Golang高并发抓取HTML图片

栏目: Html · 发布时间: 4年前

内容简介：版权所有，转载请注明：1.安装Golang2.下载爬虫包

版权所有，转载请注明： http://www.lenggirl.com/language/go-picture.html

使用准备

1.安装Golang

2.下载爬虫包

go get -v github.com/hunterhug/marmot/expert
go get -v github.com/hunterhug/marmot/miner
go get -v github.com/hunterhug/parrot/util

程序

该程序只能抓取HTML中 src="http" 中的图片, 必须带有协议头 http(s) , 其他如 data-src 和混淆在JS中的无法抓取

See: https://github.com/hunterhug/marmot/blob/master/example/lesson/lesson6.go 

package main

import (
    "errors"
    "fmt"
    "net/url"
    "strings"

    "github.com/hunterhug/marmot/expert"
    "github.com/hunterhug/marmot/miner"
    "github.com/hunterhug/parrot/util"
)

// Num of miner, We can run it at the same time to crawl data fast
var MinerNum = 5

// You can update this decide whether to proxy
var ProxyAddress interface{}

func main() {
    // You can Proxy!
    // ProxyAddress = "socks5://127.0.0.1:1080"

    fmt.Println(`Welcome: Input "url" and picture keep "dir"`)
    for {
        fmt.Println("---------------------------------------------")
        url := util.Input(`URL(Like: "http://publicdomainarchive.com")`, "http://publicdomainarchive.com")
        dir := util.Input(`DIR(Default: "./picture")`, "./picture")
        fmt.Printf("You will keep %s picture in dir %s\n", url, dir)
        fmt.Println("---------------------------------------------")

        // Start Catch
        err := CatchPicture(url, dir)
        if err != nil {
            fmt.Println("Error:" + err.Error())
        }
    }
}

// Come on!
func CatchPicture(picture_url string, dir string) error {
    // Check valid
    _, err := url.Parse(picture_url)
    if err != nil {
        return err
    }

    // Make dir!
    err = util.MakeDir(dir)
    if err != nil {
        return err
    }

    // New a worker to get url
    worker, _ := miner.New(ProxyAddress)

    result, err := worker.SetUrl(picture_url).SetUa(miner.RandomUa()).Get()
    if err != nil {
        return err
    }

    // Find all picture
    pictures := expert.FindPicture(string(result))

    // Empty, What a pity!
    if len(pictures) == 0 {
        return errors.New("empty")
    }

    // Devide pictures into several worker
    xxx, _ := util.DevideStringList(pictures, MinerNum)

    // Chanel to info exchange
    chs := make(chan int, len(pictures))

    // Go at the same time
    for num, imgs := range xxx {

        // Get pool miner
        worker_picture, ok := miner.Pool.Get(util.IS(num))
        if !ok {
            // No? set one!
            worker_temp, _ := miner.New(ProxyAddress)
            worker_picture = worker_temp
            worker_temp.SetUa(miner.RandomUa())
            miner.Pool.Set(util.IS(num), worker_temp)
        }

        // Go save picture!
        go func(imgs []string, worker *miner.Worker, num int) {
            for _, img := range imgs {

                // Check, May be Pass
                _, err := url.Parse(img)
                if err != nil {
                    continue
                }

                // Change Name of our picture
                filename := strings.Replace(util.ValidFileName(img), "#", "_", -1)

                // Exist?
                if util.FileExist(dir + "/" + filename) {
                    fmt.Println("File Exist：" + dir + "/" + filename)
                    chs <- 0
                } else {

                    // Not Exsit?
                    imgsrc, e := worker.SetUrl(img).Get()
                    if e != nil {
                        fmt.Println("Download " + img + " error:" + e.Error())
                        chs <- 0
                        return
                    }

