goLang爬取html

package main

import (
	"fmt"
	"net/http"
	"os"
	"strconv"
)
//爬取网页内容
func HttpGet(url string)(result string ,err error){
	resp , err1 :=http.Get(url)
	if err1 !=nil{
		err = err1
		return
	}
	defer resp.Body.Close()

	//读取网页body内容
	buf := make([]byte, 1024*4 )
	for{
		n, err := resp.Body.Read(buf)
		//读取结束，或者出问题
		if n == 0 {
			fmt.Println("resp.Body.Read err = ",err)
			break
		}
		result += string(buf[:n])

	}
	return

}
func DoWork(start,end int){
	fmt.Printf("正在爬取 %d 到 %d 的页面",start,end)
	//每一页+50 https://tieba.baidu.com/f?kw=%E7%BB%9D%E5%9C%B0%E6%B1%82%E7%94%9F&ie=utf-8&pn=50
	for i:=start;i<=end;i++{
		url := "https://tieba.baidu.com/f?kw=%E7%BB%9D%E5%9C%B0%E6%B1%82%E7%94%9F&ie=utf-8&pn="+strconv.Itoa((i-1)*50)
		fmt.Println("url = ",url)
		result, err := HttpGet(url)
		if err != nil{
			fmt.Println("HttpGet err = ",err)
			continue
		}
		//把内容写入到文件
		fileName := strconv.Itoa(i) + ".html"
		f, err1 := os.Create(fileName)
		if err1 != nil{
			fmt.Println("os Create err1 = ",err1)
			continue
		}
		f.WriteString(result)
		f.Close()

	}
}
func main() {

	var start,end int
	fmt.Printf("请输入起始页:")
	fmt.Scan(&start)
	fmt.Printf("请输入终止页:")
	fmt.Scan(&end)
	DoWork(start,end)
}