Example of using urllib2 in Python to prevent 302 redirection

This article mainly introduces the example of using urllib2 in Python to prevent 302 jump, that is, to avoid 302 jump implementation. For more information, see urllib2 in python to obtain the webpage (urlopen) will be automatically redirected (301,302 ). However, sometimes we need to obtain the status information of the 302,301 page. You must obtain the debugging information before turning.

The following code avoids 302 redirection to a new webpage.

#!/usr/bin/python# -*- coding: utf-8 -*-#encoding=utf-8#Filename:states_code.py import urllib2 class RedirctHandler(urllib2.HTTPRedirectHandler):  """docstring for RedirctHandler"""  def http_error_301(self, req, fp, code, msg, headers):    pass  def http_error_302(self, req, fp, code, msg, headers):    pass def getUnRedirectUrl(url,timeout=10):  req = urllib2.Request(url)  debug_handler = urllib2.HTTPHandler(debuglevel = 1)  opener = urllib2.build_opener(debug_handler, RedirctHandler)   html = None  response = None  try:    response = opener.open(url,timeout=timeout)    html = response.read()  except urllib2.URLError as e:    if hasattr(e, 'code'):      error_info = e.code    elif hasattr(e, 'reason'):      error_info = e.reason  finally:    if response:      response.close()  if html:    return html  else:    return error_info html = getUnRedirectUrl('http://jb51.net')print html