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爬虫(scrapy中的ImagesPipeline)

在使用ImagesPipeline对妹子图网站图片进行下载时,遇到302错误,页面被强制跳转。

解决办法如下:

# -*- coding: utf-8 -*-

# Define your item pipelines here
#
# Don‘t forget to add your pipeline to the ITEM_PIPELINES setting
# See: http://doc.scrapy.org/en/latest/topics/item-pipeline.html
from scrapy.pipelines.images import ImagesPipeline
import scrapy
class MeizituPipeline(object):
    def process_item(self, item, spider):
        return item

class download_pic_pipeline(ImagesPipeline):
    header = {
        User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWeb            Kit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.109 Safari/537.36,
        Referer: http://img.mmjpg.com/
    }
    def get_media_requests(self, item, info):
        for i in item[image_urls]:
            yield scrapy.Request(url= i,headers=self.header)

down_load_pic_pipeline类继承了ImagesPipeline类,我们重写get_meidia_requests方法,在请求图片时,加上一个hearders,多次尝试发现参数Referer是该网站用来反爬的关键点,我们添加这个参数,并设置为http://img.mmjpg.com/   ,运行后状态码为200,问题得到解决!

爬虫(scrapy中的ImagesPipeline)