golang 使用unixsocket交换数据 socket

// author [e-mail] 20170623// golang 使用unixsocket交换数据// 单元测试示例：// package utils// import (//  "fmt"//  u "lpaiche.com/utils"//  // "os"//  "testing"//  "time"// )// func TestServer(t *testing.T) {//  //声明unixsocket//  us := u.NewUnixSocket("/tmp/us.socket")//  //设置服务端接收处理//  us.SetContextHandler(func(context string) string {//      fmt.Println(context)//      now := time.Now().String() + "sssssss"//      return now//  })//  //开始服务//  go us.StartServer()//  time.Sleep(time.Second * 30)// }// func TestClient(t *testing.T) {//  //声明unixsocket//  us := u.NewUnixSocket("/tmp/us.socket")//  //发送数据unixsocket并返回服务端处理结果//  r := us.ClientSendContext("eeeeeee")//  fmt.Println("===============" + r)// }package utilsimport (    "fmt"    "net"    "os"    "time")type UnixSocket struct {    filename string    bufsize  int    handler  func(string) string}func NewUnixSocket(filename string, size ...int) *UnixSocket {    size1 := 10480    if size != nil {        size1 = size[0]    }    us := UnixSocket{filename: filename, bufsize: size1}    return &us}func (this *UnixSocket) createServer() {    os.Remove(this.filename)    addr, err := net.ResolveUnixAddr("unix", this.filename)    if err != nil {        panic("Cannot resolve unix addr: " + err.Error())    }    listener, err := net.ListenUnix("unix", addr)    defer listener.Close()    if err != nil {        panic("Cannot listen to unix domain socket: " + err.Error())    }    fmt.Println("Listening on", listener.Addr())    for {        c, err := listener.Accept()        if err != nil {            panic("Accept: " + err.Error())        }        go this.HandleServerConn(c)    }}//接收连接并处理func (this *UnixSocket) HandleServerConn(c net.Conn) {    defer c.Close()    buf := make([]byte, this.bufsize)    nr, err := c.Read(buf)    if err != nil {        panic("Read: " + err.Error())    }    // 这里，你需要 parse buf 里的数据来决定返回什么给客户端    // 假设 respnoseData 是你想返回的文件内容    result := this.HandleServerContext(string(buf[0:nr]))    _, err = c.Write([]byte(result))    if err != nil {        panic("Writes failed.")    }}func (this *UnixSocket) SetContextHandler(f func(string) string) {    this.handler = f}//接收内容并返回结果func (this *UnixSocket) HandleServerContext(context string) string {    if this.handler != nil {        return this.handler(context)    }    now := time.Now().String()    return now}func (this *UnixSocket) StartServer() {    this.createServer()}//客户端func (this *UnixSocket) ClientSendContext(context string) string {    addr, err := net.ResolveUnixAddr("unix", this.filename)    if err != nil {        panic("Cannot resolve unix addr: " + err.Error())    }    //拔号    c, err := net.DialUnix("unix", nil, addr)    if err != nil {        panic("DialUnix failed.")    }    //写出    _, err = c.Write([]byte(context))    if err != nil {        panic("Writes failed.")    }    //读结果    buf := make([]byte, this.bufsize)    nr, err := c.Read(buf)    if err != nil {        panic("Read: " + err.Error())    }    return string(buf[0:nr])}