微信小程序使用mqtt
微信小程序使用mqtt，成功链接
准备：
nginx 下载
wget http://nginx.org/download/nginx-1.6.2.tar.gz
nginx 新增模块
wget https://github.com/openresty/headers-more-nginx-module/archive/v0.33.tar.gz
libwebsockets 模块
wget https://github.com/warmcat/libwebsockets/archive/v3.2.2.tar.gz
mosquito 模块
wget https://mosquitto.org/files/source/mosquitto-1.6.8.tar.gz
安装：
基础依赖安装
sudo apt-get install cmake make zlib zlib-devel gcc-c++ libtool openssl openssl-devel
1.安转nginx
sudo mkdir /opt/nginx -- 解压nginx tar -xzvf nginx-1.13.6.tar.gz cd nginx-1.13.6/ --将nginx的新曾模块解压到上一层目录安装目录/opt/nginx
sudo ./configure --prefix=/opt/nginx --with-http_stub_status_module --with-http_ssl_module --with-http_proxy_module --add-module=../headers-more-nginx-module-0.33
sudo make sudo make install
安装libwebsockets 编译mosquito时需要
解压文件： tar -xzvf v3.2.2.tar.gz cd libwebsockets-3.2.2/ mkdir build cmake .. sudo make sudo make install 参考文档 https://blog.youkuaiyun.com/houjixin/article/details/79789448
安装mosquito
安装方案一 sudo apt-add-repository ppa:mosquitto-dev/mosquitto-ppa sudo apt-get update sudo apt-get install mosquitto 安装完成查看版本 mosquitto -V 安装方案二 wget https://mosquitto.org/files/source/mosquitto-1.6.8.tar.gz tar -xvzf mosquitto-1.6.8.tar.gz cd mosquitto-1.6.8/ make &&make install 参考 https://blog.youkuaiyun.com/russle/article/details/80469942
注意：make之前修改 config.mk 文件
WITH_WEBSOCKETS:=yes 改成yes
修改mosquito配置文件添加：
listener 8811 protocol websockets
启动mosquito
sudo mosquitto -c /etc/mosquitto/mosquitto.conf
修改nginx配置文件
server { server_name ****。**; location /mqtt/ { proxy_pass http://localhost:8811; proxy_redirect off; proxy_set_header Host localhost:8811; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "upgrade"; proxy_set_header Sec-WebSocket-Protocol mqtt; more_clear_headers Sec-WebSocket-Protocol; } # certbot生成 ssl on; listen 80; listen 443 ssl; # managed by Certbot ssl_certificate /etc/letsencrypt/live/I****。*/fullchain.pem; # managed by Certbot ssl_certificate_key /etc/letsencrypt/live/****。*/privkey.pem; # managed by Certbot include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot }
至此服务器端配置完成
小程序端：paho-mqtt.js
/******************************************************************************* * 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. /** * Send and receive messages using web browsers. * <p> * This programming interface lets a JavaScript client application use the MQTT V3.1 or * V3.1.1 protocol to connect to an MQTT-supporting messaging server. * * The function supported includes: * <ol> * <li>Connecting to and disconnecting from a server. The server is identified by its host name and port number. * <li>Specifying options that relate to the communications link with the server, * for example the frequency of keep-alive heartbeats, and whether SSL/TLS is required. * <li>Subscribing to and receiving messages from MQTT Topics. * <li>Publishing messages to MQTT Topics. * </ol> * <p> * The API consists of two main objects: * <dl> * <dt><b>{@link Paho.MQTT.Client}</b></dt> * <dd>This contains methods that provide the functionality of the API, * including provision of callbacks that notify the application when a message * arrives from or is delivered to the messaging server, * or when the status of its connection to the messaging server changes.</dd> * <dt><b>{@link Paho.MQTT.Message}</b></dt> * <dd>This encapsulates the payload of the message along with various attributes * associated with its delivery, in particular the destination to which it has * been (or is about to be) sent.</dd> * </dl> * <p> * The programming interface validates parameters passed to it, and will throw * an Error containing an error message intended for developer use, if it detects * an error with any parameter. * <p> * Example: * * <code><pre> client = new Paho.MQTT.Client(location.hostname, Number(location.port), "clientId"); client.onConnectionLost = onConnectionLost; client.onMessageArrived = onMessageArrived; client.connect({onSuccess:onConnect}); function onConnect() { // Once a connection has been made, make a subscription and send a message. console.log("onConnect"); client.subscribe("/World"); message = new Paho.MQTT.Message("Hello"); message.destinationName = "/World"; client.send(message); }; function onConnectionLost(responseObject) { if (responseObject.errorCode !