python programm to log into the web page

Question

Does anyone knows what\'s wrong in this code ? When I run it I get same HTML page back.

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

from http import cookiejar
import urllib.reques         


        

Answer 1

Login into a web applicaction by script may be trivial or awfully complex, depending on how the login page is organized. In my experience, the only foolproof way is :

• use a network spy like wireshark
• spy a full successful login sequence from a true browser
• until successful loop :
  • try to reproduce it with the script
  • spy the login sequence from the script and analyze differences

IMHO using urllib2 or requests make little differences. The only tool that is much better at that would be mechanize, but unfortunately it seems not to be ported to Python 3

Answer 2

       urllib.request
       import urllib.parse
       from http import cookiejar
       from bs4 import BeautifulSoup

      url = "http://securityoverride.com/login.php"
      name = "username"
      passw = "password"

      def Login():
       cj = cookiejar.CookieJar()
       user_agent = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'
       headers = { 'User-Agent' : user_agent }
       redirect =urllib.request.HTTPRedirectHandler()
       opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))
       values = {'user_name': login, 'user_pass': password, 'login': 'Login'}
       data = urllib.parse.urlencode(values)
       binary_data = data.encode('utf-8')
       login = urllib.request.Request(url,binary_data,headers)
       login_response = opener.open(login)
       url2  = urlOpener.open('http://securityoverride.org/challenges/programmin/1/index.php')
       soup = BeautifulSoup(url2.read(), 'lxml')
       print soup.find_all('center')

Login()