added all server files

5 files changed, 450 insertions, 0 deletions

diff --git a/lib/python2.7/site-packages/django/contrib/messages/storage/__init__.py b/lib/python2.7/site-packages/django/contrib/messages/storage/__init__.py
new file mode 100644
index 0000000..9a09aff
--- /dev/null
+++ b/lib/python2.7/site-packages/django/contrib/messages/storage/__init__.py
@@ -0,0 +1,8 @@
+from django.conf import settings
+from django.utils.module_loading import import_by_path as get_storage
+
+
+# Callable with the same interface as the storage classes i.e.  accepts a
+# 'request' object.  It is wrapped in a lambda to stop 'settings' being used at
+# the module level
+default_storage = lambda request: get_storage(settings.MESSAGE_STORAGE)(request)
diff --git a/lib/python2.7/site-packages/django/contrib/messages/storage/base.py b/lib/python2.7/site-packages/django/contrib/messages/storage/base.py
new file mode 100644
index 0000000..7fe8a07
--- /dev/null
+++ b/lib/python2.7/site-packages/django/contrib/messages/storage/base.py
@@ -0,0 +1,184 @@
+from __future__ import unicode_literals
+
+from django.conf import settings
+from django.utils.encoding import force_text, python_2_unicode_compatible
+from django.contrib.messages import constants, utils
+
+
+LEVEL_TAGS = utils.get_level_tags()
+
+
+@python_2_unicode_compatible
+class Message(object):
+    """
+    Represents an actual message that can be stored in any of the supported
+    storage classes (typically session- or cookie-based) and rendered in a view
+    or template.
+    """
+
+    def __init__(self, level, message, extra_tags=None):
+        self.level = int(level)
+        self.message = message
+        self.extra_tags = extra_tags
+
+    def _prepare(self):
+        """
+        Prepares the message for serialization by forcing the ``message``
+        and ``extra_tags`` to unicode in case they are lazy translations.
+
+        Known "safe" types (None, int, etc.) are not converted (see Django's
+        ``force_text`` implementation for details).
+        """
+        self.message = force_text(self.message, strings_only=True)
+        self.extra_tags = force_text(self.extra_tags, strings_only=True)
+
+    def __eq__(self, other):
+        return isinstance(other, Message) and self.level == other.level and \
+                                              self.message == other.message
+
+    def __str__(self):
+        return force_text(self.message)
+
+    def _get_tags(self):
+        label_tag = force_text(LEVEL_TAGS.get(self.level, ''),
+                                  strings_only=True)
+        extra_tags = force_text(self.extra_tags, strings_only=True)
+        if extra_tags and label_tag:
+            return ' '.join([extra_tags, label_tag])
+        elif extra_tags:
+            return extra_tags
+        elif label_tag:
+            return label_tag
+        return ''
+    tags = property(_get_tags)
+
+
+class BaseStorage(object):
+    """
+    This is the base backend for temporary message storage.
+
+    This is not a complete class; to be a usable storage backend, it must be
+    subclassed and the two methods ``_get`` and ``_store`` overridden.
+    """
+
+    def __init__(self, request, *args, **kwargs):
+        self.request = request
+        self._queued_messages = []
+        self.used = False
+        self.added_new = False
+        super(BaseStorage, self).__init__(*args, **kwargs)
+
+    def __len__(self):
+        return len(self._loaded_messages) + len(self._queued_messages)
+
+    def __iter__(self):
+        self.used = True
+        if self._queued_messages:
+            self._loaded_messages.extend(self._queued_messages)
+            self._queued_messages = []
+        return iter(self._loaded_messages)
+
+    def __contains__(self, item):
+        return item in self._loaded_messages or item in self._queued_messages
+
+    @property
+    def _loaded_messages(self):
+        """
+        Returns a list of loaded messages, retrieving them first if they have
+        not been loaded yet.
+        """
+        if not hasattr(self, '_loaded_data'):
+            messages, all_retrieved = self._get()
+            self._loaded_data = messages or []
+        return self._loaded_data
+
+    def _get(self, *args, **kwargs):
+        """
+        Retrieves a list of stored messages. Returns a tuple of the messages
+        and a flag indicating whether or not all the messages originally
+        intended to be stored in this storage were, in fact, stored and
+        retrieved; e.g., ``(messages, all_retrieved)``.
