/*******************************************************************************
 * Javascript microgear library for browser
 * published by netpie.io
 * 
 * The library depends on the following opensource projects
 *  - Eclipse Paho JS library
 *       https://www.eclipse.org/paho/clients/js/
 *  - EventEmitter
 *       https://github.com/benjreinhart/node-event-emitter
 *  - Oauth 1.0a
 *       https://github.com/ddo/oauth-1.0a
 *  - CryptoJS     
 *       https://code.google.com/p/crypto-js/
 *  - Store.js
 *       https://github.com/marcuswestin/store.js
 *     
 *******************************************************************************/

/**
 * General API Endpoint
 * Microgear-HTML5 communicates over TLS by default
 * If you want to disable TLS, set USETLS to false
 */
var VERSION = '$_VERSION';
var GEARAPIADDRESS = 'ga.netpie.io';
var GEARAPIPORT = '8080';
var GEARAPISECUREPORT = '8081';
var GBWSPORT = '8083';
var GBWSSPORT = '8084';
var USETLS = true;

/**
 * Microgear API version
 */
var MGREV = 'WJS1b';

/**
 * Constants
 */
var MINTOKDELAYTIME = 100;
var MAXTOKDELAYTIME = 30000;
var DEBUGMODE = false;
var MONLOOPINTERVAL = 1000;
var RETRYCONNECTIONINTERVAL = 5000;
var MESSAGEBUFFERSIZE = 20;

/**
 * Variables
 */
var toktime = MINTOKDELAYTIME;
var GEARAUTH = GEARAPIADDRESS;

/*
Store.js
Copyright (c) 2010-2016 Marcus Westin
Source: https://github.com/marcuswestin/store.js
*/
var storejs = (function() {
	var store = {},
		win = (typeof window != 'undefined' ? window : global),
		doc = win.document,
		localStorageName = 'localStorage',
		scriptTag = 'script',
		storage

	store.disabled = false
	store.version = '1.3.20'
	store.set = function(key, value) {}
	store.get = function(key, defaultVal) {}
	store.has = function(key) { return store.get(key) !== undefined }
	store.remove = function(key) {}
	store.clear = function() {}
	store.transact = function(key, defaultVal, transactionFn) {
		if (transactionFn == null) {
			transactionFn = defaultVal
			defaultVal = null
		}
		if (defaultVal == null) {
			defaultVal = {}
		}
		var val = store.get(key, defaultVal)
		transactionFn(val)
		store.set(key, val)
	}
	store.getAll = function() {}
	store.forEach = function() {}

	store.serialize = function(value) {
		return JSON.stringify(value)
	}
	store.deserialize = function(value) {
		if (typeof value != 'string') { return undefined }
		try { return JSON.parse(value) }
		catch(e) { return value || undefined }
	}

	// Functions to encapsulate questionable FireFox 3.6.13 behavior
	// when about.config::dom.storage.enabled === false
	// See https://github.com/marcuswestin/store.js/issues#issue/13
	function isLocalStorageNameSupported() {
		try { return (localStorageName in win && win[localStorageName]) }
		catch(err) { return false }
	}

	if (isLocalStorageNameSupported()) {
		storage = win[localStorageName]
		store.set = function(key, val) {
			if (val === undefined) { return store.remove(key) }
			storage.setItem(key, store.serialize(val))
			return val
		}
		store.get = function(key, defaultVal) {
			var val = store.deserialize(storage.getItem(key))
			return (val === undefined ? defaultVal : val)
		}
		store.remove = function(key) { storage.removeItem(key) }
		store.clear = function() { storage.clear() }
		store.getAll = function() {
			var ret = {}
			store.forEach(function(key, val) {
				ret[key] = val
			})
			return ret
		}
		store.forEach = function(callback) {
			for (var i=0; i<storage.length; i++) {
				var key = storage.key(i)
				callback(key, store.get(key))
			}
		}
	} else if (doc && doc.documentElement.addBehavior) {
		var storageOwner,
			storageContainer
		// Since #userData storage applies only to specific paths, we need to
		// somehow link our data to a specific path.  We choose /favicon.ico
		// as a pretty safe option, since all browsers already make a request to
		// this URL anyway and being a 404 will not hurt us here.  We wrap an
		// iframe pointing to the favicon in an ActiveXObject(htmlfile) object
		// (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
		// since the iframe access rules appear to allow direct access and
		// manipulation of the document element, even for a 404 page.  This
		// document can be used instead of the current document (which would
		// have been limited to the current path) to perform #userData storage.
		try {
			storageContainer = new ActiveXObject('htmlfile')
			storageContainer.open()
			storageContainer.write('<'+scriptTag+'>document.w=window</'+scriptTag+'><iframe src="/favicon.ico"></iframe>')
			storageContainer.close()
			storageOwner = storageContainer.w.frames[0].document
			storage = storageOwner.createElement('div')
		} catch(e) {
			// somehow ActiveXObject instantiation failed (perhaps some special
			// security settings or otherwse), fall back to per-path storage
			storage = doc.createElement('div')
			storageOwner = doc.body
		}
		var withIEStorage = function(storeFunction) {
			return function() {
				var args = Array.prototype.slice.call(arguments, 0)
				args.unshift(storage)
				// See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
				// and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
				storageOwner.appendChild(storage)
				storage.addBehavior('#default#userData')
				storage.load(localStorageName)
				var result = storeFunction.apply(store, args)
				storageOwner.removeChild(storage)
				return result
			}
		}

		// In IE7, keys cannot start with a digit or contain certain chars.
		// See https://github.com/marcuswestin/store.js/issues/40
		// See https://github.com/marcuswestin/store.js/issues/83
		var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g")
		var ieKeyFix = function(key) {
			return key.replace(/^d/, '___$&').replace(forbiddenCharsRegex, '___')
		}
		store.set = withIEStorage(function(storage, key, val) {
			key = ieKeyFix(key)
			if (val === undefined) { return store.remove(key) }
			storage.setAttribute(key, store.serialize(val))
			storage.save(localStorageName)
			return val
		})
		store.get = withIEStorage(function(storage, key, defaultVal) {
			key = ieKeyFix(key)
			var val = store.deserialize(storage.getAttribute(key))
			return (val === undefined ? defaultVal : val)
		})
		store.remove = withIEStorage(function(storage, key) {
			key = ieKeyFix(key)
			storage.removeAttribute(key)
			storage.save(localStorageName)
		})
		store.clear = withIEStorage(function(storage) {
			var attributes = storage.XMLDocument.documentElement.attributes
			storage.load(localStorageName)
			for (var i=attributes.length-1; i>=0; i--) {
				storage.removeAttribute(attributes[i].name)
			}
			storage.save(localStorageName)
		})
		store.getAll = function(storage) {
			var ret = {}
			store.forEach(function(key, val) {
				ret[key] = val
			})
			return ret
		}
		store.forEach = withIEStorage(function(storage, callback) {
			var attributes = storage.XMLDocument.documentElement.attributes
			for (var i=0, attr; attr=attributes[i]; ++i) {
				callback(attr.name, store.deserialize(storage.getAttribute(attr.name)))
			}
		})
	}

	try {
		var testKey = '__storejs__'
		store.set(testKey, testKey)
		if (store.get(testKey) != testKey) { store.disabled = true }
		store.remove(testKey)
	} catch(e) {
		store.disabled = true
	}
	store.enabled = !store.disabled
	
	return store
}());

console.log(storejs.enabled);

var _localStorage = {
	setItem : function(key, value) {
		if (storejs.enabled) {
			storejs.set(key, value);
		}
	},
	getItem : function() {
		if (storejs.enabled) {
			return storejs.get(key);
		}
	},
	removeItem : function() {
		if (storejs.enabled) {
			storejs.remove(key);
		}
	},
	getAllItems : function() {
		return storejs.getAll();
	}
}

/*******************************************************************************
 * Copyright (c) 2013 IBM Corp.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v1.0 which accompany this distribution. 
 *
 * The Eclipse Public License is available at 
 *    http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 *   http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *    Andrew Banks - initial API and implementation and initial documentation
 *******************************************************************************/

// Only expose a single object name in the global namespace.
// Everything must go through this module. Global Paho.MQTT module
// only has a single public function, client, which returns
// a Paho.MQTT client object given connection details.

if (typeof Paho === "undefined") {
	Paho = {};
}

Paho.MQTT = (function (global) {

	// Private variables below, these are only visible inside the function closure
	// which is used to define the module. 

	var version = "1.0.1";
	var buildLevel = "2014-11-18T11:57:44Z";
	
	/** 
	 * Unique message type identifiers, with associated
	 * associated integer values.
	 * @private 
	 */
	var MESSAGE_TYPE = {
		CONNECT: 1, 
		CONNACK: 2, 
		PUBLISH: 3,
		PUBACK: 4,
		PUBREC: 5, 
		PUBREL: 6,
		PUBCOMP: 7,
		SUBSCRIBE: 8,
		SUBACK: 9,
		UNSUBSCRIBE: 10,
		UNSUBACK: 11,
		PINGREQ: 12,
		PINGRESP: 13,
		DISCONNECT: 14
	};
	
	// Collection of utility methods used to simplify module code 
	// and promote the DRY pattern.  

	/**
	 * Validate an object's parameter names to ensure they 
	 * match a list of expected variables name for this option
	 * type. Used to ensure option object passed into the API don't
	 * contain erroneous parameters.
	 * @param {Object} obj - User options object
	 * @param {Object} keys - valid keys and types that may exist in obj. 
	 * @throws {Error} Invalid option parameter found. 
	 * @private 
	 */
	var validate = function(obj, keys) {
		for (var key in obj) {
			if (obj.hasOwnProperty(key)) {       		
				if (keys.hasOwnProperty(key)) {
					if (typeof obj[key] !== keys[key])
					   throw new Error(format(ERROR.INVALID_TYPE, [typeof obj[key], key]));
				} else {	
					var errorStr = "Unknown property, " + key + ". Valid properties are:";
					for (var key in keys)
						if (keys.hasOwnProperty(key))
							errorStr = errorStr+" "+key;
					throw new Error(errorStr);
				}
			}
		}
	};

	/**
	 * Return a new function which runs the user function bound
	 * to a fixed scope. 
	 * @param {function} User function
	 * @param {object} Function scope  
	 * @return {function} User function bound to another scope
	 * @private 
	 */
	var scope = function (f, scope) {
		return function () {
			return f.apply(scope, arguments);
		};
	};
	
	/** 
	 * Unique message type identifiers, with associated
	 * associated integer values.
	 * @private 
	 */
	var ERROR = {
		OK: {code:0, text:"AMQJSC0000I OK."},
		CONNECT_TIMEOUT: {code:1, text:"AMQJSC0001E Connect timed out."},
		SUBSCRIBE_TIMEOUT: {code:2, text:"AMQJS0002E Subscribe timed out."}, 
		UNSUBSCRIBE_TIMEOUT: {code:3, text:"AMQJS0003E Unsubscribe timed out."},
		PING_TIMEOUT: {code:4, text:"AMQJS0004E Ping timed out."},
		INTERNAL_ERROR: {code:5, text:"AMQJS0005E Internal error. Error Message: {0}, Stack trace: {1}"},
		CONNACK_RETURNCODE: {code:6, text:"AMQJS0006E Bad Connack return code:{0} {1}."},
		SOCKET_ERROR: {code:7, text:"AMQJS0007E Socket error:{0}."},
		SOCKET_CLOSE: {code:8, text:"AMQJS0008I Socket closed."},
		MALFORMED_UTF: {code:9, text:"AMQJS0009E Malformed UTF data:{0} {1} {2}."},
		UNSUPPORTED: {code:10, text:"AMQJS0010E {0} is not supported by this browser."},
		INVALID_STATE: {code:11, text:"AMQJS0011E Invalid state {0}."},
		INVALID_TYPE: {code:12, text:"AMQJS0012E Invalid type {0} for {1}."},
		INVALID_ARGUMENT: {code:13, text:"AMQJS0013E Invalid argument {0} for {1}."},
		UNSUPPORTED_OPERATION: {code:14, text:"AMQJS0014E Unsupported operation."},
		INVALID_STORED_DATA: {code:15, text:"AMQJS0015E Invalid data in local storage key={0} value={1}."},
		INVALID_MQTT_MESSAGE_TYPE: {code:16, text:"AMQJS0016E Invalid MQTT message type {0}."},
		MALFORMED_UNICODE: {code:17, text:"AMQJS0017E Malformed Unicode string:{0} {1}."},
	};
	
	/** CONNACK RC Meaning. */
	var CONNACK_RC = {
		0:"Connection Accepted",
		1:"Connection Refused: unacceptable protocol version",
		2:"Connection Refused: identifier rejected",
		3:"Connection Refused: server unavailable",
		4:"Connection Refused: bad user name or password",
		5:"Connection Refused: not authorized"
	};

	/**
	 * Format an error message text.
	 * @private
	 * @param {error} ERROR.KEY value above.
	 * @param {substitutions} [array] substituted into the text.
	 * @return the text with the substitutions made.
	 */
	var format = function(error, substitutions) {
		var text = error.text;
		if (substitutions) {
		  var field,start;
		  for (var i=0; i<substitutions.length; i++) {
			field = "{"+i+"}";
			start = text.indexOf(field);
			if(start > 0) {
				var part1 = text.substring(0,start);
				var part2 = text.substring(start+field.length);
				text = part1+substitutions[i]+part2;
			}
		  }
		}
		return text;
	};
	
	//MQTT protocol and version          6    M    Q    I    s    d    p    3
	var MqttProtoIdentifierv3 = [0x00,0x06,0x4d,0x51,0x49,0x73,0x64,0x70,0x03];
	//MQTT proto/version for 311         4    M    Q    T    T    4
	var MqttProtoIdentifierv4 = [0x00,0x04,0x4d,0x51,0x54,0x54,0x04];
	
	/**
	 * Construct an MQTT wire protocol message.
	 * @param type MQTT packet type.
	 * @param options optional wire message attributes.
	 * 
	 * Optional properties
	 * 
	 * messageIdentifier: message ID in the range [0..65535]
	 * payloadMessage:	Application Message - PUBLISH only
	 * connectStrings:	array of 0 or more Strings to be put into the CONNECT payload
	 * topics:			array of strings (SUBSCRIBE, UNSUBSCRIBE)
	 * requestQoS:		array of QoS values [0..2]
	 *  
	 * "Flag" properties 
	 * cleanSession:	true if present / false if absent (CONNECT)
	 * willMessage:  	true if present / false if absent (CONNECT)
	 * isRetained:		true if present / false if absent (CONNECT)
	 * userName:		true if present / false if absent (CONNECT)
	 * password:		true if present / false if absent (CONNECT)
	 * keepAliveInterval:	integer [0..65535]  (CONNECT)
	 *
	 * @private
	 * @ignore
	 */
	var WireMessage = function (type, options) { 	
		this.type = type;
		for (var name in options) {
			if (options.hasOwnProperty(name)) {
				this[name] = options[name];
			}
		}
	};
	
	WireMessage.prototype.encode = function() {
		// Compute the first byte of the fixed header
		var first = ((this.type & 0x0f) << 4);
		
		/*
		 * Now calculate the length of the variable header + payload by adding up the lengths
		 * of all the component parts
		 */

		var remLength = 0;
		var topicStrLength = new Array();
		var destinationNameLength = 0;
		
		// if the message contains a messageIdentifier then we need two bytes for that
		if (this.messageIdentifier != undefined)
			remLength += 2;

		switch(this.type) {
			// If this a Connect then we need to include 12 bytes for its header
			case MESSAGE_TYPE.CONNECT:
				switch(this.mqttVersion) {
					case 3:
						remLength += MqttProtoIdentifierv3.length + 3;
						break;
					case 4:
						remLength += MqttProtoIdentifierv4.length + 3;
						break;
				}

				remLength += UTF8Length(this.clientId) + 2;
				if (this.willMessage != undefined) {
					remLength += UTF8Length(this.willMessage.destinationName) + 2;
					// Will message is always a string, sent as UTF-8 characters with a preceding length.
					var willMessagePayloadBytes = this.willMessage.payloadBytes;
					if (!(willMessagePayloadBytes instanceof Uint8Array))
						willMessagePayloadBytes = new Uint8Array(payloadBytes);
					remLength += willMessagePayloadBytes.byteLength +2;
				}
				if (this.userName != undefined)
					remLength += UTF8Length(this.userName) + 2;	
				if (this.password != undefined)
					remLength += UTF8Length(this.password) + 2;
			break;

