UNIX DOMAIN SOCKETS IN GO unix域套接字

Unix domain sockets in Go - Golang News https://golangnews.org/2019/02/unix-domain-sockets-in-go/

package main

import (
   "fmt"
   "log"
   "net"
   "os"
   "time"
)

const SockAddr = "/tmp/echo.sock"

var reqCounter int64
var startTime time.Time

func init() {
   startTime = time.Now()

}
func echoServer(c net.Conn) {
   reqCounter += 1
   lastMilliseconds := time.Since(startTime)
   b1 := make([]byte, 128)
   n, err := c.Read(b1)
   fmt.Println("n, err", n, err, "b1", b1, "
rcv
", string(b1), "Client connected [%s]", c.RemoteAddr().Network())
   c.Close()
   ns := 10000000000.0
   lastSeconds := float64(lastMilliseconds) / ns
   fmt.Println("
reqCounter=", reqCounter, "QPS=", float64(reqCounter)/lastSeconds)
}

func main() {

   if err := os.RemoveAll(SockAddr); err != nil {
      log.Fatal(err)
   }

   l, err := net.Listen("unix", SockAddr)
   if err != nil {
      log.Fatal("listen error:", err)
   }
   defer l.Close()

   for {
      // Accept new connections, dispatching them to echoServer
      // in a goroutine.
      conn, err := l.Accept()
      if err != nil {
         log.Fatal("accept error:", err)
      }

      go echoServer(conn)
   }
}

package main

import (
   "fmt"
   "net"
   "time"
)

const SockAddr = "/tmp/echo.sock"

func main() {

   for {
      c, err := net.Dial("unix", SockAddr)
      if err != nil {
         fmt.Println("c,err", c, err)
         continue
      }

      clientStr := "abc世界-1--" + time.Now().String()
      b1 := []byte(clientStr)
      n, err := c.Write(b1)
      fmt.Println(time.Now(), n, err, "clientStr
", clientStr)

      e := c.Close()
      fmt.Println("e", e)

   }
}

　　

Go/src/net/unixsock.go:57

// ResolveUnixAddr returns an address of Unix domain socket end point.
//
// The network must be a Unix network name.
//
// See func Dial for a description of the network and address
// parameters.
func ResolveUnixAddr(network, address string) (*UnixAddr, error) {
   switch network {
   case "unix", "unixgram", "unixpacket":
      return &UnixAddr{Name: address, Net: network}, nil
   default:
      return nil, UnknownNetworkError(network)
   }
}