golang 实现tcp server端和client端,并计算RTT时间操作

server端代码：

package main
import (
 "fmt"
 "net"
 "log"
 "os"
)

func main() {
 addr := "0.0.0.0:8787"
 tcpAddr, err := net.ResolveTCPAddr("tcp",addr)
 if err != nil {
 log.Fatalf("net.ResovleTCPAddr fail:%s", addr) //等价于print err后，再os.Exit(1)
 }

 listener, err := net.ListenTCP("tcp", tcpAddr)
 if err != nil {
 log.Fatalf("listen %s fail: %s", addr, err)
 }else {

 log.Println("rpc listening", addr)
 }

 for {
 conn, err := listener.Accept()
 if err != nil {
 log.Println("listener.Accept error:", err)
 continue
 }

 go handle_Client(conn)
 }
} 

func handle_Client(conn net.Conn) {
 defer conn.Close()

 var write_buffer []byte = []byte("ok")
 read_buffer := make([]byte, 128)

 n, err1 := conn.Read(read_buffer)
 if err1 != nil {
 fmt.Println("ser Read failed:", err1)
 os.Exit(1)
 }

 m, err2 := conn.Write(write_buffer)
 if err2 != nil {
 fmt.Println("ser send error:", err2)
 os.Exit(1)
 }

 fmt.Println("ser read cli send data count:", n, "msg:", string(read_buffer))
 fmt.Println("ser send data to cli count:", m, "msg:", string(write_buffer))
 fmt.Println("********one connetion end*********")
}

client端代码：

package main
import (
 "fmt"
 "net"
 "os"
 "time"
)

func main() {
 conn, err := net.Dial("tcp", "127.0.0.1:8787")
 if err != nil {
 fmt.Println("dial failed:", err)
 os.Exit(1)
 }
 defer conn.Close() 

 var write_buffer []byte = []byte("Hi,server. I'm client.")
 read_buffer := make([]byte, 128)

 start_time := time.Now()
 n, err2 := conn.Write(write_buffer)
 if err2 != nil {
 fmt.Println("cli send error:", err2)
 os.Exit(1)
 }

 m, err1 := conn.Read(read_buffer)
 if err1 != nil {
 fmt.Println("cli Read failed:", err1)
 os.Exit(1)
 }
 response_time := time.Since(start_time)
 RTT_time := float64(response_time.Nanoseconds()) / 1e+06 //ns-->ms
 fmt.Println(RTT_time)
 fmt.Println("cli send data to ser count:", n, "msg:", string(write_buffer))
 fmt.Println("cli read ser data count:", m, "msg:", string(read_buffer))
}

补充：go 语言 TCP服务器接受客户端字符串信息

我就废话不多说了，大家还是直接看代码吧~

func hand_conn(conn net.Conn) ([]byte){
  defer conn.Close()
  //clientarr := conn.RemoteAddr() //获取连接到的对像的IP地址
  result := bytes.NewBuffer(nil)
  var buf [512]byte
  for {
    n, err := conn.Read(buf[0:])
    result.Write(buf[0:n])
    if err != nil {
      if err == io.EOF {
       break
      }
    }
  }
  //explan_rec_infos(string(result.Bytes()))
  return result.Bytes()
}
func main() {
 fmt.Println("Hello World! go server")
  server, err := net.Listen("tcp", ":9993")
  if err == nil { //若果err为nil，则成功创建
    index := 1
    for {
      index++
      con, _ := server.Accept()
      fmt.Println("有一个客户连接" , index)
      hand_conn(con)
    }
  } else {
    return
  }
}

以上为个人经验，希望能给大家一个参考，也希望大家多多支持我们。如有错误或未考虑完全的地方，望不吝赐教。