/* server.go */ package main
import ( "bufio" "fmt" "net" "time" )
func main() { var tcpAddr *net.TCPAddr
tcpAddr, _ = net.ResolveTCPAddr("tcp", "127.0.0.1:9999")
tcpListener, _ := net.ListenTCP("tcp", tcpAddr)
defer tcpListener.Close()
for {
tcpConn, err := tcpListener.AcceptTCP()
if err != nil {
continue
}
fmt.Println("A client connected : " + tcpConn.RemoteAddr().String())
go tcpPipe(tcpConn)
}
}
func tcpPipe(conn *net.TCPConn) { ipStr := conn.RemoteAddr().String() defer func() { fmt.Println("disconnected :" + ipStr) conn.Close() }() reader := bufio.NewReader(conn)
for {
message, err := reader.ReadString('\n')
if err != nil {
return
}
fmt.Println(string(message))
msg := time.Now().String() + "\n"
b := []byte(msg)
conn.Write(b)
}
}
/*client.go */ package main
import ( "bufio" "fmt" "net" "time" )
var quitSemaphore chan bool
func main() { var tcpAddr *net.TCPAddr tcpAddr, _ = net.ResolveTCPAddr("tcp", "127.0.0.1:9999")
conn, _ := net.DialTCP("tcp", nil, tcpAddr)
defer conn.Close()
fmt.Println("connected!")
go onMessageRecived(conn)
b := []byte("time\n")
conn.Write(b)
<-quitSemaphore
}
func onMessageRecived(conn *net.TCPConn) { reader := bufio.NewReader(conn) for { msg, err := reader.ReadString('\n') fmt.Println(msg) if err != nil { quitSemaphore <- true break } time.Sleep(time.Second) b := []byte(msg) conn.Write(b) } }
