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# -*- coding: utf-8 -*-
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import urllib
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import urllib2
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API_SSL_SERVER = "https://www.google.com/recaptcha/api"
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API_SERVER = "http://www.google.com/recaptcha/api"
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VERIFY_SERVER = "www.google.com"
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class RecaptchaResponse(object):
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def __init__(self, is_valid, error_code=None):
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self.is_valid = is_valid
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self.error_code = error_code
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def __repr__(self):
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return '<RecaptchaResponse:%s>' % (self.is_valid)
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def displayhtml(public_key, use_ssl=False, error=None):
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"""Gets the HTML to display for reCAPTCHA
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public_key -- The public api key
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use_ssl -- Should the request be sent over ssl?
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error -- An error message to display (from RecaptchaResponse.error_code)"""
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error_param = ''
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if error:
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error_param = '&error=%s' % error
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if use_ssl:
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server = API_SSL_SERVER
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else:
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server = API_SERVER
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return """<script type="text/javascript" src="%(ApiServer)s/challenge?k=%(PublicKey)s%(ErrorParam)s"></script>
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<noscript>
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<iframe src="%(ApiServer)s/noscript?k=%(PublicKey)s%(ErrorParam)s" height="300" width="500" frameborder="0"></iframe><br />
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<textarea name="recaptcha_challenge_field" rows="3" cols="40"></textarea>
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<input type='hidden' name='recaptcha_response_field' value='manual_challenge' />
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</noscript>
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""" % {
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'ApiServer': server,
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'PublicKey': public_key,
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'ErrorParam': error_param,
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}
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def submit(recaptcha_challenge_field, recaptcha_response_field, private_key,
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remoteip):
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"""
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Submits a reCAPTCHA request for verification. Returns RecaptchaResponse
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for the request
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recaptcha_challenge_field -- The value of recaptcha_challenge_field from the form
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recaptcha_response_field -- The value of recaptcha_response_field from the form
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private_key -- your reCAPTCHA private key
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remoteip -- the user's ip address
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"""
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if not (recaptcha_response_field and recaptcha_challenge_field and
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len(recaptcha_response_field) and len(
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recaptcha_challenge_field)):
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return RecaptchaResponse(is_valid=False,
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error_code='incorrect-captcha-sol')
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def encode_if_necessary(s):
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if isinstance(s, unicode):
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return s.encode('utf-8')
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return s
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params = urllib.urlencode({
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'privatekey': encode_if_necessary(private_key),
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'remoteip': encode_if_necessary(remoteip),
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'challenge': encode_if_necessary(recaptcha_challenge_field),
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'response': encode_if_necessary(recaptcha_response_field),
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})
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request = urllib2.Request(
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url="http://%s/recaptcha/api/verify" % VERIFY_SERVER,
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data=params,
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headers={
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"Content-type": "application/x-www-form-urlencoded",
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"User-agent": "reCAPTCHA Python"
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}
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)
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httpresp = urllib2.urlopen(request)
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return_values = httpresp.read().splitlines()
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httpresp.close()
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return_code = return_values[0]
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if return_code == "true":
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return RecaptchaResponse(is_valid=True)
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else:
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return RecaptchaResponse(is_valid=False, error_code=return_values[1])
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