// Sample program to show how to write a simple version of curl using

// the io.Reader and io.Writer interface support.

package main

import (

    "fmt"

    "io"

    "net/http"

    "os"

)

// init is called before main.

func init() {

    if len(os.Args) !=  {

        fmt.Println("Usage: ./example2 <url>")

        os.Exit(-)

    }

}

// main is the entry point for the application.

func main() {

    // Get a response from the web server.

    r, err := http.Get(os.Args[])

    if err != nil {

        fmt.Println(err)

        return

    }

    // Copies from the Body to Stdout.

    io.Copy(os.Stdout, r.Body)

    if err := r.Body.Close(); err != nil {

        fmt.Println(err)

    }

}

go run test.go http://www.baidu.com