环境
操作系统:Windows 7
Python版本:2.7.9
过程
打开谷歌浏览器;打开1元夺宝商品列表页面;随便点击一个商品,按F12调用开发者工具,选择“Network”标签,筛选“XHR”,再单击页面上的“夺宝参与记录”;观察开发者工具,找到返回JSON格式数据的URL,如下图:从上图的URL返回的JSON格式数据我们可以得知参与夺宝的用户数(totalCnt),每个用户的头像链接前缀(avatarPrefix);随便点击一个用户,从开发者工具中可以得知用户头像的URL是由头像链接前缀和“160.jpeg”组成的。代码
# -*- coding: utf-8 -*-import sysreload(sys)sys.setdefaultencoding('utf-8')'''作者:昨夜星辰'''import reimport osimport requestsfrom bs4 import BeautifulSoup# 创建一个用于存放头像的文件夹folder = u'头像'os.mkdir(folder)# 用于存放用户的cidcidList = []# 用于头像计数picCnt = 1url = '/list.html'bs = BeautifulSoup(requests.get(url).text, 'lxml')for div in bs('div', 'w-goods w-goods-l w-goods-ing'):gid = div['data-gid']period = div['data-period']url = '/record/getDuobaoRecord.do?pageNum=1&pageSize=50&totalCnt=0&gid=%s&period=%s' % (gid, period)json = requests.get(url).json()totalCnt = json['result']['totalCnt']for pageNum in range(1, totalCnt / 50 + 1):url = '/record/getDuobaoRecord.do?pageNum=%d&pageSize=50&totalCnt=%d&gid=%s&period=%s' % (pageNum, totalCnt, gid, period)json = requests.get(url).json()for _list in json['result']['list']:cid = _list['user']['cid']if cid in cidList:continuecidList.append(cid)avatarPrefix = _list['user']['avatarPrefix']if avatarPrefix:url = avatarPrefix + '160.jpeg'filename = folder + '\\' + re.search(r'.*/(.*)', url).group(1)print u'正在保存第%d个头像...' % picCntpicCnt += 1with open(filename, 'wb') as f:f.write(requests.get(url).content)
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