#!usr/bin/env python


#-*- coding: utf-8 -*-


import os
import urllib2
import urllib
import cookielib
import xml.etree.ElementTree as ET


#-----------------------------------------------------------------------------
# Login in www.***.com.cn
def ChinaBiddingLogin(url, username, password):
        # Enable cookie support for urllib2
        cookiejar=cookielib.CookieJar()
        urlopener=urllib2.build_opener(urllib2.HTTPCookieProcessor(cookiejar))
        urllib2.install_opener(urlopener)
        
        urlopener.addheaders.append(('Referer', 'http://www.chinabidding.com.cn/zbw/login/login.jsp'))
        urlopener.addheaders.append(('Accept-Language', 'zh-CN'))
        urlopener.addheaders.append(('Host', 'www.chinabidding.com.cn'))
        urlopener.addheaders.append(('User-Agent', 'Mozilla/5.0 (compatible; MISE 9.0; Windows NT 6.1); Trident/5.0'))
        urlopener.addheaders.append(('Connection', 'Keep-Alive'))


        print 'XXX Login......'


        imgurl=r'http://www.*****.com.cn/zbw/login/image.jsp'
        DownloadFile(imgurl, urlopener)
        authcode=raw_input('Please enter the authcode:')
        #authcode=VerifyingCodeRecognization(r"http://192.168.0.106/images/code.jpg")


        # Send login/password to the site and get the session cookie
        values={'login_id':username, 'opl':'op_login', 'login_passwd':password, 'login_check':authcode}
        urlcontent=urlopener.open(urllib2.Request(url, urllib.urlencode(values)))
        page=urlcontent.read(500000)


        # Make sure we are logged in, check the returned page content
        if page.find('login.jsp')!=-1:
                print 'Login failed with username=%s, password=%s and authcode=%s' \
                                % (username, password, authcode)
                return False
        else:
                print 'Login succeeded!'
                return True


#-----------------------------------------------------------------------------
# Download from fileUrl then save to fileToSave
# Note: the fileUrl must be a valid file
def DownloadFile(fileUrl, urlopener):
        isDownOk=False


        try:
                if fileUrl:
                        outfile=open(r'/var/www/images/code.jpg', 'w')
                        outfile.write(urlopener.open(urllib2.Request(fileUrl)).read())
                        outfile.close()


                        isDownOK=True
                else:
                        print 'ERROR: fileUrl is NULL!'
        except:
                isDownOK=False


        return isDownOK


#------------------------------------------------------------------------------
# Verifying code recoginization
def VerifyingCodeRecognization(imgurl):
        url=r'http://192.168.0.119:800/api?'
        user='admin'
        pwd='admin'
        model='ocr'
        ocrfile='cbi'


        values={'user':user, 'pwd':pwd, 'model':model, 'ocrfile':ocrfile, 'imgurl':imgurl}
        data=urllib.urlencode(values)


        try:
                url+=data
                urlcontent=urllib2.urlopen(url)
        except IOError:
                print '***ERROR: invalid URL (%s)' % url


        page=urlcontent.read(500000)


        # Parse the xml data and get the verifying code
        root=ET.fromstring(page)
        node_find=root.find('AddField')
        authcode=node_find.attrib['data']


        return authcode


#------------------------------------------------------------------------------
# Read users from configure file
def ReadUsersFromFile(filename):
        users={}
        for eachLine in open(filename, 'r'):
                info=[w for w in eachLine.strip().split()]
                if len(info)==2:
                        users[info[0]]=info[1]


        return users


#------------------------------------------------------------------------------
def main():
        login_page=r'http://www.***.com.cnlogin/login.jsp'
        download_page=r'http://www.***.com.cn***/***?record_id='


        start_id=8593330
        end_id=8595000


        now_id=start_id
        Users=ReadUsersFromFile('users.conf')
        while True:
                for key in Users:
                        if ChinaBiddingLogin(login_page, key, Users[key]):
                                for i in range(3):
                                        pageUrl=download_page+'%d' % now_id
                                        urlcontent=urllib2.urlopen(pageUrl)


                                        filepath='./download/%s.html' % now_id
                                        f=open(filepath, 'w')
                                        f.write(urlcontent.read(500000))
                                        f.close()


                                        now_id+=1
                        else:
                                continue
#------------------------------------------------------------------------------


if __name__=='__main__':
        main()

python登陸網頁並處理網站session和cookie

import cookielib, urllib, urllib2

login = 'ismellbacon123@yahoo.com'
password = 'login'

# Enable cookie support for urllib2
cookiejar = cookielib.CookieJar()
urlOpener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cookiejar))

# Send login/password to the site and get the session cookie
values = {'login':login, 'password':password }
data = urllib.urlencode(values)
request = urllib2.Request("http://www.imdb.com/register/login", data)
url = urlOpener.open(request)  # Our cookiejar automatically receives the cookies
page = url.read(500000)

# Make sure we are logged in by checking the presence of the cookie "id".
# (which is the cookie containing the session identifier.)
if not 'id' in [cookie.name for cookie in cookiejar]:
    raise ValueError, "Login failed with login=%s, password=%s" % (login,password)

print "We are logged in !"

# Make another request with our session cookie
# (Our urlOpener automatically uses cookies from our cookiejar)
url = urlOpener.open('http://imdb.com/find?s=all&q=grave')
page = url.read(200000)

如果你還在為python的各種urllib和urlibs，cookielib 頭疼，或者還還在為python模擬登入和抓取資料而抓狂，那麼來看看我們推薦的requests，python採集資料模擬登入必備利器！

這也是python推薦的HTTP客戶端庫：

本文就以一個模擬登入的例子來加以說明，至於採集大家就請自行發揮吧。

程式碼很簡單，主要是展現python的requests庫的簡單至極，程式碼如下：

s = requests.session()

 data = {'user':'使用者名稱','passdw':'密碼'} 

#post 換成登入的地址， 

res=s.post('http://www.xxx.net/index.php?action=login',data); 

#換成抓取的地址 

s.get('http://www.xxx.net/archives/155/');

 有幾種方法。一種是設定環境變數http_proxy，它會自動訪問這個。 另外一種是你使用urllib2的時候，在引數里加上代理。還有一個是urllib上指定。

比如

import urllib
urllib.urlopen(某網站，proxyes={'http:':"某代理IP地址:代理的埠"})