+
+        **This method must be implemented by a subclass.**
+
+        If it is possible to tell if the backend was not used (as opposed to
+        just containing no messages) then ``None`` should be returned in
+        place of ``messages``.
+        """
+        raise NotImplementedError()
+
+    def _store(self, messages, response, *args, **kwargs):
+        """
+        Stores a list of messages, returning a list of any messages which could
+        not be stored.
+
+        One type of object must be able to be stored, ``Message``.
+
+        **This method must be implemented by a subclass.**
+        """
+        raise NotImplementedError()
+
+    def _prepare_messages(self, messages):
+        """
+        Prepares a list of messages for storage.
+        """
+        for message in messages:
+            message._prepare()
+
+    def update(self, response):
+        """
+        Stores all unread messages.
+
+        If the backend has yet to be iterated, previously stored messages will
+        be stored again. Otherwise, only messages added after the last
+        iteration will be stored.
+        """
+        self._prepare_messages(self._queued_messages)
+        if self.used:
+            return self._store(self._queued_messages, response)
+        elif self.added_new:
+            messages = self._loaded_messages + self._queued_messages
+            return self._store(messages, response)
+
+    def add(self, level, message, extra_tags=''):
+        """
+        Queues a message to be stored.
+
+        The message is only queued if it contained something and its level is
+        not less than the recording level (``self.level``).
+        """
+        if not message:
+            return
+        # Check that the message level is not less than the recording level.
+        level = int(level)
+        if level < self.level:
+            return
+        # Add the message.
+        self.added_new = True
+        message = Message(level, message, extra_tags=extra_tags)
+        self._queued_messages.append(message)
+
+    def _get_level(self):
+        """
+        Returns the minimum recorded level.
+
+        The default level is the ``MESSAGE_LEVEL`` setting. If this is
+        not found, the ``INFO`` level is used.
+        """
+        if not hasattr(self, '_level'):
+            self._level = getattr(settings, 'MESSAGE_LEVEL', constants.INFO)
+        return self._level
+
+    def _set_level(self, value=None):
+        """
+        Sets a custom minimum recorded level.
+
+        If set to ``None``, the default level will be used (see the
+        ``_get_level`` method).
+        """
+        if value is None and hasattr(self, '_level'):
+            del self._level
+        else:
+            self._level = int(value)
+
+    level = property(_get_level, _set_level, _set_level)
diff --git a/lib/python2.7/site-packages/django/contrib/messages/storage/cookie.py b/lib/python2.7/site-packages/django/contrib/messages/storage/cookie.py
new file mode 100644
index 0000000..619c692
--- /dev/null
+++ b/lib/python2.7/site-packages/django/contrib/messages/storage/cookie.py
@@ -0,0 +1,158 @@
+import json
+
+from django.conf import settings
+from django.contrib.messages.storage.base import BaseStorage, Message
+from django.http import SimpleCookie
+from django.utils.crypto import salted_hmac, constant_time_compare
+from django.utils.safestring import SafeData, mark_safe
+from django.utils import six
+
+
+class MessageEncoder(json.JSONEncoder):
+    """
+    Compactly serializes instances of the ``Message`` class as JSON.
+    """
+    message_key = '__json_message'
+
+    def default(self, obj):
+        if isinstance(obj, Message):
+            # Using 0/1 here instead of False/True to produce more compact json
+            is_safedata = 1 if isinstance(obj.message, SafeData) else 0
+            message = [self.message_key, is_safedata, obj.level, obj.message]
+            if obj.extra_tags:
+                message.append(obj.extra_tags)
+            return message
+        return super(MessageEncoder, self).default(obj)
+
+
+class MessageDecoder(json.JSONDecoder):
+    """
+    Decodes JSON that includes serialized ``Message`` instances.
+    """
+
+    def process_messages(self, obj):
+        if isinstance(obj, list) and obj:
+            if obj[0] == MessageEncoder.message_key:
+                if obj[1]:
+                    obj[3] = mark_safe(obj[3])
+                return Message(*obj[2:])
+            return [self.process_messages(item) for item in obj]
+        if isinstance(obj, dict):
+            return dict([(key, self.process_messages(value))
+                         for key, value in six.iteritems(obj)])
+        return obj
+
+    def decode(self, s, **kwargs):
+        decoded = super(MessageDecoder, self).decode(s, **kwargs)
+        return self.process_messages(decoded)
+
+class CookieStorage(BaseStorage):
+    """
+    Stores messages in a cookie.