== 0) console.log("onConnectionLost:"+responseObject.errorMessage); }; function onMessageArrived(message) { console.log("onMessageArrived:"+message.payloadString); client.disconnect(); }; * </pre></code> * @namespace Paho.MQTT */ /* jshint shadow:true */ (function ExportLibrary(root, factory) { if (typeof exports === 'object' && typeof module === 'object') { module.exports = factory(); } else if (typeof define === 'function' && define.amd) { define(factory); } else if (typeof exports === 'object') { exports = factory(); } else { if (typeof root.Paho === 'undefined') { root.Paho = {}; } root.Paho.MQTT = factory(); } })(global, function LibraryFactory() { var PahoMQTT = (function(wx) { // Private variables below, these are only visible inside the function closure // which is used to define the module. var version = "@VERSION@"; var buildLevel = "@BUILDLEVEL@"; /** * 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 validKey in keys) if (keys.hasOwnProperty(validKey)) errorStr = errorStr + " " + validKey; 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}." }, BUFFER_FULL: { code: 18, text: "AMQJS0018E Message buffer is full, maximum buffer size: {0}." }, }; /** 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 = []; var destinationNameLength = 0; var willMessagePayloadBytes; // 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. 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: break; } // 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 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: break; } 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, keepAliveInterval) { this._client = client; 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"); wx.sendSocketMessage({ data: pingReq, success: function() { // }, fail: function() { // }, complete: function() { // } }) this.timeout = setTimeout(doTimeout(this), this._keepAliveInterval); } }; this.reset = function() { this.isReset = true; clearTimeout(this.timeout); if (this._keepAliveInterval > 0) this.timeout = setTimeout(doTimeout(this), this._keepAliveInterval); }; this.cancel = function() { clearTimeout(this.timeout); }; }; /** * Monitor request completion. * @ignore */ var Timeout = function(client, timeoutSeconds, action, args) { 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() { 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) { 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; this._wsuri = null; // 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 = []; this._buffered_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 wx.getStorageInfoSync().keys) if (key.indexOf("Sent:" + this._localKey) === 0 || key.indexOf("Received:" + this._localKey) === 0) this.restore(key); }; // Messaging Client public instance members. ClientImpl.prototype.host = null; ClientImpl.prototype.port = null; ClientImpl.prototype.path = null; ClientImpl.prototype.uri = null; ClientImpl.prototype.clientId = null; // Messaging Client private instance members. ClientImpl.prototype.socket = null; /* 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 = null; ClientImpl.prototype.hostIndex = null; ClientImpl.prototype.onConnected = null; ClientImpl.prototype.onConnectionLost = null; ClientImpl.prototype.onMessageDelivered = null; ClientImpl.prototype.onMessageArrived = null; ClientImpl.prototype.traceFunction = null; ClientImpl.prototype._msg_queue = null; ClientImpl.prototype._buffered_msg_queue = null; ClientImpl.prototype._connectTimeout = null; /* 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._reconnectInterval = 1; // Reconnect Delay, starts at 1 second ClientImpl.prototype._reconnecting = false; ClientImpl.prototype._reconnectTimeout = null; ClientImpl.prototype.disconnectedPublishing = false; ClientImpl.prototype.disconnectedBufferSize = 5000; 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, null, this.connected); if (this.connected) throw new Error(format(ERROR.INVALID_STATE, ["already connected"])); if (this._reconnecting) { // connect() function is called while reconnect is in progress. // Terminate the auto reconnect process to use new connect options. this._reconnectTimeout.cancel(); this._reconnectTimeout = null; this._reconnecting = false; } this.connectOptions = connectOptions; this._reconnectInterval = 1; this._reconnecting = false; 