python urllib2处理重定向的问题

需求：因为urllib2自动处理了重定向，如果取到某一步重定向的Location字段？

重定义urllib2.HTTPRedirectHandler，把重定向过程中的Location都取出来，就OK，如下代码：

class SmartRedirectHandler(urllib2.HTTPRedirectHandler):

RedURLs301 = []

RedURLs302 = []

def Getredurl301(self):

return SmartRedirectHandler.RedURLs301

def Getredurl302(self):

return SmartRedirectHandler.RedURLs302

def http_error_301(self, req, fp, code, msg, headers):

if headers.has_key("Location"):

SmartRedirectHandler.RedURLs301.append(headers["Location"])

result = urllib2.HTTPRedirectHandler.http_error_301(

self, req, fp, code, msg, headers)

return result

def http_error_302(self, req, fp, code, msg, headers):

if headers.has_key("Location"):

SmartRedirectHandler.RedURLs302.append(headers["Location"])

result = urllib2.HTTPRedirectHandler.http_error_302(

self, req, fp, code, msg, headers)

return result

opener = urllib2.build_opener(SmartRedirectHandler)