golang download file

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package main 

import (
          
"fmt"
          
"io"
          
"net/http"
          
"os"
      
) 

var (
          
url = "http://127.0.0.1:1789/src/qq.exe"
      
) 

func main() {
          
res, err := http.Get(url)
          
if err != nil {
              
panic(err)
          
}
          
f, err := os.Create("qq.exe")
          
if err != nil {
              
panic(err)
          
}
          
io.Copy(f, res.Body)
      
}