Release 1.5.3 (3/2/2010)
* Fix Python 2.4 incompatibility with google import.
Release 1.5.2 (3/1/2010)
* pkg_resources scanning for additional Beaker back-ends gracefully handles
situations where its not present (GAE). Fixes #36.
* Avoid timing attacks on hash comparison.
* Provide abstract base for MemoryNamespaceManager that deals with
* Added tests for invalidating cache, and fixed bug with function cache when
no args are present.
* The SQLAlchemy backends require SQLAlchemy 0.4 or greater (0.6 recommended).
* Rudimental Python 3 support is now available. Simply use Python 3 with
Distribute and "python setup.py install" to run 2to3 automatically,
or manually run 2to3 on "beaker" and "tests" to convert to a
Python 3 version.
* Added support for PyCrypto module to encrypted session, etc. in addition
to the existing pycryptopp support.
Release 1.5.1 (12/17/2009)
* Fix cache namespacing.
Release 1.5 (11/23/2009)
* Update memcached to default to using pylibmc when available.
* Fix bug when cache value doesn't exist causing has_key to throw
an exception rather than return False. Fixes #24.
* Fix bug where getpid under GAE is used improperly to assume it
should be a non-string. Fixes #22.
* Add cache_region decorator that works *before* configuration of
the cache regions have been completed for use in module-level
* Fix bug where has_value sees the value before its removed.
* Improved accuracy of "dogpile" checker by removing dependency
on "self" attributes, which seem to be slightly unreliable
in highly concurrent scenarios.
Release 1.4.2 (9/25/2009)
* Fix bug where memcached may yank a value after the has_value but before
the value can be fetched.
* Fix properties for setting the path. Fixes #15.
* Fix the 'TypeError: argument must be an int, or have a fileno()
method' erorr sporadically emitted by FileSynchronizer under moderate
Release 1.4.1 (9/10/2009)
* Fix verification of options to throw an error if a beaker param is an
* Add CacheManager.invalidate function to easily invalidate cache
spaces created by the use of the cache decorator.
* Add CacheManager.region_invalidate function to easily invalidate cache
spaces created by the use of the cache_region decorator.
* Fix the InvalidCryptoBackendError exception triggering a TypeError. Patch
from dz, fixes #13.
Release 1.4 (7/24/2009)
* Fix bug with hmac on Python 2.4. Patch from toshio, closes ticket #2133
from the TurboGears2 Trac.
* Fix bug with occasional ValueError from FileNamespaceManager.do_open.
* Fixed bug with session files being saved despite being new and not
* Fixed bug with CacheMiddleware overwriting configuration with default
arguments despite prior setting.
* Fixed bug with SyntaxError not being caught properly in entry point
* Changed to using BlobProperty for Google Datastore.
* Added domain/path properties to the session. This allows one to
dynamically set the cookie's domain and/or path on the fly, which
will then be set on the cookie for the session.
* Added support for cookie-based sessions in Jython via the JCE (Java
Cryptography Extensions). Patch from Alex Grönholm.
* Update Beaker database extensions to work with SQLAlchemy 0.6
PostgreSQL, and Jython.
Release 1.3.1 (5/5/2009)
* Added a whole bunch of Sphinx documentation for the updated site.
* Added corresponding remove as an alias to the caches remove_value.
* Fixed cookie session not having an invalidate function.
* Fix bug with CacheMiddleware not using proper function to load
configuration options, missing the cache regions.
Release 1.3 (4/6/2009)
* Added last_accessed attribute to session to indicate the previous time the
session was last accessed.
* Added setuptools entry points to dynamically discover additional namespace
* Fixed bug with invalidate and locks, fixes #594.
* Added cache.cache decorator for arbitrary caching.
* Added cache.region decorator to the CacheManager object.
* Added cache regions. Can be provided in a configuration INI type, or
by adding in a cache_regions arg to the CacheManager.
* Fix bug with timeout not being saved properly.
* Fix bug with cookie-only sessions sending cookies for new sessions even
if they weren't supposed to be saved.
* Fix bug that caused a non-auto accessed session to not record the time it
was previously accessed resulting in session timeouts.
* Add function to parse configuration dicts as appropriate for use with the
* The "expiretime" is no longer passed to the memcached backend - since
if memcached makes the expired item unavailable at the same time the
container expires it, then all actors must block until the new value
is available (i.e. breaks the anti-dogpile logic).
Release 1.2.3 (3/2/2009)
* Fix accessed increment to take place *after* the accessed time is checked
to see if it has expired. Fixes #580.
* data_dir/lock_dir parameters are optional to most backends; if not
present, mutex-based locking will be used for creation functions
* Adjustments to Container to better account for backends which
don't provide read/write locks, such as memcached. As a result,
the plain "memory" cache no longer requires read/write mutexing.
