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)的實現(xiàn),需要的朋友可以參考下。

說明：python的urllib2獲取網(wǎng)頁(urlopen)會自動重定向（301,302）。但是，有時候我們需要獲取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