安装 socket.io
npm install -save socket.io
封装 socket,io 客户端
/**
webSocket客户端工厂，目的在于使用facade模式封装关于webSocket的操作
不涉及任何业务处理。
实现方案：定义WebSocket类，该类具备发送消息和监听消息能力
*/
export default class WebSocketClient {
constructor(uri ='/', {
path ='/',
forceNew =true,
transports = ['polling','websocket'],
autoConnect =false,
} = {}
){
this.client = io(uri,{path, forceNew,transports,autoConnect});
}
connect(){
this.client.open();
}
disconnect(){
this.client.close();
}
receive(eventName,callback){
this.client.on(eventName,(data) => callback(transJson(data)));
}
send(eventName,data){
this.client.emit(eventName,data);
}
}
/**
* 将后台传过来的json字符串转换为object
* @param data
* @param callback
*/
function transJson(data){
let trans = data;
if(typeof data ==='string' && (data.indexOf('{') ===0 || data.indexOf('[') ===0)){
trans =JSON.parse(data);
}
return trans;
}```
引入WebSocketClient
import WebSocketClient from "../../utils/WebSocketClient";
利用react钩子函数实现实时刷新
componentDidMount() { this.connectWebSocket()}
componentWillReceiveProps(){ this.initWebSocket() }
componentWillUnmount() { this.closeWebSocket() }
connectWebSocket=()=>{
if(!window.webSocketClient)
{ window.webSocketClient = new WebSocketClient('ws://${‘服务器地址’}',{path:'/path'}); }
const {webSocketClient} = window; webSocketClient.connect();
webSocketClient.send('event','123');
]
initWebSocket=()=>{
if(!window.webSocketClient)
{ window.webSocketClient = new WebSocketClient('ws://${‘服务器地址’}',{path:'/path'}); }
const {webSocketClient} = window; webSocketClient.receive('
Message',(data) =>{ this.setState({ socketData:data, }) });
}
closeWebSocket =()>{
const {webSocketClient} = window;
if(webSocketClient){ webSocketClient.disconnect();}
}
