Ticket numbers in this file can be looked up by visiting
http://twistedmatrix.com/trac/ticket/<number>

Twisted Core 12.0.0 (2012-02-10)
================================

Features
--------
 - The interface argument to IReactorTCP.listenTCP may now be an IPv6
   address literal, allowing the creation of IPv6 TCP servers. (#5084)
 - twisted.python.constants.Names now provides a way to define
   collections of named constants, similar to the "enum type" feature
   of C or Java. (#5382)
 - twisted.python.constants.Values now provides a way to define
   collections of named constants with arbitrary values. (#5383)

Bugfixes
--------
 - Fixed an obscure case where connectionLost wasn't called on the
   protocol when using half-close. (#3037)
 - UDP ports handle socket errors better on Windows. (#3396)
 - When idle, the gtk2 and glib2 reactors no longer wake up 10 times a
   second. (#4376)
 - Prevent a rare situation involving TLS transports, where a producer
   may be erroneously left unpaused. (#5347)
 - twisted.internet.iocpreactor.iocpsupport now has fewer 64-bit
   compile warnings. (#5373)
 - The GTK2 reactor is now more responsive on Windows. (#5396)
 - TLS transports now correctly handle producer registration after the
   connection has been lost. (#5439)
 - twisted.protocols.htb.Bucket now empties properly with a non-zero
   drip rate. (#5448)
 - IReactorSSL and ITCPTransport.startTLS now synchronously propagate
   errors from the getContext method of context factories, instead of
   being capturing them and logging them as unhandled. (#5449)

Improved Documentation
----------------------
 - The multicast documentation has been expanded. (#4262)
 - twisted.internet.defer.Deferred now documents more return values.
   (#5399)
 - Show a better starting page at
   http://twistedmatrix.com/documents/current (#5429)

Deprecations and Removals
-------------------------
 - Remove the deprecated module twisted.enterprise.reflector. (#4108)
 - Removed the deprecated module twisted.enterprise.row. (#4109)
 - Remove the deprecated module twisted.enterprise.sqlreflector.
   (#4110)
 - Removed the deprecated module twisted.enterprise.util, as well as
   twisted.enterprise.adbapi.safe. (#4111)
 - Python 2.4 is no longer supported on any platform. (#5060)
 - Removed printTraceback and noOperation from twisted.spread.pb,
   deprecated since Twisted 8.2. (#5370)

Other
-----
 - #1712, #2725, #5284, #5325, #5331, #5362, #5364, #5371, #5407,
   #5427, #5430, #5431, #5440, #5441


Twisted Core 11.1.0 (2011-11-15)
================================

Features
--------
 - TCP and TLS transports now support abortConnection() which, unlike
   loseConnection(), always closes the connection immediately. (#78)
 - Failures received over PB when tracebacks are disabled now display
   the wrapped exception value when they are printed. (#581)
 - twistd now has a --logger option, allowing the use of custom log
   observers. (#638)
 - The default reactor is now poll(2) on platforms that support it.
   (#2234)
 - twisted.internet.defer.inlineCallbacks(f) now raises TypeError when
   f returns something other than a generator or uses returnValue as a
   non-generator. (#2501)
 - twisted.python.usage.Options now supports performing Zsh tab-
   completion on demand. Tab-completion for Twisted commands is
   supported out-of-the-box on any recent zsh release. Third-party
   commands may take advantage of zsh completion by copying the
   provided stub file. (#3078)
 - twisted.protocols.portforward now uses flow control between its
   client and server connections to avoid having to buffer an
   unbounded amount of data when one connection is slower than the
   other. (#3350)
 - On Windows, the select, IOCP, and Gtk2 reactors now implement
   IReactorWin32Events (most notably adding support for serial ports
   to these reactors). (#4862)
 - twisted.python.failure.Failure no longer captures the state of
   locals and globals of all stack frames by default, because it is
   expensive to do and rarely used.  You can pass captureVars=True to
   Failure's constructor if you want to capture this data. (#5011)
 - twisted.web.client now supports automatic content-decoding via
   twisted.web.client.ContentDecoderAgent, gzip being supported for
   now. (#5053)
 - Protocols may now implement ILoggingContext to customize their
   logging prefix.  twisted.protocols.policies.ProtocolWrapper and the
   endpoints wrapper now take advantage of this feature to ensure the
   application protocol is still reflected in logs. (#5062)
 - AMP's raw message-parsing performance was increased by
   approximately 12%. (#5075)
 - Twisted is now installable on PyPy, because some incompatible C
   extensions are no longer built. (#5158)
 - twisted.internet.defer.gatherResults now accepts a consumeErrors
   parameter, with the same meaning as the corresponding argument for
   DeferredList. (#5159)
 - Added RMD (remove directory) support to the FTP client. (#5259)
 - Server factories may now implement ILoggingContext to customize the
   name that is logged when the reactor uses one to start listening on
   a port. (#5292)
 - The implementations of ITransport.writeSequence will now raise
   TypeError if passed unicode strings. (#3896)
 - iocp reactor now operates correctly on 64 bit Python runtimes.
   (#4669)
 - twistd ftp now supports the cred plugin. (#4752)
 - twisted.python.filepath.FilePath now has an API to retrieve the
   permissions of the underlying file, and two methods to determine
   whether it is a block device or a socket.  (#4813)
 - twisted.trial.unittest.TestCase is now compatible with Python 2.7's
   assertDictEqual method. (#5291)

