scrapy批量下载图片

# -*- coding: utf-8 -*-
import scrapy
from rihan.items import RihanItem

class RihanspiderSpider(scrapy.Spider):
    name = "rihanspider"
    # allowed_domains = ["*******"]
    start_urls = [**************']

    def parse(self, response):
        # print(response.text)
        for each in response.css('.img li'):
            index_url = each.css('a::attr(href)').extract_first()
            # print(index_url)
            yield scrapy.Request(url=index_url,callback=self.parse_detail)

        next = response.xpath('//a[contains(.,"下一页")]/@href').extract_first()
        if next:
            url = response.urljoin(next)
            yield scrapy.Request(url, callback=self.parse)

    def parse_detail(self, response):

        item = RihanItem()
        image_title = response.css('.width .weizhi h1::text').extract_first()
        item['image_title'] = image_title

        for each in response.css('.content'):
            # 注意这里如果想用scrapy内置的下载图片模块,这里要用extract()而不是extract_first()
            image_url = each.css('img::attr(src)').extract()
            # print(image_url)
            item['image_url'] = image_url

            yield item

        next = response.xpath('//a[contains(.,"下一页")]/@href').extract_first()
        if next:
            next_url = response.urljoin(next)
            yield scrapy.Request(url=next_url, callback=self.parse_detail)

ITEM_PIPELINES = {'scrapy.pipelines.images.ImagesPipeline': 1}

IMAGES_URLS_FIELD = 'image_url'
IMAGES_STORE = r'.'