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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