golang tcp server client

实例代码如下：

server

import (
        "fmt"
        "net"
        "log"
)

func main() {

        addr := "0.0.0.0:8080"

        tcpAddr, err := net.ResolveTCPAddr("tcp",addr)

        if err != nil {
                log.Fatalf("net.ResovleTCPAddr fail:%s", addr)
        }

        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 handleConnection(conn)

        }

}


func handleConnection(conn net.Conn) {

        defer conn.Close()

        var buffer []byte = []byte("You are welcome. I'm server.")

        n, err := conn.Write(buffer)

        if err != nil {

                fmt.Println("Write error:", err)
        }
        fmt.Println("send:", n)

        fmt.Println("connetion end")

}

client

package main


import (
        "fmt"
        "net"
        "os"
)

func main() {

        conn, err := net.Dial("tcp", "127.0.0.1:8080")
        if err != nil {
                fmt.Println("dial failed:", err)
                os.Exit(1)
        }
        defer conn.Close()


        buffer := make([]byte, 512)

        n, err2 := conn.Read(buffer)
        if err2 != nil {
                fmt.Println("Read failed:", err2)
                return
        }

        fmt.Println("count:", n, "msg:", string(buffer))


}

Read函数最多读取len(buffer)个字节到buffer中。

##测试

server output:

2017/10/05 00:12:18 rpc listening 0.0.0.0:8080
send: 28
connetion end

client output:

count: 28 msg: You are welcome. I’m server.

最后

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