python 爬虫之scrapy的image pipeline使用

参考官方文档：Downloading and processing files and images — Scrapy 2.5.0 documentation

 使用方法 

spiders 下的爬虫文件代码

import scrapy


class ZolSpider(scrapy.Spider):
    name = 'zol'
    allowed_domains = ['zol.com.cn']
    start_urls = ['https://desk.zol.com.cn/bizhi/9691_117173_2.html']

    def parse(self, response):
        img_url = response.xpath('//img[@id="bigImg"]/@src').getall()
        yield {
            'image_urls':img_url
        }

settings.py 

ITEM_PIPELINES = {
#    'image.pipelines.ImagePipeline': 300,
   'scrapy.pipelines.images.ImagesPipeline':200
}

# 图片下载路径
IMAGES_STORE= 'D:python_reptilescrapy中imagepipeline的使用imageimg'

自定义 imagepipeline

pipeline.py

继承ImagesPipeline类

from scrapy.pipelines.images import ImagesPipeline

class ImagePipeline(ImagesPipeline):
    def get_media_requests(self, item, info):
        return Request(item.get('key'))

注意   这个得要一致