Python中使用urllib2防止302跳轉(zhuǎn)的代碼例子

    這篇文章主要介紹了Python中使用urllib2防止302跳轉(zhuǎn)的代碼例子,即避免302跳轉(zhuǎn)的實(shí)現(xiàn),需要的朋友可以參考下。
    說明：python的urllib2獲取網(wǎng)頁(urlopen)會(huì)自動(dòng)重定向（301,302）。但是，有時(shí)候我們需要獲取302,301頁面的狀態(tài)信息。就必須獲取到轉(zhuǎn)向前的調(diào)試信息。
    下面代碼將可以做到避免302重定向到新的網(wǎng)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