2.3.1 身份验证差异
Socket.io 现使用中间器件
const srv=require('http').createServer();
const io = require('socket.io')(srv)
let run=0;
io.use((socket,next)=>{
run++; //0->1
next()
});
io.use((socket,next)=>{
run++;// 1->2
next();
})
const socket=require('socket.io-client')();
socket.io('connect',()=>{
// run 此时等于2
})现通过中间件进行身份验证更简单
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