Use Python to login to a secured website

This Python 2 class logs in and connect to a secured website. The class inherit from thread so that it is possible to run multiple instance of the class.

class CRReader(threading.Thread):

data = None

headers = None

def __init__(self, crNo, semaphore):

threading.Thread.__init__(self, name=crNo)

self.loggedin = False self.crNo = crNo self.semaphore = semaphore

self.opener = None

self.status = None

def login(self):

if self.loggedin is False:

#print 'Login ' + self.crNo

url = "https://example.com/login.php"

opts = {

'username': 'John',

'password': 'pass1',

}

CRReader.headers = {

'User-Agent': 'Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12',

'Accept': 'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5',

'Accept-Language': 'en-gb,en;q=0.5',

'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',

'Connection': 'keep-alive'

}

CRReader.data = urllib.urlencode(opts)

request = urllib2.Request(url, CRReader.data, CRReader.headers)

cookies = cookielib.CookieJar()

response = urllib2.urlopen(url)

cookies.extract_cookies(response, request)

cookie_handler = urllib2.HTTPCookieProcessor(cookies)

redirect_handler = urllib2.HTTPRedirectHandler()

self.opener = urllib2.build_opener(redirect_handler, cookie_handler)

response = self.opener.open(request)

self.loggedin = True

return self.opener