socketcluster-client/socketcluster.js

SocketCluster JavaScript client

(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.socketCluster = 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(require,module,exports){
var SCSocket = require('./lib/scsocket');
module.exports.SCSocket = SCSocket;

module.exports.SCEmitter = require('sc-emitter').SCEmitter;

module.exports.connect = function (options) {
  return new SCSocket(options);
};

module.exports.version = '2.3.18';

},{"./lib/scsocket":5,"sc-emitter":11}],2:[function(require,module,exports){
(function (global){
var AuthEngine = function () {
  this._internalStorage = {};
};

AuthEngine.prototype._isLocalStorageEnabled = function () {
  var err;
  try {
    // Some browsers will throw an error here if localStorage is disabled.
    global.localStorage;
  } catch (e) {
    err = e;
  }
  return !err;
};

AuthEngine.prototype.saveToken = function (name, token, options, callback) {
  if (this._isLocalStorageEnabled() && global.localStorage) {
    global.localStorage.setItem(name, token);
  } else {
    this._internalStorage[name] = token;
  }
  callback && callback();
};

AuthEngine.prototype.removeToken = function (name, callback) {
  if (this._isLocalStorageEnabled() && global.localStorage) {
    global.localStorage.removeItem(name);
  }
  delete this._internalStorage[name];

  callback && callback();
};

AuthEngine.prototype.loadToken = function (name, callback) {
  var token;

  if (this._isLocalStorageEnabled() && global.localStorage) {
    token = global.localStorage.getItem(name);
  } else {
    token = this._internalStorage[name] || null;
  }
  callback(null, token);
};

module.exports.AuthEngine = AuthEngine;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],3:[function(require,module,exports){
module.exports.create = (function () {
  function F() {};

  return function (o) {
    if (arguments.length != 1) {
      throw new Error('Object.create implementation only accepts one parameter.');
    }
    F.prototype = o;
    return new F();
  }
})();
},{}],4:[function(require,module,exports){
var Response = function (socket, id) {
  this.socket = socket;
  this.id = id;
};

Response.prototype._respond = function (responseData) {
  this.socket.send(this.socket.stringify(responseData));
};

Response.prototype.end = function (data) {
  if (this.id) {
    var responseData = {
      rid: this.id
    };
    if (data !== undefined) {
      responseData.data = data;
    }
    this._respond(responseData);
  }
};

Response.prototype.error = function (error, data) {
  if (this.id) {
    var err;
    if (error instanceof Error) {
      err = {name: error.name, message: error.message, stack: error.stack};      
    } else {
      err = error;
    }
    
    var responseData = {
      rid: this.id,
      error: err
    };
    if (data !== undefined) {
      responseData.data = data;
    }
    
    this._respond(responseData);
  }
};

Response.prototype.callback = function (error, data) {
  if (error) {
    this.error(error, data);
  } else {
    this.end(data);
  }
};

module.exports.Response = Response;

},{}],5:[function(require,module,exports){
(function (global){
var SCEmitter = require('sc-emitter').SCEmitter;
var SCChannel = require('sc-channel').SCChannel;
var Response = require('./response').Response;
var AuthEngine = require('./auth').AuthEngine;
var SCTransport = require('./sctransport').SCTransport;
var querystring = require('querystring');
var LinkedList = require('linked-list');

if (!Object.create) {
  Object.create = require('./objectcreate');
}

var isBrowser = typeof window != 'undefined';


var SCSocket = function (options) {
  var self = this;

  SCEmitter.call(this);

  var opts = {
    port: null,
    autoReconnect: true,
    autoProcessSubscriptions: true,
    ackTimeout: 10000,
    hostname: global.location && location.hostname,
    path: '/socketcluster/',
    secure: global.location && location.protocol == 'https:',
    timestampRequests: false,
    timestampParam: 't',
    authEngine: null,
    authTokenName: 'socketCluster.authToken',
    binaryType: 'arraybuffer'
  };
  for (var i in options) {
    if (options.hasOwnProperty(i)) {
      opts[i] = options[i];
    }
  }

  this.id = null;
  this.state = this.CLOSED;
  this.pendingConnectCallback = false;

  this.ackTimeout = opts.ackTimeout;

  // pingTimeout will be ackTimeout at the start, but it will
  // be updated with values provided by the 'connect' event
  this.pingTimeout = this.ackTimeout;

  var maxTimeout = Math.pow(2, 31) - 1;

  var verifyDuration = function (propertyName) {
    if (self[propertyName] > maxTimeout) {
      throw new Error('The ' + propertyName +
        ' value provided exceeded the maximum amount allowed');
    }
  };

  verifyDuration('ackTimeout');
  verifyDuration('pingTimeout');

  this._localEvents = {
    'connect': 1,
    'connectAbort': 1,
    'disconnect': 1,
    'message': 1,
    'error': 1,
    'raw': 1,
    'fail': 1,
    'kickOut': 1,
    'subscribe': 1,
    'unsubscribe': 1,
    'authenticate': 1,
    'removeAuthToken': 1
  };

  this._connectAttempts = 0;

  this._emitBuffer = new LinkedList();
  this._channels = {};

  this.options = opts;

  this._cid = 1;

  this.options.callIdGenerator = function () {
    return self._callIdGenerator();
  };

  if (this.options.autoReconnect) {
    if (this.options.autoReconnectOptions == null) {
      this.options.autoReconnectOptions = {};
    }

    var reconnectOptions = this.options.autoReconnectOptions;
    if (reconnectOptions.initialDelay == null) {
      reconnectOptions.initialDelay = 10000;
    }
    if (reconnectOptions.randomness == null) {
      reconnectOptions.randomness = 10000;
    }
    if (reconnectOptions.multiplier == null) {
      reconnectOptions.multiplier = 1.5;
    }
    if (reconnectOptions.maxDelay == null) {
      reconnectOptions.maxDelay = 60000;
    }
  }

  if (this.options.subscriptionRetryOptions == null) {
    this.options.subscriptionRetryOptions = {};
  }

  if (this.options.authEngine) {
    this.auth = this.options.authEngine;
  } else {
    this.auth = new AuthEngine();
  }

  this.options.path = this.options.path.replace(/\/$/, '') + '/';

  this.options.query = opts.query || {};
  if (typeof this.options.query == 'string') {
    this.options.query = querystring.parse(this.options.query);
  }

  this.options.port = opts.port || (global.location && location.port ?
    location.port : (this.options.secure ? 443 : 80));

  this.connect();

  this._channelEmitter = new SCEmitter();

  if (isBrowser) {
    var unloadHandler = function () {
      self.disconnect();
    };

    if (global.attachEvent) {
      global.attachEvent('onunload', unloadHandler);
    } else if (global.addEventListener) {
      global.addEventListener('beforeunload', unloadHandler, false);
    }
  }
};

