Added node-modules

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');
+  }
+};