python 实现校园网自动登录

#coding=utf8
import urllib,urllib2
import base64
import os , subprocess

username = '你的base64加密过的校园网用户名'
password  = '你的base64加密过的校园网密码'
url = 'https://login.xxxx.edu.cn/auth_action.php'   # 校园网登陆验证地址

def isConnecting():
    # Judge network connect status
    res = subprocess.call('ping 8.8.8.8 -n 1',shell=True)
    return False if res else True

def Signon():
    # Sign on
    data = {
        'action' : 'login',
        'username' : base64.decodestring(username),
        'password' : base64.decodestring(password),
        'ac_id' : ,
        'save_me' : ,
        'ajax' : ,
    }
    data = urllib.urlencode(data)
    response = urllib2.urlopen(url,data=data)
    response = response.read().decode('utf8')
    print response

def main():
    while True:
        if not isConnecting():
            # no-connect status, attempt sign on
            Signon()

if __name__=="__main__":
    try:
        main()
    except Exception,e:
        print '[ERROR]:',
        print e