(re)Captcha

import urllib2, urllib
API_SSL_SERVER="https://www.google.com/recaptcha/api"
API_SERVER="http://www.google.com/recaptcha/api"
VERIFY_SERVER="www.google.com"
"""
    BS:
    downloaded from:    http://pypi.python.org/pypi/recaptcha-client
    slightly modified see return from submit below
"""
class RecaptchaResponse(object):
    def __init__(self, is_valid, error_code=None):
        self.is_valid = is_valid
        self.error_code = error_code
def displayhtml (public_key,
                 use_ssl = False,
                 error = None):
    """Gets the HTML to display for reCAPTCHA
    public_key -- The public api key
    use_ssl -- Should the request be sent over ssl?
    error -- An error message to display (from RecaptchaResponse.error_code)"""
    error_param = ''
    if error:
        error_param = '&error=%s' % error
    if use_ssl:
        server = API_SSL_SERVER
    else:
        server = API_SERVER
    return """<script type="text/javascript" src="%(ApiServer)s/challenge?k=%(PublicKey)s%(ErrorParam)s"></script>
<noscript>
  <iframe src="%(ApiServer)s/noscript?k=%(PublicKey)s%(ErrorParam)s" height="300" width="500" frameborder="0"></iframe><br />
  <textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea>
  <input type='hidden' name='recaptcha_response_field' value='manual_challenge' />
</noscript>
""" % {
        'ApiServer' : server,
        'PublicKey' : public_key,
        'ErrorParam' : error_param,
        }

def submit (recaptcha_challenge_field,
            recaptcha_response_field,
            private_key,
            remoteip):
    """
    Submits a reCAPTCHA request for verification. Returns RecaptchaResponse
    for the request
    recaptcha_challenge_field -- The value of recaptcha_challenge_field from the form
    recaptcha_response_field -- The value of recaptcha_response_field from the form
    private_key -- your reCAPTCHA private key
    remoteip -- the user's ip address
    """
    if not (recaptcha_response_field and recaptcha_challenge_field and
            len (recaptcha_response_field) and len (recaptcha_challenge_field)):
        return RecaptchaResponse (is_valid = False, error_code = 'incorrect-captcha-sol')
    
    def encode_if_necessary(s):
        if isinstance(s, unicode):
            return s.encode('utf-8')
        return s
    params = urllib.urlencode ({
            'privatekey': encode_if_necessary(private_key),
            'remoteip' :  encode_if_necessary(remoteip),
            'challenge':  encode_if_necessary(recaptcha_challenge_field),
            'response' :  encode_if_necessary(recaptcha_response_field),
            })
    request = urllib2.Request (
        url = "http://%s/recaptcha/api/verify" % VERIFY_SERVER,
        data = params,
        headers = {
            "Content-type": "application/x-www-form-urlencoded",
            "User-agent": "reCAPTCHA Python"
            }
        )
    
    httpresp = urllib2.urlopen (request)
    return_values = httpresp.read ().splitlines ();
    httpresp.close();
    """
        BS: modified to simplify respons 
    """
    return return_values
    """
    return_code = return_values [0]
    if (return_code == "true"):
        return RecaptchaResponse (is_valid=True)
    else:
        return RecaptchaResponse (is_valid=False, error_code = return_values [1])
    """

#! /usr/bin/python
import cgi
import captcha
import cgitb; cgitb.enable()
"""
   Using unit capthca.py downloaded from: http://pypi.python.org/pypi/recaptcha-client
   Receive 2 values:
    challenge, response
   Accessed by AJAX
"""
"""
   key obtained from Captcha site, matching: www.it.hiof.no
"""
myPrivateKey='<hemmelig>'
"""
Using http://www.selfseo.com/find_ip_address_of_a_website.php
   with 
www.it.hiof.no
   giving:
"""
IPAddress='158.39.165.7'
form=cgi.FieldStorage()
print 'Content-type: text/plain; charset=utf-8\n\n'
challenge=''
response=''
try:
   challenge=form['challenge'].value
   response=form['response'].value
   result= captcha.submit(challenge,response,myPrivateKey,IPAddress)
   print result[0]+'\n'+result[1]
except:
   print 'failed'