Bugfixes
--------
 - The IOCP reactor now does not try to erroneously pause non-
   streaming producers. (#745)
 - Unicode print statements no longer blow up when using Twisted's
   logging system. (#1990)
 - Process transports on Windows now support the `writeToChild` method
   (but only for stdin). (#2838)
 - Zsh tab-completion of Twisted commands no longer relies on
   statically generated files, but instead generates results on-the-
   fly - ensuring accurate tab-completion for the version of Twisted
   actually in use. (#3078)
 - LogPublishers don't use the global log publisher for reporting
   broken observers anymore. (#3307)
 - trial and twistd now add the current directory to sys.path even
   when running as root or on Windows. mktap, tapconvert, and
   pyhtmlizer no longer add the current directory to sys.path. (#3526)
 - twisted.internet.win32eventreactor now stops immediately if
   reactor.stop() is called from an IWriteDescriptor.doWrite
   implementation instead of delaying shutdown for an arbitrary period
   of time. (#3824)
 - twisted.python.log now handles RuntimeErrors more gracefully, and
   always restores log observers after an exception is raised. (#4379)
 - twisted.spread now supports updating new-style RemoteCache
   instances. (#4447)
 - twisted.spread.pb.CopiedFailure will no longer be thrown into a
   generator as a (deprecated) string exception but as a
   twisted.spread.pb.RemoteException. (#4520)
 - trial now gracefully handles the presence of objects in sys.modules
   which respond to attributes being set on them by modifying
   sys.modules. (#4748)
 - twisted.python.deprecate.deprecatedModuleAttribute no longer
   spuriously warns twice when used to deprecate a module within a
   package.  This should make it easier to write unit tests for
   deprecated modules. (#4806)
 - When pyOpenSSL 0.10 or newer is available, SSL support now uses
   Twisted for all I/O and only relies on OpenSSL for cryptography,
   avoiding a number of tricky, potentially broken edge cases. (#4854)
 - IStreamClientEndpointStringParser.parseStreamClient now correctly
   describes how it will be called by clientFromString (#4956)
 - twisted.internet.defer.Deferreds are 10 times faster at handling
   exceptions raised from callbacks, except when setDebugging(True)
   has been called. (#5011)
 - twisted.python.filepath.FilePath.copyTo now raises OSError(ENOENT)
   if the source path being copied does not exist. (#5017)
 - twisted.python.modules now supports iterating over namespace
   packages without yielding duplicates. (#5030)
 - reactor.spawnProcess now uses the resource module to guess the
   maximum possible open file descriptor when /dev/fd exists but gives
   incorrect results. (#5052)
 - The memory BIO TLS/SSL implementation now supports producers
   correctly. (#5063)
 - twisted.spread.pb.Broker no longer creates an uncollectable
   reference cycle when the logout callback holds a reference to the
   client mind object. (#5079)
 - twisted.protocols.tls, and SSL/TLS support in general, now do clean
   TLS close alerts when disconnecting. (#5118)
 - twisted.persisted.styles no longer uses the deprecated allYourBase
   function (#5193)
 - Stream client endpoints now start (doStart) and stop (doStop) the
   factory passed to the connect method, instead of a different
   implementation-detail factory. (#5278)
 - SSL ports now consistently report themselves as SSL rather than TCP
   when logging their close message. (#5292)
 - Serial ports now deliver connectionLost to the protocol when
   closed. (#3690)
 - win32eventreactor now behaves better in certain rare cases in which
   it previously would have failed to deliver connection lost
   notification to a protocol. (#5233)

