minor fixes and test

captcha/backends/base.py

@@ -1,9 +1,11 @@
 from captcha.conf import settings as captcha_settings
 
+
 class DoesNotExist(Exception):
     """ Can't find captcha in store """
     pass
 
+
 class BaseStore(object):
     DoesNotExist = DoesNotExist
 
@@ -12,14 +14,14 @@ def generate_key(self):
         Generate captcha with unique key
         """
         return captcha_settings.get_challenge()()
-        
+
     def remove_expired(self):
         """
         Remove expired captcha records
         """
         pass
 
-    def get(self, response=None, hashkey=None, allow_expired = True):
+    def get(self, response=None, hashkey=None, allow_expired=True):
         """
         Get captcha from store, or rise exception if captcha wasn't found
         """

captcha/backends/db.py

@@ -1,13 +1,13 @@
-from captcha.conf import settings as captcha_settings
 from ..models import CaptchaStore, get_safe_now
 from .base import BaseStore
 
+
 class DBStore(BaseStore):
-    def __init__(self, key = None):
+    def __init__(self, key=None):
         self._captcha = {}
         if key:
             try:
-                cap = CaptchaStore.objects.get(hashkey = key)
+                cap = CaptchaStore.objects.get(hashkey=key)
                 self._captcha = {
                     'hashkey': cap.hashkey,
                     'challenge': cap.challenge,
@@ -16,23 +16,23 @@ def __init__(self, key = None):
                 }
             except CaptchaStore.DoesNotExist:
                 raise self.DoesNotExist
-        
+
     def __getitem__(self, key):
         return self._captcha[key]
-        
+
     def remove_expired(self):
         CaptchaStore.objects.filter(expiration__lte=get_safe_now()).delete()
 
     def generate_key(self):
         return CaptchaStore.generate_key()
 
-    def get(self, response=None, hashkey=None, allow_expired = True):
+    def get(self, response=None, hashkey=None, allow_expired=True):
         store = DBStore(hashkey)
         if response and store['response'] != response:
             raise self.DoesNotExist
         if not allow_expired and store['expiration'] < get_safe_now():
             raise self.DoesNotExist
         return store
-        
+
     def delete(self):
-        CaptchaStore.objects.filter(hashkey = self['hashkey']).delete()
+        CaptchaStore.objects.filter(hashkey=self['hashkey']).delete()

captcha/backends/session.py

@@ -1,27 +1,35 @@
 from .base import BaseStore
 from captcha.conf import settings as captcha_settings
 from django.conf import settings
-from importlib import import_module
-Store = import_module(settings.SESSION_ENGINE).SessionStore
 import django
-
+try:
+    from importlib import import_module
+    Store = import_module(settings.SESSION_ENGINE).SessionStore
+except:
+    # py 2.6
+    backend = __import__(settings.SESSION_ENGINE, globals(), locals(), ['SessionStore'], -1)
+    Store = backend.SessionStore
+
+
 class SessionStore(BaseStore):
 
     def generate_key(self):
         challenge, response = super(SessionStore, self).generate_key()
         store = Store()
         store.set_expiry(60 * int(captcha_settings.CAPTCHA_TIMEOUT))
-        store['challenge']=challenge
-        store['response']=response
+        store['challenge'] = challenge
+        store['response'] = response
         store.save()
         return store.session_key
-        
+
     def remove_expired(self):
         if not django.get_version() < '1.5':
             Store.clear_expired()
 
-    def get(self, response=None, hashkey=None, allow_expired = True):
+    def get(self, response=None, hashkey=None, allow_expired=True):
         s = Store(session_key=hashkey)
+        if not s.get('response'):
+            raise self.DoesNotExist
         if response:
             if s['response'] != response:
                 raise self.DoesNotExist

captcha/fields.py

@@ -8,16 +8,6 @@
 from six import u
 from .backends.base import BaseStore
 
-CaptchaStore = None
-if settings.CAPTCHA_STORE == 'SESSION':
-    from .backends.session import SessionStore
-    CaptchaStore = SessionStore()
-elif settings.CAPTCHA_STORE == 'DB':
-    from .backends.db import DBStore
-    CaptchaStore = DBStore()
-else:
-    raise ImproperlyConfigured
-
 
 class BaseCaptchaTextInput(MultiWidget):
     """
@@ -40,6 +30,17 @@ def fetch_captcha_store(self, name, value, attrs=None):
         Fetches a new CaptchaStore
         This has to be called inside render
         """
+
+        CaptchaStore = None
+        if settings.CAPTCHA_STORE == 'SESSION':
+            from .backends.session import SessionStore
+            CaptchaStore = SessionStore()
+        elif settings.CAPTCHA_STORE == 'DB':
+            from .backends.db import DBStore
+            CaptchaStore = DBStore()
+        else:
+            raise ImproperlyConfigured
+
         try:
             reverse('captcha-image', args=('dummy',))
         except NoReverseMatch:
@@ -135,6 +136,16 @@ def compress(self, data_list):
         return None
 
     def clean(self, value):
+        CaptchaStore = None
+        if settings.CAPTCHA_STORE == 'SESSION':
+            from .backends.session import SessionStore
+            CaptchaStore = SessionStore()
+        elif settings.CAPTCHA_STORE == 'DB':
+            from .backends.db import DBStore
+            CaptchaStore = DBStore()
+        else:
+            raise ImproperlyConfigured
+
         super(CaptchaField, self).clean(value)
         response, value[1] = (value[1] or '').strip().lower(), ''
         CaptchaStore.remove_expired()
@@ -150,7 +161,7 @@ def clean(self, value):
             pass
         else:
             try:
-                CaptchaStore.get(response=response, hashkey=value[0], allow_expired = False).delete()
+                CaptchaStore.get(response=response, hashkey=value[0], allow_expired=False).delete()
             except BaseStore.DoesNotExist:
                 raise ValidationError(getattr(self, 'error_messages', {}).get('invalid', ugettext_lazy('Invalid CAPTCHA')))
         return value

