golang tcp 回显服务器示例

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golang代码服务器：

package mainimport ( //"io" "log" "net" "time" "fmt" "runtime")func main() { runtime.GOMAXPROCS(4)//设置cpu个数 // Listen on TCP port 2000 on all interfaces. l, err := net.Listen("tcp", ":2000") if err != nil {  log.Fatal(err) } defer l.Close() for {  conn, err := l.Accept()  if err != nil {   log.Fatal(err)  }  // Handle the connection in a new goroutine.  // The loop then returns to accepting, so that  // multiple connections may be served concurrently.  go func(c net.Conn) {   defer c.Close()   var buf = make([]byte, 512)   for {    cnt, err := c.Read(buf)    if err != nil {     fmt.Printf("recv failed : %s", err)     return    }       //fmt.Println(string(buf[:cnt]))    time.Sleep(10)    _, err = c.Write(buf[:cnt])    if err != nil {     fmt.Printf("write failed : %s", err)     return    }   }  }(conn) }}

客户端python代码：

import threadingimport sysimport timeimport socket, sysimport selectdef echo():    host = "172.16.2.18"    textport = 2000    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)    try:        port = int(textport)    except ValueError:        port = socket.getservbyname(textport, 'tcp')    s.connect((host, port))    while 1:        select.select([],[],[],0.1)        data = time.ctime()        data.join("\r\n")        s.sendall(data)        #print "Looking for replies; press Ctrl-C or Ctrl-Break to stop."        buf = s.recv(2048)    if __name__ == "__main__":    threads = []    for i in xrange(3000):        os = threading.Thread(None,echo)        os.start()        threads.append(os)        for x in threads:        x.join()

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