			// Subscribe, Unsubscribe can both contain topic strings
			case MESSAGE_TYPE.SUBSCRIBE:	        	
				first |= 0x02; // Qos = 1;
				for ( var i = 0; i < this.topics.length; i++) {
					topicStrLength[i] = UTF8Length(this.topics[i]);
					remLength += topicStrLength[i] + 2;
				}
				remLength += this.requestedQos.length; // 1 byte for each topic's Qos
				// QoS on Subscribe only
				break;

			case MESSAGE_TYPE.UNSUBSCRIBE:
				first |= 0x02; // Qos = 1;
				for ( var i = 0; i < this.topics.length; i++) {
					topicStrLength[i] = UTF8Length(this.topics[i]);
					remLength += topicStrLength[i] + 2;
				}
				break;

			case MESSAGE_TYPE.PUBREL:
				first |= 0x02; // Qos = 1;
				break;

			case MESSAGE_TYPE.PUBLISH:
				if (this.payloadMessage.duplicate) first |= 0x08;
				first  = first |= (this.payloadMessage.qos << 1);
				if (this.payloadMessage.retained) first |= 0x01;
				destinationNameLength = UTF8Length(this.payloadMessage.destinationName);
				remLength += destinationNameLength + 2;	   
				var payloadBytes = this.payloadMessage.payloadBytes;
				remLength += payloadBytes.byteLength;  
				if (payloadBytes instanceof ArrayBuffer)
					payloadBytes = new Uint8Array(payloadBytes);
				else if (!(payloadBytes instanceof Uint8Array))
					payloadBytes = new Uint8Array(payloadBytes.buffer);
				break;

			case MESSAGE_TYPE.DISCONNECT:
				break;

			default:
				;
		}

		// Now we can allocate a buffer for the message

		var mbi = encodeMBI(remLength);  // Convert the length to MQTT MBI format
		var pos = mbi.length + 1;        // Offset of start of variable header
		var buffer = new ArrayBuffer(remLength + pos);
		var byteStream = new Uint8Array(buffer);    // view it as a sequence of bytes

		//Write the fixed header into the buffer
		byteStream[0] = first;
		byteStream.set(mbi,1);

		// If this is a PUBLISH then the variable header starts with a topic
		if (this.type == MESSAGE_TYPE.PUBLISH)
			pos = writeString(this.payloadMessage.destinationName, destinationNameLength, byteStream, pos);
		// If this is a CONNECT then the variable header contains the protocol name/version, flags and keepalive time
		
		else if (this.type == MESSAGE_TYPE.CONNECT) {
			switch (this.mqttVersion) {
				case 3:
					byteStream.set(MqttProtoIdentifierv3, pos);
					pos += MqttProtoIdentifierv3.length;
					break;
				case 4:
					byteStream.set(MqttProtoIdentifierv4, pos);
					pos += MqttProtoIdentifierv4.length;
					break;
			}
			var connectFlags = 0;
			if (this.cleanSession) 
				connectFlags = 0x02;
			if (this.willMessage != undefined ) {
				connectFlags |= 0x04;
				connectFlags |= (this.willMessage.qos<<3);
				if (this.willMessage.retained) {
					connectFlags |= 0x20;
				}
			}
			if (this.userName != undefined)
				connectFlags |= 0x80;
			if (this.password != undefined)
				connectFlags |= 0x40;
			byteStream[pos++] = connectFlags; 
			pos = writeUint16 (this.keepAliveInterval, byteStream, pos);
		}

		// Output the messageIdentifier - if there is one
		if (this.messageIdentifier != undefined)
			pos = writeUint16 (this.messageIdentifier, byteStream, pos);

		switch(this.type) {
			case MESSAGE_TYPE.CONNECT:
				pos = writeString(this.clientId, UTF8Length(this.clientId), byteStream, pos); 
				if (this.willMessage != undefined) {
					pos = writeString(this.willMessage.destinationName, UTF8Length(this.willMessage.destinationName), byteStream, pos);
					pos = writeUint16(willMessagePayloadBytes.byteLength, byteStream, pos);
					byteStream.set(willMessagePayloadBytes, pos);
					pos += willMessagePayloadBytes.byteLength;
					
				}
			if (this.userName != undefined)
				pos = writeString(this.userName, UTF8Length(this.userName), byteStream, pos);
			if (this.password != undefined) 
				pos = writeString(this.password, UTF8Length(this.password), byteStream, pos);
			break;

			case MESSAGE_TYPE.PUBLISH:	
				// PUBLISH has a text or binary payload, if text do not add a 2 byte length field, just the UTF characters.	
				byteStream.set(payloadBytes, pos);
					
				break;

//    	    case MESSAGE_TYPE.PUBREC:	
//    	    case MESSAGE_TYPE.PUBREL:	
//    	    case MESSAGE_TYPE.PUBCOMP:	
//    	    	break;

			case MESSAGE_TYPE.SUBSCRIBE:
				// SUBSCRIBE has a list of topic strings and request QoS
				for (var i=0; i<this.topics.length; i++) {
					pos = writeString(this.topics[i], topicStrLength[i], byteStream, pos);
					byteStream[pos++] = this.requestedQos[i];
				}
				break;

			case MESSAGE_TYPE.UNSUBSCRIBE:	
				// UNSUBSCRIBE has a list of topic strings
				for (var i=0; i<this.topics.length; i++)
					pos = writeString(this.topics[i], topicStrLength[i], byteStream, pos);
				break;

			default:
				// Do nothing.
		}

		return buffer;
	}	

	function decodeMessage(input,pos) {
	    var startingPos = pos;
		var first = input[pos];
		var type = first >> 4;
		var messageInfo = first &= 0x0f;
		pos += 1;
		

		// Decode the remaining length (MBI format)

		var digit;
		var remLength = 0;
		var multiplier = 1;
		do {
			if (pos == input.length) {
			    return [null,startingPos];
			}
			digit = input[pos++];
			remLength += ((digit & 0x7F) * multiplier);
			multiplier *= 128;
		} while ((digit & 0x80) != 0);
		
		var endPos = pos+remLength;
		if (endPos > input.length) {
		    return [null,startingPos];
		}

		var wireMessage = new WireMessage(type);
		switch(type) {
			case MESSAGE_TYPE.CONNACK:
				var connectAcknowledgeFlags = input[pos++];
				if (connectAcknowledgeFlags & 0x01)
					wireMessage.sessionPresent = true;
				wireMessage.returnCode = input[pos++];
				break;
			
			case MESSAGE_TYPE.PUBLISH:     	    	
				var qos = (messageInfo >> 1) & 0x03;
							
				var len = readUint16(input, pos);
				pos += 2;
				var topicName = parseUTF8(input, pos, len);
				pos += len;
				// If QoS 1 or 2 there will be a messageIdentifier
				if (qos > 0) {
					wireMessage.messageIdentifier = readUint16(input, pos);
					pos += 2;
				}
				
				var message = new Paho.MQTT.Message(input.subarray(pos, endPos));
				if ((messageInfo & 0x01) == 0x01) 
					message.retained = true;
				if ((messageInfo & 0x08) == 0x08)
					message.duplicate =  true;
				message.qos = qos;
				message.destinationName = topicName;
				wireMessage.payloadMessage = message;	
				break;
			
			case  MESSAGE_TYPE.PUBACK:
			case  MESSAGE_TYPE.PUBREC:	    
			case  MESSAGE_TYPE.PUBREL:    
			case  MESSAGE_TYPE.PUBCOMP:
			case  MESSAGE_TYPE.UNSUBACK:    	    	
				wireMessage.messageIdentifier = readUint16(input, pos);
				break;
				
			case  MESSAGE_TYPE.SUBACK:
				wireMessage.messageIdentifier = readUint16(input, pos);
				pos += 2;
				wireMessage.returnCode = input.subarray(pos, endPos);	
				break;
		
			default:
				;
		}
				
		return [wireMessage,endPos];	
	}

	function writeUint16(input, buffer, offset) {
		buffer[offset++] = input >> 8;      //MSB
		buffer[offset++] = input % 256;     //LSB 
		return offset;
	}	

	function writeString(input, utf8Length, buffer, offset) {
		offset = writeUint16(utf8Length, buffer, offset);
		stringToUTF8(input, buffer, offset);
		return offset + utf8Length;
	}	

	function readUint16(buffer, offset) {
		return 256*buffer[offset] + buffer[offset+1];
	}	

	/**
	 * Encodes an MQTT Multi-Byte Integer
	 * @private 
	 */
	function encodeMBI(number) {
		var output = new Array(1);
		var numBytes = 0;

		do {
			var digit = number % 128;
			number = number >> 7;
			if (number > 0) {
				digit |= 0x80;
			}
			output[numBytes++] = digit;
		} while ( (number > 0) && (numBytes<4) );

		return output;
	}

	/**
	 * Takes a String and calculates its length in bytes when encoded in UTF8.
	 * @private
	 */
	function UTF8Length(input) {
		var output = 0;
		for (var i = 0; i<input.length; i++) 
		{
			var charCode = input.charCodeAt(i);
				if (charCode > 0x7FF)
				   {
					  // Surrogate pair means its a 4 byte character
					  if (0xD800 <= charCode && charCode <= 0xDBFF)
						{
						  i++;
						  output++;
						}
				   output +=3;
				   }
			else if (charCode > 0x7F)
				output +=2;
			else
				output++;
		} 
		return output;
	}
	
	/**
	 * Takes a String and writes it into an array as UTF8 encoded bytes.
	 * @private
	 */
	function stringToUTF8(input, output, start) {
		var pos = start;
		for (var i = 0; i<input.length; i++) {
			var charCode = input.charCodeAt(i);
			
			// Check for a surrogate pair.
			if (0xD800 <= charCode && charCode <= 0xDBFF) {
				var lowCharCode = input.charCodeAt(++i);
				if (isNaN(lowCharCode)) {
					throw new Error(format(ERROR.MALFORMED_UNICODE, [charCode, lowCharCode]));
				}
				charCode = ((charCode - 0xD800)<<10) + (lowCharCode - 0xDC00) + 0x10000;
			
			}
			
			if (charCode <= 0x7F) {
				output[pos++] = charCode;
			} else if (charCode <= 0x7FF) {
				output[pos++] = charCode>>6  & 0x1F | 0xC0;
				output[pos++] = charCode     & 0x3F | 0x80;
			} else if (charCode <= 0xFFFF) {    				    
				output[pos++] = charCode>>12 & 0x0F | 0xE0;
				output[pos++] = charCode>>6  & 0x3F | 0x80;   
				output[pos++] = charCode     & 0x3F | 0x80;   
			} else {
				output[pos++] = charCode>>18 & 0x07 | 0xF0;
				output[pos++] = charCode>>12 & 0x3F | 0x80;
				output[pos++] = charCode>>6  & 0x3F | 0x80;
				output[pos++] = charCode     & 0x3F | 0x80;
			};
		} 
		return output;
	}
	
	function parseUTF8(input, offset, length) {
		var output = "";
		var utf16;
		var pos = offset;

		while (pos < offset+length)
		{
			var byte1 = input[pos++];
			if (byte1 < 128)
				utf16 = byte1;
			else 
			{
				var byte2 = input[pos++]-128;
				if (byte2 < 0) 
					throw new Error(format(ERROR.MALFORMED_UTF, [byte1.toString(16), byte2.toString(16),""]));
				if (byte1 < 0xE0)             // 2 byte character
					utf16 = 64*(byte1-0xC0) + byte2;
				else 
				{ 
					var byte3 = input[pos++]-128;
					if (byte3 < 0) 
						throw new Error(format(ERROR.MALFORMED_UTF, [byte1.toString(16), byte2.toString(16), byte3.toString(16)]));
					if (byte1 < 0xF0)        // 3 byte character
						utf16 = 4096*(byte1-0xE0) + 64*byte2 + byte3;
								else
								{
								   var byte4 = input[pos++]-128;
								   if (byte4 < 0) 
						throw new Error(format(ERROR.MALFORMED_UTF, [byte1.toString(16), byte2.toString(16), byte3.toString(16), byte4.toString(16)]));
								   if (byte1 < 0xF8)        // 4 byte character 
										   utf16 = 262144*(byte1-0xF0) + 4096*byte2 + 64*byte3 + byte4;
					   else                     // longer encodings are not supported  
						throw new Error(format(ERROR.MALFORMED_UTF, [byte1.toString(16), byte2.toString(16), byte3.toString(16), byte4.toString(16)]));
								}
				}
			}  

				if (utf16 > 0xFFFF)   // 4 byte character - express as a surrogate pair
				  {
					 utf16 -= 0x10000;
					 output += String.fromCharCode(0xD800 + (utf16 >> 10)); // lead character
					 utf16 = 0xDC00 + (utf16 & 0x3FF);  // trail character
				  }
			output += String.fromCharCode(utf16);
		}
		return output;
	}
	
	/** 
	 * Repeat keepalive requests, monitor responses.
	 * @ignore
	 */
	var Pinger = function(client, window, keepAliveInterval) { 
		this._client = client;        	
		this._window = window;
		this._keepAliveInterval = keepAliveInterval*1000;     	
		this.isReset = false;
		
		var pingReq = new WireMessage(MESSAGE_TYPE.PINGREQ).encode(); 
		
		var doTimeout = function (pinger) {
			return function () {
				return doPing.apply(pinger);
			};
		};
		
		/** @ignore */
		var doPing = function() { 
			if (!this.isReset) {
				this._client._trace("Pinger.doPing", "Timed out");
				this._client._disconnected( ERROR.PING_TIMEOUT.code , format(ERROR.PING_TIMEOUT));
			} else {
				this.isReset = false;
				this._client._trace("Pinger.doPing", "send PINGREQ");
				this._client.socket.send(pingReq); 
				this.timeout = this._window.setTimeout(doTimeout(this), this._keepAliveInterval);
			}
		}

		this.reset = function() {
			this.isReset = true;
			this._window.clearTimeout(this.timeout);
			if (this._keepAliveInterval > 0)
				this.timeout = setTimeout(doTimeout(this), this._keepAliveInterval);
		}

		this.cancel = function() {
			this._window.clearTimeout(this.timeout);
		}
	 }; 

	/**
	 * Monitor request completion.
	 * @ignore
	 */
	var Timeout = function(client, window, timeoutSeconds, action, args) {
		this._window = window;
		if (!timeoutSeconds)
			timeoutSeconds = 30;
		
		var doTimeout = function (action, client, args) {
			return function () {
				return action.apply(client, args);
			};
		};
		this.timeout = setTimeout(doTimeout(action, client, args), timeoutSeconds * 1000);
		
		this.cancel = function() {
			this._window.clearTimeout(this.timeout);
		}
	}; 
	
	/*
	 * Internal implementation of the Websockets MQTT V3.1 client.
	 * 
	 * @name Paho.MQTT.ClientImpl @constructor 
	 * @param {String} host the DNS nameof the webSocket host. 
	 * @param {Number} port the port number for that host.
	 * @param {String} clientId the MQ client identifier.
	 */
	var ClientImpl = function (uri, host, port, path, clientId) {
		// Check dependencies are satisfied in this browser.
		if (!("WebSocket" in global && global["WebSocket"] !== null)) {
			throw new Error(format(ERROR.UNSUPPORTED, ["WebSocket"]));
		}
/*
		if (!("localStorage" in global && global["localStorage"] !== null)) {
			throw new Error(format(ERROR.UNSUPPORTED, ["localStorage"]));
		}
*/
		if (!("ArrayBuffer" in global && global["ArrayBuffer"] !== null)) {
			throw new Error(format(ERROR.UNSUPPORTED, ["ArrayBuffer"]));
		}
		this._trace("Paho.MQTT.Client", uri, host, port, path, clientId);

		this.host = host;
		this.port = port;
		this.path = path;
		this.uri = uri;
		this.clientId = clientId;

		// Local storagekeys are qualified with the following string.
		// The conditional inclusion of path in the key is for backward
		// compatibility to when the path was not configurable and assumed to
		// be /mqtt
		this._localKey=host+":"+port+(path!="/mqtt"?":"+path:"")+":"+clientId+":";

