<pre style="margin-top: 0px; margin-bottom: 0px;"><span style=" color:#0000ff;">package</span><span style=" color:#f57900;"> </span>main
import (
"fmt"
"net"
"time"
)
func main() {
udpaddr, err := net.ResolveUDPAddr("udp", "127.0.0.1:1789")
if err != nil {
fmt.Println(err)
return
}
lis, err := net.ListenUDP("udp", udpaddr)
if err != nil {
fmt.Println(err)
return
}
defer lis.Close()
for {
buf := make([]byte, 512)
n, addr, err := lis.ReadFromUDP(buf)
if err != nil {
fmt.Println(err)
continue
}
str := string(buf[:n])
go func(lis *net.UDPConn, addr *net.UDPAddr, body string) {
lis.WriteToUDP([]byte(body), addr)
time.Sleep(3e9)
}(lis, addr, str)
}
}
package main
import (
"bytes"
"encoding/json"
"fmt"
"io"
"net"
"os"
)
type Fileinfo struct {
Name string
Path string
}
func server() {
laddr := &net.UDPAddr{IP: []byte{127, 0, 0, 1}, Port: 1789}
con, err := net.ListenUDP("udp", laddr)
if err != nil {
fmt.Println(err)
return
}
defer con.Close()
for {
Buf := make([]byte, 1024)
n, raddr, _ := con.ReadFromUDP(Buf)
var info Fileinfo
json.Unmarshal(Buf[:n], &info)
if info.Name != "" {
if info.Path != "" {
e := os.Chdir(info.Path)
if e != nil {
con.WriteTo([]byte(e.Error()), raddr)
continue
}
}
con.WriteToUDP([]byte("OK"), raddr)
File, _ := os.Create(info.Name)
defer File.Close()
for {
Buf := make([]byte, 4096)
n, r, _ := con.ReadFromUDP(Buf)
if r.String() != raddr.String() {
continue
}
if n == 4 && bytes.Contains([]byte{0, 69, 79, 70}, Buf[:n]) {
File.Sync()
File.Close()
break
}
File.Write(Buf[:n])
}
}
}
}
func client() {
con, e := net.Dial("udp", "127.0.0.1:1789")
if e != nil {
fmt.Println(e)
return
}
defer con.Close()
var info Fileinfo = Fileinfo{Name: "WinMD5.exe", Path: "D:"}
b, _ := json.Marshal(info)
con.Write([]byte(b))
Buf := make([]byte, 1024)
n, _ := con.Read(Buf)
if string(Buf[:n]) == "OK" {
File, _ := os.Open("3.go")
for {
Buf := make([]byte, 4096)
n, e := File.Read(Buf)
if e != nil {
if e == io.EOF {
break
}
fmt.Println(e)
break
}
con.Write(Buf[:n])
}
con.Write([]byte{0, 69, 79, 70})
}
}