1 files changed, 0 insertions, 327 deletions
diff --git a/lib/python2.7/site-packages/django/contrib/sessions/backends/base.py b/lib/python2.7/site-packages/django/contrib/sessions/backends/base.py
deleted file mode 100644
index 7f5e958..0000000
--- a/lib/python2.7/site-packages/django/contrib/sessions/backends/base.py
+++ /dev/null
@@ -1,327 +0,0 @@
-from __future__ import unicode_literals
-
-import base64
-from datetime import datetime, timedelta
-import logging
-import string
-
-from django.conf import settings
-from django.core.exceptions import SuspiciousOperation
-from django.utils.crypto import constant_time_compare
-from django.utils.crypto import get_random_string
-from django.utils.crypto import salted_hmac
-from django.utils import timezone
-from django.utils.encoding import force_bytes, force_text
-from django.utils.module_loading import import_by_path
-
-from django.contrib.sessions.exceptions import SuspiciousSession
-
-# session_key should not be case sensitive because some backends can store it
-# on case insensitive file systems.
-VALID_KEY_CHARS = string.ascii_lowercase + string.digits
-
-class CreateError(Exception):
-    """
-    Used internally as a consistent exception type to catch from save (see the
-    docstring for SessionBase.save() for details).
-    """
-    pass
-
-class SessionBase(object):
-    """
-    Base class for all Session classes.
-    """
-    TEST_COOKIE_NAME = 'testcookie'
-    TEST_COOKIE_VALUE = 'worked'
-
-    def __init__(self, session_key=None):
-        self._session_key = session_key
-        self.accessed = False
-        self.modified = False
-        self.serializer = import_by_path(settings.SESSION_SERIALIZER)
-
-    def __contains__(self, key):
-        return key in self._session
-
-    def __getitem__(self, key):
-        return self._session[key]
-
-    def __setitem__(self, key, value):
-        self._session[key] = value
-        self.modified = True
-
-    def __delitem__(self, key):
-        del self._session[key]
-        self.modified = True
-
-    def get(self, key, default=None):
-        return self._session.get(key, default)
-
-    def pop(self, key, *args):
-        self.modified = self.modified or key in self._session
-        return self._session.pop(key, *args)
-
-    def setdefault(self, key, value):
-        if key in self._session:
-            return self._session[key]
-        else:
-            self.modified = True
-            self._session[key] = value
-            return value
-
-    def set_test_cookie(self):
-        self[self.TEST_COOKIE_NAME] = self.TEST_COOKIE_VALUE
-
-    def test_cookie_worked(self):
-        return self.get(self.TEST_COOKIE_NAME) == self.TEST_COOKIE_VALUE
-
-    def delete_test_cookie(self):
-        del self[self.TEST_COOKIE_NAME]
-
-    def _hash(self, value):
-        key_salt = "django.contrib.sessions" + self.__class__.__name__
-        return salted_hmac(key_salt, value).hexdigest()
-
-    def encode(self, session_dict):
-        "Returns the given session dictionary serialized and encoded as a string."
-        serialized = self.serializer().dumps(session_dict)
-        hash = self._hash(serialized)
-        return base64.b64encode(hash.encode() + b":" + serialized).decode('ascii')
-
-    def decode(self, session_data):
-        encoded_data = base64.b64decode(force_bytes(session_data))
-        try:
-            # could produce ValueError if there is no ':'
-            hash, serialized = encoded_data.split(b':', 1)
-            expected_hash = self._hash(serialized)
-            if not constant_time_compare(hash.decode(), expected_hash):
-                raise SuspiciousSession("Session data corrupted")
-            else:
-                return self.serializer().loads(serialized)
-        except Exception as e:
-            # ValueError, SuspiciousOperation, unpickling exceptions. If any of
-            # these happen, just return an empty dictionary (an empty session).
-            if isinstance(e, SuspiciousOperation):
-                logger = logging.getLogger('django.security.%s' %
-                        e.__class__.__name__)
-                logger.warning(force_text(e))
-            return {}
-
-    def update(self, dict_):
-        self._session.update(dict_)
-        self.modified = True
-
-    def has_key(self, key):
-        return key in self._session
-
-    def keys(self):
-        return self._session.keys()
-
-    def values(self):
-        return self._session.values()
-
-    def items(self):
-        return self._session.items()
-
-    def iterkeys(self):
-        return self._session.iterkeys()
-
-    def itervalues(self):
-        return self._session.itervalues()
-
-    def iteritems(self):
-        return self._session.iteritems()
-
-    def clear(self):
-        # To avoid unnecessary persistent storage accesses, we set up the
-        # internals directly (loading data wastes time, since we are going to
-        # set it to an empty dict anyway).
-        self._session_cache = {}
-        self.accessed = True
-        self.modified = True
-
-    def _get_new_session_key(self):
-        "Returns session key that isn't being used."
