package main

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

func main() {
	var url string

	flag.StringVar(&url, "url", "", "what URL to retrieve?")
	flag.Parse()

	if url == "" {
		fmt.Fprintf(os.Stderr, "MUST give URL\n")
		os.Exit(1)
	}

	resp, err := http.Get(url)
	if err != nil {
		fmt.Fprintf(os.Stderr, "fetch: %v\n", err)
		os.Exit(1)
	}

	b, err := ioutil.ReadAll(resp.Body)
	resp.Body.Close()
	if err != nil {
		fmt.Fprintf(os.Stderr, "fetch: reading %s: %v\n", url, err)
		os.Exit(1)
	}

	fmt.Printf("%s", b)
}