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