SCSocket.prototype = Object.create(SCEmitter.prototype);

SCSocket.CONNECTING = SCSocket.prototype.CONNECTING = SCTransport.prototype.CONNECTING;
SCSocket.OPEN = SCSocket.prototype.OPEN = SCTransport.prototype.OPEN;
SCSocket.CLOSED = SCSocket.prototype.CLOSED = SCTransport.prototype.CLOSED;

SCSocket.ignoreStatuses = {
  1000: 'Socket closed normally',
  1001: 'Socket hung up'
};

SCSocket.errorStatuses = {
  1001: 'Socket was disconnected',
  1002: 'A WebSocket protocol error was encountered',
  1003: 'Server terminated socket because it received invalid data',
  1005: 'Socket closed without status code',
  1006: 'Socket hung up',
  1007: 'Message format was incorrect',
  1008: 'Encountered a policy violation',
  1009: 'Message was too big to process',
  1010: 'Client ended the connection because the server did not comply with extension requirements',
  1011: 'Server encountered an unexpected fatal condition',
  4000: 'Server ping timed out',
  4001: 'Client pong timed out',
  4002: 'Server failed to sign auth token',
  4003: 'Failed to complete handshake',
  4004: 'Client failed to save auth token'
};

SCSocket.prototype._privateEventHandlerMap = {
  '#fail': function (data) {
    this._onSCError(data);
  },
  '#publish': function (data) {
    var isSubscribed = this.isSubscribed(data.channel, true);

    if (isSubscribed) {
      this._channelEmitter.emit(data.channel, data.data);
    }
  },
  '#kickOut': function (data) {
    var channelName = data.channel;
    var channel = this._channels[channelName];
    if (channel) {
      SCEmitter.prototype.emit.call(this, 'kickOut', data.message, channelName);
      channel.emit('kickOut', data.message, channelName);
      this._triggerChannelUnsubscribe(channel);
    }
  },
  '#setAuthToken': function (data, response) {
    var self = this;

    if (data) {
      var triggerAuthenticate = function (err) {
        if (err) {
          // This is a non-fatal error, we don't want to close the connection
          // because of this but we do want to notify the server and throw an error
          // on the client.
          response.error(err.message || err);
          self._onSCError(err);
        } else {
          SCEmitter.prototype.emit.call(self, 'authenticate', data.token);
          response.end();
        }
      };

      this.auth.saveToken(this.options.authTokenName, data.token, {}, triggerAuthenticate);
    } else {
      response.error('No token data provided by #setAuthToken event');
    }
  },
  '#removeAuthToken': function (data, response) {
    var self = this;

    this.auth.removeToken(this.options.authTokenName, function (err) {
      if (err) {
        // Non-fatal error - Do not close the connection
        response.error(err.message || err);
        self._onSCError(err);
      } else {
        SCEmitter.prototype.emit.call(self, 'removeAuthToken');
        response.end();
      }
    });
  },
  '#disconnect': function (data) {
    this.transport.close(data.code, data.data);
  }
};

SCSocket.prototype._callIdGenerator = function () {
  return this._cid++;
};

SCSocket.prototype.getState = function () {
  return this.state;
};

SCSocket.prototype.getBytesReceived = function () {
  return this.transport.getBytesReceived();
};

SCSocket.prototype.removeAuthToken = function (callback) {
  var self = this;

  this.auth.removeToken(this.options.authTokenName, function (err) {
    callback && callback(err);
    if (err) {
      // Non-fatal error - Do not close the connection
      self._onSCError(err);
    } else {
      SCEmitter.prototype.emit.call(self, 'removeAuthToken');
    }
  });
};

SCSocket.prototype.connect = SCSocket.prototype.open = function () {
  var self = this;

  if (this.state == this.CLOSED) {
    clearTimeout(this._reconnectTimeout);

    this.state = this.CONNECTING;

    if (this.transport) {
      this.transport.off();
    }

    this.transport = new SCTransport(this.auth, this.options);

    this.transport.on('open', function (status) {
      self.state = self.OPEN;
      self._onSCOpen(status);
    });

    this.transport.on('error', function (err) {
      self._onSCError(err);
    });

    this.transport.on('close', function (code, data) {
      self.state = self.CLOSED;
      self._onSCClose(code, data);
    });

    this.transport.on('openAbort', function (code, data) {
      self.state = self.CLOSED;
      self._onSCClose(code, data, true);
    });

    this.transport.on('event', function (event, data, res) {
      self._onSCEvent(event, data, res);
    });
  }
};

SCSocket.prototype.reconnect = function () {
  this.disconnect();
  this.connect();
};

SCSocket.prototype.disconnect = function (code, data) {
  code = code || 1000;

  if (this.state == this.OPEN) {
    var packet = {
      code: code,
      data: data
    };
    this.transport.emit('#disconnect', packet);
    this.transport.close(code);

  } else if (this.state == this.CONNECTING) {
    this.transport.close(code);
  }
};

