79 lines
2.0 KiB
JavaScript
79 lines
2.0 KiB
JavaScript
import mqtt from 'mqtt';
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// 全局变量
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let client= {
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instance : null,
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connected: false
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} ;
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/**
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* 初始化MQTT连接（无Promise，纯回调）
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* @param {Object} config 连接配置 {host, port, username, password, clientId, isSSL, keepalive, clean}
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* @param {Array} subs 订阅主题列表 [{topic: 'xxx', qos: 0}]
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*/
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export function initMQTT(config, subs = []) {
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// 1. 已有连接：直接回调成功
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if (client.instance && client.instance.connected) {
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return client;
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}
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const options = {
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clientId: 'uniapp_mqtt_' + Math.random().toString(16).substr(2, 8),
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username: config.username,
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password: config.password,
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clean: true,
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connectTimeout: 4000,
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reconnectPeriod: 1000
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}
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// 5. 构建连接参数
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const protocol = config.protocol || (config.isSSL ? 'wss' : 'ws');
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const url = `${protocol}://${config.host}:${config.port}/mqtt`
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client.instance = mqtt.connect(url, options)
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client.instance.on('connect', () => {
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client.connected = true
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client.instance.subscribe(subs, {qos: 0})
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console.info('已连接到MQTT服务器')
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console.info(client.instance)
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})
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client.instance.on('close', () => {
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console.info('连接已关闭')
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client.connected = false
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console.info(client.instance)
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})
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}
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/**
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* 断开MQTT连接（无Promise，纯回调）
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* @param {Function} onComplete 完成回调 () => {}
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*/
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export function disconnectMQTT() {
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if (client.instance && client.connected) {
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client.instance.end()
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client.connected = false
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console.info('已断开MQTT连接')
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}
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}
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/**
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* 获取MQTT客户端实例
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* @returns {Client} MQTT客户端
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*/
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export function getMQTTClientInstance() {
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return client.instance;
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}
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/**
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* 获取MQTT连接状态
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* @returns {Object} {isConnected: Boolean, isConnecting: Boolean}
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*/
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export function getMQTTStatus() {
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return {
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isConnected: !!client && client.connected,
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};
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}
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