler').call(this, req, res); + } else if ((details = this.has(path))) { + /** + * A small helper function that will let us deal with fs and dynamic files + * + * @param {Object} err Optional error + * @param {Buffer} content The data + * @api private + */ + + function ready (err, content, etag) { + if (err) { + self.manager.log.warn('Unable to serve file. ' + (err.message || err)); + return write(500, null, 'Error serving static ' + path); + } + + // store the result in the cache + var reply = self.cache[path] = { + content: content + , length: content.length + , mime: details.mime + , etag: etag || client.version + , versioned: versioning.test(path) + }; + + // check if gzip is enabled + if (details.mime.gzip && self.manager.enabled('browser client gzip')) { + self.gzip(content, function (err, content) { + if (!err) { + reply.gzip = { + content: content + , length: content.length + } + } + + answer(reply); + }); + } else { + answer(reply); + } + } + + if (details.file) { + fs.readFile(details.file, ready); + } else if(details.callback) { + details.callback.call(this, path, ready); + } else { + write(404, null, 'File handle not found'); + } + } else { + write(404, null, 'File not found'); + } +}; |