+    """
+    cookie_name = 'messages'
+    # uwsgi's default configuration enforces a maximum size of 4kb for all the
+    # HTTP headers. In order to leave some room for other cookies and headers,
+    # restrict the session cookie to 1/2 of 4kb. See #18781.
+    max_cookie_size = 2048
+    not_finished = '__messagesnotfinished__'
+
+    def _get(self, *args, **kwargs):
+        """
+        Retrieves a list of messages from the messages cookie.  If the
+        not_finished sentinel value is found at the end of the message list,
+        remove it and return a result indicating that not all messages were
+        retrieved by this storage.
+        """
+        data = self.request.COOKIES.get(self.cookie_name)
+        messages = self._decode(data)
+        all_retrieved = not (messages and messages[-1] == self.not_finished)
+        if messages and not all_retrieved:
+            # remove the sentinel value
+            messages.pop()
+        return messages, all_retrieved
+
+    def _update_cookie(self, encoded_data, response):
+        """
+        Either sets the cookie with the encoded data if there is any data to
+        store, or deletes the cookie.
+        """
+        if encoded_data:
+            response.set_cookie(self.cookie_name, encoded_data,
+                domain=settings.SESSION_COOKIE_DOMAIN)
+        else:
+            response.delete_cookie(self.cookie_name,
+                domain=settings.SESSION_COOKIE_DOMAIN)
+
+    def _store(self, messages, response, remove_oldest=True, *args, **kwargs):
+        """
+        Stores the messages to a cookie, returning a list of any messages which
+        could not be stored.
+
+        If the encoded data is larger than ``max_cookie_size``, removes
+        messages until the data fits (these are the messages which are
+        returned), and add the not_finished sentinel value to indicate as much.
+        """
+        unstored_messages = []
+        encoded_data = self._encode(messages)
+        if self.max_cookie_size:
+            # data is going to be stored eventually by SimpleCookie, which
+            # adds it's own overhead, which we must account for.
+            cookie = SimpleCookie() # create outside the loop
+            def stored_length(val):
+                return len(cookie.value_encode(val)[1])
+
+            while encoded_data and stored_length(encoded_data) > self.max_cookie_size:
+                if remove_oldest:
+                    unstored_messages.append(messages.pop(0))
+                else:
+                    unstored_messages.insert(0, messages.pop())
+                encoded_data = self._encode(messages + [self.not_finished],
+                                            encode_empty=unstored_messages)
+        self._update_cookie(encoded_data, response)
+        return unstored_messages
+
+    def _hash(self, value):
+        """
+        Creates an HMAC/SHA1 hash based on the value and the project setting's
+        SECRET_KEY, modified to make it unique for the present purpose.
+        """
+        key_salt = 'django.contrib.messages'
+        return salted_hmac(key_salt, value).hexdigest()
+
+    def _encode(self, messages, encode_empty=False):
+        """
+        Returns an encoded version of the messages list which can be stored as
+        plain text.
+
+        Since the data will be retrieved from the client-side, the encoded data
+        also contains a hash to ensure that the data was not tampered with.
+        """
+        if messages or encode_empty:
+            encoder = MessageEncoder(separators=(',', ':'))
+            value = encoder.encode(messages)
+            return '%s$%s' % (self._hash(value), value)
+
+    def _decode(self, data):
+        """
+        Safely decodes a encoded text stream back into a list of messages.
+
+        If the encoded text stream contained an invalid hash or was in an
+        invalid format, ``None`` is returned.
+        """
+        if not data:
+            return None
+        bits = data.split('$', 1)
+        if len(bits) == 2:
+            hash, value = bits
+            if constant_time_compare(hash, self._hash(value)):
+                try:
+                    # If we get here (and the JSON decode works), everything is
+                    # good. In any other case, drop back and return None.