		// Create private instance-only message queue
		// Internal queue of messages to be sent, in sending order. 
		this._msg_queue = [];

		// Messages we have sent and are expecting a response for, indexed by their respective message ids. 
		this._sentMessages = {};

		// Messages we have received and acknowleged and are expecting a confirm message for
		// indexed by their respective message ids. 
		this._receivedMessages = {};

		// Internal list of callbacks to be executed when messages
		// have been successfully sent over web socket, e.g. disconnect
		// when it doesn't have to wait for ACK, just message is dispatched.
		this._notify_msg_sent = {};

		// Unique identifier for SEND messages, incrementing
		// counter as messages are sent.
		this._message_identifier = 1;
		
		// Used to determine the transmission sequence of stored sent messages.
		this._sequence = 0;
		

		// Load the local state, if any, from the saved version, only restore state relevant to this client.   	
		for (var key in _localStorage.getItems)
			if (   key.indexOf("Sent:"+this._localKey) == 0  		    
				|| key.indexOf("Received:"+this._localKey) == 0)
			this.restore(key);
	};

	// Messaging Client public instance members. 
	ClientImpl.prototype.host;
	ClientImpl.prototype.port;
	ClientImpl.prototype.path;
	ClientImpl.prototype.uri;
	ClientImpl.prototype.clientId;

	// Messaging Client private instance members.
	ClientImpl.prototype.socket;
	/* true once we have received an acknowledgement to a CONNECT packet. */
	ClientImpl.prototype.connected = false;
	/* The largest message identifier allowed, may not be larger than 2**16 but 
	 * if set smaller reduces the maximum number of outbound messages allowed.
	 */ 
	ClientImpl.prototype.maxMessageIdentifier = 65536;
	ClientImpl.prototype.connectOptions;
	ClientImpl.prototype.hostIndex;
	ClientImpl.prototype.onConnectionLost;
	ClientImpl.prototype.onMessageDelivered;
	ClientImpl.prototype.onMessageArrived;
	ClientImpl.prototype.onError;
	ClientImpl.prototype.traceFunction;
	ClientImpl.prototype._msg_queue = null;
	ClientImpl.prototype._connectTimeout;
	/* The sendPinger monitors how long we allow before we send data to prove to the server that we are alive. */
	ClientImpl.prototype.sendPinger = null;
	/* The receivePinger monitors how long we allow before we require evidence that the server is alive. */
	ClientImpl.prototype.receivePinger = null;
	
	ClientImpl.prototype.receiveBuffer = null;
	
	ClientImpl.prototype._traceBuffer = null;
	ClientImpl.prototype._MAX_TRACE_ENTRIES = 100;

	ClientImpl.prototype.connect = function (connectOptions) {
		var connectOptionsMasked = this._traceMask(connectOptions, "password"); 
		this._trace("Client.connect", connectOptionsMasked, this.socket, this.connected);
		
		if (this.connected) 
			throw new Error(format(ERROR.INVALID_STATE, ["already connected"]));
		if (this.socket)
			throw new Error(format(ERROR.INVALID_STATE, ["already connected"]));
		
		this.connectOptions = connectOptions;
		
		if (connectOptions.uris) {
			this.hostIndex = 0;
			this._doConnect(connectOptions.uris[0]);  
		} else {
			this._doConnect(this.uri);  		
		}
		
	};

	ClientImpl.prototype.subscribe = function (filter, subscribeOptions) {
		this._trace("Client.subscribe", filter, subscribeOptions);
			  
		if (!this.connected)
			throw new Error(format(ERROR.INVALID_STATE, ["not connected"]));
		
		var wireMessage = new WireMessage(MESSAGE_TYPE.SUBSCRIBE);
		wireMessage.topics=[filter];
		if (subscribeOptions.qos != undefined)
			wireMessage.requestedQos = [subscribeOptions.qos];
		else 
			wireMessage.requestedQos = [0];
		
		if (subscribeOptions.onSuccess) {
			wireMessage.onSuccess = function(grantedQos) {subscribeOptions.onSuccess({invocationContext:subscribeOptions.invocationContext,grantedQos:grantedQos});};
		}

		if (subscribeOptions.onFailure) {
			wireMessage.onFailure = function(errorCode) {subscribeOptions.onFailure({invocationContext:subscribeOptions.invocationContext,errorCode:errorCode});};
		}

		if (subscribeOptions.timeout) {
			wireMessage.timeOut = new Timeout(this, window, subscribeOptions.timeout, subscribeOptions.onFailure
					, [{invocationContext:subscribeOptions.invocationContext, 
						errorCode:ERROR.SUBSCRIBE_TIMEOUT.code, 
						errorMessage:format(ERROR.SUBSCRIBE_TIMEOUT)}]);
		}
		
		// All subscriptions return a SUBACK. 
		this._requires_ack(wireMessage);
		this._schedule_message(wireMessage);
	};

	/** @ignore */
	ClientImpl.prototype.unsubscribe = function(filter, unsubscribeOptions) {  
		this._trace("Client.unsubscribe", filter, unsubscribeOptions);
		
		if (!this.connected)
		   throw new Error(format(ERROR.INVALID_STATE, ["not connected"]));
		
		var wireMessage = new WireMessage(MESSAGE_TYPE.UNSUBSCRIBE);
		wireMessage.topics = [filter];
		
		if (unsubscribeOptions.onSuccess) {
			wireMessage.callback = function() {unsubscribeOptions.onSuccess({invocationContext:unsubscribeOptions.invocationContext});};
		}
		if (unsubscribeOptions.timeout) {
			wireMessage.timeOut = new Timeout(this, window, unsubscribeOptions.timeout, unsubscribeOptions.onFailure
					, [{invocationContext:unsubscribeOptions.invocationContext,
						errorCode:ERROR.UNSUBSCRIBE_TIMEOUT.code,
						errorMessage:format(ERROR.UNSUBSCRIBE_TIMEOUT)}]);
		}
	 
		// All unsubscribes return a SUBACK.         
		this._requires_ack(wireMessage);
		this._schedule_message(wireMessage);
	};
	 
	ClientImpl.prototype.send = function (message) {
		this._trace("Client.send", message);

		if (!this.connected)
		   throw new Error(format(ERROR.INVALID_STATE, ["not connected"]));
		
		wireMessage = new WireMessage(MESSAGE_TYPE.PUBLISH);
		wireMessage.payloadMessage = message;
		
		if (message.qos > 0)
			this._requires_ack(wireMessage);
		else if (this.onMessageDelivered)
			this._notify_msg_sent[wireMessage] = this.onMessageDelivered(wireMessage.payloadMessage);
		this._schedule_message(wireMessage);
	};
	
	ClientImpl.prototype.disconnect = function () {
		this._trace("Client.disconnect");

		if (!this.socket)
			throw new Error(format(ERROR.INVALID_STATE, ["not connecting or connected"]));
		
		wireMessage = new WireMessage(MESSAGE_TYPE.DISCONNECT);

		// Run the disconnected call back as soon as the message has been sent,
		// in case of a failure later on in the disconnect processing.
		// as a consequence, the _disconected call back may be run several times.
		this._notify_msg_sent[wireMessage] = scope(this._disconnected, this);

		this._schedule_message(wireMessage);
	};
	
	ClientImpl.prototype.getTraceLog = function () {
		if ( this._traceBuffer !== null ) {
			this._trace("Client.getTraceLog", new Date());
			this._trace("Client.getTraceLog in flight messages", this._sentMessages.length);
			for (var key in this._sentMessages)
				this._trace("_sentMessages ",key, this._sentMessages[key]);
			for (var key in this._receivedMessages)
				this._trace("_receivedMessages ",key, this._receivedMessages[key]);
			
			return this._traceBuffer;
		}
	};
	
	ClientImpl.prototype.startTrace = function () {
		if ( this._traceBuffer === null ) {
			this._traceBuffer = [];
		}
		this._trace("Client.startTrace", new Date(), version);
	};
	
	ClientImpl.prototype.stopTrace = function () {
		delete this._traceBuffer;
	};

	ClientImpl.prototype._doConnect = function (wsurl) { 	        
		// When the socket is open, this client will send the CONNECT WireMessage using the saved parameters. 
		if (this.connectOptions.useSSL) {
		    var uriParts = wsurl.split(":");
		    uriParts[0] = "wss";
		    wsurl = uriParts.join(":");
		}
		this.connected = false;
		if (this.connectOptions.mqttVersion < 4) {
			this.socket = new WebSocket(wsurl, ["mqttv3.1"]);
		} else {
			this.socket = new WebSocket(wsurl, ["mqtt"]);
		}
		this.socket.binaryType = 'arraybuffer';
		
		this.socket.onopen = scope(this._on_socket_open, this);
		this.socket.onmessage = scope(this._on_socket_message, this);
		this.socket.onerror = scope(this._on_socket_error, this);
		this.socket.onclose = scope(this._on_socket_close, this);
		
		this.sendPinger = new Pinger(this, window, this.connectOptions.keepAliveInterval);
		this.receivePinger = new Pinger(this, window, this.connectOptions.keepAliveInterval);
		
		this._connectTimeout = new Timeout(this, window, this.connectOptions.timeout, this._disconnected,  [ERROR.CONNECT_TIMEOUT.code, format(ERROR.CONNECT_TIMEOUT)]);
	};

	
	// Schedule a new message to be sent over the WebSockets
	// connection. CONNECT messages cause WebSocket connection
	// to be started. All other messages are queued internally
	// until this has happened. When WS connection starts, process
	// all outstanding messages. 
	ClientImpl.prototype._schedule_message = function (message) {
		this._msg_queue.push(message);
		// Process outstanding messages in the queue if we have an  open socket, and have received CONNACK. 
		if (this.connected) {
			this._process_queue();
		}
	};

	ClientImpl.prototype.store = function(prefix, wireMessage) {
		var storedMessage = {type:wireMessage.type, messageIdentifier:wireMessage.messageIdentifier, version:1};
		
		switch(wireMessage.type) {
		  case MESSAGE_TYPE.PUBLISH:
			  if(wireMessage.pubRecReceived)
				  storedMessage.pubRecReceived = true;
			  
			  // Convert the payload to a hex string.
			  storedMessage.payloadMessage = {};
			  var hex = "";
			  var messageBytes = wireMessage.payloadMessage.payloadBytes;
			  for (var i=0; i<messageBytes.length; i++) {
				if (messageBytes[i] <= 0xF)
				  hex = hex+"0"+messageBytes[i].toString(16);
				else 
				  hex = hex+messageBytes[i].toString(16);
			  }
			  storedMessage.payloadMessage.payloadHex = hex;
			  
			  storedMessage.payloadMessage.qos = wireMessage.payloadMessage.qos;
			  storedMessage.payloadMessage.destinationName = wireMessage.payloadMessage.destinationName;
			  if (wireMessage.payloadMessage.duplicate) 
				  storedMessage.payloadMessage.duplicate = true;
			  if (wireMessage.payloadMessage.retained) 
				  storedMessage.payloadMessage.retained = true;	   
			  
			  // Add a sequence number to sent messages.
			  if ( prefix.indexOf("Sent:") == 0 ) {
				  if ( wireMessage.sequence === undefined )
					  wireMessage.sequence = ++this._sequence;
				  storedMessage.sequence = wireMessage.sequence;
			  }
			  break;    
			  
			default:
				throw Error(format(ERROR.INVALID_STORED_DATA, [key, storedMessage]));
		}
		_localStorage.setItem(prefix+this._localKey+wireMessage.messageIdentifier, JSON.stringify(storedMessage));
	};
	
	ClientImpl.prototype.restore = function(key) {    	
		var value = _localStorage.getItem(key);
		var storedMessage = JSON.parse(value);
		
		var wireMessage = new WireMessage(storedMessage.type, storedMessage);
		
		switch(storedMessage.type) {
		  case MESSAGE_TYPE.PUBLISH:
			  // Replace the payload message with a Message object.
			  var hex = storedMessage.payloadMessage.payloadHex;
			  var buffer = new ArrayBuffer((hex.length)/2);
			  var byteStream = new Uint8Array(buffer); 
			  var i = 0;
			  while (hex.length >= 2) { 
				  var x = parseInt(hex.substring(0, 2), 16);
				  hex = hex.substring(2, hex.length);
				  byteStream[i++] = x;
			  }
			  var payloadMessage = new Paho.MQTT.Message(byteStream);
			  
			  payloadMessage.qos = storedMessage.payloadMessage.qos;
			  payloadMessage.destinationName = storedMessage.payloadMessage.destinationName;
			  if (storedMessage.payloadMessage.duplicate) 
				  payloadMessage.duplicate = true;
			  if (storedMessage.payloadMessage.retained) 
				  payloadMessage.retained = true;	 
			  wireMessage.payloadMessage = payloadMessage;
			  
			  break;    
			  
			default:
			  throw Error(format(ERROR.INVALID_STORED_DATA, [key, value]));
		}
							
		if (key.indexOf("Sent:"+this._localKey) == 0) {
			wireMessage.payloadMessage.duplicate = true;
			this._sentMessages[wireMessage.messageIdentifier] = wireMessage;    		    
		} else if (key.indexOf("Received:"+this._localKey) == 0) {
			this._receivedMessages[wireMessage.messageIdentifier] = wireMessage;
		}
	};
	
	ClientImpl.prototype._process_queue = function () {
		var message = null;
		// Process messages in order they were added
		var fifo = this._msg_queue.reverse();

		// Send all queued messages down socket connection
		while ((message = fifo.pop())) {
			this._socket_send(message);
			// Notify listeners that message was successfully sent
			if (this._notify_msg_sent[message]) {
				this._notify_msg_sent[message]();
				delete this._notify_msg_sent[message];
			}
		}
	};

	/**
	 * Expect an ACK response for this message. Add message to the set of in progress
	 * messages and set an unused identifier in this message.
	 * @ignore
	 */
	ClientImpl.prototype._requires_ack = function (wireMessage) {
		var messageCount = Object.keys(this._sentMessages).length;
		if (messageCount > this.maxMessageIdentifier)
			throw Error ("Too many messages:"+messageCount);

		while(this._sentMessages[this._message_identifier] !== undefined) {
			this._message_identifier++;
		}
		wireMessage.messageIdentifier = this._message_identifier;
		this._sentMessages[wireMessage.messageIdentifier] = wireMessage;
		if (wireMessage.type === MESSAGE_TYPE.PUBLISH) {
			this.store("Sent:", wireMessage);
		}
		if (this._message_identifier === this.maxMessageIdentifier) {
			this._message_identifier = 1;
		}
	};

	/** 
	 * Called when the underlying websocket has been opened.
	 * @ignore
	 */
	ClientImpl.prototype._on_socket_open = function () {      
		// Create the CONNECT message object.
		var wireMessage = new WireMessage(MESSAGE_TYPE.CONNECT, this.connectOptions); 
		wireMessage.clientId = this.clientId;
		this._socket_send(wireMessage);
	};

	/** 
	 * Called when the underlying websocket has received a complete packet.
	 * @ignore
	 */
	ClientImpl.prototype._on_socket_message = function (event) {
		this._trace("Client._on_socket_message", event.data);
		// Reset the receive ping timer, we now have evidence the server is alive.
		this.receivePinger.reset();
		var messages = this._deframeMessages(event.data);
		for (var i = 0; i < messages.length; i+=1) {
		    this._handleMessage(messages[i]);
		}
	}
	
	ClientImpl.prototype._deframeMessages = function(data) {
		var byteArray = new Uint8Array(data);
	    if (this.receiveBuffer) {
	        var newData = new Uint8Array(this.receiveBuffer.length+byteArray.length);
	        newData.set(this.receiveBuffer);
	        newData.set(byteArray,this.receiveBuffer.length);
	        byteArray = newData;
	        delete this.receiveBuffer;
	    }
		try {
		    var offset = 0;
		    var messages = [];
		    while(offset < byteArray.length) {
		        var result = decodeMessage(byteArray,offset);
		        var wireMessage = result[0];
		        offset = result[1];
		        if (wireMessage !== null) {
		            messages.push(wireMessage);
		        } else {
		            break;
		        }
		    }
		    if (offset < byteArray.length) {
		    	this.receiveBuffer = byteArray.subarray(offset);
		    }
		} catch (error) {
			this._disconnected(ERROR.INTERNAL_ERROR.code , format(ERROR.INTERNAL_ERROR, [error.message,error.stack.toString()]));
			return;
		}
		return messages;
	}
	
