A Server By Go

go_client.go

package main


import (
        "log"
        "net"
)


func main() {
        var conns []net.Conn
        for i := 0; i < 20000; i++ {
                c, err := net.Dial("tcp", "", "127.0.0.1:2020")
                if err != nil {
                        log.Fatalf("dial error: %v", err)
                }
                conns = append(conns, c)
        }
        select {}
}

go_server.go

package main


import (
        "bufio"
        "log"
        "net"
)


func main() {
        ln, err := net.Listen("tcp", ":2020")
        if err != nil {
                log.Fatalf("listen error: %v", err)
        }
        accepted := 0
        for {   
                conn, err := ln.Accept()
                if err != nil {
                        log.Fatalf("accept error: %v", err)
                }
                accepted++
                go serve(conn)
                log.Printf("Accepted %d", accepted)
        }
}


func serve(conn net.Conn) {
        bufr := bufio.NewReader(conn)
        for {   
                line, err := bufr.ReadString('\n')
                if err != nil {
                        return
                }
                conn.Write([]byte(line))
        }
}