Python中使用urllib2防止302跳轉的代碼例子

說明：python的urllib2擷取網頁(urlopen)會自動重新導向（301,302）。但是，有時候我們需要擷取302,301頁面的狀態資訊。就必須擷取到轉向前的調試資訊。

下面代碼將可以做到避免302重新導向到新的網頁

#!/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

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