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, errorMessage: format(errorCode) }); }; } if (subscribeOptions.timeout) { wireMessage.timeOut = new Timeout(this, 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, 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); var wireMessage = new WireMessage(MESSAGE_TYPE.PUBLISH); wireMessage.payloadMessage = message; if (this.connected) { // Mark qos 1 & 2 message as "ACK required" // For qos 0 message, invoke onMessageDelivered callback if there is one. // Then schedule the 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); } else { // Currently disconnected, will not schedule this message // Check if reconnecting is in progress and disconnected publish is enabled. if (this._reconnecting && this.disconnectedPublishing) { // Check the limit which include the "required ACK" messages var messageCount = Object.keys(this._sentMessages).length + this._buffered_msg_queue.length; if (messageCount > this.disconnectedBufferSize) { throw new Error(format(ERROR.BUFFER_FULL, [this.disconnectedBufferSize])); } else { if (message.qos > 0) { // Mark this message as "ACK required" this._requires_ack(wireMessage); } else { wireMessage.sequence = ++this._sequence; this._buffered_msg_queue.push(wireMessage); } } } else { throw new Error(format(ERROR.INVALID_STATE, ["not connected"])); } } }; ClientImpl.prototype.disconnect = function() { this._trace("Client.disconnect"); if (this._reconnecting) { // disconnect() function is called while reconnect is in progress. // Terminate the auto reconnect process. this._reconnectTimeout.cancel(); this._reconnectTimeout = null; this._reconnecting = false; } if (!this.connected) throw new Error(format(ERROR.INVALID_STATE, ["not connecting or connected"])); var 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._wsuri = wsurl; this.connected = false; wx.connectSocket({ url: wsurl }); wx.onSocketOpen(scope(this._on_socket_open, this)) wx.onSocketMessage(scope(this._on_socket_message, this)) wx.onSocketError(scope(this._on_socket_error, this)) wx.onSocketClose(scope(this._on_socket_close, this)) this.sendPinger = new Pinger(this, this.connectOptions.keepAliveInterval); this.receivePinger = new Pinger(this, this.connectOptions.keepAliveInterval); if (this._connectTimeout) { this._connectTimeout.cancel(); this._connectTimeout = null; } this._connectTimeout = new Timeout(this, 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])); } try { wx.setStorageSync(prefix + this._localKey + wireMessage.messageIdentifier, JSON.stringify(storedMessage)); } catch (e) { } }; ClientImpl.prototype.restore = function(key) { var value = wx.getStorageSync(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 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(res) { // 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); 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); var messages = []; 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; 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) { var errorStack = ((error.hasOwnProperty('stack') == 'undefined') ? error.stack.toString() : "No Error Stack Available"); this._disconnected(ERROR.INTERNAL_ERROR.code, format(ERROR.INTERNAL_ERROR, [error.message, errorStack])); 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 (this._reconnectTimeout) this._reconnectTimeout.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]; wx.removeStorageSync("Sent:" + this._localKey + sentMessage.messageIdentifier); } this._sentMessages = {}; for (var key in this._receivedMessages) { var receivedMessage = this._receivedMessages[key]; wx.removeStorageSync("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 { this._disconnected(ERROR.CONNACK_RETURNCODE.code, format(ERROR.CONNACK_RETURNCODE, [wireMessage.returnCode, CONNACK_RC[wireMessage.returnCode]])); break; } // Resend messages. var sequencedMessages = []; for (var msgId in this._sentMessages) { if (this._sentMessages.hasOwnProperty(msgId)) sequencedMessages.push(this._sentMessages[msgId]); } // Also schedule qos 0 buffered messages if any if (this._buffered_msg_queue.length > 0) { var msg = null; var fifo = this._buffered_msg_queue.reverse(); while ((msg = fifo.pop())) { sequencedMessages.push(msg); if (this.onMessageDelivered) this._notify_msg_sent[msg] = this.onMessageDelivered(msg.payloadMessage); } } // 