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91 lines
2.9 KiB
Python
91 lines
2.9 KiB
Python
#
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# Basic field and widget for simple recaptcha support using
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# the v2 APIs.
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#
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from django import forms
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from django.forms import ValidationError
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from django.utils.safestring import mark_safe
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from django.conf import settings
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import httplib
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import urllib
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import json
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import logging
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log = logging.getLogger(__name__)
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class ReCaptchaWidget(forms.widgets.Widget):
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def render(self, name, value, attrs=None):
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if settings.NOCAPTCHA:
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return u'Captcha disabled on this system'
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log.info("Generated captcha")
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return mark_safe(u'<div class="g-recaptcha" data-sitekey="{0}"></div>'.format(settings.RECAPTCHA_SITE_KEY))
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def value_from_datadict(self, data, files, name):
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if settings.NOCAPTCHA:
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return None
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return data.get('g-recaptcha-response', None)
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class ReCaptchaField(forms.CharField):
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def __init__(self, *args, **kwargs):
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self.remoteip = None
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self.widget = ReCaptchaWidget()
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self.required = not settings.NOCAPTCHA
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super(ReCaptchaField, self).__init__(*args, **kwargs)
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def set_ip(self, ip):
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self.remoteip = ip
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def clean(self, value):
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if settings.NOCAPTCHA:
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return True
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super(ReCaptchaField, self).clean(value)
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# Validate the recaptcha
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c = httplib.HTTPSConnection('www.google.com', strict=True, timeout=5)
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param = {
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'secret': settings.RECAPTCHA_SECRET_KEY,
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'response': value,
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}
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# Temporarily don't include remoteip, because it only shows our ssl terminating
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# frontends.
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# if self.remoteip:
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# param['remoteip'] = self.remoteip
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try:
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c.request('POST', '/recaptcha/api/siteverify', urllib.urlencode(param), {
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'Content-type': 'application/x-www-form-urlencoded',
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})
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c.sock.settimeout(10)
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except Exception, e:
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# Error to connect at TCP level
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log.error('Failed to connect to google recaptcha API: %s' % e)
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raise ValidationError('Failed in API call to google recaptcha')
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try:
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r = c.getresponse()
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except:
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log.error('Failed in API call to google recaptcha')
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raise ValidationError('Failed in API call to google recaptcha')
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if r.status != 200:
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log.error('Invalid response code from google recaptcha')
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raise ValidationError('Invalid response code from google recaptcha')
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try:
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j = json.loads(r.read())
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except:
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log.error('Invalid response structure from google recaptcha')
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raise ValidationError('Invalid response structure from google recaptcha')
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if not j['success']:
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log.warning('Incorrect recaptcha entered. Trying again.')
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raise ValidationError('Invalid. Try again.')
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# Recaptcha validated ok!
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log.info("Successful recaptcha validation")
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return True
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