封装一个vue3用的websocket,要求有心跳机制,代码给我生成
时间: 2024-02-25 08:56:28 浏览: 68
好的,以下是一个封装了心跳机制的Vue3用WebSocket的代码示例:
```javascript
import { reactive } from 'vue';
const defaultOptions = {
url: '',
protocols: '',
heartbeatInterval: 5000, // 心跳间隔,单位ms
reconnectInterval: 3000, // 重连间隔,单位ms
onopen: null,
onmessage: null,
onclose: null,
onerror: null,
};
export default function useWebSocket(options = {}) {
const state = reactive({
ws: null,
isConnected: false,
isReconnecting: false,
reconnectTimer: null,
...defaultOptions,
...options,
});
function connect() {
state.ws = new WebSocket(state.url, state.protocols);
state.ws.onopen = (evt) => {
state.isConnected = true;
state.isReconnecting = false;
if (state.onopen) {
state.onopen(evt);
}
startHeartbeat();
};
state.ws.onmessage = (evt) => {
if (state.onmessage) {
state.onmessage(evt);
}
};
state.ws.onclose = (evt) => {
stopHeartbeat();
if (state.onclose) {
state.onclose(evt);
}
if (!state.isReconnecting) {
state.isReconnecting = true;
state.reconnectTimer = setTimeout(() => {
connect();
}, state.reconnectInterval);
}
};
state.ws.onerror = (evt) => {
if (state.onerror) {
state.onerror(evt);
}
};
}
function disconnect() {
state.ws.close();
stopHeartbeat();
state.isConnected = false;
state.isReconnecting = false;
clearTimeout(state.reconnectTimer);
}
function send(data) {
state.ws.send(data);
}
let heartbeatTimer = null;
function startHeartbeat() {
heartbeatTimer = setInterval(() => {
if (state.isConnected) {
state.ws.send('ping');
} else {
stopHeartbeat();
}
}, state.heartbeatInterval);
}
function stopHeartbeat() {
clearInterval(heartbeatTimer);
}
connect();
return {
state,
send,
disconnect,
};
}
```
这个代码示例使用了Vue3的响应式数据,通过`reactive`函数创建了一个响应式的`state`对象,其中包括WebSocket的实例`ws`、是否已连接的状态`isConnected`、是否正在尝试重连的状态`isReconnecting`、重连定时器`reconnectTimer`等属性,以及默认的一些配置项`defaultOptions`和传入的配置项`options`。
在`connect`函数中创建WebSocket实例,并设置其`onopen`、`onmessage`、`onclose`、`onerror`等事件的回调函数。其中,在连接成功后会调用`startHeartbeat`函数开始心跳检测,每隔一定时间向服务器发送`ping`消息。在连接关闭后会调用`stopHeartbeat`函数停止心跳检测,并在`isReconnecting`为`false`时设置其为`true`,开始尝试重连并设置定时器。
`send`函数用于向服务器发送消息,`disconnect`函数用于手动断开WebSocket连接。
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