	ClientImpl.prototype._handleMessage = function(wireMessage) {
		
		this._trace("Client._handleMessage", wireMessage);

		try {
			switch(wireMessage.type) {
			case MESSAGE_TYPE.CONNACK:
				this._connectTimeout.cancel();
				
				// If we have started using clean session then clear up the local state.
				if (this.connectOptions.cleanSession) {
					for (var key in this._sentMessages) {	    		
						var sentMessage = this._sentMessages[key];
						_localStorage.removeItem("Sent:"+this._localKey+sentMessage.messageIdentifier);
					}
					this._sentMessages = {};

					for (var key in this._receivedMessages) {
						var receivedMessage = this._receivedMessages[key];
						_localStorage.removeItem("Received:"+this._localKey+receivedMessage.messageIdentifier);
					}
					this._receivedMessages = {};
				}
				// Client connected and ready for business.
				if (wireMessage.returnCode === 0) {
					this.connected = true;
					// Jump to the end of the list of uris and stop looking for a good host.
					if (this.connectOptions.uris)
						this.hostIndex = this.connectOptions.uris.length;
				} else {
					// modified br NETPIE
					if (wireMessage.returnCode > 0 && wireMessage.returnCode <= 5) {
						if (this.onError) {
							this.onError({code:wireMessage.returnCode,msg:CONNACK_RC[wireMessage.returnCode]});
						}
					}

					this._disconnected(ERROR.CONNACK_RETURNCODE.code , format(ERROR.CONNACK_RETURNCODE, [wireMessage.returnCode, CONNACK_RC[wireMessage.returnCode]]));
					break;
				}
				
				// Resend messages.
				var sequencedMessages = new Array();
				for (var msgId in this._sentMessages) {
					if (this._sentMessages.hasOwnProperty(msgId))
						sequencedMessages.push(this._sentMessages[msgId]);
				}
		  
				// Sort sentMessages into the original sent order.
				var sequencedMessages = sequencedMessages.sort(function(a,b) {return a.sequence - b.sequence;} );
				for (var i=0, len=sequencedMessages.length; i<len; i++) {
					var sentMessage = sequencedMessages[i];
					if (sentMessage.type == MESSAGE_TYPE.PUBLISH && sentMessage.pubRecReceived) {
						var pubRelMessage = new WireMessage(MESSAGE_TYPE.PUBREL, {messageIdentifier:sentMessage.messageIdentifier});
						this._schedule_message(pubRelMessage);
					} else {
						this._schedule_message(sentMessage);
					};
				}

				// Execute the connectOptions.onSuccess callback if there is one.
				if (this.connectOptions.onSuccess) {
					this.connectOptions.onSuccess({invocationContext:this.connectOptions.invocationContext});
				}

				// Process all queued messages now that the connection is established. 
				this._process_queue();
				break;
		
			case MESSAGE_TYPE.PUBLISH:
				this._receivePublish(wireMessage);
				break;

			case MESSAGE_TYPE.PUBACK:
				var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
				 // If this is a re flow of a PUBACK after we have restarted receivedMessage will not exist.
				if (sentMessage) {
					delete this._sentMessages[wireMessage.messageIdentifier];
					_localStorage.removeItem("Sent:"+this._localKey+wireMessage.messageIdentifier);
					if (this.onMessageDelivered)
						this.onMessageDelivered(sentMessage.payloadMessage);
				}
				break;
			
			case MESSAGE_TYPE.PUBREC:
				var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
				// If this is a re flow of a PUBREC after we have restarted receivedMessage will not exist.
				if (sentMessage) {
					sentMessage.pubRecReceived = true;
					var pubRelMessage = new WireMessage(MESSAGE_TYPE.PUBREL, {messageIdentifier:wireMessage.messageIdentifier});
					this.store("Sent:", sentMessage);
					this._schedule_message(pubRelMessage);
				}
				break;
								
			case MESSAGE_TYPE.PUBREL:
				var receivedMessage = this._receivedMessages[wireMessage.messageIdentifier];
				_localStorage.removeItem("Received:"+this._localKey+wireMessage.messageIdentifier);
				// If this is a re flow of a PUBREL after we have restarted receivedMessage will not exist.
				if (receivedMessage) {
					this._receiveMessage(receivedMessage);
					delete this._receivedMessages[wireMessage.messageIdentifier];
				}
				// Always flow PubComp, we may have previously flowed PubComp but the server lost it and restarted.
				var pubCompMessage = new WireMessage(MESSAGE_TYPE.PUBCOMP, {messageIdentifier:wireMessage.messageIdentifier});
				this._schedule_message(pubCompMessage);                    
				break;

			case MESSAGE_TYPE.PUBCOMP: 
				var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
				delete this._sentMessages[wireMessage.messageIdentifier];
				_localStorage.removeItem("Sent:"+this._localKey+wireMessage.messageIdentifier);
				if (this.onMessageDelivered)
					this.onMessageDelivered(sentMessage.payloadMessage);
				break;
				
			case MESSAGE_TYPE.SUBACK:
				var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
				if (sentMessage) {
					if(sentMessage.timeOut)
						sentMessage.timeOut.cancel();
					wireMessage.returnCode.indexOf = Array.prototype.indexOf;
					if (wireMessage.returnCode.indexOf(0x80) !== -1) {
						if (sentMessage.onFailure) {
							sentMessage.onFailure(wireMessage.returnCode);
						} 
					} else if (sentMessage.onSuccess) {
						sentMessage.onSuccess(wireMessage.returnCode);
					}
					delete this._sentMessages[wireMessage.messageIdentifier];
				}
				break;
				
			case MESSAGE_TYPE.UNSUBACK:
				var sentMessage = this._sentMessages[wireMessage.messageIdentifier];
				if (sentMessage) { 
					if (sentMessage.timeOut)
						sentMessage.timeOut.cancel();
					if (sentMessage.callback) {
						sentMessage.callback();
					}
					delete this._sentMessages[wireMessage.messageIdentifier];
				}

				break;
				
			case MESSAGE_TYPE.PINGRESP:
				/* The sendPinger or receivePinger may have sent a ping, the receivePinger has already been reset. */
				this.sendPinger.reset();
				break;
				
			case MESSAGE_TYPE.DISCONNECT:
				// Clients do not expect to receive disconnect packets.
				this._disconnected(ERROR.INVALID_MQTT_MESSAGE_TYPE.code , format(ERROR.INVALID_MQTT_MESSAGE_TYPE, [wireMessage.type]));
				break;

			default:
				this._disconnected(ERROR.INVALID_MQTT_MESSAGE_TYPE.code , format(ERROR.INVALID_MQTT_MESSAGE_TYPE, [wireMessage.type]));
			};
		} catch (error) {
			this._disconnected(ERROR.INTERNAL_ERROR.code , format(ERROR.INTERNAL_ERROR, [error.message,error.stack.toString()]));
			return;
		}
	};
	
	/** @ignore */
	ClientImpl.prototype._on_socket_error = function (error) {
		this._disconnected(ERROR.SOCKET_ERROR.code , format(ERROR.SOCKET_ERROR, [error.data]));
	};

	/** @ignore */
	ClientImpl.prototype._on_socket_close = function () {
		this._disconnected(ERROR.SOCKET_CLOSE.code , format(ERROR.SOCKET_CLOSE));
	};

	/** @ignore */
	ClientImpl.prototype._socket_send = function (wireMessage) {
		
		if (wireMessage.type == 1) {
			var wireMessageMasked = this._traceMask(wireMessage, "password"); 
			this._trace("Client._socket_send", wireMessageMasked);
		}
		else this._trace("Client._socket_send", wireMessage);
		
		this.socket.send(wireMessage.encode());
		/* We have proved to the server we are alive. */
		this.sendPinger.reset();
	};
	
	/** @ignore */
	ClientImpl.prototype._receivePublish = function (wireMessage) {
		switch(wireMessage.payloadMessage.qos) {
			case "undefined":
			case 0:
				this._receiveMessage(wireMessage);
				break;

			case 1:
				var pubAckMessage = new WireMessage(MESSAGE_TYPE.PUBACK, {messageIdentifier:wireMessage.messageIdentifier});
				this._schedule_message(pubAckMessage);
				this._receiveMessage(wireMessage);
				break;

			case 2:
				this._receivedMessages[wireMessage.messageIdentifier] = wireMessage;
				this.store("Received:", wireMessage);
				var pubRecMessage = new WireMessage(MESSAGE_TYPE.PUBREC, {messageIdentifier:wireMessage.messageIdentifier});
				this._schedule_message(pubRecMessage);

				break;

			default:
				throw Error("Invaild qos="+wireMmessage.payloadMessage.qos);
		};
	};

	/** @ignore */
	ClientImpl.prototype._receiveMessage = function (wireMessage) {
		if (this.onMessageArrived) {
			this.onMessageArrived(wireMessage.payloadMessage);
		}
	};

	/**
	 * Client has disconnected either at its own request or because the server
	 * or network disconnected it. Remove all non-durable state.
	 * @param {errorCode} [number] the error number.
	 * @param {errorText} [string] the error text.
	 * @ignore
	 */
	ClientImpl.prototype._disconnected = function (errorCode, errorText) {
		this._trace("Client._disconnected", errorCode, errorText);
		
		this.sendPinger.cancel();
		this.receivePinger.cancel();
		if (this._connectTimeout)
			this._connectTimeout.cancel();
		// Clear message buffers.
		this._msg_queue = [];
		this._notify_msg_sent = {};
	   
		if (this.socket) {
			// Cancel all socket callbacks so that they cannot be driven again by this socket.
			this.socket.onopen = null;
			this.socket.onmessage = null;
			this.socket.onerror = null;
			this.socket.onclose = null;
			if (this.socket.readyState === 1)
				this.socket.close();
			delete this.socket;           
		}
		
		if (this.connectOptions.uris && this.hostIndex < this.connectOptions.uris.length-1) {
			// Try the next host.
			this.hostIndex++;
			this._doConnect(this.connectOptions.uris[this.hostIndex]);
		
		} else {
		
			if (errorCode === undefined) {
				errorCode = ERROR.OK.code;
				errorText = format(ERROR.OK);
			}
			
			// Run any application callbacks last as they may attempt to reconnect and hence create a new socket.
			if (this.connected) {
				this.connected = false;
				// Execute the connectionLostCallback if there is one, and we were connected.       
				if (this.onConnectionLost)
					this.onConnectionLost({errorCode:errorCode, errorMessage:errorText});      	
			} else {
				// Otherwise we never had a connection, so indicate that the connect has failed.
				if (this.connectOptions.mqttVersion === 4 && this.connectOptions.mqttVersionExplicit === false) {
					this._trace("Failed to connect V4, dropping back to V3")
					this.connectOptions.mqttVersion = 3;
					if (this.connectOptions.uris) {
						this.hostIndex = 0;
						this._doConnect(this.connectOptions.uris[0]);  
					} else {
						this._doConnect(this.uri);
					}	
				} else if(this.connectOptions.onFailure) {
					this.connectOptions.onFailure({invocationContext:this.connectOptions.invocationContext, errorCode:errorCode, errorMessage:errorText});
				}
			}
		}
	};

	/** @ignore */
	ClientImpl.prototype._trace = function () {
		// Pass trace message back to client's callback function
		if (this.traceFunction) {
			for (var i in arguments)
			{	
				if (typeof arguments[i] !== "undefined")
					arguments[i] = JSON.stringify(arguments[i]);
			}
			var record = Array.prototype.slice.call(arguments).join("");
			this.traceFunction ({severity: "Debug", message: record	});
		}

		//buffer style trace
		if ( this._traceBuffer !== null ) {  
			for (var i = 0, max = arguments.length; i < max; i++) {
				if ( this._traceBuffer.length == this._MAX_TRACE_ENTRIES ) {    
					this._traceBuffer.shift();              
				}
				if (i === 0) this._traceBuffer.push(arguments[i]);
				else if (typeof arguments[i] === "undefined" ) this._traceBuffer.push(arguments[i]);
				else this._traceBuffer.push("  "+JSON.stringify(arguments[i]));
		   };
		};
	};
	
	/** @ignore */
	ClientImpl.prototype._traceMask = function (traceObject, masked) {
		var traceObjectMasked = {};
		for (var attr in traceObject) {
			if (traceObject.hasOwnProperty(attr)) {
				if (attr == masked) 
					traceObjectMasked[attr] = "******";
				else
					traceObjectMasked[attr] = traceObject[attr];
			} 
		}
		return traceObjectMasked;
	};

	// ------------------------------------------------------------------------
	// Public Programming interface.
	// ------------------------------------------------------------------------
	
	/** 
	 * The JavaScript application communicates to the server using a {@link Paho.MQTT.Client} object. 
	 * <p>
	 * Most applications will create just one Client object and then call its connect() method,
	 * however applications can create more than one Client object if they wish. 
	 * In this case the combination of host, port and clientId attributes must be different for each Client object.
	 * <p>
	 * The send, subscribe and unsubscribe methods are implemented as asynchronous JavaScript methods 
	 * (even though the underlying protocol exchange might be synchronous in nature). 
	 * This means they signal their completion by calling back to the application, 
	 * via Success or Failure callback functions provided by the application on the method in question. 
	 * Such callbacks are called at most once per method invocation and do not persist beyond the lifetime 
	 * of the script that made the invocation.
	 * <p>
	 * In contrast there are some callback functions, most notably <i>onMessageArrived</i>, 
	 * that are defined on the {@link Paho.MQTT.Client} object.  
	 * These may get called multiple times, and aren't directly related to specific method invocations made by the client. 
	 *
	 * @name Paho.MQTT.Client    
	 * 
	 * @constructor
	 *  
	 * @param {string} host - the address of the messaging server, as a fully qualified WebSocket URI, as a DNS name or dotted decimal IP address.
	 * @param {number} port - the port number to connect to - only required if host is not a URI
	 * @param {string} path - the path on the host to connect to - only used if host is not a URI. Default: '/mqtt'.
	 * @param {string} clientId - the Messaging client identifier, between 1 and 23 characters in length.
	 * 
	 * @property {string} host - <i>read only</i> the server's DNS hostname or dotted decimal IP address.
	 * @property {number} port - <i>read only</i> the server's port.
	 * @property {string} path - <i>read only</i> the server's path.
	 * @property {string} clientId - <i>read only</i> used when connecting to the server.
	 * @property {function} onConnectionLost - called when a connection has been lost. 
	 *                            after a connect() method has succeeded.
	 *                            Establish the call back used when a connection has been lost. The connection may be
	 *                            lost because the client initiates a disconnect or because the server or network 
	 *                            cause the client to be disconnected. The disconnect call back may be called without 
	 *                            the connectionComplete call back being invoked if, for example the client fails to 
	 *                            connect.
	 *                            A single response object parameter is passed to the onConnectionLost callback containing the following fields:
	 *                            <ol>   
	 *                            <li>errorCode
	 *                            <li>errorMessage       
	 *                            </ol>
	 * @property {function} onMessageDelivered called when a message has been delivered. 
	 *                            All processing that this Client will ever do has been completed. So, for example,
	 *                            in the case of a Qos=2 message sent by this client, the PubComp flow has been received from the server
	 *                            and the message has been removed from persistent storage before this callback is invoked. 
	 *                            Parameters passed to the onMessageDelivered callback are:
	 *                            <ol>   
	 *                            <li>{@link Paho.MQTT.Message} that was delivered.
	 *                            </ol>    
	 * @property {function} onMessageArrived called when a message has arrived in this Paho.MQTT.client. 
	 *                            Parameters passed to the onMessageArrived callback are:
	 *                            <ol>   
	 *                            <li>{@link Paho.MQTT.Message} that has arrived.
	 *                            </ol>    
	 */
	var Client = function (host, port, path, clientId) {
	    
	    var uri;
	    
		if (typeof host !== "string")
			throw new Error(format(ERROR.INVALID_TYPE, [typeof host, "host"]));
	    
