urllib2.open(req).read() 报403的错误:怎么办?

时间:2023-02-12 07:39:52
urllib2.open(req).read() 报403的错误:怎么办?

http://www.douban.com/group/topic/18095751/

heads = {'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', 
'Accept-Charset':'GB2312,utf-8;q=0.7,*;q=0.7', 
'Accept-Language':'zh-cn,zh;q=0.5', 
'Cache-Control':'max-age=0', 
'Connection':'keep-alive', 
'Host':HOST, 
'Keep-Alive':'115', 
'Referer':url, 
'User-Agent':'Mozilla/5.0 (X11; U; Linux x86_64; zh-CN; rv:1.9.2.14) Gecko/20110221 Ubuntu/10.10 (maverick) Firefox/3.6.14'}

opener = urllib2.build_opener(urllib2.HTTPCookieProcessor()) 
urllib2.install_opener(opener) 
req = urllib2.Request(url) 
opener.addheaders = heads.items() 
page = opener.open(req).read()

有些网站可能配置了“防爬”的东东,当用urllib2去get数据的时候return:403,浏览器却是正常的,可以在urllib2的请求中: 
1,添加cookies 
2,添加http headers

head中不要包含(Accept-Encoding,If-Modified-Since)这两个东东: 
'Accept-Encoding':'gzip,deflate',(返回的是压缩后的zip包) 
'If-Modified-Since':'Fri, 04 Mar 2011 06:35:06 GMT',(返回Error 304 Not Modified)