之前开始学习scrapy,接触了AJax异步加载。一直没放到自己博客,趁现在不忙,也准备为下一个爬虫做知识储存,就分享给大家。
还是从爬取图片开始,先上图给大家看看成果,QAQ。
一、图片加载的方法
1.1:网页源码__javascript加载数据
1.2:F12审查元素:滑动滑块,图片开始不断加载,
1.3:json数据:"http://image.so.com/zj?ch=beauty&sn=30&listtype=new&temp=1"
图片的URL储存在["list"]["qhimg_url"]
二、实现代码image.py.items.py,middlewares.py,settings.py,pipelines.py在我之前博客中能找到,在这里就不展示了,也可以进我的github:
# -*- coding: utf-8 -*-import scrapyfrom Tupian360.items import Tupian360Itemimport jsonimport pdbfrom Tupian360.settings import USER_AGENTimport randomclass ImageSpider(scrapy.Spider): ???name = ‘image‘ ???allowed_domains = [‘image.so.com‘] ???pager_count = 0 ???headers = { ???????‘Accept‘: ‘application/json, text/javascript, */*; q=0.01‘, ???????‘Accept-Encoding‘: ‘gzip, deflate‘, ???????‘Accept-Language‘: ‘zh-CN,zh;q=0.9‘, ???????‘Connection‘: ‘keep-alive‘, ???????‘Content-Length‘: ‘11‘, ???????‘Content-Type‘: ‘application/x-www-form-urlencoded; charset=UTF-8‘, ???????‘Host‘: ‘image.so.com‘, ???????‘Origin‘: ‘image.so.com‘, ???????‘Referer‘: ‘http://image.so.com/zj?ch=beauty&sn=%s&listtype=new&temp=1‘%pager_count, ???????‘User-Agent‘: USER_AGENT, ???????‘X-Requested-With‘: ‘XMLHttpRequest‘, ???} ???old_urls ??= ‘http://image.so.com/zj?ch=beauty&sn=%s&listtype=new&temp=1‘ ???start_urls = [old_urls%pager_count] ???def parse(self, response): ???????tupian = Tupian360Item() ???????sel = json.loads(response.body.decode(‘utf8‘)) ???????counts = sel[‘count‘] ???????self.pager_count += int(counts) ???????new_url = self.old_urls%self.pager_count ???????for link in sel[‘list‘]: ???????????tupian[‘image_urls‘] = link[‘qhimg_url‘] ???????????yield tupian ???????yield scrapy.Request(new_url,callback=self.parse)?scrapy--json(360美图)
原文地址：https://www.cnblogs.com/eilinge/p/9838266.html