go_getpages/main.go

package main

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

func getPage(url string) (int, error) {

	resp, err := http.Get(url)
	if err != nil {
		return 0, err
	}

	defer resp.Body.Close()
	body, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return 0, err
	}

	return len(body), nil
}

func main() {
	sites := map[string]string{
		"Google": "http://google.com",
		"Yahoo":  "http://yahoo.com",
		"Bing":   "http://bing.com",
	}

	for name, url := range sites {
		length, err := getPage(url)
		if err != nil {
			fmt.Printf("%s	%s\n", name, err)
		}
		fmt.Printf("%s	%d\n", name, length)
	}
}