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. // Will also now return if this connection was the result of an automatic // reconnect and which URI was successfully connected to. if (this.connectOptions.onSuccess) { this.connectOptions.onSuccess({ invocationContext: this.connectOptions.invocationContext }); } var reconnected = false; if (this._reconnecting) { reconnected = true; this._reconnectInterval = 1; this._reconnecting = false; } // Execute the onConnected callback if there is one. this._connected(reconnected, this._wsuri); // 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]; wx.removeStorageSync("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]; wx.removeStorageSync("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]; wx.removeStorageSync("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(); // This will need to be fixed when we add multiple topic support if (wireMessage.returnCode[0] === 0x80) { 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) { var errorStack = ((error.hasOwnProperty('stack') == 'undefined') ? error.stack.toString() : "No Error Stack Available"); this._disconnected(ERROR.INTERNAL_ERROR.code, format(ERROR.INTERNAL_ERROR, [error.message, errorStack])); return; } }; /** @ignore */ ClientImpl.prototype._on_socket_error = function(error) { if (!this._reconnecting) { this._disconnected(ERROR.SOCKET_ERROR.code, format(ERROR.SOCKET_ERROR, [error.data])); } }; /** @ignore */ ClientImpl.prototype._on_socket_close = function() { if (!this._reconnecting) { 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); wx.sendSocketMessage({ data: wireMessage.encode(), success: function() { // }, fail: function() { // }, complete: function() { // } }) /* 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 connected. * @param {reconnect} [boolean] indicate if this was a result of reconnect operation. * @param {uri} [string] fully qualified WebSocket URI of the server. */ ClientImpl.prototype._connected = function(reconnect, uri) { // Execute the onConnected callback if there is one. if (this.onConnected) this.onConnected(reconnect, uri); }; /** * Attempts to reconnect the client to the server. * For each reconnect attempt, will double the reconnect interval * up to 128 seconds. */ ClientImpl.prototype._reconnect = function() { this._trace("Client._reconnect"); if (!this.connected) { this._reconnecting = true; this.sendPinger.cancel(); this.receivePinger.cancel(); if (this._reconnectInterval < 128) this._reconnectInterval = this._reconnectInterval * 2; if (this.connectOptions.uris) { this.hostIndex = 0; this._doConnect(this.connectOptions.uris[0]); } else { this._doConnect(this.uri); } } }; /** * 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); if (errorCode !== undefined && this._reconnecting) { //Continue automatic reconnect process this._reconnectTimeout = new Timeout(this, this._reconnectInterval, this._reconnect); return; } this.sendPinger.cancel(); this.receivePinger.cancel(); if (this._connectTimeout) { this._connectTimeout.cancel(); this._connectTimeout = null; } // Clear message buffers. this._msg_queue = []; this._buffered_msg_queue = []; this._notify_msg_sent = {}; 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, reconnect: this.connectOptions.reconnect, uri: this._wsuri }); } if (errorCode !== ERROR.OK.code && this.connectOptions.reconnect) { // Start automatic reconnect process for the very first time since last successful connect. this._reconnectInterval = 1; this._reconnect(); return; } } 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.splice(i, 1, 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> * @property {function} onConnected - called when a connection is successfully made to the server. * after a connect() method. * Parameters passed to the onConnected callback are: * <ol> * <li>reconnect (boolean) - If true, the connection was the result of a reconnect.</li> * <li>URI (string) - The URI used to connect to the server.