// Perform client-initiated authentication by providing an encrypted token string
SCSocket.prototype.authenticate = function (encryptedAuthToken, callback) {
  var self = this;

  this.emit('#authenticate', encryptedAuthToken, function (err, authStatus) {
    if (err) {
      callback && callback(err, authStatus);
    } else {
      self.auth.saveToken(self.options.authTokenName, encryptedAuthToken, {}, function (err) {
        callback && callback(err, authStatus);
        if (err) {
          self._onSCError(err);
        } else if (authStatus.isAuthenticated) {
          SCEmitter.prototype.emit.call(self, 'authenticate', encryptedAuthToken);
        }
      });
    }
  });
};

SCSocket.prototype._tryReconnect = function (initialDelay) {
  var self = this;

  var exponent = this._connectAttempts++;
  var reconnectOptions = this.options.autoReconnectOptions;
  var timeout;

  if (initialDelay == null || exponent > 0) {
    var initialTimeout = Math.round(reconnectOptions.initialDelay + (reconnectOptions.randomness || 0) * Math.random());

    timeout = Math.round(initialTimeout * Math.pow(reconnectOptions.multiplier, exponent));
  } else {
    timeout = initialDelay;
  }

  if (timeout > reconnectOptions.maxDelay) {
    timeout = reconnectOptions.maxDelay;
  }

  clearTimeout(this._reconnectTimeout);

  this._reconnectTimeout = setTimeout(function () {
    self.connect();
  }, timeout);
};

SCSocket.prototype._onSCOpen = function (status) {
  var self = this;

  if (status) {
    this.id = status.id;
    this.pingTimeout = status.pingTimeout;
    this.transport.pingTimeout = this.pingTimeout;
  }

  this._connectAttempts = 0;
  if (this.options.autoProcessSubscriptions) {
    this.processPendingSubscriptions();
  } else {
    this.pendingConnectCallback = true;
  }

  // If the user invokes the callback while in autoProcessSubscriptions mode, it
  // won't break anything - The processPendingSubscriptions() call will be a no-op.
  SCEmitter.prototype.emit.call(this, 'connect', status, function () {
    self.processPendingSubscriptions();
  });

  this._flushEmitBuffer();
};

SCSocket.prototype._onSCError = function (err) {
  var self = this;

  // Throw error in different stack frame so that error handling
  // cannot interfere with a reconnect action.
  setTimeout(function () {
    if (self.listeners('error').length < 1) {
      throw err;
    } else {
      SCEmitter.prototype.emit.call(self, 'error', err);
    }
  }, 0);
};

SCSocket.prototype._suspendSubscriptions = function () {
  var channel, newState;
  for (var channelName in this._channels) {
    if (this._channels.hasOwnProperty(channelName)) {
      channel = this._channels[channelName];
      if (channel.state == channel.SUBSCRIBED ||
        channel.state == channel.PENDING) {

        newState = channel.PENDING;
      } else {
        newState = channel.UNSUBSCRIBED;
      }

      this._triggerChannelUnsubscribe(channel, newState);
    }
  }
};

SCSocket.prototype._onSCClose = function (code, data, openAbort) {
  var self = this;

  this.id = null;

  if (this.transport) {
    this.transport.off();
  }
  clearTimeout(this._reconnectTimeout);

  this._suspendSubscriptions();

  if (openAbort) {
    SCEmitter.prototype.emit.call(self, 'connectAbort', code, data);
  } else {
    SCEmitter.prototype.emit.call(self, 'disconnect', code, data);
  }

  // Try to reconnect
  // on server ping timeout (4000)
  // or on client pong timeout (4001)
  // or on close without status (1005)
  // or on handshake failure (4003)
  // or on socket hung up (1006)
  if (this.options.autoReconnect) {
    if (code == 4000 || code == 4001 || code == 1005) {
      // If there is a ping or pong timeout or socket closes without
      // status, don't wait before trying to reconnect - These could happen
      // if the client wakes up after a period of inactivity and in this case we
      // want to re-establish the connection as soon as possible.
      this._tryReconnect(0);

    } else if (code != 1000) {
      this._tryReconnect();
    }
  }

  if (!SCSocket.ignoreStatuses[code]) {
    var err = new Error(SCSocket.errorStatuses[code] || 'Socket connection failed for unknown reasons');
    err.code = code;
    this._onSCError(err);
  }
};

SCSocket.prototype._onSCEvent = function (event, data, res) {
  var handler = this._privateEventHandlerMap[event];
  if (handler) {
    handler.call(this, data, res);
  } else {
    SCEmitter.prototype.emit.call(this, event, data, function () {
      res && res.callback.apply(res, arguments);
    });
  }
};

SCSocket.prototype.parse = function (message) {
  return this.transport.parse(message);
};

SCSocket.prototype.stringify = function (object) {
  return this.transport.stringify(object);
};

SCSocket.prototype._flushEmitBuffer = function () {
  var currentNode = this._emitBuffer.head;
  var nextNode;

  while (currentNode) {
    nextNode = currentNode.next;
    var eventObject = currentNode.data;
    currentNode.detach();
    this.transport.emitRaw(eventObject);
    currentNode = nextNode;
  }
};

SCSocket.prototype._handleEventAckTimeout = function (eventObject, eventNode) {
  var errorMessage = "Event response for '" + eventObject.event + "' timed out";
  var error = new Error(errorMessage);
  error.type = 'timeout';

  var callback = eventObject.callback;
  delete eventObject.callback;
  if (eventNode) {
    eventNode.detach();
  }
  callback.call(eventObject, error, eventObject);
  this._onSCError(error);
};

SCSocket.prototype._emit = function (event, data, callback) {
  var self = this;

  if (this.state == this.CLOSED) {
    this.connect();
  }
  var eventObject = {
    event: event,
    data: data,
    callback: callback
  };

  var eventNode = new LinkedList.Item();
  eventNode.data = eventObject;

  // Events which do not have a callback will be treated as volatile
  if (callback) {
    eventObject.timeout = setTimeout(function () {
      self._handleEventAckTimeout(eventObject, eventNode);
    }, this.ackTimeout);
  }
  this._emitBuffer.append(eventNode);

  if (this.state == this.OPEN) {
    this._flushEmitBuffer();
  }
};

