diff --git a/prebuilt/iot-gateway/node_modules/engine.io-client/lib/socket.js b/prebuilt/iot-gateway/node_modules/engine.io-client/lib/socket.js
+++ /dev/null
@@ -1,728 +0,0 @@
-/**
- * Module dependencies.
- */
-
-var transports = require('./transports');
-var Emitter = require('component-emitter');
-var debug = require('debug')('engine.io-client:socket');
-var index = require('indexof');
-var parser = require('engine.io-parser');
-var parseuri = require('parseuri');
-var parsejson = require('parsejson');
-var parseqs = require('parseqs');
-
-/**
- * Module exports.
- */
-
-module.exports = Socket;
-
-/**
- * Noop function.
- *
- * @api private
- */
-
-function noop(){}
-
-/**
- * Socket constructor.
- *
- * @param {String|Object} uri or options
- * @param {Object} options
- * @api public
- */
-
-function Socket(uri, opts){
- if (!(this instanceof Socket)) return new Socket(uri, opts);
-
- opts = opts || {};
-
- if (uri && 'object' == typeof uri) {
- opts = uri;
- uri = null;
- }
-
- if (uri) {
- uri = parseuri(uri);
- opts.hostname = uri.host;
- opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
- opts.port = uri.port;
- if (uri.query) opts.query = uri.query;
- } else if (opts.host) {
- opts.hostname = parseuri(opts.host).host;
- }
-
- this.secure = null != opts.secure ? opts.secure :
- (global.location && 'https:' == location.protocol);
-
- if (opts.hostname && !opts.port) {
- // if no port is specified manually, use the protocol default
- opts.port = this.secure ? '443' : '80';
- }
-
- this.agent = opts.agent || false;
- this.hostname = opts.hostname ||
- (global.location ? location.hostname : 'localhost');
- this.port = opts.port || (global.location && location.port ?
- location.port :
- (this.secure ? 443 : 80));
- this.query = opts.query || {};
- if ('string' == typeof this.query) this.query = parseqs.decode(this.query);
- this.upgrade = false !== opts.upgrade;
- this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
- this.forceJSONP = !!opts.forceJSONP;
- this.jsonp = false !== opts.jsonp;
- this.forceBase64 = !!opts.forceBase64;
- this.enablesXDR = !!opts.enablesXDR;
- this.timestampParam = opts.timestampParam || 't';
- this.timestampRequests = opts.timestampRequests;
- this.transports = opts.transports || ['polling', 'websocket'];
- this.readyState = '';
- this.writeBuffer = [];
- this.policyPort = opts.policyPort || 843;
- this.rememberUpgrade = opts.rememberUpgrade || false;
- this.binaryType = null;
- this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
- this.perMessageDeflate = false !== opts.perMessageDeflate ? (opts.perMessageDeflate || {}) : false;
-
- if (true === this.perMessageDeflate) this.perMessageDeflate = {};
- if (this.perMessageDeflate && null == this.perMessageDeflate.threshold) {
- this.perMessageDeflate.threshold = 1024;
- }
-
- // SSL options for Node.js client
- this.pfx = opts.pfx || null;
- this.key = opts.key || null;
- this.passphrase = opts.passphrase || null;
- this.cert = opts.cert || null;
- this.ca = opts.ca || null;
- this.ciphers = opts.ciphers || null;
- this.rejectUnauthorized = opts.rejectUnauthorized === undefined ? null : opts.rejectUnauthorized;
-
- // other options for Node.js client
- var freeGlobal = typeof global == 'object' && global;
- if (freeGlobal.global === freeGlobal) {
- if (opts.extraHeaders && Object.keys(opts.extraHeaders).length > 0) {
- this.extraHeaders = opts.extraHeaders;
- }
- }
-
- this.open();
-}
-
-Socket.priorWebsocketSuccess = false;
-
-/**
- * Mix in `Emitter`.
- */
-
-Emitter(Socket.prototype);
-
-/**
- * Protocol version.
- *
- * @api public
- */
-
-Socket.protocol = parser.protocol; // this is an int
-
-/**
- * Expose deps for legacy compatibility
- * and standalone browser access.
- */
-
-Socket.Socket = Socket;
-Socket.Transport = require('./transport');
-Socket.transports = require('./transports');
-Socket.parser = require('engine.io-parser');
-
-/**
- * Creates transport of the given type.
