osqa/forum_modules/recaptcha/formfield.py

   1 from django import forms
   2 from lib import captcha
   3 from django.utils.safestring import mark_safe
   4 from django.utils.encoding import force_unicode, smart_unicode
   5 from django.utils.translation import ugettext_lazy as _
   6 import settings
   7
   8 class ReCaptchaField(forms.Field):
   9     def __init__(self, *args, **kwargs):
  10         super(ReCaptchaField, self).__init__(widget=ReCaptchaWidget)
  11
  12     def clean(self, values):
  13         super(ReCaptchaField, self).clean(values[1])
  14         recaptcha_challenge_value = smart_unicode(values[0])
  15         recaptcha_response_value = smart_unicode(values[1])
  16         check_captcha = captcha.submit(recaptcha_challenge_value,
  17             recaptcha_response_value, settings.RECAPTCHA_PRIV_KEY, {})
  18
  19         if not check_captcha.is_valid:
  20             raise forms.util.ValidationError(_('Invalid captcha'))
  21
  22         return values[0]
  23
  24
  25 class ReCaptchaWidget(forms.Widget):
  26     def render(self, name, value, attrs=None):
  27         return mark_safe(force_unicode(captcha.displayhtml(settings.RECAPTCHA_PUB_KEY)))
  28
  29     def value_from_datadict(self, data, files, name):
  30         return (data.get('recaptcha_challenge_field', None), data.get('recaptcha_response_field', None))
  31
  32