one request one goroutine

one_req_one_goroutine.go

package main

import (
	"fmt"
	"net/http"
)

type Response struct {
	url    string
	result string
}

func worker(url string, respCh chan<- Response) {
	resp, err := http.Head(url)
	if err != nil {
		respCh <- Response{url, err.Error()}
	} else {
		respCh <- Response{url, resp.Status}
	}
}

func main() {
	urls := []string{
		"http://www.maybe-no-web.com/",
		"http://www.goole.com/",
		"http://www.yahoo.com/",
		"http://www.baidu.com/",
		"http://www.ejoy.com/",
		"http://www.441a.com/",
	}

	respCh := make(chan Response)
	for _, url := range urls {
		go worker(url, respCh)
	}

	for _ = range urls {
		resp := <-respCh
		fmt.Printf("%s -> %s\n", resp.url, resp.result)
	}
}