Python网页抓取、模拟登录

用python抓取网页是非常简单的事，简单的几行代码就可以解决。。。这里稍微记录一下

需要引用的包有主要是 urllib2，urllib也可以引入，具体 看代码

# -------------------------------------------------------------------------------

#  Name:        模拟登录web

#  Purpose:

#

#  Author:      huwei

#

#  Created:     26/10/2010

#  Copyright:   (c) huwei 2010

#  Licence:     <your licence>

# -------------------------------------------------------------------------------

# !/usr/bin/env python

import  time,urllib2,urllib

def  main():

     # 登录博客园

    loginCNblogs()

     pass

# 登录博客园

def  loginCNblogs():

     try :

         # 设置 cookie

        cookies  =  urllib2.HTTPCookieProcessor()

        opener  =  urllib2.build_opener(cookies)

        urllib2.install_opener(opener)

        parms  =  { " tbUserName " : " 用户名 " , " tbPassword " : " 密码 " , " __EVENTTARGET " : " btnLogin " , " __EVENTARGUMENT " : "" ,

         " __VIEWSTATE " : " /wEPDwULLTExMDE0MzIzNDRkGAEFHl9fQ29udHJvbHNSZXF1aXJlUG9zdEJhY2tLZXlfXxYBBQtjaGtSZW1lbWJlcmcJekJlt5rFwfnjeMMnX9V58Xhg " ,

         " __EVENTVALIDATION " : " /wEWBQKit6iCDALyj/OQAgK3jsrkBALR55GJDgKC3IeGDK6TQlRlirS2Zja1Lmeh02u4XMwV " ,

         " txtReturnUrl " : " http://bboy.cnblogs.com " }

        loginUrl  =   " http://passport.cnblogs.com/login.aspx "

        login  =  urllib2.urlopen(loginUrl,urllib.urlencode(parms))

         # print(unicode(login.read(),"utf8"))

         # 显示配置页面

        avatar  =  urllib2.urlopen( " http://home.cnblogs.com/set/avatar/ " )

         # print(avatar.read().decode("utf8"))

     except  Exception,e:

         print (e)

     pass

if   __name__   ==   ' __main__ ' :

    main()

获取 网页很简单 直接 urllib2.urlopen(url).read() 就可以得到网页源码

这里是抓取登录后的页面，所有开头需要设置cookie

cookies  =  urllib2.HTTPCookieProcessor()

opener  =  urllib2.build_opener(cookies)

urllib2.install_opener(opener)

设置完 cookie以后 再使用 urllib2.urlopen()方法就可以带上你登录成功的cookie了

转载于:https://www.cnblogs.com/bboy/archive/2010/10/29/1864537.html