+                    return json.loads(value, cls=MessageDecoder)
+                except ValueError:
+                    pass
+        # Mark the data as used (so it gets removed) since something was wrong
+        # with the data.
+        self.used = True
+        return None
diff --git a/lib/python2.7/site-packages/django/contrib/messages/storage/fallback.py b/lib/python2.7/site-packages/django/contrib/messages/storage/fallback.py
new file mode 100644
index 0000000..6c35343
--- /dev/null
+++ b/lib/python2.7/site-packages/django/contrib/messages/storage/fallback.py
@@ -0,0 +1,54 @@
+from django.contrib.messages.storage.base import BaseStorage
+from django.contrib.messages.storage.cookie import CookieStorage
+from django.contrib.messages.storage.session import SessionStorage
+
+class FallbackStorage(BaseStorage):
+    """
+    Tries to store all messages in the first backend, storing any unstored
+    messages in each subsequent backend backend.
+    """
+    storage_classes = (CookieStorage, SessionStorage)
+
+    def __init__(self, *args, **kwargs):
+        super(FallbackStorage, self).__init__(*args, **kwargs)
+        self.storages = [storage_class(*args, **kwargs)
+                         for storage_class in self.storage_classes]
+        self._used_storages = set()
+
+    def _get(self, *args, **kwargs):
+        """
+        Gets a single list of messages from all storage backends.
+        """
+        all_messages = []
+        for storage in self.storages:
+            messages, all_retrieved = storage._get()
+            # If the backend hasn't been used, no more retrieval is necessary.
+            if messages is None:
+                break
+            if messages:
+                self._used_storages.add(storage)
+            all_messages.extend(messages)
+            # If this storage class contained all the messages, no further
+            # retrieval is necessary
+            if all_retrieved:
+                break
+        return all_messages, all_retrieved
+
+    def _store(self, messages, response, *args, **kwargs):
+        """
+        Stores the messages, returning any unstored messages after trying all
+        backends.
+
+        For each storage backend, any messages not stored are passed on to the
+        next backend.
+        """
+        for storage in self.storages:
+            if messages:
+                messages = storage._store(messages, response,
+                                          remove_oldest=False)
+            # Even if there are no more messages, continue iterating to ensure
+            # storages which contained messages are flushed.
+            elif storage in self._used_storages:
+                storage._store([], response)
+                self._used_storages.remove(storage)
+        return messages
diff --git a/lib/python2.7/site-packages/django/contrib/messages/storage/session.py b/lib/python2.7/site-packages/django/contrib/messages/storage/session.py
new file mode 100644
index 0000000..c3e293c
--- /dev/null
+++ b/lib/python2.7/site-packages/django/contrib/messages/storage/session.py
@@ -0,0 +1,46 @@
+import json
+
+from django.contrib.messages.storage.base import BaseStorage
+from django.contrib.messages.storage.cookie import MessageEncoder, MessageDecoder
+from django.utils import six
+
+
+class SessionStorage(BaseStorage):
+    """
+    Stores messages in the session (that is, django.contrib.sessions).
+    """
+    session_key = '_messages'
+
+    def __init__(self, request, *args, **kwargs):
+        assert hasattr(request, 'session'), "The session-based temporary "\
+            "message storage requires session middleware to be installed, "\
+            "and come before the message middleware in the "\
+            "MIDDLEWARE_CLASSES list."
+        super(SessionStorage, self).__init__(request, *args, **kwargs)
+
+    def _get(self, *args, **kwargs):
+        """
+        Retrieves a list of messages from the request's session.  This storage
+        always stores everything it is given, so return True for the
+        all_retrieved flag.
+        """
+        return self.deserialize_messages(self.request.session.get(self.session_key)), True
+
+    def _store(self, messages, response, *args, **kwargs):
+        """
+        Stores a list of messages to the request's session.
+        """
+        if messages:
+            self.request.session[self.session_key] = self.serialize_messages(messages)
+        else:
+            self.request.session.pop(self.session_key, None)
+        return []
+
+    def serialize_messages(self, messages):
+        encoder = MessageEncoder(separators=(',', ':'))
+        return encoder.encode(messages)
+
+    def deserialize_messages(self, data):
+        if data and isinstance(data, six.string_types):
+            return json.loads(data, cls=MessageDecoder)
+        return data