148 lines
4.5 KiB
JavaScript
148 lines
4.5 KiB
JavaScript
class webSocketUtils {
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constructor(url, time, params) {
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this.socketTask = null;
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this.is_open_socket = false; //避免重复连接
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this.url = url;
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this.params = params ? params : null;////是否初始化请求
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this.connectNum = 1; // 重连次数
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//这个参数是防止重连失败之后onClose方法会重复执行reconnect方法，导致重连定时器出问题
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//连接并打开之后可重连，且只执行重连方法一次
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this.canReconnect = false; // 是否可以重连
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//心跳检测
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this.timeout = time ? time : 5000; //多少秒执行检测
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this.heartbeatInterval = null; //检测服务器端是否还活着
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this.reconnectTimeOut = null; //重连之后多久再次重连
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try {
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return this.connectSocketInit({
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data: this.params,
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type: 'connectSocketInit',
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});
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} catch (e) {
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console.log('catch');
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this.reconnect();
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}
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}
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// 进入这个页面的时候创建websocket连接【整个页面随时使用】
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connectSocketInit (data) {
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console.log(data,"初始化")
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this.data = data;
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console.log('this.url==', this.url);
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this.socketTask = uni.connectSocket({
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url: this.url,
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success: () => {
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console.log('正准备建立websocket中...');
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// uni.hideLoading();
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// 返回实例
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return this.socketTask;
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},
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});
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console.log('this.params==', this.params);
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this.socketTask.onOpen((res) => {
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this.connectNum = 1;
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console.log('WebSocket连接正常！');
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if(this.params){//是否初始化请求
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this.send(this.params);
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}
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clearInterval(this.reconnectTimeOut);
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clearInterval(this.heartbeatInterval);
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this.is_open_socket = true;
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this.canReconnect = true;
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this.start();
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// 注：只有连接正常打开中 ，才能正常收到消息
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this.socketTask.onMessage((e) => {
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// 字符串转json
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let res = JSON.parse(e.data);
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uni.$emit('message', res)
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// 普通socket信息处理 TODO
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});
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});
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// 监听连接失败，这里代码我注释掉的原因是因为如果服务器关闭后，和下面的onclose方法一起发起重连操作，这样会导致重复连接
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uni.onSocketError((res) => {
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console.log('网络断开，请检查！');
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this.socketTask = null;
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this.is_open_socket = false;
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this.canReconnect = true;
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clearInterval(this.heartbeatInterval);
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clearInterval(this.reconnectTimeOut);
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if (this.connectNum <= 10) {
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uni.showToast({
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title: `网络连接失败，正尝试第${this.connectNum}次连接`,
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icon: 'none',
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});
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this.reconnect();
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this.connectNum += 1;
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} else {
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// uni.$emit('connectError');
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uni.showToast({
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title: `网络连接失败，请检查网络！`,
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icon: 'none',
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});
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this.connectNum = 1;
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this.canReconnect = false;
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}
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});
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// 这里仅是事件监听【如果socket关闭了会执行】
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this.socketTask.onClose(() => {
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this.socketTask = null;
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clearInterval(this.heartbeatInterval);
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clearInterval(this.reconnectTimeOut);
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this.is_open_socket = false;
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if (this.canReconnect) {
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this.reconnect();
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this.canReconnect = false;
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}
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});
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}
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// 主动关闭socket连接
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Close () {
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this.is_open_socket = true;
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this.canReconnect = false;
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if(this.socketTask){
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this.socketTask.close({
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success(res) {
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console.log('手动关闭成功');
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},
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});
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}
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}
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//发送消息
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send(data) {
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console.log("发送消息---------->", data);
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// 注：只有连接正常打开中 ，才能正常成功发送消息
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if (this.socketTask) {
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this.socketTask.send({
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data: JSON.stringify(data),
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async success() {
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console.log("消息发送成功");
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},
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});
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}
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}
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//开启心跳检测
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start(data) {
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console.log('开启心跳检测',data)
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this.heartbeatInterval = setInterval(() => {
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// this.send({
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// data: '心跳检测',
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// type: 'jc',
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// });
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}, this.timeout);
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}
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//重新连接
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reconnect() {
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//停止发送心跳
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clearInterval(this.heartbeatInterval);
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//如果不是人为关闭的话，进行重连
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if (!this.is_open_socket) {
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console.log('进行重连');
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// this.canReconnect = true;
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this.reconnectTimeOut = setInterval(() => {
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this.connectSocketInit(this.data);
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}, this.timeout);
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}
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}
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}
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module.exports = webSocketUtils; |