python网页请求urllib2模块简单封装代码

这篇文章主要分享一个python网页请求模块urllib2模块的简单封装代码。

原文转自：http://www.jbxue.com/article/16585.html

对python网页请求模块urllib2进行简单的封装。
例子：

#!/usr/bin/python

#coding: utf-8
import base64
import urllib
import urllib2
import time
class SendRequest:
'''
This class use to set and request the http, and get the info of response.
e.g. set Authorization Type, request tyep..
e.g. get html content, state code, cookie..
SendRequest('http://10.75.0.103:8850/2/photos/square/type.json', 
data='source=216274069', type='POST', auth='base',
user='zl2010', password='111111')
'''
def __init__(self, url, data=None, type='GET', auth=None, user=None, password=None, cookie = None, **header):
'''
url:request, raise error if none
date: data for post or get, must be dict type
type: GET, POST
auth: option, if has the value must be 'base' or 'cookie'
user: user for auth
password: password for auth
cookie: if request with cookie 
other header info: 
e.g. referer='www.sina.com.cn' 
'''
self.url = url
self.data = data
self.type = type
self.auth = auth
self.user = user
self.password = password 
self.cookie = cookie

if 'referer' in header:
self.referer = header[referer]
else:
self.referer = None

if 'user-agent' in header:
self.user_agent = header[user-agent]
else:
self.user_agent = None

self.setup_request()
self.send_request() 
def setup_request(self):
'''
setup a request 
'''
if self.url == None or self.url == '':
raise 'The url should not empty!'

# set request type 
#print self.url
#print self.type
#print self.data
#print self.auth
#print self.user
#print self.password 
if self.type == 'POST': 
self.Req = urllib2.Request(self.url, self.data)
elif self.type == 'GET':
if self.data == None:
self.Req = urllib2.Request(self.url)
else:
self.Req = urllib2.Request(self.url + '?' + self.data)
else:
print 'The http request type NOT support now!'

##set auth type 
if self.auth == 'base':
if self.user == None or self.password == None:
raise 'The user or password was not given!'
else:
auth_info = base64.encodestring(self.user + ':' + self.password).replace('
','')
auth_info = 'Basic ' + auth_info 
#print auth_info 
self.Req.add_header("Authorization", auth_info)
elif self.auth == 'cookie':
if self.cookie == None:
raise 'The cookie was not given!'
else:
self.Req.add_header("Cookie", self.cookie) 
else:
pass ##add other auth type here
##set other header info 
if self.referer:
self.Req.add_header('referer', self.referer)
if self.user_agent:
self.Req.add_header('user-agent', self.user_agent)


def send_request(self): 
'''
send a request 
'''
# get a response object 
try:
self.Res = urllib2.urlopen(self.Req)
self.source = self.Res.read()
self.goal_url = self.Res.geturl()
self.code = self.Res.getcode()
self.head_dict = self.Res.info().dict
self.Res.close()
except urllib2.HTTPError, e:
self.code = e.code
print e

def get_code(self):
return self.code

def get_url(self):
return self.goal_url

def get_source(self): 
return self.source

def get_header_info(self):
return self.head_dict
def get_cookie(self):
if 'set-cookie' in self.head_dict:
return self.head_dict['set-cookie']
else:
return None

def get_content_type(self):
if 'content-type' in self.head_dict:
return self.head_dict['content-type']
else:
return None

def get_expires_time(self):
if 'expires' in self.head_dict:
return self.head_dict['expires']
else:
return None

def get_server_name(self):
if 'server' in self.head_dict:
return self.head_dict['server']
else:
return None

def __del__(self):
pass 
__all__ = [SendRequest,]

if __name__ == '__main__':
'''
The example for using the SendRequest class 
'''
value = {'source':'216274069'}
data = urllib.urlencode(value)
url = 'http://10.75.0.103:8850/2/photos/square/type.json'
user = 'wz_0001'
password = '111111'
auth = 'base'
type = 'POST'
t2 = time.time()
rs = SendRequest('http://www.google.com')
#rs = SendRequest(url, data=data, type=type, auth=auth, user=user, password=password)
print 't2: ' + str(time.time() - t2)
print '---------------get_code()---------------'
print rs.get_code()
print '---------------get_url()---------------'
print rs.get_url()
print '---------------get_source()---------------'
print rs.get_source()
print '---------------get_cookie()---------------'
print rs.get_cookie()
rs = None