SCSocket.prototype.emit = function (event, data, callback) {
  if (this._localEvents[event] == null) {
    this._emit(event, data, callback);
  } else {
    SCEmitter.prototype.emit.call(this, event, data);
  }
};

SCSocket.prototype.publish = function (channelName, data, callback) {
  var pubData = {
    channel: channelName,
    data: data
  };
  this.emit('#publish', pubData, function (err) {
    callback && callback(err);
  });
};

SCSocket.prototype._triggerChannelSubscribe = function (channel) {
  var channelName = channel.name;

  if (channel.state != channel.SUBSCRIBED) {
    channel.state = channel.SUBSCRIBED;

    channel.emit('subscribe', channelName);
    SCEmitter.prototype.emit.call(this, 'subscribe', channelName);
  }
};

SCSocket.prototype._triggerChannelSubscribeFail = function (err, channel) {
  var channelName = channel.name;

  if (channel.state != channel.UNSUBSCRIBED) {
    channel.state = channel.UNSUBSCRIBED;

    channel.emit('subscribeFail', err, channelName);
    SCEmitter.prototype.emit.call(this, 'subscribeFail', err, channelName);
  }
};

// Cancel any pending subscribe callback
SCSocket.prototype._cancelPendingSubscribeCallback = function (channel) {
  if (channel._pendingSubscriptionCid != null) {
    this.transport.cancelPendingResponse(channel._pendingSubscriptionCid);
    delete channel._pendingSubscriptionCid;
  }
};

SCSocket.prototype._trySubscribe = function (channel) {
  var self = this;

  // We can only ever have one pending subscribe action at any given time on a channel
  if (this.state == this.OPEN && !this.pendingConnectCallback && channel._pendingSubscriptionCid == null) {
    var options = {
      noTimeout: true
    };

    channel._pendingSubscriptionCid = this.transport.emit(
      '#subscribe', channel.name, options,
      function (err) {
        delete channel._pendingSubscriptionCid;
        if (err) {
          self._triggerChannelSubscribeFail(err, channel);
        } else {
          self._triggerChannelSubscribe(channel);
        }
      }
    );
  }
};

SCSocket.prototype.subscribe = function (channelName) {
  var channel = this._channels[channelName];

  if (!channel) {
    channel = new SCChannel(channelName, this);
    this._channels[channelName] = channel;
  }

  if (channel.state == channel.UNSUBSCRIBED) {
    channel.state = channel.PENDING;
    this._trySubscribe(channel);
  }

  return channel;
};

SCSocket.prototype._triggerChannelUnsubscribe = function (channel, newState) {
  var channelName = channel.name;
  var oldState = channel.state;

  if (newState) {
    channel.state = newState;
  } else {
    channel.state = channel.UNSUBSCRIBED;
  }
  this._cancelPendingSubscribeCallback(channel);

  if (oldState == channel.SUBSCRIBED) {
    channel.emit('unsubscribe', channelName);
    SCEmitter.prototype.emit.call(this, 'unsubscribe', channelName);
  }
};

SCSocket.prototype._tryUnsubscribe = function (channel) {
  var self = this;

  if (this.state == this.OPEN) {
    var options = {
      noTimeout: true
    };
    // If there is a pending subscribe action, cancel the callback
    this._cancelPendingSubscribeCallback(channel);

    // This operation cannot fail because the TCP protocol guarantees delivery
    // so long as the connection remains open. If the connection closes,
    // the server will automatically unsubscribe the socket and thus complete
    // the operation on the server side.
    this.transport.emit('#unsubscribe', channel.name, options);
  }
};

SCSocket.prototype.unsubscribe = function (channelName) {

  var channel = this._channels[channelName];

  if (channel) {
    if (channel.state != channel.UNSUBSCRIBED) {

      this._triggerChannelUnsubscribe(channel);
      this._tryUnsubscribe(channel);
    }
  }
};

SCSocket.prototype.channel = function (channelName) {
  var currentChannel = this._channels[channelName];

  if (!currentChannel) {
    currentChannel = new SCChannel(channelName, this);
    this._channels[channelName] = currentChannel;
  }
  return currentChannel;
};

SCSocket.prototype.destroyChannel = function (channelName) {
  var channel = this._channels[channelName];
  channel.unwatch();
  channel.unsubscribe();
  delete this._channels[channelName];
};

SCSocket.prototype.subscriptions = function (includePending) {
  var subs = [];
  var channel, includeChannel;
  for (var channelName in this._channels) {
    if (this._channels.hasOwnProperty(channelName)) {
      channel = this._channels[channelName];

      if (includePending) {
        includeChannel = channel && (channel.state == channel.SUBSCRIBED ||
          channel.state == channel.PENDING);
      } else {
        includeChannel = channel && channel.state == channel.SUBSCRIBED;
      }

      if (includeChannel) {
        subs.push(channelName);
      }
    }
  }
  return subs;
};

SCSocket.prototype.isSubscribed = function (channel, includePending) {
  var channel = this._channels[channel];
  if (includePending) {
    return !!channel && (channel.state == channel.SUBSCRIBED ||
      channel.state == channel.PENDING);
  }
  return !!channel && channel.state == channel.SUBSCRIBED;
};

SCSocket.prototype.processPendingSubscriptions = function () {
  var self = this;

  this.pendingConnectCallback = false;

  var channels = [];
  for (var channelName in this._channels) {
    if (this._channels.hasOwnProperty(channelName)) {
      channels.push(channelName);
    }
  }

  for (var i in this._channels) {
    if (this._channels.hasOwnProperty(i)) {
      (function (channel) {
        if (channel.state == channel.PENDING) {
          self._trySubscribe(channel);
        }
      })(this._channels[i]);
    }
  }
};

SCSocket.prototype.watch = function (channelName, handler) {
  if (typeof handler != 'function') {
    throw new Error('No handler function was provided');
  }
  this._channelEmitter.on(channelName, handler);
};

