【go】go语言socket通信样例

原作者: [db:作者] 来自: [db:来源] 收藏邀请

server.go

package main
 
import (
    "net"
    "fmt"
    "io"
)
 
const RECV_BUF_LEN = 1024
 
func main() {
    listener, err := net.Listen("tcp", "0.0.0.0:6666")//侦听在6666端口
    if err != nil {
        panic("error listening:"+err.Error())
    }
    fmt.Println("Starting the server")
 
    for {
        conn, err := listener.Accept() //接受连接
        if err != nil {
            panic("Error accept:"+err.Error())
        }
        fmt.Println("Accepted the Connection :", conn.RemoteAddr())
        go EchoServer(conn)
    }
}
 
func EchoServer(conn net.Conn) {
    buf := make([]byte, RECV_BUF_LEN)
    defer conn.Close()
 
    for {
        n, err := conn.Read(buf);
        switch err {
            case nil:
                conn.Write( buf[0:n] )
            case io.EOF:
                fmt.Printf("Warning: End of data: %s \n", err);
                return
            default:
                fmt.Printf("Error: Reading data : %s \n", err);
                return
        }
     }
}

client.go

package main
 
import (
    "fmt"
    "time"
    "net"
)
 
const RECV_BUF_LEN = 1024
 
func main() {
    conn,err := net.Dial("tcp", "127.0.0.1:6666")
    if err != nil {
        panic(err.Error())
    }
    defer conn.Close()
 
    buf := make([]byte, RECV_BUF_LEN)
 
    for i := 0; i < 5; i++ {
        //准备要发送的字符串
        msg := fmt.Sprintf("Hello World, %03d", i)
        n, err := conn.Write([]byte(msg))
        if err != nil {
            println("Write Buffer Error:", err.Error())
            break
        }
        fmt.Println(msg)
 
        //从服务器端收字符串
        n, err = conn.Read(buf)
        if err !=nil {
            println("Read Buffer Error:", err.Error())
            break
        }
        fmt.Println(string(buf[0:n]))
 
        //等一秒钟
        time.Sleep(time.Second)
    }
}