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

来源：https://blog.csdn.net/YMY_mine/article/details/87720736