SCSocket.prototype.unwatch = function (channelName, handler) {
  if (handler) {
    this._channelEmitter.removeListener(channelName, handler);
  } else {
    this._channelEmitter.removeAllListeners(channelName);
  }
};

SCSocket.prototype.watchers = function (channelName) {
  return this._channelEmitter.listeners(channelName);
};

module.exports = SCSocket;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./auth":2,"./objectcreate":3,"./response":4,"./sctransport":6,"linked-list":8,"querystring":18,"sc-channel":9,"sc-emitter":11}],6:[function(require,module,exports){
var WebSocket = require('sc-ws');
var SCEmitter = require('sc-emitter').SCEmitter;
var formatter = require('sc-formatter');
var Response = require('./response').Response;
var querystring = require('querystring');

var SCTransport = function (authEngine, options) {
  this.state = this.CLOSED;
  this.auth = authEngine;
  this.options = options;
  this.pingTimeout = options.ackTimeout;
  this.callIdGenerator = options.callIdGenerator;

  this._pingTimeoutTicker = null;
  this._callbackMap = {};

  this.open();
};

SCTransport.prototype = Object.create(SCEmitter.prototype);

SCTransport.CONNECTING = SCTransport.prototype.CONNECTING = 'connecting';
SCTransport.OPEN = SCTransport.prototype.OPEN = 'open';
SCTransport.CLOSED = SCTransport.prototype.CLOSED = 'closed';

SCTransport.prototype.uri = function () {
  var query = this.options.query || {};
  var schema = this.options.secure ? 'wss' : 'ws';
  var port = '';

  if (this.options.port && (('wss' == schema && this.options.port != 443)
    || ('ws' == schema && this.options.port != 80))) {
    port = ':' + this.options.port;
  }

  if (this.options.timestampRequests) {
    query[this.options.timestampParam] = (new Date()).getTime();
  }

  query = querystring.stringify(query);

  if (query.length) {
    query = '?' + query;
  }

  return schema + '://' + this.options.hostname + port + this.options.path + query;
};

SCTransport.prototype.open = function () {
  var self = this;

  this.state = this.CONNECTING;
  var uri = this.uri();

  var wsSocket = new WebSocket(uri, null, this.options);
  wsSocket.binaryType = this.options.binaryType;
  this.socket = wsSocket;

  wsSocket.onopen = function () {
    self._onOpen();
  };

  wsSocket.onclose = function (event) {
    self._onClose(event.code, event.reason);
  };

  wsSocket.onmessage = function (message, flags) {
    self._onMessage(message.data);
  };

  wsSocket.onerror = function (error) {
    // The onclose event will be called automatically after the onerror event
    // if the socket is connected - Otherwise, if it's in the middle of
    // connecting, we want to close it manually with a 1006 - This is necessary
    // to prevent inconsistent behavior when running the client in Node.js
    // vs in a browser.

    if (self.state === self.CONNECTING) {
      self._onClose(1006);
    }
  };
};

SCTransport.prototype._onOpen = function () {
  var self = this;

  this._resetPingTimeout();

  this._handshake(function (err, status) {
    if (err) {
      self._onError(err);
      self._onClose(4003);
      self.socket.close(4003);
    } else {
      self.state = self.OPEN;
      SCEmitter.prototype.emit.call(self, 'open', status);
      self._resetPingTimeout();
    }
  });
};

SCTransport.prototype._handshake = function (callback) {
  var self = this;
  this.auth.loadToken(this.options.authTokenName, function (err, token) {
    if (err) {
      callback(err);
    } else {
      // Don't wait for this.state to be 'open'.
      // The underlying WebSocket (this.socket) is already open.
      var options = {
        force: true
      };
      self.emit('#handshake', {
        authToken: token
      }, options, callback);
    }
  });
};

SCTransport.prototype._onClose = function (code, data) {
  delete this.socket.onopen;
  delete this.socket.onclose;
  delete this.socket.onmessage;
  delete this.socket.onerror;

  if (this.state == this.OPEN) {
    this.state = this.CLOSED;
    SCEmitter.prototype.emit.call(this, 'close', code, data);

  } else if (this.state == this.CONNECTING) {
    this.state = this.CLOSED;
    SCEmitter.prototype.emit.call(this, 'openAbort', code, data);
  }
};

SCTransport.prototype._onMessage = function (message) {
  SCEmitter.prototype.emit.call(this, 'event', 'message', message);

  // If ping
  if (message == '1') {
    this._resetPingTimeout();
    if (this.socket.readyState == this.socket.OPEN) {
      this.socket.send('2');
    }
  } else {
    var obj;
    try {
      obj = this.parse(message);
    } catch (err) {
      obj = message;
    }
    var event = obj.event;

    if (event) {
      var response = new Response(this, obj.cid);
      SCEmitter.prototype.emit.call(this, 'event', event, obj.data, response);
    } else if (obj.rid != null) {
      var eventObject = this._callbackMap[obj.rid];
      if (eventObject) {
        clearTimeout(eventObject.timeout);
        delete this._callbackMap[obj.rid];

        if (eventObject.callback) {
          eventObject.callback(obj.error, obj.data);
        }
      }
      if (obj.error) {
        this._onError(obj.error);
      }
    } else {
      SCEmitter.prototype.emit.call(this, 'event', 'raw', obj);
    }
  }
};

SCTransport.prototype._onError = function (err) {
  SCEmitter.prototype.emit.call(this, 'error', err);
};

SCTransport.prototype._resetPingTimeout = function () {
  var self = this;

  var now = (new Date()).getTime();
  clearTimeout(this._pingTimeoutTicker);

  this._pingTimeoutTicker = setTimeout(function () {
    self._onClose(4000);
    self.socket.close(4000);
  }, this.pingTimeout);
};

SCTransport.prototype.getBytesReceived = function () {
  return this.socket.bytesReceived;
};

