Private Chat Service for Golang

This is a creation in Article, where the information may have evolved or changed.

A simple Golang implementation of private chat, determined by server-side 22 matches
Server-Side Chat_server.go

Package Mainimport ("FMT" "io" "Log" "NET") const LISTENADDR = "localhost:4000" Func Main () {L, err: = Net. Listen ("TCP", LISTENADDR) if err! = Nil {log. Fatal (Err)} for {c, err: = L.accept () if err! = Nil {log. Fatal (ERR)}//go io. Copy (c, c) go Match (c)}}var partner = make (chan io. Readwritecloser) func match (c io. Readwritecloser) {fmt.    Fprint (c, "Waiting for a partner ...") Select {case partner <-C://Now handled by the other Goroutine Case P: = <-partner:chat (P, c)}}/*func chat (A, b io. Readwritecloser) {fmt. Fprintln (A, "Found one!    Say hi. ") Fmt. Fprintln (b, "Found one!    Say hi. ") Go IO. Copy (A, b) Io. Copy (b, a)}*/func chat (A, b io. Readwritecloser) {fmt. Fprintln (A, "Found one!    Say hi. ") Fmt. Fprintln (b, "Found one!    Say hi. ") ERRC: = Make (chan error, 1) go CP (A, B, ERRC) go CP (b, A, ERRC) if err: = <-errc; Err! = Nil {log. PRINTLN (ERR)} A.cloSE () b.close ()}func CP (W IO). Writer, R io. Reader, ERRC chan<-error) {_, Err: = Io. Copy (W, R) ERRC <-Err}

Client Chat_client.go:

package mainimport (    "fmt"    "log"    "net")func main() {    l, err := net.Dial("tcp", "localhost:4000")    if err != nil {        log.Fatal(err)    }    go send(l)    for {        datas := make([]byte, 255)        n, err := l.Read(datas)        if err != nil {            log.Fatal(err)        }    fmt.Println(string(datas[0:n]))    }   }func send(l net.Conn){    sms := make([]byte, 255)    for{        //fmt.Print("请输入要发送的消息：")        _, err := fmt.Scan(&sms)        if err != nil {            fmt.Println("数据输入异常:", err.Error())        }        l.Write(sms)    }}