Scrapy 蜘蛛：從 img src 下載所有圖像

Question

我從網站上抓取了一些鏈接，並使用 scrapy 蜘蛛進行抓取。

 # image urls
        look_inside_image_urls = response.xpath('//ul[@class="list-unstyled pages"]/li').extract_first()

        for i in look_inside_image_urls:
            print("============> look_inside_image_urls ===============>", i)

但我沒有得到任何類型值。 只是我是李的任意數量的圖像鏈接。 我通過循環下載。

這是我的 HTML 代碼

<div class="lookInsideDiv" style="display: block;">
                <div class="exitBtn"><i class="ion-close-round"></i></div>
                <div class="pagesArea">
                    <ul class="list-unstyled pages">
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/fc955fd4b_117698-1.jpg"></li>
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/11f94595e_117698-2.jpg"></li>
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/555959ec2_117698-3.jpg"></li>
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/81b071d0c_117698-4.jpg"></li>
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/30ef8b806_117698-5.jpg"></li>
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/6cb40391f_117698-6.jpg"></li>
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/a41c97880_117698-7.jpg"></li>
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/d1a4bff6e_117698-8.jpg"></li>
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/9503cfda1_117698-9.jpg"></li>
                        
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/54f1774ee_117698-10.jpg"></li>
                        
                    </ul>
                </div>
            </div>

我只想像這樣獲取li里面的所有鏈接

https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/fc955fd4b_117698-1.jpg
https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/fc955fd4b_117698-1.jpg
https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/fc955fd4b_117698-1.jpg
https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/fc955fd4b_117698-1.jpg

Answer 1

試試這個，提取所有圖像使用 extract() （它的返回列表）而不是 extract_first()(return first item) 方法。

look_inside_image_urls = response.xpath('//ul[@class="list-unstyled pages"]/li/img/@src').extract()

for i in look_inside_image_urls:
    print("============> look_inside_image_urls ===============>", i)

編輯

from scrapy.selector import Selector

html ="""<div class="lookInsideDiv" style="display: block;">
                <div class="exitBtn"><i class="ion-close-round"></i></div>
                <div class="pagesArea">
                    <ul class="list-unstyled pages">
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/fc955fd4b_117698-1.jpg"></li>
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/11f94595e_117698-2.jpg"></li>
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/555959ec2_117698-3.jpg"></li>
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/81b071d0c_117698-4.jpg"></li>
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/30ef8b806_117698-5.jpg"></li>
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/6cb40391f_117698-6.jpg"></li>
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/a41c97880_117698-7.jpg"></li>
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/d1a4bff6e_117698-8.jpg"></li>
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/9503cfda1_117698-9.jpg"></li>
                            <li><img src="https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/54f1774ee_117698-10.jpg"></li>
                    </ul>
                </div>
            </div>"""


data = Selector(text=html)
look_inside_image_urls = data.xpath('//*/ul[@class="list-unstyled pages"]/li/img/@src').extract()
for i in look_inside_image_urls:
    print("============> look_inside_image_urls ===============>", i)


============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/fc955fd4b_117698-1.jpg
============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/11f94595e_117698-2.jpg
============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/555959ec2_117698-3.jpg
============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/81b071d0c_117698-4.jpg
============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/30ef8b806_117698-5.jpg
============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/6cb40391f_117698-6.jpg
============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/a41c97880_117698-7.jpg
============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/d1a4bff6e_117698-8.jpg
============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/9503cfda1_117698-9.jpg
============> look_inside_image_urls ===============> https://s3-ap-southeast-1.amazonaws.com/rokomari110/LookInside20190827/54f1774ee_117698-10.jpg