前言:vue3+pinia项目
1.引入ws
javascript
yarn add ws
2.新建websocket.js类
javascript
let webSock = null;
let global_callback = null;
let isConnect = false; //连接标识 避免重复连接
let rec; //断线重连后,延迟5秒重新创建WebSocket连接 rec用来存储延迟请求的代码
let socketParams = {
pageKey: -1
};
let isActiveClose = false; // 是否主动关闭socket
let serverPort = "8080"; // webSocket连接端口
let wsUri = "ws://" + "xxx.xx.xx.xx" + ":" + serverPort;
// let serverPort = "8081"; // webSocket连接端口
// let wsUri = "ws://" + "192.168.50.156" + ":" + serverPort;
function createWebSocket(callback) {
if (webSock == null || Object.prototype.toString.call(webSock) !== "[object WebSocket]") {
initWebSocket(callback);
}
}
function initWebSocket(callback) {
log("init webSocket");
global_callback = callback;
// 初始化websocket
webSock = new WebSocket(`${wsUri}?Authorization=${填写登录令牌token}`);
webSock.onmessage = function(e) {
websocketOnMessage(e);
};
webSock.onclose = function(e) {
websocketClose(e);
};
webSock.onopen = function() {
websocketOpen();
};
// 连接发生错误的回调方法
webSock.onerror = function() {
websocketError();
};
}
//心跳设置
const heartCheck = {
timeout: 20000, //每段时间发送一次心跳包 这里设置为20s
timeoutObj: null, //延时发送消息对象(启动心跳新建这个对象,收到消息后重置对象)
start: function() {
this.timeoutObj = setInterval(function() {
if (isConnect) webSock.send(JSON.stringify(socketParams));
}, this.timeout);
},
reset: function() {
clearTimeout(this.timeoutObj);
this.start();
}
};
//定义重连函数
let reConnect = () => {
log("尝试重新连接");
if (isConnect) return; //如果已经连上就不在重连了
rec && clearTimeout(rec);
rec = setTimeout(function() { // 延迟5秒重连 避免过多次过频繁请求重连
if (!isConnect) {
initWebSocket();
}
}, 5000);
};
// 实际调用的方法
function sendSock(agentData) {
if (webSock.readyState === webSock.OPEN) {
// 若是ws开启状态
websocketSend(agentData);
} else if (webSock.readyState === webSock.CONNECTING) {
// 若是 正在开启状态,则等待1s后重新调用
setTimeout(function() {
sendSock(agentData);
}, 1000);
} else {
// 若未开启 ,则等待1s后重新调用
setTimeout(function() {
sendSock(agentData);
}, 1000);
}
}
function closeSock({ activeClose = false }) {
log(`关闭了 activeClose = ${activeClose}`);
isActiveClose = activeClose;
// 清除心跳定时器
heartCheck.timeoutObj && clearTimeout(heartCheck.timeoutObj);
// 清除重连定时器
rec && clearTimeout(rec);
if (isActiveClose) {
// 关闭socket
webSock.close();
}
// 初始化相关变量
webSock = null;
isConnect = false;
}
// 数据接收
function websocketOnMessage(msg) {
// global_callback(JSON.parse(msg.data));
if (!msg || !msg.data) {
// 可能得情况 - 心跳机制、无关信息接收
log("收到数据:空消息");
return;
}
log("收到数据:"+ msg.data);
// 收到信息为Blob类型时
let result = null;
if (msg.data instanceof Blob) {
const reader = new FileReader();
reader.readAsText(msg.data, "UTF-8");
reader.onload = (e) => {
result = JSON.parse(reader.result);
//console.log("websocket收到", result);
global_callback(result);
};
} else {
result = JSON.parse(msg.data);
//console.log("websocket收到", result);
global_callback(result);
}
}
// 数据发送
function websocketSend(agentData) {
log("发送数据:" + agentData);
webSock.send(agentData);
}
// 关闭
function websocketClose(e) {
log("connection closed (" + e.code + ")");
if (isActiveClose) {
isActiveClose = false;
return;
}
closeSock({ activeClose: false });
// 执行重连
reConnect();
}
const websocketError = () => {
log("WebSocket连接发生错误");
closeSock({ activeClose: true });
// 执行重连
reConnect();
}
function websocketOpen(e) {
log("连接打开");
isConnect = true;
heartCheck.start(); //发送心跳 看个人项目需求
}
export { sendSock, createWebSocket, closeSock };
3.新建一个pinia Store类
javascript
export const websocketStore = defineStore('websocket', () => {
/**
* socket推送过来的全量数据,暴露出去用户对数据变更的监听
*/
const serviceMsg = ref({});
/**
* 连接webSocket init
*/
const init = () => {
createWebSocket(global_callback);
};
/**
* websocket的回调函数
* @param jsonMsg 表示收到的消息
*/
const global_callback = (jsonMsg) => {
serviceMsg.value = jsonMsg;
... ...
};
/**
* webSocket发送消息
* @param sendData 发送的json数据
*/
const send = (sendData) => {
sendSock(JSON.stringify(sendData));
};
/**
* 关闭webSocket
*/
const close = ({ isActiveClose = false }) => {
closeSock({ activeClose: isActiveClose });
};
/**
* 关闭后重启socket
*/
const closeAndRestart = () => {
close({ isActiveClose: true });
init();
};
... ...
return {
init,
close,
closeAndRestart,
serviceMsg,
... ...
};
});
4.页面中使用
javascript
// 在页面挂载完成时启动websocket
onMounted(() => {
websocketStore().init();
});
// 使用watch函数监听消息变更
watch(
() => websocketStore().chatMsg,
(nValue, oValue) => {
// todo 界面信息更新
}
);