	    if (arguments.length == 2) {
	        // host: must be full ws:// uri
	        // port: clientId
	        clientId = port;
	        uri = host;
	        var match = uri.match(/^(wss?):\/\/((\[(.+)\])|([^\/]+?))(:(\d+))?(\/.*)$/);
	        if (match) {
	            host = match[4]||match[2];
	            port = parseInt(match[7]);
	            path = match[8];
	        } else {
	            throw new Error(format(ERROR.INVALID_ARGUMENT,[host,"host"]));
	        }
	    } else {
	        if (arguments.length == 3) {
				clientId = path;
				path = "/mqtt";
			}
			if (typeof port !== "number" || port < 0)
				throw new Error(format(ERROR.INVALID_TYPE, [typeof port, "port"]));
			if (typeof path !== "string")
				throw new Error(format(ERROR.INVALID_TYPE, [typeof path, "path"]));
			
			var ipv6AddSBracket = (host.indexOf(":") != -1 && host.slice(0,1) != "[" && host.slice(-1) != "]");
			uri = "ws://"+(ipv6AddSBracket?"["+host+"]":host)+":"+port+path;
		}

		var clientIdLength = 0;
		for (var i = 0; i<clientId.length; i++) {
			var charCode = clientId.charCodeAt(i);                   
			if (0xD800 <= charCode && charCode <= 0xDBFF)  {    			
				 i++; // Surrogate pair.
			}   		   
			clientIdLength++;
		}     	   	
		if (typeof clientId !== "string" || clientIdLength > 65535)
			throw new Error(format(ERROR.INVALID_ARGUMENT, [clientId, "clientId"])); 
		
		var client = new ClientImpl(uri, host, port, path, clientId);
		this._getHost =  function() { return host; };
		this._setHost = function() { throw new Error(format(ERROR.UNSUPPORTED_OPERATION)); };
			
		this._getPort = function() { return port; };
		this._setPort = function() { throw new Error(format(ERROR.UNSUPPORTED_OPERATION)); };

		this._getPath = function() { return path; };
		this._setPath = function() { throw new Error(format(ERROR.UNSUPPORTED_OPERATION)); };

		this._getURI = function() { return uri; };
		this._setURI = function() { throw new Error(format(ERROR.UNSUPPORTED_OPERATION)); };
		
		this._getClientId = function() { return client.clientId; };
		this._setClientId = function() { throw new Error(format(ERROR.UNSUPPORTED_OPERATION)); };
		
		this._getOnConnectionLost = function() { return client.onConnectionLost; };
		this._setOnConnectionLost = function(newOnConnectionLost) { 
			if (typeof newOnConnectionLost === "function")
				client.onConnectionLost = newOnConnectionLost;
			else 
				throw new Error(format(ERROR.INVALID_TYPE, [typeof newOnConnectionLost, "onConnectionLost"]));
		};

		this._getOnMessageDelivered = function() { return client.onMessageDelivered; };
		this._setOnMessageDelivered = function(newOnMessageDelivered) { 
			if (typeof newOnMessageDelivered === "function")
				client.onMessageDelivered = newOnMessageDelivered;
			else 
				throw new Error(format(ERROR.INVALID_TYPE, [typeof newOnMessageDelivered, "onMessageDelivered"]));
		};
	   
		this._getOnMessageArrived = function() { return client.onMessageArrived; };
		this._setOnMessageArrived = function(newOnMessageArrived) { 
			if (typeof newOnMessageArrived === "function")
				client.onMessageArrived = newOnMessageArrived;
			else 
				throw new Error(format(ERROR.INVALID_TYPE, [typeof newOnMessageArrived, "onMessageArrived"]));
		};

		this._getOnError = function() { return client.onError; };
		this._setOnError = function(newOnError) { 
			if (typeof newOnError === "function")
				client.onError = newOnError;
			else 
				throw new Error(format(ERROR.INVALID_TYPE, [typeof newOnError, "onError"]));
		};

		this._getTrace = function() { return client.traceFunction; };
		this._setTrace = function(trace) {
			if(typeof trace === "function"){
				client.traceFunction = trace;
			}else{
				throw new Error(format(ERROR.INVALID_TYPE, [typeof trace, "onTrace"]));
			}
		};
		
		/** 
		 * Connect this Messaging client to its server. 
		 * 
		 * @name Paho.MQTT.Client#connect
		 * @function
		 * @param {Object} connectOptions - attributes used with the connection. 
		 * @param {number} connectOptions.timeout - If the connect has not succeeded within this 
		 *                    number of seconds, it is deemed to have failed.
		 *                    The default is 30 seconds.
		 * @param {string} connectOptions.userName - Authentication username for this connection.
		 * @param {string} connectOptions.password - Authentication password for this connection.
		 * @param {Paho.MQTT.Message} connectOptions.willMessage - sent by the server when the client
		 *                    disconnects abnormally.
		 * @param {Number} connectOptions.keepAliveInterval - the server disconnects this client if
		 *                    there is no activity for this number of seconds.
		 *                    The default value of 60 seconds is assumed if not set.
		 * @param {boolean} connectOptions.cleanSession - if true(default) the client and server 
		 *                    persistent state is deleted on successful connect.
		 * @param {boolean} connectOptions.useSSL - if present and true, use an SSL Websocket connection.
		 * @param {object} connectOptions.invocationContext - passed to the onSuccess callback or onFailure callback.
		 * @param {function} connectOptions.onSuccess - called when the connect acknowledgement 
		 *                    has been received from the server.
		 * A single response object parameter is passed to the onSuccess callback containing the following fields:
		 * <ol>
		 * <li>invocationContext as passed in to the onSuccess method in the connectOptions.       
		 * </ol>
		 * @config {function} [onFailure] called when the connect request has failed or timed out.
		 * A single response object parameter is passed to the onFailure callback containing the following fields:
		 * <ol>
		 * <li>invocationContext as passed in to the onFailure method in the connectOptions.       
		 * <li>errorCode a number indicating the nature of the error.
		 * <li>errorMessage text describing the error.      
		 * </ol>
		 * @config {Array} [hosts] If present this contains either a set of hostnames or fully qualified
		 * WebSocket URIs (ws://example.com:1883/mqtt), that are tried in order in place 
		 * of the host and port paramater on the construtor. The hosts are tried one at at time in order until
		 * one of then succeeds.
		 * @config {Array} [ports] If present the set of ports matching the hosts. If hosts contains URIs, this property
		 * is not used.
		 * @throws {InvalidState} if the client is not in disconnected state. The client must have received connectionLost
		 * or disconnected before calling connect for a second or subsequent time.
		 */
		this.connect = function (connectOptions) {
			connectOptions = connectOptions || {} ;
			validate(connectOptions,  {timeout:"number",
									   userName:"string", 
									   password:"string", 
									   willMessage:"object", 
									   keepAliveInterval:"number", 
									   cleanSession:"boolean", 
									   useSSL:"boolean",
									   invocationContext:"object", 
									   onSuccess:"function", 
									   onFailure:"function",
									   hosts:"object",
									   ports:"object",
									   mqttVersion:"number"});
			
			// If no keep alive interval is set, assume 60 seconds.
			if (connectOptions.keepAliveInterval === undefined)
				connectOptions.keepAliveInterval = 60;

			if (connectOptions.mqttVersion > 4 || connectOptions.mqttVersion < 3) {
				throw new Error(format(ERROR.INVALID_ARGUMENT, [connectOptions.mqttVersion, "connectOptions.mqttVersion"]));
			}

			if (connectOptions.mqttVersion === undefined) {
				connectOptions.mqttVersionExplicit = false;
				connectOptions.mqttVersion = 4;
			} else {
				connectOptions.mqttVersionExplicit = true;
			}

			//Check that if password is set, so is username
			if (connectOptions.password === undefined && connectOptions.userName !== undefined)
				throw new Error(format(ERROR.INVALID_ARGUMENT, [connectOptions.password, "connectOptions.password"]))

			if (connectOptions.willMessage) {
				if (!(connectOptions.willMessage instanceof Message))
					throw new Error(format(ERROR.INVALID_TYPE, [connectOptions.willMessage, "connectOptions.willMessage"]));
				// The will message must have a payload that can be represented as a string.
				// Cause the willMessage to throw an exception if this is not the case.
				connectOptions.willMessage.stringPayload;
				
				if (typeof connectOptions.willMessage.destinationName === "undefined")
					throw new Error(format(ERROR.INVALID_TYPE, [typeof connectOptions.willMessage.destinationName, "connectOptions.willMessage.destinationName"]));
			}
			if (typeof connectOptions.cleanSession === "undefined")
				connectOptions.cleanSession = true;
			if (connectOptions.hosts) {
			    
				if (!(connectOptions.hosts instanceof Array) )
					throw new Error(format(ERROR.INVALID_ARGUMENT, [connectOptions.hosts, "connectOptions.hosts"]));
				if (connectOptions.hosts.length <1 )
					throw new Error(format(ERROR.INVALID_ARGUMENT, [connectOptions.hosts, "connectOptions.hosts"]));
				
				var usingURIs = false;
				for (var i = 0; i<connectOptions.hosts.length; i++) {
					if (typeof connectOptions.hosts[i] !== "string")
						throw new Error(format(ERROR.INVALID_TYPE, [typeof connectOptions.hosts[i], "connectOptions.hosts["+i+"]"]));
					if (/^(wss?):\/\/((\[(.+)\])|([^\/]+?))(:(\d+))?(\/.*)$/.test(connectOptions.hosts[i])) {
						if (i == 0) {
							usingURIs = true;
						} else if (!usingURIs) {
							throw new Error(format(ERROR.INVALID_ARGUMENT, [connectOptions.hosts[i], "connectOptions.hosts["+i+"]"]));
						}
					} else if (usingURIs) {
						throw new Error(format(ERROR.INVALID_ARGUMENT, [connectOptions.hosts[i], "connectOptions.hosts["+i+"]"]));
					}
				}
				
				if (!usingURIs) {
					if (!connectOptions.ports)
						throw new Error(format(ERROR.INVALID_ARGUMENT, [connectOptions.ports, "connectOptions.ports"]));
					if (!(connectOptions.ports instanceof Array) )
						throw new Error(format(ERROR.INVALID_ARGUMENT, [connectOptions.ports, "connectOptions.ports"]));
					if (connectOptions.hosts.length != connectOptions.ports.length)
						throw new Error(format(ERROR.INVALID_ARGUMENT, [connectOptions.ports, "connectOptions.ports"]));
					
					connectOptions.uris = [];
					
					for (var i = 0; i<connectOptions.hosts.length; i++) {
						if (typeof connectOptions.ports[i] !== "number" || connectOptions.ports[i] < 0)
							throw new Error(format(ERROR.INVALID_TYPE, [typeof connectOptions.ports[i], "connectOptions.ports["+i+"]"]));
						var host = connectOptions.hosts[i];
						var port = connectOptions.ports[i];
						
						var ipv6 = (host.indexOf(":") != -1);
						uri = "ws://"+(ipv6?"["+host+"]":host)+":"+port+path;
						connectOptions.uris.push(uri);
					}
				} else {
					connectOptions.uris = connectOptions.hosts;
				}
			}
			
			client.connect(connectOptions);
		};
	 
		/** 
		 * Subscribe for messages, request receipt of a copy of messages sent to the destinations described by the filter.
		 * 
		 * @name Paho.MQTT.Client#subscribe
		 * @function
		 * @param {string} filter describing the destinations to receive messages from.
		 * <br>
		 * @param {object} subscribeOptions - used to control the subscription
		 *
		 * @param {number} subscribeOptions.qos - the maiximum qos of any publications sent 
		 *                                  as a result of making this subscription.
		 * @param {object} subscribeOptions.invocationContext - passed to the onSuccess callback 
		 *                                  or onFailure callback.
		 * @param {function} subscribeOptions.onSuccess - called when the subscribe acknowledgement
		 *                                  has been received from the server.
		 *                                  A single response object parameter is passed to the onSuccess callback containing the following fields:
		 *                                  <ol>
		 *                                  <li>invocationContext if set in the subscribeOptions.       
		 *                                  </ol>
		 * @param {function} subscribeOptions.onFailure - called when the subscribe request has failed or timed out.
		 *                                  A single response object parameter is passed to the onFailure callback containing the following fields:
		 *                                  <ol>
		 *                                  <li>invocationContext - if set in the subscribeOptions.       
		 *                                  <li>errorCode - a number indicating the nature of the error.
		 *                                  <li>errorMessage - text describing the error.      
		 *                                  </ol>
		 * @param {number} subscribeOptions.timeout - which, if present, determines the number of
		 *                                  seconds after which the onFailure calback is called.
		 *                                  The presence of a timeout does not prevent the onSuccess
		 *                                  callback from being called when the subscribe completes.         
		 * @throws {InvalidState} if the client is not in connected state.
		 */
		this.subscribe = function (filter, subscribeOptions) {
			if (typeof filter !== "string")
				throw new Error("Invalid argument:"+filter);
			subscribeOptions = subscribeOptions || {} ;
			validate(subscribeOptions,  {qos:"number", 
										 invocationContext:"object", 
										 onSuccess:"function", 
										 onFailure:"function",
										 timeout:"number"
										});
			if (subscribeOptions.timeout && !subscribeOptions.onFailure)
				throw new Error("subscribeOptions.timeout specified with no onFailure callback.");
			if (typeof subscribeOptions.qos !== "undefined" 
				&& !(subscribeOptions.qos === 0 || subscribeOptions.qos === 1 || subscribeOptions.qos === 2 ))
				throw new Error(format(ERROR.INVALID_ARGUMENT, [subscribeOptions.qos, "subscribeOptions.qos"]));
			client.subscribe(filter, subscribeOptions);
		};

		/**
		 * Unsubscribe for messages, stop receiving messages sent to destinations described by the filter.
		 * 
		 * @name Paho.MQTT.Client#unsubscribe
		 * @function
		 * @param {string} filter - describing the destinations to receive messages from.
		 * @param {object} unsubscribeOptions - used to control the subscription
		 * @param {object} unsubscribeOptions.invocationContext - passed to the onSuccess callback 
		                                      or onFailure callback.
		 * @param {function} unsubscribeOptions.onSuccess - called when the unsubscribe acknowledgement has been received from the server.
		 *                                    A single response object parameter is passed to the 
		 *                                    onSuccess callback containing the following fields:
		 *                                    <ol>
		 *                                    <li>invocationContext - if set in the unsubscribeOptions.     
		 *                                    </ol>
		 * @param {function} unsubscribeOptions.onFailure called when the unsubscribe request has failed or timed out.
		 *                                    A single response object parameter is passed to the onFailure callback containing the following fields:
		 *                                    <ol>
		 *                                    <li>invocationContext - if set in the unsubscribeOptions.       
		 *                                    <li>errorCode - a number indicating the nature of the error.
		 *                                    <li>errorMessage - text describing the error.      
		 *                                    </ol>
		 * @param {number} unsubscribeOptions.timeout - which, if present, determines the number of seconds
		 *                                    after which the onFailure callback is called. The presence of
		 *                                    a timeout does not prevent the onSuccess callback from being
		 *                                    called when the unsubscribe completes
		 * @throws {InvalidState} if the client is not in connected state.
		 */
		this.unsubscribe = function (filter, unsubscribeOptions) {
			if (typeof filter !== "string")
				throw new Error("Invalid argument:"+filter);
			unsubscribeOptions = unsubscribeOptions || {} ;
			validate(unsubscribeOptions,  {invocationContext:"object", 
										   onSuccess:"function", 
										   onFailure:"function",
										   timeout:"number"
										  });
			if (unsubscribeOptions.timeout && !unsubscribeOptions.onFailure)
				throw new Error("unsubscribeOptions.timeout specified with no onFailure callback.");
			client.unsubscribe(filter, unsubscribeOptions);
		};

