go语言爬取豆瓣的电影名称，导演和评分

package main

import (
    "fmt"
    "io"
    "net/http"
    "os"
    "regexp"
    "strconv"
)

func main() {
    var start, end int
    fmt.Println("请输入要爬取的开始页面：")
    fmt.Scan(&start)
    fmt.Println("请输入要爬取的结束的界面：")
    fmt.Scan(&end)
    ToWork(start, end)
}

//爬取的程序
func ToWork(start, end int) {
    fmt.Printf("要爬取的是从第%d到%d页", start, end)
    page := make(chan int)
    for i := start; i <= end; i++ {
        go DoMain(i, page)
    }
    for i := start; i <= end; i++ {
        <-page
    }
}
func DoMain(index int, page chan int) {
    //获取url
    url := "https://movie.douban.com/top250?start=" + strconv.Itoa((index-1)*25) + "&filter="
    result, err := HttpGet1(url)
    if err != nil {
        fmt.Printf("url加载错误%s", err)
        return
    }
    namereg := regexp.MustCompile(`<img width="100" alt="(?s:(.*?))"`)
    editorreg := regexp.MustCompile(`导演: (?s:(.*?))&nbsp;&nbsp;`)
    scorereg := regexp.MustCompile(` <span class="rating_num" property="v:average">(?s:(.*?))</span>`)
    name := namereg.FindAllStringSubmatch(result, -1)
    editor := editorreg.FindAllStringSubmatch(result, -1)
    score := scorereg.FindAllStringSubmatch(result, -1)
    SaveFile(index, name, editor, score)
    //写入chan防止程序提前结束
    page <- index
}
func HttpGet1(url string) (result string, err error) {
    resp, err1 := http.Get(url)
    if err1 != nil {
        err = err1 //峰会钻杆数内部传递给调用者
    }
    defer resp.Body.Close()
    //循环读取网页数据1
    buf := make([]byte, 4096)
    for {
        n, err2 := resp.Body.Read(buf)
        if n == 0 {
            fmt.Println("读取网页完成")
            break
        }
        if err2 != nil && err2 != io.EOF {
            err = err2
            return
        }
        result += string(buf[:n])
    }
    return
}
func SaveFile(index int, name, editor, score [][]string) {
    f, err := os.Create("第" + strconv.Itoa(index) + "页.txt")
    if err != nil {
        fmt.Println("文件打开错误", err)
        return
    }
    defer f.Close()
    n := len(editor)
    _, _ = f.WriteString("电影名称" + "					" + "导演" + "						" + "电影评分" + "							" + "
")
    for i := 0; i < n; i++ {
        _, _ = f.WriteString(name[i][1] + "			" + editor[i][1] + "			" + score[i][1] /*+ "			" + year[i][1]*/ + "
")
    }
}