83 lines
2.1 KiB
JavaScript
83 lines
2.1 KiB
JavaScript
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const mqtt = require('mqtt');
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let client;
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export default {
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/**
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* 连接订阅
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* @param {String} host 服务器地址
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* @param {Integer} port 服务器端口
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* @param {Object} conOptions 连接选项
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* @param {StringOrArray} topic 订阅主题，数组
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* @param {Object} subOptions 订阅选项
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* @param {Function} callback 订阅回调
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*/
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connect: function(host, port, conOptions, topic, subOptions, callback) {
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// 匹配对应protocol
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let protocol = 'mqtt';
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// #ifdef H5 || APP || APP-VUE
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protocol = 'ws';
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// #endif
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// #ifdef MP-WEIXIN || APP-PLUS
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protocol = 'wxs';
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// #endif
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// #ifdef MP-ALIPAY
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protocol = 'alis';
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// #endif
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// 拼接Uri
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const uri = protocol + "://" + host + ":" + port + "/mqtt";
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// 客户端连接
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client = mqtt.connect(uri, Object.assign({}, conOptions));
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if (client) {
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client.on('connect', function() {
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if (client.connected) {
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console.log(client.options.clientId, uri, 'connect ok');
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client.subscribe(topic, Object.assign({}, subOptions), function(err, granted) {
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if (!err) {
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console.log('subscribe ok:', JSON.stringify(granted));
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client.on('message', function(topic, message, packet) {
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if (callback && typeof callback === "function") {
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callback(topic, message);
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}
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});
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} else {
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console.error('subscribe error:', err);
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}
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});
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} else {
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console.error(client.options.clientId, uri, 'connect fail', client);
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}
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});
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} else {
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console.error(client.options.clientId, uri, 'connect error');
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}
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},
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/**
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* 发布消息
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* @param {String} topic 发布主题，字符串
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* @param {Object} options 发布选项
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* @param {BufferOrString} message 消息
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* @param {Function} callback 发布回调
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*/
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publish: function(topic, options, message, callback) {
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if (!client) {
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console.error('client not connected');
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return;
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}
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client.publish(topic, message, Object.assign({}, options), function(err) {
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if (err) {
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console.error(err);
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} else {
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if (callback && typeof callback === 'function') {
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callback(topic);
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}
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}
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});
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}
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}
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