Golang sample code to implement the web file sharing service

This article mainly introduces the Golang implementation web file sharing service sample code, to share with you, specific as follows:

Very simple, just two lines of code.

http.Handle("/", http.FileServer(http.Dir("./")))  // Treat the current file directory as a Shared directory 
http.ListenAndServe(":8080", nil)

At this point, open http://ip address :8080 in your browser.

Maybe that's it, but for the convenience of non-programmer users, I also need the program to automatically get the local Intranet ip address, which the browser opens automatically.

Gets the Intranet ip address

func GetIntranetIp() (r []string) {
  addrs, err := net.InterfaceAddrs()
  if err != nil {
    log.Fatal(err)
  }
  for _, address := range addrs {
    if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
      if ipnet.IP.To4() != nil {
        r = append(r, ipnet.IP.String())
      }
    }
  }
  return
}

The native browser opens this address automatically

loclstr := fmt.Sprintf("http://%s:8080", ip address )
cmd := exec.Command("cmd", "/C", "start "+loclstr)
cmd.Run()

The complete code

package main

import (
  "fmt"
  "log"
  "net"
  "net/http"
  "os/exec"
  "time"
)

func main() {
  address := GetIntranetIp()
  fmt.Println(" This machine ip Address List: ")
  for _, item := range address {
    fmt.Println(item)
  }
  http.Handle("/", http.FileServer(http.Dir("./")))
  fmt.Printf(" File sharing service open, monitor 8080 port \n Please open it in a browser :http://ip address :8080,eg:http://%s:8080\n Please do not close this program, have a good time \n", address[0])
  go func() {
    time.Sleep(2000)
    loclstr := fmt.Sprintf("http://%s:8080", address[0])
    cmd := exec.Command("cmd", "/C", "start "+loclstr)
    cmd.Run()
  }()
  if err := http.ListenAndServe(":8080", nil); err != nil {
    fmt.Println("err:", err)
  }
}

func GetIntranetIp() (r []string) {
  addrs, err := net.InterfaceAddrs()
  if err != nil {
    log.Fatal(err)
  }
  for _, address := range addrs {
    if ipnet, ok := address.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
      if ipnet.IP.To4() != nil {
        r = append(r, ipnet.IP.String())
      }
    }
  }
  return
}