package main

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

func errCheck(err error) {
	if err != nil {
		log.Fatalln("Error happened %v\n",err)
	}
}

func responseSize(url string, out chan Page) {
	fmt.Println("Getting ",url)
	response,err := http.Get(url)
	errCheck(err)
	defer response.Body.Close()

	body,err := io.ReadAll(response.Body)
	errCheck(err)

	out <- Page{URL: url, Size: len(body)}

}

type Page struct {
	URL string
	Size int
}

func main() {
	size := make(chan Page)
	urls :=[]string{"https://google.com","https://golang.org","https://golang.org/doc"}
	for _,url := range urls {
		go responseSize(url,size)
	}
	fmt.Println("--------")
	for i:=0; i < len(urls);i++ {
		page := <- size
		fmt.Printf("%s: %d\n",page.URL,page.Size)
	}
	fmt.Println("End main()")
}