至于我怎么知道在瀏覽器里面登錄和簽到時瀏覽器都向服務器post了什么數(shù)據(jù)的問題，可以用強大的chrome：F12->Network里面可以看得到。有的服務器登錄成功后會讓客戶端瀏覽器跳轉或者立即刷新一次頁面等等，會把登錄時向服務器post的數(shù)據(jù)刷沒掉，那么就要用到強大的抓包軟件——WireShark來分析。比如用chrome：

然后就可以寫了，構造Request Headers和要Post的Data（就是Chrome里的Form Data），ID和Pwd是明文傳輸，呵呵。

代碼

下面是代碼：

# -*- coding: cp936 -*-
'''''
Created on 2012-11-15
@author: liushuai
'''
import urllib, urllib2, cookielib, sys
class LoginXiami:
  login_header = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.79 Safari/537.4'}
  signin_header = {'User-Agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.4 (KHTML, like Gecko) Chrome/22.0.1229.79 Safari/537.4', 'X-Requested-With':'XMLHttpRequest', 'Content-Length':0, 'Origin':'http://www.xiami.com', 'Referer':'http://www.xiami.com/'}
  email = ''
  password = ''
  cookie = None
  cookieFile = './cookie.dat'
  def __init__(self, email, pwd):
    self.email = email
    self.password = pwd
    self.cookie = cookielib.LWPCookieJar()
    opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(self.cookie))
    urllib2.install_opener(opener)
  def login(self):
    postdata = {'email':self.email, 'password':self.password, 'done':'http://www.xiami.com', 'submit':'%E7%99%BB+%E5%BD%95'}
    postdata = urllib.urlencode(postdata)
    print 'Logining...'
    req = urllib2.Request(url='http://www.xiami.com/member/login', data=postdata, headers=self.login_header)
    result = urllib2.urlopen(req).read()
    self.cookie.save(self.cookieFile)
    result = str(result).decode('utf-8').encode('gbk')
    if 'Email 或者密碼錯誤' in result:
      print 'Login failed due to Email or Password error...'
      sys.exit()
    else :
      print 'Login successfully!'
  def signIn(self):
    postdata = {}
    postdata = urllib.urlencode(postdata)
    print 'signing...'
    req = urllib2.Request(url='http://www.xiami.com/task/signin', data=postdata, headers=self.signin_header)
    result = urllib2.urlopen(req).read()
    result = str(result).decode('utf-8').encode('gbk')
    self.cookie.save(self.cookieFile)
    try:
      result = int(result)
    except ValueError:
      print 'signing failed...'
      sys.exit()
    except:
      print 'signing failed due to unknown reasons ...'
      sys.exit()
    print 'signing successfully!'
    print self.email,'have signed', result, 'days continuously...'
if __name__ == '__main__':
  user = LoginXiami('你的登錄郵箱', '你的密碼')
  user.login()
  user.signIn()

然后運行一下腳本就可以登錄、簽到了。