SCTransport.prototype.close = function (code, data) {
  code = code || 1000;

  if (this.state == this.OPEN) {
    var packet = {
      code: code,
      data: data
    };
    this.emit('#disconnect', packet);

    this._onClose(code, data);
    this.socket.close(code);

  } else if (this.state == this.CONNECTING) {
    this._onClose(code, data);
    this.socket.close(code);
  }
};

SCTransport.prototype.emitRaw = function (eventObject) {
  eventObject.cid = this.callIdGenerator();

  if (eventObject.callback) {
    this._callbackMap[eventObject.cid] = eventObject;
  }

  var simpleEventObject = {
    event: eventObject.event,
    data: eventObject.data,
    cid: eventObject.cid
  };

  this.sendObject(simpleEventObject);
  return eventObject.cid;
};


SCTransport.prototype._handleEventAckTimeout = function (eventObject) {
  var errorMessage = "Event response for '" + eventObject.event + "' timed out";
  var error = new Error(errorMessage);
  error.type = 'timeout';

  if (eventObject.cid) {
    delete this._callbackMap[eventObject.cid];
  }
  var callback = eventObject.callback;
  delete eventObject.callback;
  callback.call(eventObject, error, eventObject);
  this._onError(error);
};

// The last two optional arguments (a and b) can be options and/or callback
SCTransport.prototype.emit = function (event, data, a, b) {
  var self = this;

  var callback, options;

  if (b) {
    options = a;
    callback = b;
  } else {
    if (a instanceof Function) {
      options = {};
      callback = a;
    } else {
      options = a;
    }
  }

  var eventObject = {
    event: event,
    data: data,
    callback: callback
  };

  if (callback && !options.noTimeout) {
    eventObject.timeout = setTimeout(function () {
      self._handleEventAckTimeout(eventObject);
    }, this.options.ackTimeout);
  }

  var cid = null;
  if (this.state == this.OPEN || options.force) {
    cid = this.emitRaw(eventObject);
  }
  return cid;
};

SCTransport.prototype.cancelPendingResponse = function (cid) {
  delete this._callbackMap[cid];
};

SCTransport.prototype.parse = function (message) {
  return formatter.parse(message);
};

SCTransport.prototype.stringify = function (object) {
  return formatter.stringify(object);
};

SCTransport.prototype.send = function (data) {
  if (this.socket.readyState != this.socket.OPEN) {
    this._onClose(1005);
  } else {
    this.socket.send(data);
  }
};

SCTransport.prototype.sendObject = function (object) {
  var str, formatError;
  try {
    str = this.stringify(object);
  } catch (err) {
    formatError = err;
    this._onError(formatError);
  }
  if (!formatError) {
    this.send(str);
  }
};

module.exports.SCTransport = SCTransport;

},{"./response":4,"querystring":18,"sc-emitter":11,"sc-formatter":14,"sc-ws":15}],7:[function(require,module,exports){
'use strict';

/**
 * Constants.
 */

var errorMessage;

errorMessage = 'An argument without append, prepend, ' +
    'or detach methods was given to `List';

/**
 * Creates a new List: A linked list is a bit like an Array, but
 * knows nothing about how many items are in it, and knows only about its
 * first (`head`) and last (`tail`) items. Each item (e.g. `head`, `tail`,
 * &c.) knows which item comes before or after it (its more like the
 * implementation of the DOM in JavaScript).
 * @global
 * @private
 * @constructor
 * @class Represents an instance of List.
 */

function List(/*items...*/) {
    if (arguments.length) {
        return List.from(arguments);
    }
}

var ListPrototype;

ListPrototype = List.prototype;

/**
 * Creates a new list from the arguments (each a list item) passed in.
 * @name List.of
 * @param {...ListItem} [items] - Zero or more items to attach.
 * @returns {list} - A new instance of List.
 */

List.of = function (/*items...*/) {
    return List.from.call(this, arguments);
};

/**
 * Creates a new list from the given array-like object (each a list item)
 * passed in.
 * @name List.from
 * @param {ListItem[]} [items] - The items to append.
 * @returns {list} - A new instance of List.
 */
List.from = function (items) {
    var list = new this(), length, iterator, item;

    if (items && (length = items.length)) {
        iterator = -1;

        while (++iterator < length) {
            item = items[iterator];

            if (item !== null && item !== undefined) {
                list.append(item);
            }
        }
    }

    return list;
};

/**
 * List#head
 * Default to `null`.
 */
ListPrototype.head = null;

/**
 * List#tail
 * Default to `null`.
 */
ListPrototype.tail = null;

/**
 * Returns the list's items as an array. This does *not* detach the items.
 * @name List#toArray
 * @returns {ListItem[]} - An array of (still attached) ListItems.
 */
ListPrototype.toArray = function () {
    var item = this.head,
        result = [];

    while (item) {
        result.push(item);
        item = item.next;
    }

    return result;
};

/**
 * Prepends the given item to the list: Item will be the new first item
 * (`head`).
 * @name List#prepend
 * @param {ListItem} item - The item to prepend.
 * @returns {ListItem} - An instance of ListItem (the given item).
 */
ListPrototype.prepend = function (item) {
    if (!item) {
        return false;
    }

    if (!item.append || !item.prepend || !item.detach) {
        throw new Error(errorMessage + '#prepend`.');
    }

    var self, head;

    // Cache self.
    self = this;

    // If self has a first item, defer prepend to the first items prepend
    // method, and return the result.
    head = self.head;

    if (head) {
        return head.prepend(item);
    }

    // ...otherwise, there is no `head` (or `tail`) item yet.