Release 1.2.2 (2/14/2009)
* Fix delete bug reported by andres with session not being deleted.
Release 1.2.1 (2/09/2009)
* Fix memcached behavior as memcached returns None on nonexistent key
fetch which broke invalid session checking.
Release 1.2 (1/22/2009)
* Updated session to only save to the storage *once* no under any/all
conditions rather than every time save() is called.
* Added session.revert() function that reverts the session to the state at
the beginning of the request.
* Updated session to store entire session data in a single namespace key,
this lets memcached work properly, and makes for more efficient use of the
storage system for sessions.
Release 1.1.3 (12/29/2008)
* Fix the 1.1.2 old cache/session upgrader to handle the has_current_value
* Make InvalidCacheBackendError an ImportError.
Release 1.1.2 (11/24/2008)
* Upgrade Beaker pre-1.1 cache/session values to the new format rather than
throwing an exception.
Release 1.1.1 (11/24/2008)
* Fixed bug in Google extension which passed arguments it should no longer
pass to NamespaceManager.
* Fixed bug involving lockfiles left open during cache "value creation"
Release 1.1 (11/16/2008)
* file-based cache will not hold onto cached value once read from file;
will create new value if the file is deleted as opposed to re-using
what was last read. This allows external removal of files to be
used as a cache-invalidation mechanism.
* file-based locking will not unlink lockfiles; this can interfere
with the flock() mechanism in the event that a concurrent process
is accessing the files.
* Sending "type" and other namespace config arguments to cache.get()/
cache.put()/cache.remove_value() is deprecated. The namespace
configuration is now preferred at the Cache level, i.e. when you construct
a Cache or call cache_manager.get_cache(). This removes the ambiguity
of Cache's dictionary interface and has_key() methods, which have
no awareness of those arguments.
* the "expiretime" in use is stored in the cache itself, so that it is
always available when calling has_key() and other methods. Between
this change and the deprecation of 'type', the Cache no longer has
any need to store cache configuration in memory per cache key, which in a
dynamically-generated key scenario stores an arbitrarily large number
of configurations - essentially a memory leak.
* memcache caching has been vastly improved, no longer stores a list of
all keys, which along the same theme prevented efficient usage for an
arbitrarily large number of keys. The keys() method is now unimplemented,
and cache.remove() clears the entire memcache cache across all namespaces.
This is what the memcache API provides so it's the best we can do.
* memcache caching passes along "expiretime" to the memcached "time"
parameter, so that the cache itself can reduce its size for elements which
are expired (memcache seems to manage its size in any case, this is just a
hint to improve its operation).
* replaced homegrown ThreadLocal implementation with threading.local, falls
back to a 2.3 compat one for python<2.4
Release 1.0.3 (10/14/2008)
* Fixed os.getpid issue on GAE.
* CookieSession will add '_expires' value to data when an expire time is set,
and uses it
Release 1.0.2 (9/22/2008)
* Fixed bug caused when attempting to invalidate a session that hadn't
previously been created.
Release 1.0.1 (8/19/2008)
* Bug fix for cookie sessions to retain id before clearing values.
Release 1.0 (8/13/2008)
* Added cookie delete to both cookie only sessions and normal sessions, to
help with proxies and such that may determine whether a user is logged in
via a cookie. (cookie varies, etc.). Suggested by Felix Schwarz.
* cache.get_value() now uses the given **kwargs in all cases in the same
manner as cache.set_value(). This way you can send a new createfunc
to cache.get_value() each time and it will be used.
Release 0.9.5 (6/19/2008)
* Fixed bug in memcached to be tolerant of keys disappearing when memcached
* Fixed the cache functionality to actually work, previously set_value was
ignored if there was already a value set.
Release 0.9.4 (4/13/2008)
* Adding 'google' backend datastore, available by specifying 'google' as the
cache/session type. Note that this takes an optional table_name used to name
the model class used.
* SECURITY BUG: Fixed security issue with Beaker not properly removing
directory escaping characters from the session ID when un-signed sessions
are used. Reported with patch by Felix Schwarz.
* Fixed bug with Beaker not playing well with Registry when its placed above
it in the stack. Thanks Wichert Akkerman.
Release 0.9.3 (2/28/2008)
* Adding 'id' to cookie-based sessions for better compatibility.
* Fixed error with exception still raised for PyCrypto missing.
* WARNING: Session middleware no longer catches Paste HTTP Exceptions, apps
are now expected to capture and handle Paste HTTP Exceptions themselves.
* Fixed Python 2.4 compatibility bug in hmac.