-        while True:
-            session_key = get_random_string(32, VALID_KEY_CHARS)
-            if not self.exists(session_key):
-                break
-        return session_key
-
-    def _get_or_create_session_key(self):
-        if self._session_key is None:
-            self._session_key = self._get_new_session_key()
-        return self._session_key
-
-    def _get_session_key(self):
-        return self._session_key
-
-    session_key = property(_get_session_key)
-
-    def _get_session(self, no_load=False):
-        """
-        Lazily loads session from storage (unless "no_load" is True, when only
-        an empty dict is stored) and stores it in the current instance.
-        """
-        self.accessed = True
-        try:
-            return self._session_cache
-        except AttributeError:
-            if self.session_key is None or no_load:
-                self._session_cache = {}
-            else:
-                self._session_cache = self.load()
-        return self._session_cache
-
-    _session = property(_get_session)
-
-    def get_expiry_age(self, **kwargs):
-        """Get the number of seconds until the session expires.
-
-        Optionally, this function accepts `modification` and `expiry` keyword
-        arguments specifying the modification and expiry of the session.
-        """
-        try:
-            modification = kwargs['modification']
-        except KeyError:
-            modification = timezone.now()
-        # Make the difference between "expiry=None passed in kwargs" and
-        # "expiry not passed in kwargs", in order to guarantee not to trigger
-        # self.load() when expiry is provided.
-        try:
-            expiry = kwargs['expiry']
-        except KeyError:
-            expiry = self.get('_session_expiry')
-
-        if not expiry:   # Checks both None and 0 cases
-            return settings.SESSION_COOKIE_AGE
-        if not isinstance(expiry, datetime):
-            return expiry
-        delta = expiry - modification
-        return delta.days * 86400 + delta.seconds
-
-    def get_expiry_date(self, **kwargs):
-        """Get session the expiry date (as a datetime object).
-
-        Optionally, this function accepts `modification` and `expiry` keyword
-        arguments specifying the modification and expiry of the session.
-        """
-        try:
-            modification = kwargs['modification']
-        except KeyError:
-            modification = timezone.now()
-        # Same comment as in get_expiry_age
-        try:
-            expiry = kwargs['expiry']
-        except KeyError:
-            expiry = self.get('_session_expiry')
-
-        if isinstance(expiry, datetime):
-            return expiry
-        if not expiry:   # Checks both None and 0 cases
-            expiry = settings.SESSION_COOKIE_AGE
-        return modification + timedelta(seconds=expiry)
-
-    def set_expiry(self, value):
-        """
-        Sets a custom expiration for the session. ``value`` can be an integer,
-        a Python ``datetime`` or ``timedelta`` object or ``None``.
-
-        If ``value`` is an integer, the session will expire after that many
-        seconds of inactivity. If set to ``0`` then the session will expire on
-        browser close.
-
-        If ``value`` is a ``datetime`` or ``timedelta`` object, the session
-        will expire at that specific future time.
-
-        If ``value`` is ``None``, the session uses the global session expiry
-        policy.
-        """
-        if value is None:
-            # Remove any custom expiration for this session.
-            try:
-                del self['_session_expiry']
-            except KeyError:
-                pass
-            return
-        if isinstance(value, timedelta):
-            value = timezone.now() + value
-        self['_session_expiry'] = value
-
-    def get_expire_at_browser_close(self):
-        """
-        Returns ``True`` if the session is set to expire when the browser
-        closes, and ``False`` if there's an expiry date. Use
-        ``get_expiry_date()`` or ``get_expiry_age()`` to find the actual expiry
-        date/age, if there is one.
-        """
-        if self.get('_session_expiry') is None:
-            return settings.SESSION_EXPIRE_AT_BROWSER_CLOSE
-        return self.get('_session_expiry') == 0
-
-    def flush(self):
-        """
-        Removes the current session data from the database and regenerates the
-        key.
-        """
-        self.clear()
-        self.delete()
-        self.create()
-
-    def cycle_key(self):
-        """
-        Creates a new session key, whilst retaining the current session data.
-        """
-        data = self._session_cache
-        key = self.session_key
-        self.create()
-        self._session_cache = data
-        self.delete(key)
-
-    # Methods that child classes must implement.
-
-    def exists(self, session_key):
-        """
-        Returns True if the given session_key already exists.
-        """
-        raise NotImplementedError
-
-    def create(self):
-        """
-        Creates a new session instance. Guaranteed to create a new object with
-        a unique key and will have saved the result once (with empty data)
-        before the method returns.
-        """
-        raise NotImplementedError
-
-    def save(self, must_create=False):
-        """
-        Saves the session data. If 'must_create' is True, a new session object
-        is created (otherwise a CreateError exception is raised). Otherwise,
-        save() can update an existing object with the same key.
-        """
-        raise NotImplementedError
-
-    def delete(self, session_key=None):
-        """
-        Deletes the session data under this key. If the key is None, the
-        current session key value is used.
-        """
-        raise NotImplementedError
-
-    def load(self):
-        """
-        Loads the session data and returns a dictionary.
-        """
-        raise NotImplementedError
-
-    @classmethod
-    def clear_expired(cls):
-        """
-        Remove expired sessions from the session store.
-
-        If this operation isn't possible on a given backend, it should raise
-        NotImplementedError. If it isn't necessary, because the backend has
-        a built-in expiration mechanism, it should be a no-op.
-        """
-        raise NotImplementedError