Improved Documentation
----------------------
 - Test driven development with Twisted and Trial is now documented in
   a how-to. (#2443)
 - A new howto-style document covering twisted.protocols.amp has been
   added. (#3476)
 - Added sample implementation of a Twisted push producer/consumer
   system. (#3835)
 - The "Deferred in Depth" tutorial now includes accurate output for
   the deferred_ex2.py example. (#3941)
 - The server howto now covers the Factory.buildProtocol method.
   (#4761)
 - The testing standard and the trial tutorial now recommend the
   `assertEqual` form of assertions rather than the `assertEquals` to
   coincide with the standard library unittest's preference. (#4989)
 - twisted.python.filepath.FilePath's methods now have more complete
   API documentation (docstrings). (#5027)
 - The Clients howto now uses buildProtocol more explicitly, hopefully
   making it easier to understand where Protocol instances come from.
   (#5044)

Deprecations and Removals
-------------------------
 - twisted.internet.interfaces.IFinishableConsumer is now deprecated.
   (#2661)
 - twisted.python.zshcomp is now deprecated in favor of the tab-
   completion system in twisted.python.usage (#3078)
 - The unzip and unzipIter functions in twisted.python.zipstream are
   now deprecated. (#3666)
 - Options.optStrings, deprecated for 7 years, has been removed.  Use
   Options.optParameters instead. (#4552)
 - Removed the deprecated twisted.python.dispatch module. (#5023)
 - Removed the twisted.runner.procutils module that was deprecated in
   Twisted 2.3. (#5049)
 - Removed twisted.trial.runner.DocTestSuite, deprecated in Twisted
   8.0. (#5111)
 - twisted.scripts.tkunzip is now deprecated. (#5140)
 - Deprecated option --password-file in twistd ftp (#4752)
 - mktap, deprecated since Twisted 8.0, has been removed. (#5293)

Other
-----
 - #1946, #2562, #2674, #3074, #3077, #3776, #4227, #4539, #4587,
   #4619, #4624, #4629, #4683, #4690, #4702, #4778, #4944, #4945,
   #4949, #4952, #4957, #4979, #4980, #4987, #4990, #4994, #4995,
   #4997, #5003, #5008, #5009, #5012, #5019, #5042, #5046, #5051,
   #5065, #5083, #5088, #5089, #5090, #5101, #5108, #5109, #5112,
   #5114, #5125, #5128, #5131, #5136, #5139, #5144, #5146, #5147,
   #5156, #5160, #5165, #5191, #5205, #5215, #5217, #5218, #5223,
   #5243, #5244, #5250, #5254, #5261, #5266, #5273, #5299, #5301,
   #5302, #5304, #5308, #5311, #5321, #5322, #5327, #5328, #5332,
   #5336


Twisted Core 11.0.0 (2011-04-01)
================================

Features
--------
 - The reactor is not restartable, but it would previously fail to
   complain. Now, when you restart an unrestartable reactor, you get
   an exception. (#2066)
 - twisted.plugin now only emits a short log message, rather than a
   full traceback, if there is a problem writing out the dropin cache
   file. (#2409)
 - Added a 'replacement' parameter to the
   'twisted.python.deprecate.deprecated' decorator.  This allows
   deprecations to unambiguously specify what they have been
   deprecated in favor of. (#3047)
 - Added access methods to FilePath for FilePath.statinfo's st_ino,
   st_dev, st_nlink, st_uid, and st_gid fields.  This is in
   preparation for the deprecation of FilePath.statinfo. (#4712)
 - IPv4Address and UNIXAddress now have a __hash__ method. (#4783)
 - twisted.protocols.ftp.FTP.ftp_STOR now catches `FTPCmdError`s
   raised by the file writer, and returns the error back to the
   client. (#4909)