		/**
		 * Send a message to the consumers of the destination in the Message.
		 * 
		 * @name Paho.MQTT.Client#send
		 * @function 
		 * @param {string|Paho.MQTT.Message} topic - <b>mandatory</b> The name of the destination to which the message is to be sent. 
		 * 					   - If it is the only parameter, used as Paho.MQTT.Message object.
		 * @param {String|ArrayBuffer} payload - The message data to be sent. 
		 * @param {number} qos The Quality of Service used to deliver the message.
		 * 		<dl>
		 * 			<dt>0 Best effort (default).
		 *     			<dt>1 At least once.
		 *     			<dt>2 Exactly once.     
		 * 		</dl>
		 * @param {Boolean} retained If true, the message is to be retained by the server and delivered 
		 *                     to both current and future subscriptions.
		 *                     If false the server only delivers the message to current subscribers, this is the default for new Messages. 
		 *                     A received message has the retained boolean set to true if the message was published 
		 *                     with the retained boolean set to true
		 *                     and the subscrption was made after the message has been published. 
		 * @throws {InvalidState} if the client is not connected.
		 */   
		this.send = function (topic,payload,qos,retained) {   
			var message ;  
			
			if(arguments.length == 0){
				throw new Error("Invalid argument."+"length");

			}else if(arguments.length == 1) {

				if (!(topic instanceof Message) && (typeof topic !== "string"))
					throw new Error("Invalid argument:"+ typeof topic);

				message = topic;
				if (typeof message.destinationName === "undefined")
					throw new Error(format(ERROR.INVALID_ARGUMENT,[message.destinationName,"Message.destinationName"]));
				client.send(message); 

			}else {
				//parameter checking in Message object 
				message = new Message(payload);
				message.destinationName = topic;
				if(arguments.length >= 3)
					message.qos = qos;
				if(arguments.length >= 4)
					message.retained = retained;
				client.send(message); 
			}
		};
		
		/** 
		 * Normal disconnect of this Messaging client from its server.
		 * 
		 * @name Paho.MQTT.Client#disconnect
		 * @function
		 * @throws {InvalidState} if the client is already disconnected.     
		 */
		this.disconnect = function () {
			client.disconnect();
		};
		
		/** 
		 * Get the contents of the trace log.
		 * 
		 * @name Paho.MQTT.Client#getTraceLog
		 * @function
		 * @return {Object[]} tracebuffer containing the time ordered trace records.
		 */
		this.getTraceLog = function () {
			return client.getTraceLog();
		}
		
		/** 
		 * Start tracing.
		 * 
		 * @name Paho.MQTT.Client#startTrace
		 * @function
		 */
		this.startTrace = function () {
			client.startTrace();
		};
		
		/** 
		 * Stop tracing.
		 * 
		 * @name Paho.MQTT.Client#stopTrace
		 * @function
		 */
		this.stopTrace = function () {
			client.stopTrace();
		};

		this.isConnected = function() {
			return client.connected;
		};
	};

	Client.prototype = {
		get host() { return this._getHost(); },
		set host(newHost) { this._setHost(newHost); },
			
		get port() { return this._getPort(); },
		set port(newPort) { this._setPort(newPort); },

		get path() { return this._getPath(); },
		set path(newPath) { this._setPath(newPath); },
			
		get clientId() { return this._getClientId(); },
		set clientId(newClientId) { this._setClientId(newClientId); },

		get onConnectionLost() { return this._getOnConnectionLost(); },
		set onConnectionLost(newOnConnectionLost) { this._setOnConnectionLost(newOnConnectionLost); },

		get onMessageDelivered() { return this._getOnMessageDelivered(); },
		set onMessageDelivered(newOnMessageDelivered) { this._setOnMessageDelivered(newOnMessageDelivered); },
		
		get onMessageArrived() { return this._getOnMessageArrived(); },
		set onMessageArrived(newOnMessageArrived) { this._setOnMessageArrived(newOnMessageArrived); },

		get onError() { return this._getOnError(); },
		set onError(newOnError) { this._setOnError(newOnError); },

		get trace() { return this._getTrace(); },
		set trace(newTraceFunction) { this._setTrace(newTraceFunction); }	

	};
	
	/** 
	 * An application message, sent or received.
	 * <p>
	 * All attributes may be null, which implies the default values.
	 * 
	 * @name Paho.MQTT.Message
	 * @constructor
	 * @param {String|ArrayBuffer} payload The message data to be sent.
	 * <p>
	 * @property {string} payloadString <i>read only</i> The payload as a string if the payload consists of valid UTF-8 characters.
	 * @property {ArrayBuffer} payloadBytes <i>read only</i> The payload as an ArrayBuffer.
	 * <p>
	 * @property {string} destinationName <b>mandatory</b> The name of the destination to which the message is to be sent
	 *                    (for messages about to be sent) or the name of the destination from which the message has been received.
	 *                    (for messages received by the onMessage function).
	 * <p>
	 * @property {number} qos The Quality of Service used to deliver the message.
	 * <dl>
	 *     <dt>0 Best effort (default).
	 *     <dt>1 At least once.
	 *     <dt>2 Exactly once.     
	 * </dl>
	 * <p>
	 * @property {Boolean} retained If true, the message is to be retained by the server and delivered 
	 *                     to both current and future subscriptions.
	 *                     If false the server only delivers the message to current subscribers, this is the default for new Messages. 
	 *                     A received message has the retained boolean set to true if the message was published 
	 *                     with the retained boolean set to true
	 *                     and the subscrption was made after the message has been published. 
	 * <p>
	 * @property {Boolean} duplicate <i>read only</i> If true, this message might be a duplicate of one which has already been received. 
	 *                     This is only set on messages received from the server.
	 *                     
	 */
	var Message = function (newPayload) {  
		var payload;
		if (   typeof newPayload === "string" 
			|| newPayload instanceof ArrayBuffer
			|| newPayload instanceof Int8Array
			|| newPayload instanceof Uint8Array
			|| newPayload instanceof Int16Array
			|| newPayload instanceof Uint16Array
			|| newPayload instanceof Int32Array
			|| newPayload instanceof Uint32Array
			|| newPayload instanceof Float32Array
			|| newPayload instanceof Float64Array
		   ) {
			payload = newPayload;
		} else {
			throw (format(ERROR.INVALID_ARGUMENT, [newPayload, "newPayload"]));
		}

		this._getPayloadString = function () {
			if (typeof payload === "string")
				return payload;
			else
				return parseUTF8(payload, 0, payload.length); 
		};

		this._getPayloadBytes = function() {
			if (typeof payload === "string") {
				var buffer = new ArrayBuffer(UTF8Length(payload));
				var byteStream = new Uint8Array(buffer); 
				stringToUTF8(payload, byteStream, 0);

				return byteStream;
			} else {
				return payload;
			};
		};

		var destinationName = undefined;
		this._getDestinationName = function() { return destinationName; };
		this._setDestinationName = function(newDestinationName) { 
			if (typeof newDestinationName === "string")
				destinationName = newDestinationName;
			else 
				throw new Error(format(ERROR.INVALID_ARGUMENT, [newDestinationName, "newDestinationName"]));
		};
				
		var qos = 0;
		this._getQos = function() { return qos; };
		this._setQos = function(newQos) { 
			if (newQos === 0 || newQos === 1 || newQos === 2 )
				qos = newQos;
			else 
				throw new Error("Invalid argument:"+newQos);
		};

		var retained = false;
		this._getRetained = function() { return retained; };
		this._setRetained = function(newRetained) { 
			if (typeof newRetained === "boolean")
				retained = newRetained;
			else 
				throw new Error(format(ERROR.INVALID_ARGUMENT, [newRetained, "newRetained"]));
		};
		
		var duplicate = false;
		this._getDuplicate = function() { return duplicate; };
		this._setDuplicate = function(newDuplicate) { duplicate = newDuplicate; };
	};
	
	Message.prototype = {
		get payloadString() { return this._getPayloadString(); },
		get payloadBytes() { return this._getPayloadBytes(); },
		
		get destinationName() { return this._getDestinationName(); },
		set destinationName(newDestinationName) { this._setDestinationName(newDestinationName); },
		
		get qos() { return this._getQos(); },
		set qos(newQos) { this._setQos(newQos); },

		get retained() { return this._getRetained(); },
		set retained(newRetained) { this._setRetained(newRetained); },

		get duplicate() { return this._getDuplicate(); },
		set duplicate(newDuplicate) { this._setDuplicate(newDuplicate); }
	};
	   
	// Module contents.
	return {
		Client: Client,
		Message: Message
	};
})(window);

/**
 * OAuth-1.0a library
 * Source : https://github.com/ddo/oauth-1.0a
 */

if (typeof(module) !== 'undefined' && typeof(exports) !== 'undefined') {
    module.exports = OAuth;
    var CryptoJS = require("crypto-js");
}

/**
 * Constructor
 * @param {Object} opts consumer key and secret
 */
function OAuth(opts) {
    if(!(this instanceof OAuth)) {
        return new OAuth(opts);
    }

    if(!opts) {
        opts = {};
    }

    if(!opts.consumer) {
        throw new Error('consumer option is required');
    }

    this.consumer            = opts.consumer;
    this.signature_method    = opts.signature_method || 'HMAC-SHA1';
    this.nonce_length        = opts.nonce_length || 32;
    this.version             = opts.version || '1.0';
    this.parameter_seperator = opts.parameter_seperator || ', ';

    if(typeof opts.last_ampersand === 'undefined') {
        this.last_ampersand = true;
    } else {
        this.last_ampersand = opts.last_ampersand;
    }

    switch (this.signature_method) {
        case 'HMAC-SHA1':
            this.hash = function(base_string, key) {
                return CryptoJS.HmacSHA1(base_string, key).toString(CryptoJS.enc.Base64);
            };
            break;

        case 'HMAC-SHA256':
            this.hash = function(base_string, key) {
                return CryptoJS.HmacSHA256(base_string, key).toString(CryptoJS.enc.Base64);
            };
            break;

        case 'PLAINTEXT':
            this.hash = function(base_string, key) {
                return key;
            };
            break;
            
        case 'RSA-SHA1':
            throw new Error('oauth-1.0a does not support this signature method right now. Coming Soon...');
        default:
            throw new Error('The OAuth 1.0a protocol defines three signature methods: HMAC-SHA1, RSA-SHA1, and PLAINTEXT only');
    }
}

/**
 * OAuth request authorize
 * @param  {Object} request data
 * {
 *     method,
 *     url,
 *     data
 * }
 * @param  {Object} public and secret token
 * @return {Object} OAuth Authorized data
 */
OAuth.prototype.authorize = function(request, token) {
    var oauth_data = {
        oauth_consumer_key: this.consumer.public,
        oauth_nonce: this.getNonce(),
        oauth_signature_method: this.signature_method,
        oauth_timestamp: this.getTimeStamp(),
        oauth_version: this.version
    };

    if(!token) {
        token = {};
    }

    if(token.public) {
        oauth_data.oauth_token = token.public;
    }

    if(!request.data) {
        request.data = {};
    }

    oauth_data.oauth_signature = this.getSignature(request, token.secret, oauth_data);

    return oauth_data;
};

/**
 * Create a OAuth Signature
 * @param  {Object} request data
 * @param  {Object} token_secret public and secret token
 * @param  {Object} oauth_data   OAuth data
 * @return {String} Signature
 */
OAuth.prototype.getSignature = function(request, token_secret, oauth_data) {
    return this.hash(this.getBaseString(request, oauth_data), this.getSigningKey(token_secret));
};

/**
 * Base String = Method + Base Url + ParameterString
 * @param  {Object} request data
 * @param  {Object} OAuth data
 * @return {String} Base String
 */
OAuth.prototype.getBaseString = function(request, oauth_data) {
    return request.method.toUpperCase() + '&' + this.percentEncode(this.getBaseUrl(request.url)) + '&' + this.percentEncode(this.getParameterString(request, oauth_data));
};

/**
 * Get data from url
 * -> merge with oauth data
 * -> percent encode key & value
 * -> sort
 * 
 * @param  {Object} request data
 * @param  {Object} OAuth data
 * @return {Object} Parameter string data
 */
OAuth.prototype.getParameterString = function(request, oauth_data) {
    var base_string_data = this.sortObject(this.percentEncodeData(this.mergeObject(oauth_data, this.mergeObject(request.data, this.deParamUrl(request.url)))));

    var data_str = '';

    //base_string_data to string
    for(var key in base_string_data) {
        data_str += key + '=' + base_string_data[key] + '&';
    }

    //remove the last character
    data_str = data_str.substr(0, data_str.length - 1);
    return data_str;
};

/**
 * Create a Signing Key
 * @param  {String} token_secret Secret Token
 * @return {String} Signing Key
 */
OAuth.prototype.getSigningKey = function(token_secret) {
    token_secret = token_secret || '';

    if(!this.last_ampersand && !token_secret) {
        return this.percentEncode(this.consumer.secret);
    }

    return this.percentEncode(this.consumer.secret) + '&' + this.percentEncode(token_secret);
};

/**
 * Get base url
 * @param  {String} url
 * @return {String}
 */
OAuth.prototype.getBaseUrl = function(url) {
    return url.split('?')[0];
};

/**
 * Get data from String
 * @param  {String} string
 * @return {Object}
 */
OAuth.prototype.deParam = function(string) {
    var arr = decodeURIComponent(string).split('&');
    var data = {};

    for(var i = 0; i < arr.length; i++) {
        var item = arr[i].split('=');
        data[item[0]] = item[1];
    }
    return data;
};

/**
 * Get data from url
 * @param  {String} url
 * @return {Object}
 */
OAuth.prototype.deParamUrl = function(url) {
    var tmp = url.split('?');

    if (tmp.length === 1)
        return {};

    return this.deParam(tmp[1]);
};

/**
 * Percent Encode
 * @param  {String} str
 * @return {String} percent encoded string
 */
OAuth.prototype.percentEncode = function(str) {
    return encodeURIComponent(str)
        .replace(/\!/g, "%21")
        .replace(/\*/g, "%2A")
        .replace(/\'/g, "%27")
        .replace(/\(/g, "%28")
        .replace(/\)/g, "%29");
};

/**
 * Percent Encode Object
 * @param  {Object} data
 * @return {Object} percent encoded data
 */
OAuth.prototype.percentEncodeData = function(data) {
    var result = {};

    for(var key in data) {
        result[this.percentEncode(key)] = this.percentEncode(data[key]);
    }

    return result;
};

/**
 * Get OAuth data as Header
 * @param  {Object} oauth_data
 * @return {String} Header data key - value
 */
OAuth.prototype.toHeader = function(oauth_data) {
    oauth_data = this.sortObject(oauth_data);

    var header_value = 'OAuth ';

    for(var key in oauth_data) {
        if (key.indexOf('oauth_') === -1)
            continue;
        header_value += this.percentEncode(key) + '="' + this.percentEncode(oauth_data[key]) + '"' + this.parameter_seperator;
    }

    return {
        Authorization: header_value.substr(0, header_value.length - this.parameter_seperator.length) //cut the last chars
    };
};

/**
 * Create a random word characters string with input length
 * @return {String} a random word characters string
 */
OAuth.prototype.getNonce = function(len) {
    var word_characters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
    var result = '';
    if (!len) len = this.nonce_length;

    for(var i = 0; i < len; i++) {
        result += word_characters[parseInt(Math.random() * word_characters.length, 10)];
    }

    return result;
};

/**
 * Get Current Unix TimeStamp
 * @return {Int} current unix timestamp
 */
OAuth.prototype.getTimeStamp = function() {
    return parseInt(new Date().getTime()/1000, 10);
};

////////////////////// HELPER FUNCTIONS //////////////////////

/**
 * Merge object
 * @param  {Object} obj1
 * @param  {Object} obj2
 * @return {Object}
 */
OAuth.prototype.mergeObject = function(obj1, obj2) {
    var merged_obj = obj1;
    for(var key in obj2) {
        merged_obj[key] = obj2[key];
    }
    return merged_obj;
};

/**
 * Sort object by key
 * @param  {Object} data
 * @return {Object} sorted object
 */
OAuth.prototype.sortObject = function(data) {
    var keys = Object.keys(data);
    var result = {};

    keys.sort();

    for(var i = 0; i < keys.length; i++) {
        var key = keys[i];
        result[key] = data[key];
    }

    return result;
};

