#!/volume1/@appstore/Python/usr/local/bin/python

import urllib
import urllib2
import cookielib
import getopt
import sys
import logging

def getRandHTMLResponse(response):
    target = "<form id=\'login"
    targetresponse = "<div id=\'loginbox\'"

    response = response[response.find(targetresponse):len(response)]
    return response[response.find(target)+len(target):response.find(target)+len(target):response.find(target)+len(target)+4]

def getHiddenRandHTMLResponse(response):
    target = "<input type=\'hidden\' name=\'multiform\' value=\'"
    targetresponse = "<div id=\'loginbox\'"
    parsedres = response[response.find(targetresponse):len(response)]
    return parsedres[parsedres.find(target)+len(target):parsedres.find(target)+len(target)+34]

def checkLogin(response):
    target = "<title>My Dyn Account</title>"
    if response.find(target) == -1:
        return False
    return True

def usage():
    print "usage: ./dyndnsAutoLogin [options]"
    print ""
    print "options:"
    print "-h, --help 	 show this help message and exit"
    print "-u, --username   set your DynDns login_username"
    print "-p, --password   set your DynDns login_password"
    print ""
    print "example:"
    print "./dyndnsAutoLogin -u username -p password"

class HTMLSession:
    cj = None
    opener = None
    txHeaders = None

    def __init__(self, txHeaders):
        #The CookieJar will hold any cookies necessary throughout the login process.
        self.cj = cookielib.MozillaCookieJar()
        self.txHeaders = txHeaders
        self.opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(self.cj))
        urllib2.install_opener(self.opener)

    def setHeaders(self, txheaders):
        self.txHeaders = txHeaders

    def getHeaders(self):
        return self.txHeaders

    def openURI(self, uri, txdata):
        try:
            req = urllib2.Request(uri, txdata, self.txHeaders)
            # create a request object

            handle = urllib2.urlopen(req)
            # and open it to return a handle on the url

        except IOError as e:
            print 'we failed to open "%s".' % uri

            if hasattr(e, 'code'):
                print 'We failed with error code - %s.' % e.code
                logging.error('We failed with error code - %s.' % e.code)
            elif hasattr(e, 'reason'):
                print "The error object has the following 'reason' attribute :"
                print e.reason
                print "This usually means the server doesn't exist,'"
                print "is down, or we don't have an internet connection."
                return None
        else:
            return handle.read()

def main(argv):
    username = ""
    password = ""
    logfile = "/var/dyndnsAutoLogin.log"
    hiddenval = ""
    theurl = "https://account.dyn.com/entrance/"
    thelogouturl = "https://account.dyn.com/entrance/?__logout=1"
    txdata = None
    txheaders =  {'User-agent' : 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)'}
    # fake a user agent, some websites (like google) don't like automated exploration
    logging.basicConfig(filename=logfile,level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s', datefmt='%Y%m%d %H:%M:%S')

    try:
        opts, args = getopt.getopt(argv, "hu:p:", ["help", "username=","password="])
    except getopt.GetoptError:
        usage()
        logging.warning('Manual login with incorrect parameters')
        exit(2)
    for opt, arg in opts:
        if opt in ("-h", "--help"):
            usage()
            exit(2)
        elif opt in ("-u", "--username"):
            username = arg
        elif opt in ("-p", "--password"):
            password = arg

    myhtmlsession = HTMLSession(txheaders)
    response = myhtmlsession.openURI(theurl, None)

    if response == None:
        sys.exit(0)

    hiddenval = getHiddenRandHTMLResponse(response)
    txdata = urllib.urlencode({'username':username, 'password':password, 'multiform':hiddenval, 'submit': "Log in"})

    response = myhtmlsession.openURI(theurl, txdata)
    if response == None:
        sys.exit(0)

    #we should sleep here for about 10 seconds.
    if checkLogin(response):
        print 'Die Anmeldung am DynDNS war erfolgreich.'
        logging.info('Die Anmeldung am DynDNS war erfolgreich.')
    else:
        print 'Login fehlerhaft. Bitte DynDNS Kennung pruefen.'
        logging.info('Login fehlerhaft. Bitte DynDNS Kennung pruefen.')

    response = myhtmlsession.openURI(thelogouturl, None)
    if response == None:
        sys.exit(0)

if __name__ == "__main__":
    main(sys.argv[1:])