import urllib
import urllib.request
import gzip
import http
import http.cookiejar

#定义一个方法用于生成请求头信息，处理cookie  
def getOpener(head):
 # 初始化一个CookieJar来处理Cookie <pre name="code" class="python"> 
 cj = http.cookiejar.CookieJar()
 #实例化一个opener
 pro = urllib.request.HTTPCookieProcessor(cj)
 opener = urllib.request.build_opener(pro)
 
 header = []
 for key, value in head.items():
  elem = (key, value)
  header.append(elem)
 opener.addheaders = header
 return opener
 
def ungzip(data):
#定义一个方法来解压返回信息
 try:     # 尝试解压
  print(‘正在解压.....‘)
  data = http://www.mamicode.com/gzip.decompress(data)
  print(‘解压完毕!‘)
 except:
  print(‘未经压缩, 无需解压‘)
 return data
 
 
#执行操作，就是登陆
# header 这个表示封装成消息头的参数，参数类型是字典
#postDict 这个是用户名和密码的字典参数

def  login(header,url,postDict):
 opener = getOpener(header)
 postData = http://www.mamicode.com/urllib.parse.urlencode(postDict).encode()
 op = opener.open(url, postData)
 data = http://www.mamicode.com/op.read()
 data = http://www.mamicode.com/ungzip(data)
 print(data)
if  __name__ == ‘__main__‘:
 #封装消息头，伪装成浏览器
 header = {
  ‘Host‘: ‘pcpre2.xjuke.com‘,
  ‘Connection‘: ‘keep-alive‘,
  ‘Accept-Language‘: ‘zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3‘,
  ‘Accept‘: ‘application/json, text/plain, */*‘,
  ‘User-Agent‘: ‘Mozilla/5.0 (Windows NT 10.0; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0‘,
  ‘Accept-Encoding‘: ‘gzip, deflate‘,
  ‘Content-Type‘: ‘application/json;charset=utf-8‘,
  ‘Referer‘: ‘http://pcpre2.xjuke.com/?c=q-5ce/‘,
  ‘Content-Length‘: ‘58‘
 }
 #用户名和密码
 postDict = {
  ‘username‘: XXX,
  ‘password‘: XX,
  ‘wechatCode‘:‘q-5ce‘
 }
 login(header,‘XXXXX‘,postDict)

Python 模拟登陆