Bugfixes
--------
 - twistd will no longer fail if a non-root user passes --uid 'myuid'
   as a command-line argument. Instead, it will emit an error message.
   (#3172)
 - IOCPReactor now sends immediate completions to the main loop
   (#3233)
 - trial can now load test methods from multiple classes, even if the
   methods all happen to be inherited from the same base class.
   (#3383)
 - twisted.web.server will now produce a correct Allow header when a
   particular render_FOO method is missing. (#3678)
 - HEAD requests made to resources whose HEAD handling defaults to
   calling render_GET now always receive a response with no body.
   (#3684)
 - trial now loads decorated test methods whether or not the decorator
   preserves the original method name. (#3909)
 - t.p.amp.AmpBox.serialize will now correctly consistently complain
   when being fed Unicode. (#3931)
 - twisted.internet.wxreactor now supports stopping more reliably.
   (#3948)
 - reactor.spawnProcess on Windows can now handle ASCII-encodable
   Unicode strings in the system environment (#3964)
 - When C-extensions are not complied for twisted, on python2.4, skip
   a test in twisted.internet.test.test_process that may hang due to a
   SIGCHLD related problem. Running 'python setup.py build_ext
   --inplace' will compile the extension and cause the test to both
   run and pass. (#4331)
 - twisted.python.logfile.LogFile now raises a descriptive exception
   when passed a log  directoy which does not exist. (#4701)
 - Fixed a bug where Inotify will fail to add a filepatch to watchlist
   after it has been added/ignored previously. (#4708)
 - IPv4Address and UNIXAddress object comparison operators fixed
   (#4817)
 - twisted.internet.task.Clock now sorts the list of pending calls
   before and after processing each call (#4823)
 - ConnectionLost is now in twisted.internet.error.__all__ instead of
   twisted.words.protocols.jabber.xmlstream.__all__. (#4856)
 - twisted.internet.process now detects the most appropriate mechanism
   to use for detecting the open file descriptors on a system, getting
   Twisted working on FreeBSD even when fdescfs is not mounted.
   (#4881)
 - twisted.words.services referenced nonexistent
   twisted.words.protocols.irc.IRC_NOSUCHCHANNEL. This has been fixed.
   Related code has also received test cases. (#4915)

Improved Documentation
----------------------
 - The INSTALL file now lists all of Twisted's dependencies. (#967)
 - Added the stopService and startService methods to all finger
   example files. (#3375)
 - Missing reactor.run() calls were added in the UDP and client howto
   documents. (#3834)
 - The maxRetries attribute of
   twisted.internet.protocols.RetryingClientFactory now has API
   documentation. (#4618)
 - Lore docs pointed to a template that no longer existed, this has
   been fixed. (#4682)
 - The `servers` argument to `twisted.names.client.createResolver` now
   has more complete API documentation. (#4713)
 - Linked to the Twisted endpoints tutorial from the Twisted core
   howto list.  (#4773)
 - The Endpoints howto now links to the API documentation. (#4774)
 - The Quotes howto is now more clear in its PYTHONPATH setup
   instructions. (#4785)
 - The API documentation for DeferredList's fireOnOneCallback
   parameter now gives the correct order of the elements of the result
   tuple. (#4882)

Deprecations and Removals
-------------------------
 - returning a value other than None from IProtocol.dataReceived was
   deprecated (#2491)
 - Deprecated the --extra option in trial.  (#3372)
 - twisted.protocols._c_urlarg has been removed. (#4162)
 - Remove the --report-profile option for twistd, deprecated since
   2007. (#4236)
 - Deprecated twisted.persisted.journal.  This library is no longer
   maintained.  (#4298)
 - Removed twisted.protocols.loopback.loopback, which has been
   deprecated since Twisted 2.5. (#4547)
 - __getitem__ __getslice__ and __eq__ (tuple comparison, indexing)
   removed from twisted.internet.address.IPv4Address and
   twisted.internet.address.UNIXAddress classes UNIXAddress and
   IPv4Address properties _bwHack are now deprecated in
   twisted.internet.address (#4817)
 - twisted.python.reflect.allYourBase is now no longer used, replaced
   with inspect.getmro (#4928)
 - allYourBase and accumulateBases are now deprecated in favor of
   inspect.getmro. (#4946)

