/usr/lib/python2.7/dist-packages/captcha/fields.py is in python-django-captcha 0.5.6-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 | from captcha.conf import settings
from captcha.models import CaptchaStore
import django
from django.core.exceptions import ImproperlyConfigured
if django.VERSION < (1, 10): # NOQA
from django.core.urlresolvers import reverse, NoReverseMatch # NOQA
else: # NOQA
from django.urls import reverse, NoReverseMatch # NOQA
from django.forms import ValidationError
from django.forms.fields import CharField, MultiValueField
from django.forms.widgets import TextInput, MultiWidget, HiddenInput
from django.utils.translation import ugettext_lazy
from django.utils import timezone
from django.template.loader import render_to_string
from django.utils.safestring import mark_safe
from six import u
class BaseCaptchaTextInput(MultiWidget):
"""
Base class for Captcha widgets
"""
def __init__(self, attrs=None):
widgets = (
HiddenInput(attrs),
TextInput(attrs),
)
super(BaseCaptchaTextInput, self).__init__(widgets, attrs)
def decompress(self, value):
if value:
return value.split(',')
return [None, None]
def fetch_captcha_store(self, name, value, attrs=None, generator=None):
"""
Fetches a new CaptchaStore
This has to be called inside render
"""
try:
reverse('captcha-image', args=('dummy',))
except NoReverseMatch:
raise ImproperlyConfigured('Make sure you\'ve included captcha.urls as explained in the INSTALLATION section on http://readthedocs.org/docs/django-simple-captcha/en/latest/usage.html#installation')
if settings.CAPTCHA_GET_FROM_POOL:
key = CaptchaStore.pick()
else:
key = CaptchaStore.generate_key(generator)
# these can be used by format_output and render
self._value = [key, u('')]
self._key = key
self.id_ = self.build_attrs(attrs).get('id', None)
def id_for_label(self, id_):
if id_:
return id_ + '_1'
return id_
def image_url(self):
return reverse('captcha-image', kwargs={'key': self._key})
def audio_url(self):
return reverse('captcha-audio', kwargs={'key': self._key}) if settings.CAPTCHA_FLITE_PATH else None
def refresh_url(self):
return reverse('captcha-refresh')
class CaptchaTextInput(BaseCaptchaTextInput):
def __init__(self, attrs=None, **kwargs):
self._args = kwargs
self._args['output_format'] = self._args.get('output_format') or settings.CAPTCHA_OUTPUT_FORMAT
self._args['field_template'] = self._args.get('field_template') or settings.CAPTCHA_FIELD_TEMPLATE
# self._args['id_prefix'] = self._args.get('id_prefix')
if self._args['output_format'] is None and self._args['field_template'] is None:
raise ImproperlyConfigured('You MUST define either CAPTCHA_FIELD_TEMPLATE or CAPTCHA_OUTPUT_FORMAT setting. Please refer to http://readthedocs.org/docs/django-simple-captcha/en/latest/usage.html#installation')
if self._args['output_format']:
for key in ('image', 'hidden_field', 'text_field'):
if '%%(%s)s' % key not in self._args['output_format']:
raise ImproperlyConfigured('All of %s must be present in your CAPTCHA_OUTPUT_FORMAT setting. Could not find %s' % (
', '.join(['%%(%s)s' % k for k in ('image', 'hidden_field', 'text_field')]),
'%%(%s)s' % key
))
super(CaptchaTextInput, self).__init__(attrs)
def build_attrs(self, *args, **kwargs):
ret = super(CaptchaTextInput, self).build_attrs(*args, **kwargs)
if self._args.get('id_prefix') and 'id' in ret:
ret['id'] = '%s_%s' % (self._args.get('id_prefix'), ret['id'])
return ret
def id_for_label(self, id_):
ret = super(CaptchaTextInput, self).id_for_label(id_)
if self._args.get('id_prefix') and 'id' in ret:
ret = '%s_%s' % (self._args.get('id_prefix'), ret)
return ret
def format_output(self, rendered_widgets):
# hidden_field, text_field = rendered_widgets
if self._args['output_format']:
ret = self._args['output_format'] % {
'image': self.image_and_audio,
'hidden_field': self.hidden_field,
'text_field': self.text_field
}
return ret
elif self._args['field_template']:
context = {
'image': mark_safe(self.image_and_audio),
'hidden_field': mark_safe(self.hidden_field),
'text_field': mark_safe(self.text_field)
}
return render_to_string(settings.CAPTCHA_FIELD_TEMPLATE, context)
def render(self, name, value, attrs=None, renderer=None):
self.fetch_captcha_store(name, value, attrs, self._args.get('generator'))
context = {
'image': self.image_url(),
'name': name,
'key': self._key,
'id': u'%s_%s' % (self._args.get('id_prefix'), attrs.get('id')) if self._args.get('id_prefix') else attrs.get('id')
}
if settings.CAPTCHA_FLITE_PATH:
context.update({'audio': self.audio_url()})
self.image_and_audio = render_to_string(settings.CAPTCHA_IMAGE_TEMPLATE, context)
self.hidden_field = render_to_string(settings.CAPTCHA_HIDDEN_FIELD_TEMPLATE, context)
self.text_field = render_to_string(settings.CAPTCHA_TEXT_FIELD_TEMPLATE, context)
extra_kwargs = {}
if django.VERSION >= (1, 11):
# https://docs.djangoproject.com/en/1.11/ref/forms/widgets/#django.forms.Widget.render
extra_kwargs['renderer'] = renderer
return super(CaptchaTextInput, self).render(name, self._value, attrs=attrs, **extra_kwargs)
def _render(self, template_name, context, renderer=None):
return self.format_output(None)
class CaptchaField(MultiValueField):
def __init__(self, *args, **kwargs):
fields = (
CharField(show_hidden_initial=True),
CharField(),
)
if 'error_messages' not in kwargs or 'invalid' not in kwargs.get('error_messages'):
if 'error_messages' not in kwargs:
kwargs['error_messages'] = {}
kwargs['error_messages'].update({'invalid': ugettext_lazy('Invalid CAPTCHA')})
kwargs['widget'] = kwargs.pop('widget', CaptchaTextInput(
output_format=kwargs.pop('output_format', None),
id_prefix=kwargs.pop('id_prefix', None),
generator=kwargs.pop('generator', None)
))
super(CaptchaField, self).__init__(fields, *args, **kwargs)
def compress(self, data_list):
if data_list:
return ','.join(data_list)
return None
def clean(self, value):
super(CaptchaField, self).clean(value)
response, value[1] = (value[1] or '').strip().lower(), ''
if not settings.CAPTCHA_GET_FROM_POOL:
CaptchaStore.remove_expired()
if settings.CAPTCHA_TEST_MODE and response.lower() == 'passed':
# automatically pass the test
try:
# try to delete the captcha based on its hash
CaptchaStore.objects.get(hashkey=value[0]).delete()
except CaptchaStore.DoesNotExist:
# ignore errors
pass
elif not self.required and not response:
pass
else:
try:
CaptchaStore.objects.get(response=response, hashkey=value[0], expiration__gt=timezone.now()).delete()
except CaptchaStore.DoesNotExist:
raise ValidationError(getattr(self, 'error_messages', {}).get('invalid', ugettext_lazy('Invalid CAPTCHA')))
return value
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