/**
 *  CryptoJS
 *  Source : https://code.google.com/p/crypto-js/
 */


/*
CryptoJS v3.1.2
code.google.com/p/crypto-js
(c) 2009-2013 by Jeff Mott. All rights reserved.
code.google.com/p/crypto-js/wiki/License
*/
var CryptoJS=CryptoJS||function(g,l){var e={},d=e.lib={},m=function(){},k=d.Base={extend:function(a){m.prototype=this;var c=new m;a&&c.mixIn(a);c.hasOwnProperty("init")||(c.init=function(){c.$super.init.apply(this,arguments)});c.init.prototype=c;c.$super=this;return c},create:function(){var a=this.extend();a.init.apply(a,arguments);return a},init:function(){},mixIn:function(a){for(var c in a)a.hasOwnProperty(c)&&(this[c]=a[c]);a.hasOwnProperty("toString")&&(this.toString=a.toString)},clone:function(){return this.init.prototype.extend(this)}},
p=d.WordArray=k.extend({init:function(a,c){a=this.words=a||[];this.sigBytes=c!=l?c:4*a.length},toString:function(a){return(a||n).stringify(this)},concat:function(a){var c=this.words,q=a.words,f=this.sigBytes;a=a.sigBytes;this.clamp();if(f%4)for(var b=0;b<a;b++)c[f+b>>>2]|=(q[b>>>2]>>>24-8*(b%4)&255)<<24-8*((f+b)%4);else if(65535<q.length)for(b=0;b<a;b+=4)c[f+b>>>2]=q[b>>>2];else c.push.apply(c,q);this.sigBytes+=a;return this},clamp:function(){var a=this.words,c=this.sigBytes;a[c>>>2]&=4294967295<<
32-8*(c%4);a.length=g.ceil(c/4)},clone:function(){var a=k.clone.call(this);a.words=this.words.slice(0);return a},random:function(a){for(var c=[],b=0;b<a;b+=4)c.push(4294967296*g.random()|0);return new p.init(c,a)}}),b=e.enc={},n=b.Hex={stringify:function(a){var c=a.words;a=a.sigBytes;for(var b=[],f=0;f<a;f++){var d=c[f>>>2]>>>24-8*(f%4)&255;b.push((d>>>4).toString(16));b.push((d&15).toString(16))}return b.join("")},parse:function(a){for(var c=a.length,b=[],f=0;f<c;f+=2)b[f>>>3]|=parseInt(a.substr(f,
2),16)<<24-4*(f%8);return new p.init(b,c/2)}},j=b.Latin1={stringify:function(a){var c=a.words;a=a.sigBytes;for(var b=[],f=0;f<a;f++)b.push(String.fromCharCode(c[f>>>2]>>>24-8*(f%4)&255));return b.join("")},parse:function(a){for(var c=a.length,b=[],f=0;f<c;f++)b[f>>>2]|=(a.charCodeAt(f)&255)<<24-8*(f%4);return new p.init(b,c)}},h=b.Utf8={stringify:function(a){try{return decodeURIComponent(escape(j.stringify(a)))}catch(c){throw Error("Malformed UTF-8 data");}},parse:function(a){return j.parse(unescape(encodeURIComponent(a)))}},
r=d.BufferedBlockAlgorithm=k.extend({reset:function(){this._data=new p.init;this._nDataBytes=0},_append:function(a){"string"==typeof a&&(a=h.parse(a));this._data.concat(a);this._nDataBytes+=a.sigBytes},_process:function(a){var c=this._data,b=c.words,f=c.sigBytes,d=this.blockSize,e=f/(4*d),e=a?g.ceil(e):g.max((e|0)-this._minBufferSize,0);a=e*d;f=g.min(4*a,f);if(a){for(var k=0;k<a;k+=d)this._doProcessBlock(b,k);k=b.splice(0,a);c.sigBytes-=f}return new p.init(k,f)},clone:function(){var a=k.clone.call(this);
a._data=this._data.clone();return a},_minBufferSize:0});d.Hasher=r.extend({cfg:k.extend(),init:function(a){this.cfg=this.cfg.extend(a);this.reset()},reset:function(){r.reset.call(this);this._doReset()},update:function(a){this._append(a);this._process();return this},finalize:function(a){a&&this._append(a);return this._doFinalize()},blockSize:16,_createHelper:function(a){return function(b,d){return(new a.init(d)).finalize(b)}},_createHmacHelper:function(a){return function(b,d){return(new s.HMAC.init(a,
d)).finalize(b)}}});var s=e.algo={};return e}(Math);
(function(){var g=CryptoJS,l=g.lib,e=l.WordArray,d=l.Hasher,m=[],l=g.algo.SHA1=d.extend({_doReset:function(){this._hash=new e.init([1732584193,4023233417,2562383102,271733878,3285377520])},_doProcessBlock:function(d,e){for(var b=this._hash.words,n=b[0],j=b[1],h=b[2],g=b[3],l=b[4],a=0;80>a;a++){if(16>a)m[a]=d[e+a]|0;else{var c=m[a-3]^m[a-8]^m[a-14]^m[a-16];m[a]=c<<1|c>>>31}c=(n<<5|n>>>27)+l+m[a];c=20>a?c+((j&h|~j&g)+1518500249):40>a?c+((j^h^g)+1859775393):60>a?c+((j&h|j&g|h&g)-1894007588):c+((j^h^
g)-899497514);l=g;g=h;h=j<<30|j>>>2;j=n;n=c}b[0]=b[0]+n|0;b[1]=b[1]+j|0;b[2]=b[2]+h|0;b[3]=b[3]+g|0;b[4]=b[4]+l|0},_doFinalize:function(){var d=this._data,e=d.words,b=8*this._nDataBytes,g=8*d.sigBytes;e[g>>>5]|=128<<24-g%32;e[(g+64>>>9<<4)+14]=Math.floor(b/4294967296);e[(g+64>>>9<<4)+15]=b;d.sigBytes=4*e.length;this._process();return this._hash},clone:function(){var e=d.clone.call(this);e._hash=this._hash.clone();return e}});g.SHA1=d._createHelper(l);g.HmacSHA1=d._createHmacHelper(l)})();
(function(){var g=CryptoJS,l=g.enc.Utf8;g.algo.HMAC=g.lib.Base.extend({init:function(e,d){e=this._hasher=new e.init;"string"==typeof d&&(d=l.parse(d));var g=e.blockSize,k=4*g;d.sigBytes>k&&(d=e.finalize(d));d.clamp();for(var p=this._oKey=d.clone(),b=this._iKey=d.clone(),n=p.words,j=b.words,h=0;h<g;h++)n[h]^=1549556828,j[h]^=909522486;p.sigBytes=b.sigBytes=k;this.reset()},reset:function(){var e=this._hasher;e.reset();e.update(this._iKey)},update:function(e){this._hasher.update(e);return this},finalize:function(e){var d=
this._hasher;e=d.finalize(e);d.reset();return d.finalize(this._oKey.clone().concat(e))}})})();

/*
CryptoJS v3.1.2
code.google.com/p/crypto-js
(c) 2009-2013 by Jeff Mott. All rights reserved.
code.google.com/p/crypto-js/wiki/License
*/
(function(){var h=CryptoJS,j=h.lib.WordArray;h.enc.Base64={stringify:function(b){var e=b.words,f=b.sigBytes,c=this._map;b.clamp();b=[];for(var a=0;a<f;a+=3)for(var d=(e[a>>>2]>>>24-8*(a%4)&255)<<16|(e[a+1>>>2]>>>24-8*((a+1)%4)&255)<<8|e[a+2>>>2]>>>24-8*((a+2)%4)&255,g=0;4>g&&a+0.75*g<f;g++)b.push(c.charAt(d>>>6*(3-g)&63));if(e=c.charAt(64))for(;b.length%4;)b.push(e);return b.join("")},parse:function(b){var e=b.length,f=this._map,c=f.charAt(64);c&&(c=b.indexOf(c),-1!=c&&(e=c));for(var c=[],a=0,d=0;d<
e;d++)if(d%4){var g=f.indexOf(b.charAt(d-1))<<2*(d%4),h=f.indexOf(b.charAt(d))>>>6-2*(d%4);c[a>>>2]|=(g|h)<<24-8*(a%4);a++}return j.create(c,a)},_map:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="}})();



/*
EventEmitter
Source: https://github.com/benjreinhart/node-event-emitter
 */
(function(b){function a(b,d){if({}.hasOwnProperty.call(a.cache,b))return a.cache[b];var e=a.resolve(b);if(!e)throw new Error('Failed to resolve module '+b);var c={id:b,require:a,filename:b,exports:{},loaded:!1,parent:d,children:[]};d&&d.children.push(c);var f=b.slice(0,b.lastIndexOf('/')+1);return a.cache[b]=c.exports,e.call(c.exports,c,c.exports,f,b),c.loaded=!0,a.cache[b]=c.exports}a.modules={},a.cache={},a.resolve=function(b){return{}.hasOwnProperty.call(a.modules,b)?a.modules[b]:void 0},a.define=function(b,c){a.modules[b]=c},a.define('/index.js',function(c,d,e,f){function b(){b.init.call(this)}var a={};a.isObject=function a(b){return typeof b==='object'&&b!==null},a.isNumber=function a(b){return typeof b==='number'},a.isUndefined=function a(b){return b===void 0},a.isFunction=function a(b){return typeof b==='function'},c.exports=b,b.EventEmitter=b,b.prototype._events=undefined,b.prototype._maxListeners=undefined,b.defaultMaxListeners=10,b.init=function(){this._events=this._events||{},this._maxListeners=this._maxListeners||undefined},b.prototype.setMaxListeners=function(b){if(!a.isNumber(b)||b<0||isNaN(b))throw TypeError('n must be a positive number');return this._maxListeners=b,this},b.prototype.emit=function(h){var f,c,d,e,b,g;if(this._events||(this._events={}),h==='error'&&!this._events.error&&false)throw f=arguments[1],f instanceof Error?f:Error('Uncaught, unspecified "error" event.');if(c=this._events[h],a.isUndefined(c))return!1;if(a.isFunction(c))switch(arguments.length){case 1:c.call(this);break;case 2:c.call(this,arguments[1]);break;case 3:c.call(this,arguments[1],arguments[2]);break;default:d=arguments.length;e=new Array(d-1);for(b=1;b<d;b++)e[b-1]=arguments[b];c.apply(this,e)}else if(a.isObject(c)){for(d=arguments.length,e=new Array(d-1),b=1;b<d;b++)e[b-1]=arguments[b];for(g=c.slice(),d=g.length,b=0;b<d;b++)g[b].apply(this,e)}return!0},b.prototype.addListener=function(c,d){var e;if(!a.isFunction(d))throw TypeError('listener must be a function');if(this._events||(this._events={}),this._events.newListener&&this.emit('newListener',c,a.isFunction(d.listener)?d.listener:d),this._events[c]?a.isObject(this._events[c])?this._events[c].push(d):this._events[c]=[this._events[c],d]:this._events[c]=d,a.isObject(this._events[c])&&!this._events[c].warned){var e;a.isUndefined(this._maxListeners)?e=b.defaultMaxListeners:e=this._maxListeners,e&&e>0&&this._events[c].length>e&&(this._events[c].warned=!0,a.isFunction(console.error)&&console.error('(node) warning: possible EventEmitter memory leak detected. %d listeners added. Use emitter.setMaxListeners() to increase limit.',this._events[c].length),a.isFunction(console.trace)&&console.trace())}return this},b.prototype.on=b.prototype.addListener,b.prototype.once=function(e,b){function c(){this.removeListener(e,c),d||(d=!0,b.apply(this,arguments))}if(!a.isFunction(b))throw TypeError('listener must be a function');var d=!1;return c.listener=b,this.on(e,c),this},b.prototype.removeListener=function(d,c){var b,f,g,e;if(!a.isFunction(c))throw TypeError('listener must be a function');if(!(this._events&&this._events[d]))return this;if(b=this._events[d],g=b.length,f=-1,b===c||a.isFunction(b.listener)&&b.listener===c)delete this._events[d],this._events.removeListener&&this.emit('removeListener',d,c);else if(a.isObject(b)){for(e=g;e-->0;)if(b[e]===c||b[e].listener&&b[e].listener===c){f=e;break}if(f<0)return this;b.length===1?(b.length=0,delete this._events[d]):b.splice(f,1),this._events.removeListener&&this.emit('removeListener',d,c)}return this},b.prototype.removeAllListeners=function(c){var d,b;if(!this._events)return this;if(!this._events.removeListener)return arguments.length===0?this._events={}:this._events[c]&&delete this._events[c],this;if(arguments.length===0){for(d in this._events){if(d==='removeListener')continue;this.removeAllListeners(d)}return this.removeAllListeners('removeListener'),this._events={},this}if(b=this._events[c],a.isFunction(b))this.removeListener(c,b);else if(Array.isArray(b))while(b.length)this.removeListener(c,b[b.length-1]);return delete this._events[c],this},b.prototype.listeners=function(b){var c;return this._events&&this._events[b]?a.isFunction(this._events[b])?c=[this._events[b]]:c=this._events[b].slice():c=[],c},b.listenerCount=function(b,d){var c;return b._events&&b._events[d]?a.isFunction(b._events[d])?c=1:c=b._events[d].length:c=0,c}}),b.EventEmitter=a('/index.js')}.call(this,this))

/**
 *  Microgear JS library
 *  More info available at : netpie.io
 */

if (typeof Microgear === "undefined") {
	Microgear = {};
}

Microgear.create = function(param) {
    var gkey = param.key || param.gearkey || "";
	var gsecret = param.secret || param.gearsecret || "";
    var galias = param.alias || param.gearalias || "";

	if (!param) return;
	var scope = param.scope;	
	var self = null;

	var _microgear = function(gearkey,gearsecret,gearalias) {
		this.securemode = USETLS;
		this.gearkey = gearkey;
		this.gearsecret = gearsecret;
	    this.gearalias = gearalias?gearalias.substring(0,16):null;
		this.client = null;
		this.subscriptions = [];
		this.messageBuffer = [];
		this.requesttoken = {};
		this.accesstoken = {};
	};

	var bucket = {};
	var storage = {
		get : function(key) {			
			if (storejs.enabled) return storejs.get(key);
			else return bucket[key];
		},
		set : function(key, val) {
			if (storejs.enabled) storejs.set(key,val);
			else bucket[key] = val;
		}
	};

	function extract(response) {
		var out = {};
		var arr = response.split('&');
		for (var i=0; i<arr.length; i++) {
			var a = arr[i].split('=');
			out[a[0]] = a[1];
		}
		return out;
	}

	function validateLocalStorage() {
		/*
		if (!storage.enabled) {
			alert('Warning: HTML5 localstorage is not available on this browser.');
			return false;
		}
		else return true;
		*/
		return true;
	}

	function jsonparse(jsontext) {
		var jsonobj;
		try {
			jsonobj = JSON.parse(jsontext);
		}
		catch(e) {
			return null;
		}
		return jsonobj;
	}

	function createCORSRequest(method, url) {
	  var xhr = new XMLHttpRequest();
	  if ("withCredentials" in xhr) {

	    // Check if the XMLHttpRequest object has a "withCredentials" property.
	    // "withCredentials" only exists on XMLHTTPRequest2 objects.
	    xhr.open(method, url, true);

	  }
	  else if (typeof XDomainRequest != "undefined") {
	    // Otherwise, check if XDomainRequest.
	    // XDomainRequest only exists in IE, and is IE's way of making CORS requests.
	    xhr = new XDomainRequest();
	    xhr.open(method, url);
	  }
	  else {
	    // Otherwise, CORS is not supported by the browser.
	    xhr = null;
	  }
	  return xhr;
	}

	_microgear.prototype = new EventEmitter;