* Fixed key lookup bug on cache object to only use the settings for the key
lookup. Found by Andrew Stromnov.
Release 0.9.2 (2/13/2008)
* Added option to make Beaker use a secure cookie.
* Removed CTRCipher as pycryptopp doesn't need it.
* Changed AES to use 256 bit.
* Fixed signing code to use hmac with sha for better signing security.
* Fixed memcached code to use delete_multi on clearing the keys for efficiency
and updated key retrieval to properly store and retrieve None values.
* Removing cookie.py and signed cookie middleware, as the environ_key option
for session middleware provides a close enough setting.
* Added option to use just cookie-based sessions without requiring
* Switched encryption requirement from PyCrypto to pycryptopp which uses a
proper AES in Counter Mode.
Release 0.9.1 (2/4/2008)
* Fixed bug in middleware using module that wasn't imported.
Release 0.9 (12/17/07)
* Fixed bug in memcached replace to actually replace spaces properly.
* Fixed md5 cookie signature to use SHA-1 when available.
* Updated cookie-based session storage to use 256-bit AES-CTR mode with a
SHA-1 HMAC signature. Now requires PyCrypto to use for AES scheme.
* WARNING: Moved session and cache middleware to middleware, as per the old
deprecation warnings had said was going to happen for 0.8.
* Added cookie-only session storage with RC4 ciphered encryption, requires
* Add the ability to specify the cookie's domain for sessions.
Release 0.8.1 (11/15/07)
* Fixed bug in database.py not properly handling missing sqlalchemy library.
Release 0.8 (10/17/07)
* Fixed bug in prior db update causing session to occasionally not be written
back to the db.
* Fixed memcached key error with keys containing spaces. Thanks Jim Musil.
* WARNING: Major change to ext:database to use a single row per namespace.
Additionally, there's an accessed and created column present to support
easier deletion of old cache/session data. You *will* need to drop any
existing tables being used by the ext:database backend.
* Streamline ext:database backend to avoid unnecessary database selects for
* Added SQLAlchemy 0.4 support to ext:database backend.
Release 0.7.5 (08/18/07)
* Fixed data_dir parsing for session string coercions, no longer picks up None
as a data_dir.
* Fixed session.get_by_id to lookup recently saved sessions properly, also
updates session with creation/access time upon save.
* Add unit tests for get_by_id function. Updated get_by_id to not result in
additional session files.
* Added session.get_by_id function to retrieve a session of the given id.
Release 0.7.4 (07/09/07)
* Fixed issue with Beaker not properly handling arguments as Pylons may pass
* Fixed unit test to catch file removal exception.
* Fixed another bug in synchronization, this one involving reentrant
conditions with file synchronization
* If a file open fails due to pickling errors, locks just opened
are released unconditionally
Release 0.7.3 (06/08/07)
* Beaker was not properly parsing input options to session middleware. Thanks
to Yannick Gingras and Timothy S for spotting the issue.
* Changed session to only send the cookie header if its a new session and
save() was called. Also only creates the session file under these
Release 0.7.2 (05/19/07)
* Added deprecation warning for middleware move, relocated middleware to cache
and session modules for backwards compatibility.
Release 0.7.1 05/18/07)
* adjusted synchronization logic to account for Mako/new Cache object's
multithreaded usage of Container.
Release 0.7 (05/18/07)
* WARNING: Cleaned up Cache object based on Mako cache object, this changes
the call interface slightly for creating a Cache object directly. The
middleware cache object is unaffected from an end-user view. This change
also avoids duplicate creations of Cache objects.
* Adding database backend and unit tests.
* Added memcached test, fixed memcached namespace arg passing.
* Fixed session and cache tests, still failing syncdict test. Added doctests
for Cache and Session middleware.
* Cleanup of container/cache/container_test
* Namespaces no longer require a context, removed NamespaceContext?
* Logging in container.py uses logging module
* Cleanup of argument passing, use name **kwargs instead of **params for
* Container classes contain a static create_namespace() method, namespaces are
accessed from the ContainerContext? via string name + container class alone
* Implemented (but not yet tested) clear() method on Cache, locates all
Namespaces used thus far and clears each one based on its keys() collection
* Fixed Cache.clear() method to actually clear the Cache namespace.
* Updated memcached backend to split servers on ';' for multiple memcached
* Merging MyghtyUtils code into Beaker.
Release 0.6.3 (03/18/2007)
* Added api with customized Session that doesn't require a Myghty request
object, just a dict. Updated session to use the new version.
* Removing unicode keys as some dbm backends can't handle unicode keys.
* Adding core files that should've been here.
* More stringent checking for existence of a session.
* Avoid recreating the session object when it's empty.