go-百度贴吧-纵向爬取

百度贴吧纵向爬取

上一个是横向爬取的，这个纵向爬取，具体怎么做的看代码

package main

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

func HttpGetDB(url string) (result string, err error) {
    resp, err1 := http.Get(url)
    if err1 != nil {
        err = err1
        return
    }
    defer resp.Body.Close()

    buf := make([]byte, 4096)

    for {
        n, err2 := resp.Body.Read(buf)
        if n == 0 {
            break
        }
        if err2 != nil && err2 != io.EOF {
            err = err2
            return
        }
        result += string(buf[:n])
    }

    return
}

func Save2file(idx int, fileName [][]string) {
    path := "第" + strconv.Itoa(idx) + "页" + ".txt"
    f, err := os.Create(path)
    if err != nil {
        fmt.Println("os.Create err", err)
        return
    }
    defer f.Close()

    n := len(fileName)

    f.WriteString("名称\n")
    for i := 0; i < n; i++ {
        f.WriteString(fileName[i][1] + "\n")
    }
}

func SpiderPageDB(idx int, page chan int) {
    //  url := "https://movie.douban.com/review/best/?start=" + strconv.Itoa((idx-1)*20)
    //  url := "https://movie.douban.com/annual/2018?source=navigation#" + strconv.Itoa(idx-1)
    //  https://movie.douban.com/review/best/?start=20

    url := "https://tieba.baidu.com/f?kw=vue&ie=utf-8&pn=" + strconv.Itoa((idx-1)*50)

    result, err := HttpGetDB(url)
    if err != nil {
        fmt.Println("HttpGet2 err", err)
        return
    }
    //  fmt.Println("result=", result)
    ret := regexp.MustCompile(`=1):")
    fmt.Scan(&start)
    fmt.Print("请输入终止页（>=start）:")
    fmt.Scan(&end)

    toWork(start, end)
}