一文教你如何优雅的使用WebSocket

// 创建websocket服务
const port = "8888"
const ws = require('nodejs-websocket');
const web_server = ws.createServer(function (conn) {
  conn.on('text', function (text) {
    console.log("发送的消息",text);
    conn.sendText(`发送成功了,发送的消息为：${text}`)
  });
  conn.on('close', function (code, reason) {
    console.log('关闭连接');
  });
  conn.on('error', function (code, reason) {
    console.log('异常关闭');
  });
}).listen(port);
exports.web_server = web_server

const websocket = require("./websocket")

node app

let webSocket = null;
let socketOpen = false;

// 发送消息
export const doSend = (message) => {
  if (socketOpen) {
    webSocket.send(message)
  }
}

// 初始化websocket
export const contactSocket = () => {
  if ("WebSocket" in window) {
    webSocket = new WebSocket("ws://192.168.1.100:8888/");
    webSocket.onopen = function () {
      console.log("连接成功！");
      socketOpen = true
    };
    webSocket.onmessage = function (evt) {
      var received_msg = evt.data;
      console.log("接受消息：" + received_msg);
    };
    webSocket.onclose = function () {
      console.log("连接关闭！");
    };
  }
}

import { contactSocket, doSend }  from '@/utils/contactSocket'

// 初始化websocket
contactSocket()
// 发送消息内容
setTimeout(() => {
  doSend("向服务端发送的消息")
}, 1000)

let socketOpen = false;
// 发送消息
function doSend(message) {
    if (socketOpen) {
        uni.sendSocketMessage({
            data: message
        });
    } 
}

// 初始化websocket
function contactSocket() {
    // 建立连接
    uni.connectSocket({
        url: 'ws://192.168.1.100:8888/'
    });
    // 连接错误
    uni.onSocketError(function(res) {
        console.log('WebSocket连接打开失败，请检查！');
    });
    // 打开了连接
    uni.onSocketOpen(function() {
        console.log('WebSocket连接已打开！');
        socketOpen = true;
    });
    // 关闭连接
    uni.onSocketClose(function(res) {
        console.log('WebSocket 已关闭！');
    });
    // 接受消息
    uni.onSocketMessage(function(res) {
        console.log('收到服务器内容：' + res.data);
    });
}

module.exports = {
    doSend,
    websocketInit
}

import { doSend, contactSocket } from '@/utils/websocket.js'

// 初始化websocket
contactSocket()
// 发送消息内容
setTimeout(()=>{
    doSend("向服务端发送的消息");
},1000)