	_microgear.prototype.createtoken = function(callback) {

		/* consumer key & secret */
		var oauth = OAuth({
		    consumer: {
				public: self.gearkey,
				secret: self.gearsecret
			},
		    signature_method: 'HMAC-SHA1'
		});

		if (validateLocalStorage() && (!self.accesstoken || !self.accesstoken.token)) {
			var skey = storage.get("microgear."+self.gearkey+".key");
			if (skey && skey!=self.gearkey) {
				self.resettoken();
			}
			self.accesstoken = jsonparse(storage.get("microgear."+self.gearkey+".accesstoken"));
		}

		if (self.accesstoken && self.accesstoken.token && self.accesstoken.secret && self.accesstoken.endpoint) {
			if (typeof(callback)=='function') callback(3);
		}
		else {
			var gearauthurl;

			if (self.securemode) gearauthurl = 'https://'+GEARAUTH+':'+GEARAPISECUREPORT;
			else gearauthurl = 'http://'+GEARAUTH+':'+GEARAPIPORT;

			if (!self.requesttoken && validateLocalStorage()) {
				var skey = storage.get("microgear."+self.gearkey+".key");
				if (skey && skey!=self.gearkey) {
					self.resettoken();
				}
				self.requesttoken = jsonparse(storage.get("microgear."+self.gearkey+".requesttoken"));
			}
			if (self.requesttoken && self.requesttoken.token && self.requesttoken.secret) {

				var request_data = {
				    url: gearauthurl+'/api/atoken',
				    method: 'POST',
				    data: {
						oauth_verifier: self.requesttoken.verifier
				    }
				};
				var http = createCORSRequest(request_data.method, request_data.url);
				if (!http) {
					throw new Error('CORS not supported');
				}
				var reqtok = {
				    public: self.requesttoken.token,
				    secret: self.requesttoken.secret
				};

				http.setRequestHeader("Authorization", oauth.toHeader(oauth.authorize(request_data, reqtok)).Authorization);
				http.send();

				http.onreadystatechange = function() {//Call a function when the state changes.
			    	if(http.readyState == 4) {
			    		switch (http.status) {
			    			case 200 :
						        	var r = extract(http.responseText);
						        	self.accesstoken = {};
									self.accesstoken.token = r.oauth_token;
						        	self.accesstoken.secret = r.oauth_token_secret;
						        	self.accesstoken.endpoint = unescape(r.endpoint);
			    					// generate revokecode
									var hkey = self.accesstoken.secret+'&'+self.gearsecret;
								    var revokecode = CryptoJS.HmacSHA1(self.accesstoken.token,hkey).toString(CryptoJS.enc.Base64).replace(/\//g,'_');
						        	self.accesstoken.revokecode = unescape(revokecode);

						        	if (r.flag != 'S') {
										if (validateLocalStorage()) {
											storage.set("microgear."+self.gearkey+".key", self.gearkey);
											storage.set("microgear."+self.gearkey+".accesstoken", JSON.stringify(self.accesstoken));
										}
									}

									if (typeof(callback)=='function') callback(2);
			    					break;

							case 401:	// not authorized yet
									self.emit('error',{code:401, message:"Not authorized"});
									if (callback) callback(1);
									break;
							case 500:	// eg. 500 request token not found
									self.emit('error',{status:500, message:"Request token invalid"});
									if (typeof(callback)=='function') callback(0);
			    					break;

			    			default :
									self.emit('error',{status:503, message:"Cannot obtain a token"});
									if (typeof(callback)=='function') callback(0);
			    					break;
			    		}
				    }
				}
			}
			else {

	            var verifier;
	            if (this.gearalias) verifier = this.gearalias;
	            else verifier = MGREV;

				var request_data = {
					url : gearauthurl+'/api/rtoken',
				    method: 'POST',
				    data: {
						oauth_callback: 'scope=&appid='+self.appid+'&mgrev='+MGREV+'&verifier='+verifier,
				    }
				};
				var http = createCORSRequest(request_data.method, request_data.url);
				if (!http) {
					throw new Error('CORS not supported');
				}
				http.setRequestHeader("Authorization", oauth.toHeader(oauth.authorize(request_data)).Authorization);
				http.send();

				http.onreadystatechange = function() {//Call a function when the state changes.
			    	if(http.readyState == 4) {
			    		switch (http.status) {
			    			case 200 :
						        	var r = extract(http.responseText);
						        	self.requesttoken = {};
						        	self.requesttoken.token = r.oauth_token;
						        	self.requesttoken.secret = r.oauth_token_secret;
						        	self.requesttoken.verifier = verifier;

									if (validateLocalStorage()) {
										storage.set("microgear."+self.gearkey+".requesttoken", JSON.stringify(self.requesttoken));
									}

									if (typeof(callback)=='function') callback(1);
			    					break;

			    			default :
									self.emit('error',{status:503, message:"Cannot obtain a token"});
									if (typeof(callback)=='function') callback(0);
			    					break;
			    		}
				    }
				}
			}
		}
	};

	_microgear.prototype.brokerconnect = function(callback) {
		var hkey = self.accesstoken.secret+'&'+self.gearsecret;
		var mqttusername = self.gearkey+'%'+Math.floor(Date.now()/1000);
		//var mqttpassword = crypto.createHmac('sha1', hkey).update(this.accesstoken.token+'%'+mqttuser).digest('base64');
	    var mqttpassword = CryptoJS.HmacSHA1(self.accesstoken.token+'%'+mqttusername, hkey).toString(CryptoJS.enc.Base64);
		var b = self.accesstoken.endpoint.substr(6).split(':');

	//	self.client = new Paho.MQTT.Client(b[0], Number(8083), self.accesstoken.token);
		var wsport;
		if (self.securemode) wsport = GBWSSPORT;
		else wsport = GBWSPORT;

		self.client = new Paho.MQTT.Client(b[0], Number(wsport), self.accesstoken.token);
		self.client.onConnectionLost = _onConnectionLost;
		self.client.onMessageArrived = _onMessageArrived;
		self.client.onError = _onError;
		self.client.connect({userName: mqttusername,password: mqttpassword, useSSL: self.securemode, onSuccess:_onConnect});
	};

	function initiateconnection(done) {
		self.lastretryconnection = Date.now();
		self.createtoken(function(state) {
			self.mgstate = state;
			switch (state) {
				case 0 : 	/* No token issue */
							if (self.appkey || self.secret)
								throw new Error('Error: request token is not issued, please check your appkey and appsecret');
							else
								throw new Error('Error: request token is not issued, please check your consumerkey and consumersecret');
							return;
				case 1 :	/* Request token issued or prepare to request request token again */
							/*
							setTimeout(function() {
								if (toktime < MAXTOKDELAYTIME) toktime *= 2;
								initiateconnection(done);
							},toktime);
							*/
							initiateconnection(done);
							return;
				case 2 :	/* Access token issued */
							initiateconnection(done);
							//toktime = 1;
							return;
				case 3 :	/* Has access token ready for connecting broker */
							//toktime = 1;
							self.brokerconnect(function() {
								if (done) done();
							});
							return;
			}
		});
	}

	function _onConnect() {
		for(var i=0; i<self.subscriptions.length; i++) {
			if (self.debugmode) console.log('auto subscribe '+self.subscriptions[i]);
			self.client.subscribe('/'+self.appid+self.subscriptions[i]);
		}

		/* subscribe for control messages */
		self.client.subscribe('/&id/'+self.clientid+'/#');

		if (self.listeners('present')) {
			self.client.subscribe('/'+self.appid+'/&present');
		}
		if (self.listeners('absent')) {
			self.client.subscribe('/'+self.appid+'/&absent');
		}

        if (self.gearalias) {
            self.setalias(self.gearalias);
        }

		self.emit('connected');

		var timer = setInterval(function() {
			if (self.messageBuffer.length > 0) {
			var message = self.messageBuffer.shift();
			message.destinationName = '/'+self.appid + message.destinationName;
			self.client.send(message);
			}
			else clearInterval(timer);
		}, 200);
	}

	function _onError(err) {
		//console.log(JSON.stringify(err));
		if (err.code == 4) {
			self.emit('info','invalid token, requesting a new one');
			if (validateLocalStorage()) {
				self.requesttoken = {};
				self.accesstoken = {};
				storage.set("microgear."+self.gearkey+".key", "");
				storage.set("microgear."+self.gearkey+".accesstoken", JSON.stringify({}));
				storage.set("microgear."+self.gearkey+".requesttoken", JSON.stringify({}));
			}
		}
	}

	function _onMessageArrived(msg) {
		var topic = msg.destinationName;
		var message = msg.payloadString;
		var plen = self.appid.length +1;
		var rtop = topic.substr(plen,topic.length-plen);

		if (rtop.substr(0,2)=='/&') {
			var p = (rtop.substr(1,rtop.length-1)+'/').indexOf('/');
			var ctop = rtop.substr(2,p);
			switch (ctop) {
                case 'present' :
                case 'absent'  :
                            var pm;
                            try {
                                pm = JSON.parse(message.toString());
                            }
                            catch(e) {
                                pm = message.toString();
                            }
                        self.emit(ctop, pm);
                        break;
                case 'resetendpoint' :
	                        if (self.accesstoken && self.accesstoken.endpoint) {
	                            self.accesstoken.endpoint = "";
								storage.set("microgear."+self.gearkey+".accesstoken", JSON.stringify(self.accesstoken));
	                            self.emit('info','endpoint reset');
	                        }
	                        break;
			}
		}
		else if (topic.substr(0,1)=='@') {
			switch (topic) {
				case '@info' : 	self.emit('info',message);
								break;
				case '@error' : self.emit('error',message);
								break;
			}
		}
		else {
			self.emit('message',topic,message);
		}
	}

	function _onConnectionLost(responseObject) {
		self.emit('disconnected');
	}

	// connection monitor loop
	function monloop() {
		if (self && self.onlinemode && self.client && !self.client.isConnected()) {
			if (Date.now() - self.lastretryconnection > RETRYCONNECTIONINTERVAL) {
				self.lastretryconnection = Date.now();
				initiateconnection(function() {
				});
			}
		}
	}
	setInterval(monloop,MONLOOPINTERVAL);

	_microgear.prototype.connect = function(_appid, done) {
		this.onlinemode = true;
		self.appid = _appid;
		initiateconnection(done);
	};

	_microgear.prototype.disconnect = function() {
		this.onlinemode = false;
		self.client.disconnect();

	};

	_microgear.prototype.subscribe = function(topic) {
		if (self.client && self.client.isConnected()) {
			if (self.subscriptions.indexOf(topic) < 0) {
				self.client.subscribe('/'+self.appid+topic,{
					onSuccess : function(res) {
						if (self.subscriptions.indexOf(topic) < 0) {
							self.subscriptions.push(topic);
						}
					},
					onFailure : function(res) {

					}
				});

			}	
		}
		else {
			if (self.subscriptions.indexOf(topic) < 0) {
				self.subscriptions.push(topic);
			}
		}
	};

	_microgear.prototype.unsubscribe = function(topic,callback) {
		if (self.client && self.client.isConnected()) {
			self.client.unsubscribe('/'+self.appid+topic,{
				onSuccess : function(res) {
					if (self.subscriptions.indexOf(topic) < 0) {
						self.subscriptions.splice(self.subscriptions.indexOf(topic));
					}
				},
				onFailure : function(res) {

				}
			});
		}
		else {
			if (self.subscriptions.indexOf(topic) >= 0) {
				self.subscriptions.splice(self.subscriptions.indexOf(topic));
			}
		}
	};

	_microgear.prototype.publish = function(_topic,_msg,_retained) {
		var str_msg = '';

		if (typeof(_msg)=='undefined') return;
		else if (typeof(_msg)=='object') str_msg = JSON.stringify(_msg);
		else str_msg = _msg.toString();

		var message = new Paho.MQTT.Message(str_msg);
		if (_retained) message.retained = true;

		if (self.client && self.client.isConnected()) {
			message.destinationName = '/'+self.appid+_topic;
			self.client.send(message);
		}
		else {
			if (self.messageBuffer.length < MESSAGEBUFFERSIZE) {
				message.destinationName = _topic;
				self.messageBuffer.push(message);
			}
		}
	};

	/**
	 * Deprecated	
	*/
	_microgear.prototype.setname = function(gearname) {
		if (self.gearname) self.unsubscribe('/gearname/'+self.gearname);
		self.subscribe('/gearname/'+gearname, function() {
			self.gearname = gearname;
			if (typeof(callback) == 'function') callback();
		});
	};

	_microgear.prototype.setalias = function (gearalias, callback) {
	    self.publish('/@setalias/'+gearalias, "", {}, function() {
	       self.gearalias = gearalias;
	       if (typeof(callback) == 'function') callback();
	    });
	};

	_microgear.prototype.unsetname = function (callback) {
		if (self.gearname != null) {
			self.unsubscribe('/gearname/'+self.gearname, function() {
				self.gearname = null;
				if (typeof(callback) == 'function') callback();
			});
		}
	};

	_microgear.prototype.writefeed = function (feedid, datajson, apikey) {
		var cmd = '/@writefeed/'+feedid;
		if (apikey) cmd += '/'+apikey;

		if (typeof(datajson) == 'object') datajson = JSON.stringify(datajson);
		else datajson = datajson.toString();

	    self.publish(cmd,datajson);
	};

	_microgear.prototype.chat = function (gearname, message, callback) {
		self.publish('/gearname/'+gearname, message, callback);
	};

	_microgear.prototype.gettoken = function() {
		var tok = {token:self.accesstoken.token, secret:self.accesstoken.secret};
		console.log(tok);
		return tok;
	};

	_microgear.prototype.resettoken = function (callback) {
		var atok = jsonparse(storage.get("microgear."+self.gearkey+".accesstoken"));
		if (atok && atok.token && atok.revokecode) {
			var xmlHttp = new XMLHttpRequest();
		    xmlHttp.onreadystatechange = function() { 
				if(xmlHttp.readyState == 4) {
			    		switch (xmlHttp.status) {
			    			case 200 :
									if (xmlHttp.responseText != 'FAILED') {
		 								if (validateLocalStorage()) {
											self.requesttoken = {};
											self.accesstoken = {};
											storage.set("microgear."+self.gearkey+".key", "");
											storage.set("microgear."+self.gearkey+".accesstoken", JSON.stringify({}));
											storage.set("microgear."+self.gearkey+".requesttoken", JSON.stringify({}));
										}
									}
									if (typeof(callback)=='function') callback();
									break;
							default :
									self.emit('error','Reset token error : '+xmlHttp.responseText);
									if (typeof(callback)=='function') callback(xmlHttp.responseText);
									break;
						}
			    }		
			};

			var apiurl, gearauthurl;
			var revokecode = atok.revokecode.replace(/\//g,'_');

			if (self.securemode) gearauthurl = 'https://'+GEARAUTH+':'+GEARAPISECUREPORT;
			else gearauthurl = 'http://'+GEARAUTH+':'+GEARAPIPORT;

	        apiurl = gearauthurl+'/api/revoke/'+atok.token+'/'+revokecode;
			xmlHttp.open("GET", apiurl, true); //true for asynchronous 
	    	xmlHttp.send(null);
		}
		else {
			if (typeof(callback)=='function') callback();
		}
	};

	_microgear.prototype.on('newListener', function(event,listener) {
		switch (event) {
			case 'present' :
					if (self.client) {
						if (self.client.isConnected()) {
							self.subscribe('/@present');
						}
					}
					break;
			case 'absent' :
					if (self.client) {
						if (self.client.isConnected()) {
							self.subscribe('/@absent');
						}
					}
					break;
		}
	});

	_microgear.prototype.usetls = function(tls) {
		self.securemode = tls;
	};

	_microgear.prototype.connected = function() {
		if (self.client) {
			return self.client.isConnected();
		}
		else return false;
	}

	_microgear.prototype.setconfig = function(key,value) {
		switch(key) {
			case 'GEARAUTH' : 	GEARAUTH = value.toString();
								break;
		}
	}

	_microgear.prototype.getconfig = function(key) {
		switch(key) {
			case 'GEARAUTH' : 	return GEARAUTH;
								break;
		}
	}

	_microgear.prototype.pushowner = function(msg) {
		self.publish('/@push/owner', msg);
	}

	_microgear.prototype.setName = _microgear.prototype.setname;
	_microgear.prototype.unsetName = _microgear.prototype.unsetname;
	_microgear.prototype.setAlias = _microgear.prototype.setalias;
	_microgear.prototype.writeFeed = _microgear.prototype.writefeed;
	_microgear.prototype.getToken = _microgear.prototype.gettoken;
	_microgear.prototype.resetToken = _microgear.prototype.resettoken;
	_microgear.prototype.useTLS = _microgear.prototype.usetls;
	_microgear.prototype.setConfig = _microgear.prototype.setconfig;
	_microgear.prototype.getConfig = _microgear.prototype.getconfig;
	_microgear.prototype.pushOwner = _microgear.prototype.pushowner;

	if (gkey && gsecret) {
		var mg = new _microgear(gkey,gsecret,galias);
		mg.scope = param.scope;
		self = mg;
		return mg;
	}
	else {	
		return null;
	}
};