</li> * </ol> * @property {boolean} disconnectedPublishing - if set, will enable disconnected publishing in * in the event that the connection to the server is lost. * @property {number} disconnectedBufferSize - Used to set the maximum number of messages that the disconnected * buffer will hold before rejecting new messages. Default size: 5000 messages * @property {function} trace - called whenever trace is called. TODO */ 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._getOnConnected = function() { return client.onConnected; }; this._setOnConnected = function(newOnConnected) { if (typeof newOnConnected === "function") client.onConnected = newOnConnected; else throw new Error(format(ERROR.INVALID_TYPE, [typeof newOnConnected, "onConnected"])); }; this._getDisconnectedPublishing = function() { return client.disconnectedPublishing; }; this._setDisconnectedPublishing = function(newDisconnectedPublishing) { client.disconnectedPublishing = newDisconnectedPublishing; }; this._getDisconnectedBufferSize = function() { return client.disconnectedBufferSize; }; this._setDisconnectedBufferSize = function(newDisconnectedBufferSize) { client.disconnectedBufferSize = newDisconnectedBufferSize; }; 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._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> * @param {function} connectOptions.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> * @param {array} connectOptions.hosts - If present this contains either a set of hostnames or fully qualified * WebSocket URIs (ws://iot.eclipse.org:80/ws), 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. * @param {array} connectOptions.ports - If present the set of ports matching the hosts. If hosts contains URIs, this property * is not used. * @param {boolean} connectOptions.reconnect - Sets whether the client will automatically attempt to reconnect * to the server if the connection is lost. *<ul> *<li>If set to false, the client will not attempt to automatically reconnect to the server in the event that the * connection is lost.</li> *<li>If set to true, in the event that the connection is lost, the client will attempt to reconnect to the server. * It will initially wait 1 second before it attempts to reconnect, for every failed reconnect attempt, the delay * will double until it is at 2 minutes at which point the delay will stay at 2 minutes.</li> *</ul> * @param {number} connectOptions.mqttVersion - The version of MQTT to use to connect to the MQTT Broker. *<ul> *<li>3 - MQTT V3.1</li> *<li>4 - MQTT V3.1.1</li> *</ul> * @param {boolean} connectOptions.mqttVersionExplicit - If set to true, will force the connection to use the * selected MQTT Version or will fail to connect. * @param {array} connectOptions.uris - If present, should contain a list of fully qualified WebSocket uris * (e.g. ws://iot.eclipse.org:80/ws), that are tried in order in place of the host and port parameter of the construtor. * The uris are tried one at a time in order until one of them succeeds. Do not use this in conjunction with hosts as * the hosts array will be converted to uris and will overwrite this property. * @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", reconnect: "boolean", mqttVersion: "number", mqttVersionExplicit: "boolean", uris: "object" }); // 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 = null; 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); } }; /** * Publish a message to the consumers of the destination in the Message. * Synonym for Paho.Mqtt.Client#send * * @name Paho.MQTT.Client#publish * @function * @param {string|Paho.MQTT.Message} topic - <b>mandatory</b> The name of the topic to which the message is to be published. * - If it is the only parameter, used as Paho.MQTT.Message object. * @param {String|ArrayBuffer} payload - The message data to be published. * @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.publish = function(topic, payload, qos, retained) { console.log("Publising message to: ", topic); 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 onConnected() { return this._getOnConnected(); }, set onConnected(newOnConnected) { this._setOnConnected(newOnConnected); }, get disconnectedPublishing() { return this._getDisconnectedPublishing(); }, set disconnectedPublishing(newDisconnectedPublishing) { this._setDisconnectedPublishing(newDisconnectedPublishing); }, get disconnectedBufferSize() { return this._getDisconnectedBufferSize(); }, set disconnectedBufferSize(newDisconnectedBufferSize) { this._setDisconnectedBufferSize(newDisconnectedBufferSize); }, 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 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; 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 topic() { return this._getDestinationName(); }, set topic(newTopic) { this._setDestinationName(newTopic); }, 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 }; })(wx); return PahoMQTT; });
