爬个豆瓣图片，记录个小问题，发现爬取豆瓣原图的时候拿不到数据，返回为空，爬小图可以，爬其他网站的也都正常，最后发现是header中If-Modified-Since这个参数的原因，加上了就拿不到数据，去掉就行。文章来源地址https://www.toymoban.com/news/detail-701356.html
import requests
headers = {
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7',
'Accept-Language': 'zh-CN,zh;q=0.9,ru;q=0.8,en;q=0.7,zh-TW;q=0.6',
'Cache-Control': 'max-age=0',
'Connection': 'keep-alive',
# 'If-Modified-Since': 'Sun, 03 Nov 2019 04:42:19 GMT',
'Referer': 'https://movie.douban.com/celebrity/1010504/photo/2421104812/',
'Sec-Fetch-Dest': 'document',
'Sec-Fetch-Mode': 'navigate',
'Sec-Fetch-Site': 'cross-site',
'Sec-Fetch-User': '?1',
'Upgrade-Insecure-Requests': '1',
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36',
'sec-ch-ua': '"Chromium";v="116", "Not)A;Brand";v="24", "Google Chrome";v="116"',
'sec-ch-ua-mobile': '?0',
'sec-ch-ua-platform': '"Windows"',
}
response = requests.get('https://img2.doubanio.com/view/photo/raw/public/p2421104812.jpg', headers=headers)
content = response.content
with open('temp.jpg','wb') as f:
f.write(content)文章来源：https://www.toymoban.com/news/detail-701356.html
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