captcha/tests/tests.py

@@ -2,11 +2,14 @@
 from captcha.conf import settings
 from captcha.fields import CaptchaField, CaptchaTextInput
 from captcha.models import CaptchaStore, get_safe_now
+from captcha.backends.db import DBStore
+from captcha.backends.session import SessionStore
 from django.conf import settings as django_settings
 from django.core.exceptions import ImproperlyConfigured
 from django.core.urlresolvers import reverse
 from django.test import TestCase
 from django.utils.translation import ugettext_lazy
+import django
 import datetime
 import json
 import re
@@ -29,7 +32,6 @@ class CaptchaCase(TestCase):
     urls = 'captcha.tests.urls'
 
     def setUp(self):
-
         self.stores = {}
         self.__current_settings_output_format = settings.CAPTCHA_OUTPUT_FORMAT
         self.__current_settings_dictionary = settings.CAPTCHA_WORDS_DICTIONARY
@@ -332,5 +334,100 @@ def test_image_size(self):
         settings.CAPTCHA_IMAGE_SIZE = __current_test_mode_setting
 
 
+class StoresCase(TestCase):
+    urls = 'captcha.tests.urls'
+
+    # store tests
+    def test_db_store(self):
+        store = DBStore()
+        key = store.generate_key()
+        record = store.get(hashkey=key)
+        self.assertEqual(record['hashkey'], key)
+        self.assertNotEqual(record._captcha.get('challenge'), None)
+        self.assertNotEqual(record._captcha.get('response'), None)
+        record.delete()
+        try:
+            store.get(hashkey=key)
+            self.fail('Record deletion error')
+        except:
+            pass
+
+        key = store.generate_key()
+        cap = CaptchaStore.objects.get(hashkey=key)
+        cap.expiration = get_safe_now() - datetime.timedelta(minutes=1)
+        cap.save()
+        try:
+            store.get(hashkey=key, allow_expired=False)
+            self.fail()
+        except:
+            pass
+
+        store.remove_expired()
+        try:
+            store.get(hashkey=key)
+            self.fail('remove_expired failed')
+        except:
+            pass
+
+    def test_session_store(self):
+        store = SessionStore()
+        key = store.generate_key()
+        record = store.get(hashkey=key)
+        self.assertEqual(record.session_key, key)
+        self.assertNotEqual(record.get('challenge'), None)
+        self.assertNotEqual(record.get('response'), None)
+        record.delete()
+        try:
+            store.get(hashkey=key)
+            self.fail('Record deletion error')
+        except:
+            pass
+
+        key = store.generate_key()
+        cap = store.get(hashkey=key)
+        cap.set_expiry(-1 * 60)
+        cap.save()
+        try:
+            store.get(hashkey=key, allow_expired=False)
+            self.fail()
+        except:
+            pass
+
+        if not django.get_version() < '1.5':
+            # django lower than 1.5 can't remove expired sessions
+            store.remove_expired()
+            try:
+                store.get(hashkey=key)
+                self.fail('remove_expired failed')
+            except:
+                pass
+
+    # view tests
+    def testFormSubmit(self):
+        settings.CAPTCHA_STORE = 'SESSION'
+        r = self.client.get(reverse('captcha-test'))
+        self.assertEqual(r.status_code, 200)
+
+        store = SessionStore()
+        hash_ = re.findall(r'value="([0-9a-z]+)"', str(r.content))[0]
+        response = store.get(hashkey=hash_)['response']
+
+        r = self.client.post(reverse('captcha-test'), dict(captcha_0=hash_, captcha_1=response, subject='xxx', sender='[email protected]'))
+        self.assertEqual(r.status_code, 200)
+        self.assertTrue(str(r.content).find('Form validated') > 0)
+
+        r = self.client.post(reverse('captcha-test'), dict(captcha_0=hash_, captcha_1=response, subject='xxx', sender='[email protected]'))
+        self.assertEqual(r.status_code, 200)
+        self.assertFalse(str(r.content).find('Form validated') > 0)
+
+    def testWrongSubmit(self):
+        settings.CAPTCHA_STORE = 'SESSION'
+        for urlname in ('captcha-test', 'captcha-test-model-form'):
+            r = self.client.get(reverse(urlname))
+            self.assertEqual(r.status_code, 200)
+            r = self.client.post(reverse(urlname), dict(captcha_0='abc', captcha_1='wrong response', subject='xxx', sender='[email protected]'))
+            self.assertFormError(r, 'form', 'captcha', ugettext_lazy('Invalid CAPTCHA'))
+
+
 def trivial_challenge():
     return 'trivial', 'trivial'

captcha/views.py

@@ -1,6 +1,7 @@
 from captcha.conf import settings
 from captcha.helpers import captcha_image_url
 from django.http import HttpResponse, Http404
+from django.core.exceptions import ImproperlyConfigured
 import random
 import re
 import tempfile
@@ -40,6 +41,7 @@
 else:
     raise ImproperlyConfigured
 
+
 def getsize(font, text):
     if hasattr(font, 'getoffset'):
         return [x + y for x, y in zip(font.getsize(text), font.getoffset(text))]

testproject/settings.py

@@ -33,7 +33,7 @@
     'captcha',
 ]
 
-LANGUAGE_CODE = "en"
+LANGUAGE_CODE = "en-us"
 
 LANGUAGES = (
     ('en', 'English'),