    // Detach the prependee.
    item.detach();

    // Set the prependees parent list to reference self.
    item.list = self;

    // Set self's first item to the prependee, and return the item.
    self.head = item;

    return item;
};

/**
 * Appends the given item to the list: Item will be the new last item (`tail`)
 * if the list had a first item, and its first item (`head`) otherwise.
 * @name List#append
 * @param {ListItem} item - The item to append.
 * @returns {ListItem} - An instance of ListItem (the given item).
 */

ListPrototype.append = function (item) {
    if (!item) {
        return false;
    }

    if (!item.append || !item.prepend || !item.detach) {
        throw new Error(errorMessage + '#append`.');
    }

    var self, head, tail;

    // Cache self.
    self = this;

    // If self has a last item, defer appending to the last items append
    // method, and return the result.
    tail = self.tail;

    if (tail) {
        return tail.append(item);
    }

    // If self has a first item, defer appending to the first items append
    // method, and return the result.
    head = self.head;

    if (head) {
        return head.append(item);
    }

    // ...otherwise, there is no `tail` or `head` item yet.

    // Detach the appendee.
    item.detach();

    // Set the appendees parent list to reference self.
    item.list = self;

    // Set self's first item to the appendee, and return the item.
    self.head = item;

    return item;
};

/**
 * Creates a new ListItem: A linked list item is a bit like DOM node:
 * It knows only about its "parent" (`list`), the item before it (`prev`),
 * and the item after it (`next`).
 * @global
 * @private
 * @constructor
 * @class Represents an instance of ListItem.
 */

function ListItem() {}

List.Item = ListItem;

var ListItemPrototype = ListItem.prototype;

ListItemPrototype.next = null;

ListItemPrototype.prev = null;

ListItemPrototype.list = null;

/**
 * Detaches the item operated on from its parent list.
 * @name ListItem#detach
 * @returns {ListItem} - The item operated on.
 */
ListItemPrototype.detach = function () {
    // Cache self, the parent list, and the previous and next items.
    var self = this,
        list = self.list,
        prev = self.prev,
        next = self.next;

    // If the item is already detached, return self.
    if (!list) {
        return self;
    }

    // If self is the last item in the parent list, link the lists last item
    // to the previous item.
    if (list.tail === self) {
        list.tail = prev;
    }

    // If self is the first item in the parent list, link the lists first item
    // to the next item.
    if (list.head === self) {
        list.head = next;
    }

    // If both the last and first items in the parent list are the same,
    // remove the link to the last item.
    if (list.tail === list.head) {
        list.tail = null;
    }

    // If a previous item exists, link its next item to selfs next item.
    if (prev) {
        prev.next = next;
    }

    // If a next item exists, link its previous item to selfs previous item.
    if (next) {
        next.prev = prev;
    }

    // Remove links from self to both the next and previous items, and to the
    // parent list.
    self.prev = self.next = self.list = null;

    // Return self.
    return self;
};

/**
 * Prepends the given item *before* the item operated on.
 * @name ListItem#prepend
 * @param {ListItem} item - The item to prepend.
 * @returns {ListItem} - The item operated on, or false when that item is not
 * attached.
 */
ListItemPrototype.prepend = function (item) {
    if (!item || !item.append || !item.prepend || !item.detach) {
        throw new Error(errorMessage + 'Item#prepend`.');
    }

    // Cache self, the parent list, and the previous item.
    var self = this,
        list = self.list,
        prev = self.prev;

    // If self is detached, return false.
    if (!list) {
        return false;
    }

    // Detach the prependee.
    item.detach();

    // If self has a previous item...
    if (prev) {
        // ...link the prependees previous item, to selfs previous item.
        item.prev = prev;

        // ...link the previous items next item, to self.
        prev.next = item;
    }

    // Set the prependees next item to self.
    item.next = self;

    // Set the prependees parent list to selfs parent list.
    item.list = list;

    // Set the previous item of self to the prependee.
    self.prev = item;

    // If self is the first item in the parent list, link the lists first item
    // to the prependee.
    if (self === list.head) {
        list.head = item;
    }

    // If the the parent list has no last item, link the lists last item to
    // self.
    if (!list.tail) {
        list.tail = self;
    }

    // Return the prependee.
    return item;
};

/**
 * Appends the given item *after* the item operated on.
 * @name ListItem#append
 * @param {ListItem} item - The item to append.
 * @returns {ListItem} - The item operated on, or false when that item is not
 * attached.
 */
ListItemPrototype.append = function (item) {
    // If item is falsey, return false.
    if (!item || !item.append || !item.prepend || !item.detach) {
        throw new Error(errorMessage + 'Item#append`.');
    }

    // Cache self, the parent list, and the next item.
    var self = this,
        list = self.list,
        next = self.next;

    // If self is detached, return false.
    if (!list) {
        return false;
    }

    // Detach the appendee.
    item.detach();

    // If self has a next item...
    if (next) {
        // ...link the appendees next item, to selfs next item.
        item.next = next;

        // ...link the next items previous item, to the appendee.
        next.prev = item;
    }

    // Set the appendees previous item to self.
    item.prev = self;

    // Set the appendees parent list to selfs parent list.
    item.list = list;

    // Set the next item of self to the appendee.
    self.next = item;

    // If the the parent list has no last item or if self is the parent lists
    // last item, link the lists last item to the appendee.
    if (self === list.tail || !list.tail) {
        list.tail = item;
    }

    // Return the appendee.
    return item;
};

/**
 * Expose `List`.
 */

module.exports = List;

},{}],8:[function(require,module,exports){
'use strict';

module.exports = require('./_source/linked-list.js');

},{"./_source/linked-list.js":7}],9:[function(require,module,exports){
var SCEmitter = require('sc-emitter').SCEmitter;

if (!Object.create) {
  Object.create = require('./objectcreate');
}

var SCChannel = function (name, client) {
  var self = this;
  
  SCEmitter.call(this);
  
  this.PENDING = 'pending';
  this.SUBSCRIBED = 'subscribed';
  this.UNSUBSCRIBED = 'unsubscribed';
  
  this.name = name;
  this.state = this.UNSUBSCRIBED;
  this.client = client;
};

SCChannel.prototype = Object.create(SCEmitter.prototype);

SCChannel.prototype.getState = function () {
  return this.state;
};

SCChannel.prototype.subscribe = function () {
  this.client.subscribe(this.name);
};

