Go语言使用http下载文件

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)  
}  </pre>