- *
- * @param {String} transport name
- * @return {Transport}
- * @api private
- */
-
-Socket.prototype.createTransport = function (name) {
- debug('creating transport "%s"', name);
- var query = clone(this.query);
-
- // append engine.io protocol identifier
- query.EIO = parser.protocol;
-
- // transport name
- query.transport = name;
-
- // session id if we already have one
- if (this.id) query.sid = this.id;
-
- var transport = new transports[name]({
- agent: this.agent,
- hostname: this.hostname,
- port: this.port,
- secure: this.secure,
- path: this.path,
- query: query,
- forceJSONP: this.forceJSONP,
- jsonp: this.jsonp,
- forceBase64: this.forceBase64,
- enablesXDR: this.enablesXDR,
- timestampRequests: this.timestampRequests,
- timestampParam: this.timestampParam,
- policyPort: this.policyPort,
- socket: this,
- pfx: this.pfx,
- key: this.key,
- passphrase: this.passphrase,
- cert: this.cert,
- ca: this.ca,
- ciphers: this.ciphers,
- rejectUnauthorized: this.rejectUnauthorized,
- perMessageDeflate: this.perMessageDeflate,
- extraHeaders: this.extraHeaders
- });
-
- return transport;
-};
-
-function clone (obj) {
- var o = {};
- for (var i in obj) {
- if (obj.hasOwnProperty(i)) {
- o[i] = obj[i];
- }
- }
- return o;
-}
-
-/**
- * Initializes transport to use and starts probe.
- *
- * @api private
- */
-Socket.prototype.open = function () {
- var transport;
- if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
- transport = 'websocket';
- } else if (0 === this.transports.length) {
- // Emit error on next tick so it can be listened to
- var self = this;
- setTimeout(function() {
- self.emit('error', 'No transports available');
- }, 0);
- return;
- } else {
- transport = this.transports[0];
- }
- this.readyState = 'opening';
-
- // Retry with the next transport if the transport is disabled (jsonp: false)
- try {
- transport = this.createTransport(transport);
- } catch (e) {
- this.transports.shift();
- this.open();
- return;
- }
-
- transport.open();
- this.setTransport(transport);
-};
-
-/**
- * Sets the current transport. Disables the existing one (if any).
- *
- * @api private
- */
-
-Socket.prototype.setTransport = function(transport){
- debug('setting transport %s', transport.name);
- var self = this;
-
- if (this.transport) {
- debug('clearing existing transport %s', this.transport.name);
- this.transport.removeAllListeners();
- }
-
- // set up transport
- this.transport = transport;
-
- // set up transport listeners
- transport
- .on('drain', function(){
- self.onDrain();
- })
- .on('packet', function(packet){
- self.onPacket(packet);
- })
- .on('error', function(e){
- self.onError(e);
- })
- .on('close', function(){
- self.onClose('transport close');
- });
-};
-
-/**
- * Probes a transport.
- *
- * @param {String} transport name
- * @api private
- */
-
-Socket.prototype.probe = function (name) {
- debug('probing transport "%s"', name);
- var transport = this.createTransport(name, { probe: 1 })
- , failed = false
- , self = this;
-
- Socket.priorWebsocketSuccess = false;
-
- function onTransportOpen(){
- if (self.onlyBinaryUpgrades) {
- var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
- failed = failed || upgradeLosesBinary;
- }
- if (failed) return;
-
- debug('probe transport "%s" opened', name);
- transport.send([{ type: 'ping', data: 'probe' }]);
- transport.once('packet', function (msg) {
- if (failed) return;
- if ('pong' == msg.type && 'probe' == msg.data) {
- debug('probe transport "%s" pong', name);
- self.upgrading = true;
- self.emit('upgrading', transport);
- if (!transport) return;
- Socket.priorWebsocketSuccess = 'websocket' == transport.name;
-
- debug('pausing current transport "%s"', self.transport.name);
- self.transport.pause(function () {
- if (failed) return;
- if ('closed' == self.readyState) return;
- debug('changing transport and sending upgrade packet');
-
- cleanup();
-
- self.setTransport(transport);
- transport.send([{ type: 'upgrade' }]);
- self.emit('upgrade', transport);
- transport = null;
- self.upgrading = false;
- self.flush();
- });
- } else {
- debug('probe transport "%s" failed', name);
- var err = new Error('probe error');
- err.transport = transport.name;
- self.emit('upgradeError', err);
- }
- });
- }
-
- function freezeTransport() {
- if (failed) return;
-
- // Any callback called by transport should be ignored since now
- failed = true;
-
- cleanup();
-
- transport.close();
- transport = null;
- }
-
- //Handle any error that happens while probing
- function onerror(err) {
- var error = new Error('probe error: ' + err);
- error.transport = transport.name;
-
- freezeTransport();
-
- debug('probe transport "%s" failed because of error: %s', name, err);
-
- self.emit('upgradeError', error);
- }
-
- function onTransportClose(){
- onerror("transport closed");
- }
-
- //When the socket is closed while we're probing
- function onclose(){
- onerror("socket closed");
- }
-
- //When the socket is upgraded while we're probing
- function onupgrade(to){
- if (transport && to.name != transport.name) {
- debug('"%s" works - aborting "%s"', to.name, transport.name);
- freezeTransport();
- }
- }
-
- //Remove all listeners on the transport and on self
- function cleanup(){
- transport.removeListener('open', onTransportOpen);
- transport.removeListener('error', onerror);
- transport.removeListener('close', onTransportClose);
- self.removeListener('close', onclose);
- self.removeListener('upgrading', onupgrade);
- }
-
- transport.once('open', onTransportOpen);
- transport.once('error', onerror);
- transport.once('close', onTransportClose);
-
- this.once('close', onclose);
- this.once('upgrading', onupgrade);
-
- transport.open();
-
-};
-
-/**
- * Called when connection is deemed open.