SCChannel.prototype.unsubscribe = function () {
  this.client.unsubscribe(this.name);
};

SCChannel.prototype.isSubscribed = function (includePending) {
  return this.client.isSubscribed(this.name, includePending);
};

SCChannel.prototype.publish = function (data, callback) {
  this.client.publish(this.name, data, callback);
};

SCChannel.prototype.watch = function (handler) {
  this.client.watch(this.name, handler);
};

SCChannel.prototype.unwatch = function (handler) {
  this.client.unwatch(this.name, handler);
};

SCChannel.prototype.watchers = function () {
  return this.client.watchers(this.name);
};

SCChannel.prototype.destroy = function () {
  this.client.destroyChannel(this.name);
};

module.exports.SCChannel = SCChannel;

},{"./objectcreate":10,"sc-emitter":11}],10:[function(require,module,exports){
arguments[4][3][0].apply(exports,arguments)
},{"dup":3}],11:[function(require,module,exports){
var Emitter = require('component-emitter');

if (!Object.create) {
  Object.create = require('./objectcreate');
}

var SCEmitter = function () {
  Emitter.call(this);
};

SCEmitter.prototype = Object.create(Emitter.prototype);

SCEmitter.prototype.emit = function (event) {
  if (event == 'error' && this.domain) {
    // Emit the error on the domain if it has one.
    // See https://github.com/joyent/node/blob/ef4344311e19a4f73c031508252b21712b22fe8a/lib/events.js#L78-85
    
    var err = arguments[1];
    
    if (!err) {
      err = new Error('Uncaught, unspecified "error" event.');
    }
    err.domainEmitter = this;
    err.domain = this.domain;
    err.domainThrown = false;
    this.domain.emit('error', err);
  }
  Emitter.prototype.emit.apply(this, arguments);
};

module.exports.SCEmitter = SCEmitter;

},{"./objectcreate":13,"component-emitter":12}],12:[function(require,module,exports){

/**
 * Expose `Emitter`.
 */

module.exports = Emitter;

/**
 * Initialize a new `Emitter`.
 *
 * @api public
 */

function Emitter(obj) {
  if (obj) return mixin(obj);
};

/**
 * Mixin the emitter properties.
 *
 * @param {Object} obj
 * @return {Object}
 * @api private
 */

function mixin(obj) {
  for (var key in Emitter.prototype) {
    obj[key] = Emitter.prototype[key];
  }
  return obj;
}

/**
 * Listen on the given `event` with `fn`.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.on =
Emitter.prototype.addEventListener = function(event, fn){
  this._callbacks = this._callbacks || {};
  (this._callbacks['$' + event] = this._callbacks['$' + event] || [])
    .push(fn);
  return this;
};

/**
 * Adds an `event` listener that will be invoked a single
 * time then automatically removed.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.once = function(event, fn){
  function on() {
    this.off(event, on);
    fn.apply(this, arguments);
  }

  on.fn = fn;
  this.on(event, on);
  return this;
};

/**
 * Remove the given callback for `event` or all
 * registered callbacks.
 *
 * @param {String} event
 * @param {Function} fn
 * @return {Emitter}
 * @api public
 */

Emitter.prototype.off =
Emitter.prototype.removeListener =
Emitter.prototype.removeAllListeners =
Emitter.prototype.removeEventListener = function(event, fn){
  this._callbacks = this._callbacks || {};

  // all
  if (0 == arguments.length) {
    this._callbacks = {};
    return this;
  }

  // specific event
  var callbacks = this._callbacks['$' + event];
  if (!callbacks) return this;

  // remove all handlers
  if (1 == arguments.length) {
    delete this._callbacks['$' + event];
    return this;
  }

  // remove specific handler
  var cb;
  for (var i = 0; i < callbacks.length; i++) {
    cb = callbacks[i];
    if (cb === fn || cb.fn === fn) {
      callbacks.splice(i, 1);
      break;
    }
  }
  return this;
};

/**
 * Emit `event` with the given args.
 *
 * @param {String} event
 * @param {Mixed} ...
 * @return {Emitter}
 */

Emitter.prototype.emit = function(event){
  this._callbacks = this._callbacks || {};
  var args = [].slice.call(arguments, 1)
    , callbacks = this._callbacks['$' + event];

  if (callbacks) {
    callbacks = callbacks.slice(0);
    for (var i = 0, len = callbacks.length; i < len; ++i) {
      callbacks[i].apply(this, args);
    }
  }

  return this;
};

/**
 * Return array of callbacks for `event`.
 *
 * @param {String} event
 * @return {Array}
 * @api public
 */

Emitter.prototype.listeners = function(event){
  this._callbacks = this._callbacks || {};
  return this._callbacks['$' + event] || [];
};

/**
 * Check if this emitter has `event` handlers.
 *
 * @param {String} event
 * @return {Boolean}
 * @api public
 */

Emitter.prototype.hasListeners = function(event){
  return !! this.listeners(event).length;
};

},{}],13:[function(require,module,exports){
arguments[4][3][0].apply(exports,arguments)
},{"dup":3}],14:[function(require,module,exports){
(function (global){
var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

module.exports.parse = function (input) {
  if (input == null) {
   return null;
  }
  var message = input.toString();
  
  try {
    return JSON.parse(message);
  } catch (err) {}
  return message;
};

var arrayBufferToBase64 = function (arraybuffer) {
  var bytes = new Uint8Array(arraybuffer);
  var len = bytes.length;
  var base64 = '';

  for (var i = 0; i < len; i += 3) {
    base64 += base64Chars[bytes[i] >> 2];
    base64 += base64Chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
    base64 += base64Chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
    base64 += base64Chars[bytes[i + 2] & 63];
  }

  if ((len % 3) === 2) {
    base64 = base64.substring(0, base64.length - 1) + '=';
  } else if (len % 3 === 1) {
    base64 = base64.substring(0, base64.length - 2) + '==';
  }

  return base64;
};

var isOwnDescendant = function (object, ancestors) {
  for (var i in