                    // Save it!
                    e = util.SaveToFile(dir+"/"+filename, imgsrc)
                    if e == nil {
                        fmt.Printf("SP%d: Keep in %s/%s\n", num, dir, filename)
                    }
                    chs <- 1
                }
            }
        }(imgs, worker_picture, num)
    }

    // Every picture should return
    for i := 0; i < len(pictures); i++ {
        <-chs
    }

    return nil
}

解释均写, 运行后:

superpika@superpika-chen-110:~/code/src/github.com/hunterhug/marmot/example/lesson$ go run lesson6.go 

        Welcome: Input "url" and picture keep "dir"

        
        
---------------------------------------------
URL(Like: "http://publicdomainarchive.com")

DIR(Default: "./picture")

You will keep http://publicdomainarchive.com picture in dir ./picture
---------------------------------------------
SP0: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_02_03_modern.jpg
SP4: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_03_03_google_dark.png
SP2: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-003-667x1000-192684_667x675.jpg

superpika@superpika-chen-110:~/code/src/github.com/hunterhug/marmot/example/lesson$ go run lesson6.go 

        Welcome: Input "url" and picture keep "dir"

        
        
---------------------------------------------
URL(Like: "http://publicdomainarchive.com")

DIR(Default: "./picture")

You will keep http://publicdomainarchive.com picture in dir ./picture
---------------------------------------------
SP0: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_02_03_modern.jpg
SP4: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_03_03_google_dark.png
SP2: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-003-667x1000-192684_667x675.jpg
SP4: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_05_03_powered-by-wp-engine.png
SP4: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_05_03_divi.png
SP2: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-002-1000x667.jpg
SP4: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_05_03_public-domain-mark.png
SP3: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_01_03_public-domain-images-free-stock-photos008-1000x625.jpg
SP0: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_09_03_Weekly.jpg
SP1: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_11_03_free-stock-photos-public-domain-images-054-1000x667.jpg
SP3: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_10_03_instagram_dark.png
SP0: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_02_03_vintage.jpg
SP2: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-001-1000x667.jpg
SP1: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_11_03_free-stock-photos-public-domain-images-070-1000x667.jpg
SP3: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_03_03_twitter02_dark.png
SP2: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_01_03_public-domain-images-free-stock-photos001-1000x750-167066_1000x675.jpg
SP1: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-035-1000x667.jpg
SP3: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_03_03_facebook_dark.png
SP0: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_11_03_free-stock-photos-public-domain-images-060-1000x667.jpg
SP1: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-013-1000x667.jpg
---------------------------------------------
URL(Like: "http://publicdomainarchive.com")



SP4: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_05_03_powered-by-wp-engine.png
SP4: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_05_03_divi.png
SP2: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-002-1000x667.jpg
SP4: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_05_03_public-domain-mark.png
SP3: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_01_03_public-domain-images-free-stock-photos008-1000x625.jpg
SP0: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_09_03_Weekly.jpg
SP1: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_11_03_free-stock-photos-public-domain-images-054-1000x667.jpg
SP3: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_10_03_instagram_dark.png
SP0: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_02_03_vintage.jpg
SP2: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-001-1000x667.jpg
SP1: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_11_03_free-stock-photos-public-domain-images-070-1000x667.jpg
SP3: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_03_03_twitter02_dark.png
SP2: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_01_03_public-domain-images-free-stock-photos001-1000x750-167066_1000x675.jpg
SP1: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-035-1000x667.jpg
SP3: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2014_03_03_03_facebook_dark.png
SP0: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_11_03_free-stock-photos-public-domain-images-060-1000x667.jpg
SP1: Keep in ./picture/http_04__03__03_publicdomainarchive.com_03_wp-content_03_uploads_03_2017_03_09_03_free-stock-photos-public-domain-images-013-1000x667.jpg
---------------------------------------------
URL(Like: "http://publicdomainarchive.com")

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以上所述就是小编给大家介绍的《Golang高并发抓取HTML图片》，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对 码农网 的支持！

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