- *
- * @api public
- */
-
-Socket.prototype.onOpen = function () {
- debug('socket open');
- this.readyState = 'open';
- Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
- this.emit('open');
- this.flush();
-
- // we check for `readyState` in case an `open`
- // listener already closed the socket
- if ('open' == this.readyState && this.upgrade && this.transport.pause) {
- debug('starting upgrade probes');
- for (var i = 0, l = this.upgrades.length; i < l; i++) {
- this.probe(this.upgrades[i]);
- }
- }
-};
-
-/**
- * Handles a packet.
- *
- * @api private
- */
-
-Socket.prototype.onPacket = function (packet) {
- if ('opening' == this.readyState || 'open' == this.readyState) {
- debug('socket receive: type "%s", data "%s"', packet.type, packet.data);
-
- this.emit('packet', packet);
-
- // Socket is live - any packet counts
- this.emit('heartbeat');
-
- switch (packet.type) {
- case 'open':
- this.onHandshake(parsejson(packet.data));
- break;
-
- case 'pong':
- this.setPing();
- this.emit('pong');
- break;
-
- case 'error':
- var err = new Error('server error');
- err.code = packet.data;
- this.onError(err);
- break;
-
- case 'message':
- this.emit('data', packet.data);
- this.emit('message', packet.data);
- break;
- }
- } else {
- debug('packet received with socket readyState "%s"', this.readyState);
- }
-};
-
-/**
- * Called upon handshake completion.
- *
- * @param {Object} handshake obj
- * @api private
- */
-
-Socket.prototype.onHandshake = function (data) {
- this.emit('handshake', data);
- this.id = data.sid;
- this.transport.query.sid = data.sid;
- this.upgrades = this.filterUpgrades(data.upgrades);
- this.pingInterval = data.pingInterval;
- this.pingTimeout = data.pingTimeout;
- this.onOpen();
- // In case open handler closes socket
- if ('closed' == this.readyState) return;
- this.setPing();
-
- // Prolong liveness of socket on heartbeat
- this.removeListener('heartbeat', this.onHeartbeat);
- this.on('heartbeat', this.onHeartbeat);
-};
-
-/**
- * Resets ping timeout.
- *
- * @api private
- */
-
-Socket.prototype.onHeartbeat = function (timeout) {
- clearTimeout(this.pingTimeoutTimer);
- var self = this;
- self.pingTimeoutTimer = setTimeout(function () {
- if ('closed' == self.readyState) return;
- self.onClose('ping timeout');
- }, timeout || (self.pingInterval + self.pingTimeout));
-};
-
-/**
- * Pings server every `this.pingInterval` and expects response
- * within `this.pingTimeout` or closes connection.
- *
- * @api private
- */
-
-Socket.prototype.setPing = function () {
- var self = this;
- clearTimeout(self.pingIntervalTimer);
- self.pingIntervalTimer = setTimeout(function () {
- debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
- self.ping();
- self.onHeartbeat(self.pingTimeout);
- }, self.pingInterval);
-};
-
-/**
-* Sends a ping packet.
-*
-* @api private
-*/
-
-Socket.prototype.ping = function () {
- var self = this;
- this.sendPacket('ping', function(){
- self.emit('ping');
- });
-};
-
-/**
- * Called on `drain` event
- *
- * @api private
- */
-
-Socket.prototype.onDrain = function() {
- this.writeBuffer.splice(0, this.prevBufferLen);
-
- // setting prevBufferLen = 0 is very important
- // for example, when upgrading, upgrade packet is sent over,
- // and a nonzero prevBufferLen could cause problems on `drain`
- this.prevBufferLen = 0;
-
- if (0 === this.writeBuffer.length) {
- this.emit('drain');
- } else {
- this.flush();
- }
-};
-
-/**
- * Flush write buffers.