mqtt js库封装
let Paho = require('./paho-mqtt.js')
var mqtt = {}
//client对象
var client = null
//mqtt连接对象
const mqttUrl = {
hostname: 'io.topiot.co',
port: 8083,
path: '/mqtt/'
}
//订阅的主题与回掉方法
var map = new Map()
/**
* mqtt 连接状态
* 0:正在连接
* 1:连接成功建立
* 2:连接正在关闭
* 3:连接已经关闭
*/
let connectStatus = 0
//初始化weboscket
mqtt.initMqtt = () => {
if (null == client) {
//创建mqtt客户端
client = new Paho.Client('wss://io.topiot.co/mqtt/', '123123123')
} else {
//Do-nothing
}
client.onConnected = (reconnect, uri) => {
console.log('mqtt连接成功！client：', reconnect, uri)
//连接成功
connectStatus = 1
//注册全局的报警事件
}
client.onConnectionLost = (responseObject) => {
console.log('mqtt连接关闭！', responseObject)
if (responseObject.errorCode != 0) {
//异常关闭
mqtt.initMqtt()
} else {
//正常关闭连接
}
connectStatus = 3
}
client.onMessageArrived = (message) => {
//console.log("Message Recieved: [Topic: ", message.destinationName, ", Payload: ", message.payloadString, ", QoS: ", message.qos, ", Retained: ", message.retained, ", Duplicate: ", message.duplicate, "]");
let topic = message.destinationName
//console.log("map:",map);
try {
let json = JSON.parse(message.payloadString)
map.get(topic)(json)
} catch (err) {
console.error(err)
}
}
var options = {
invocationContext: {
host: mqttUrl.hostname,
port: mqttUrl.port,
path: mqttUrl.path,
clientId: '123123123'
},
//超时
timeout: 10,
//心跳
keepAliveInterval: 10,
//清除session，如果不清除，重连之后还能收到订阅的数据
cleanSession: true,
// useSSL:true,
reconnect: false,
onSuccess: onConnect,
onFailure: onFail
}
function onConnect (context) {
console.log('mqtt连接成功context：', context)
//连接成功
connectStatus = 1
}
function onFail (context) {
console.log('mqtt连接失败onFail：', context)
mqtt.initMqtt()
}
if (1 != connectStatus) {
console.log('开始连接')
client.connect(options)
//正在建立连接
connectStatus = 0
}
}
/**
* 订阅主题
* topic：主题名称
* qos：服务质量
*/
mqtt.subscribe = function (topic, qos, receiveCallback) {
if (1 == mqtt.getStatus()) {
client.subscribe(topic, {
qos: Number(qos)
})
map.set(topic, receiveCallback)
} else {
setTimeout(function () {
mqtt.subscribe(topic, qos, receiveCallback)
}, 1000)
}
}
/**
* 取消订阅主题
* topic：主题名称
*/
mqtt.unsubscribe = function (topic) {
if (1 == mqtt.getStatus()) {
client.unsubscribe(topic, {
onSuccess: unsubscribeSuccess,
onFailure: unsubscribeFailure,
invocationContext: {
topic: topic
}
})
map.delete(topic)
} else {
setTimeout(function () {
mqtt.unsubscribe(topic)
}, 1000)
}
}
function unsubscribeSuccess (context) {
console.log('取消订阅成功Topic：', context.invocationContext.topic)
}
function unsubscribeFailure (context) {
console.log('取消订阅成功Topic：', context.invocationContext.topic)
setTimeout(function () {
mqtt.unsubscribe(context.invocationContext.topic)
}, 1000)
}
/**
* 发送消息
* message：消息内容
* topic：主题
* qos：服务质量
*/
mqtt.publish = function (message, topic, qos) {
if (1 == mqtt.getStatus()) {
var message = new Paho.Message(message)
message.destinationName = topic
message.qos = Number(qos)
message.retained = false
client.send(message)
} else {
setTimeout(function () {
mqtt.publish(message, topic, qos)
}, 1000)
}
}
/**
* 返回mqtt的连接状态
*/
mqtt.getStatus = function () {
return connectStatus
}
/**
* 关闭连接
*/
mqtt.disconnect = function () {
console.log('关闭mqtt连接')
if (null != client) {
client.disconnect()
} else {
//Do-nothing
}
connectStatus = 3
client = null
}
mqtt.initMqtt()
export default mqtt
引用 在main.js中添加
import Vue from 'vue' import App from './App' import '@/styles/index.scss' // global css import fs from 'fs' import mqtt from './utils/mqtt' Vue.use(fs) Vue.prototype.$mqtt = mqtt Vue.config.productionTip = false App.mpType = 'app' const app = new Vue(App) app.$mount()
使用
export default { components: { NavBar }, data () { return { } }, methods: { receiveCallback (val) { console.log(val) console.log('我收到消息了') } }, mounted () { debugger this.$mqtt.subscribe('test', 0, this.receiveCallback) }, created () { } } </script>
参考：https://my.oschina.net/lwenhao/blog/3147722
至此大工告成！！！
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