- *
- * @api private
- */
-
-Socket.prototype.flush = function () {
- if ('closed' != this.readyState && this.transport.writable &&
- !this.upgrading && this.writeBuffer.length) {
- debug('flushing %d packets in socket', this.writeBuffer.length);
- this.transport.send(this.writeBuffer);
- // keep track of current length of writeBuffer
- // splice writeBuffer and callbackBuffer on `drain`
- this.prevBufferLen = this.writeBuffer.length;
- this.emit('flush');
- }
-};
-
-/**
- * Sends a message.
- *
- * @param {String} message.
- * @param {Function} callback function.
- * @param {Object} options.
- * @return {Socket} for chaining.
- * @api public
- */
-
-Socket.prototype.write =
-Socket.prototype.send = function (msg, options, fn) {
- this.sendPacket('message', msg, options, fn);
- return this;
-};
-
-/**
- * Sends a packet.
- *
- * @param {String} packet type.
- * @param {String} data.
- * @param {Object} options.
- * @param {Function} callback function.
- * @api private
- */
-
-Socket.prototype.sendPacket = function (type, data, options, fn) {
- if('function' == typeof data) {
- fn = data;
- data = undefined;
- }
-
- if ('function' == typeof options) {
- fn = options;
- options = null;
- }
-
- if ('closing' == this.readyState || 'closed' == this.readyState) {
- return;
- }
-
- options = options || {};
- options.compress = false !== options.compress;
-
- var packet = {
- type: type,
- data: data,
- options: options
- };
- this.emit('packetCreate', packet);
- this.writeBuffer.push(packet);
- if (fn) this.once('flush', fn);
- this.flush();
-};
-
-/**
- * Closes the connection.
- *
- * @api private
- */
-
-Socket.prototype.close = function () {
- if ('opening' == this.readyState || 'open' == this.readyState) {
- this.readyState = 'closing';
-
- var self = this;
-
- if (this.writeBuffer.length) {
- this.once('drain', function() {
- if (this.upgrading) {
- waitForUpgrade();
- } else {
- close();
- }
- });
- } else if (this.upgrading) {
- waitForUpgrade();
- } else {
- close();
- }
- }
-
- function close() {
- self.onClose('forced close');
- debug('socket closing - telling transport to close');
- self.transport.close();
- }
-
- function cleanupAndClose() {
- self.removeListener('upgrade', cleanupAndClose);
- self.removeListener('upgradeError', cleanupAndClose);
- close();
- }
-
- function waitForUpgrade() {
- // wait for upgrade to finish since we can't send packets while pausing a transport
- self.once('upgrade', cleanupAndClose);
- self.once('upgradeError', cleanupAndClose);
- }
-
- return this;
-};
-
-/**
- * Called upon transport error
- *
- * @api private
- */
-
-Socket.prototype.onError = function (err) {
- debug('socket error %j', err);
- Socket.priorWebsocketSuccess = false;
- this.emit('error', err);
- this.onClose('transport error', err);
-};
-
-/**
- * Called upon transport close.
- *
- * @api private
- */
-
-Socket.prototype.onClose = function (reason, desc) {
- if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
- debug('socket close with reason: "%s"', reason);
- var self = this;
-
- // clear timers
- clearTimeout(this.pingIntervalTimer);
- clearTimeout(this.pingTimeoutTimer);
-
- // stop event from firing again for transport
- this.transport.removeAllListeners('close');
-
- // ensure transport won't stay open
- this.transport.close();
-
- // ignore further transport communication
- this.transport.removeAllListeners();
-
- // set ready state
- this.readyState = 'closed';
-
- // clear session id
- this.id = null;
-
- // emit close event
- this.emit('close', reason, desc);
-
- // clean buffers after, so users can still
- // grab the buffers on `close` event
- self.writeBuffer = [];
- self.prevBufferLen = 0;
- }
-};
-
-/**
- * Filters upgrades, returning only those matching client transports.
- *
- * @param {Array} server upgrades
- * @api private
- *
- */
-
-Socket.prototype.filterUpgrades = function (upgrades) {
- var filteredUpgrades = [];
- for (var i = 0, j = upgrades.length; i<j; i++) {
- if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
- }
- return filteredUpgrades;
-};