Other
-----
 - #555, #1982, #2618, #2665, #2666, #4035, #4247, #4567, #4636,
   #4717, #4733, #4750, #4821, #4842, #4846, #4853, #4857, #4858,
   #4863, #4864, #4865, #4866, #4867, #4868, #4869, #4870, #4871,
   #4872, #4873, #4874, #4875, #4876, #4877, #4878, #4879, #4905,
   #4906, #4908, #4934, #4955, #4960


Twisted Core 10.2.0 (2010-11-29)
================================

Features
--------
 - twisted.internet.cfreactor has been significantly improved.  It now
   runs, and passes, the test suite.  Many, many bugs in it have been
   fixed, including several segfaults, as it now uses PyObjC and
   longer requires C code in Twisted. (#1833)
 - twisted.protocols.ftp.FTPRealm now accepts a parameter to override
   "/home" as the container for user directories.  The new
   BaseFTPRealm class in the same module also allows easy
   implementation of custom user directory schemes. (#2179)
 - twisted.python.filepath.FilePath and twisted.python.zippath.ZipPath
   now have a descendant method to simplify code which calls the child
   method repeatedly. (#3169)
 - twisted.python.failure._Frame objects now support fake f_locals
   attribute. (#4045)
 - twisted.internet.endpoints now has 'serverFromString' and
   'clientFromString' APIs for constructing endpoints from descriptive
   strings. (#4473)
 - The default trial reporter now combines reporting of tests with the
   same result to shorten its summary output. (#4487)
 - The new class twisted.protocols.ftp.SystemFTPRealm implements an
   FTP realm which uses system accounts to select home directories.
   (#4494)
 - twisted.internet.reactor.spawnProcess now wastes less time trying
   to close non-existent file descriptors on POSIX platforms. (#4522)
 - twisted.internet.win32eventreactor now declares that it implements
   a new twisted.internet.interfaces.IReactorWin32Events interface.
   (#4523)
 - twisted.application.service.IProcess now documents its attributes
   using zope.interface.Attribute. (#4534)
 - twisted.application.app.ReactorSelectionMixin now saves the value
   of the --reactor option in the "reactor" key of the options object.
   (#4563)
 - twisted.internet.endpoints.serverFromString and clientFromString,
   and therefore also twisted.application.strports.service, now
   support plugins, so third parties may implement their own endpoint
   types. (#4695)

Bugfixes
--------
 - twisted.internet.defer.Deferred now handles chains iteratively
   instead of recursively, preventing RuntimeError due to excessive
   recursion when handling long Deferred chains. (#411)
 - twisted.internet.cfreactor now works with trial. (#2556)
 - twisted.enterprise.adbapi.ConnectionPool.close may now be called
   even if the connection pool has not yet been started.  This will
   prevent the pool from ever starting. (#2680)
 - twisted.protocols.basic.NetstringReceiver raises
   NetstringParseErrors for  invalid netstrings now. It handles empty
   netstrings ("0:,") correctly, and  the performance for receiving
   netstrings has been improved. (#4378)
 - reactor.listenUDP now returns an object which declares that it
   implements IListeningPort. (#4462)
 - twisted.python.randbytes no longer uses PyCrypto as a secure random
   number source (since it is not one). (#4468)
 - twisted.internet.main.installReactor now blocks installation of
   another reactor when using python -O (#4476)
 - twisted.python.deprecate.deprecatedModuleAttribute now emits only
   one warning when used to deprecate a package attribute which is a
   module. (#4492)
 - The "brief" mode of twisted.python.failure.Failure.getTraceback now
   handles exceptions raised by the underlying exception's __str__
   method. (#4501)
 - twisted.words.xish.domish now correctly parses XML with namespaces
   which include whitespace. (#4503)
 - twisted.names.authority.FileAuthority now generates correct
   negative caching hints, marks its referral NS RRs as non-
   authoritative, and correctly generates referrals for ALL_RECORDS
   requests. (#4513)
 - twisted.internet.test.reactormixins.ReactorBuilder's attribute
   `requiredInterface` (which should an interface) is now
   `requiredInterfaces` (a list of interfaces) as originally described
   per the documentation. (#4527)
 - twisted.python.zippath.ZipPath.__repr__ now correctly formats paths
   with ".." in them (by including it). (#4535)
 - twisted.names.hosts.searchFileFor has been fixed against
   refcounting dependency. (#4540)
 - The POSIX process transports now declare that they implement
   IProcessTransport. (#4585)
 - Twisted can now be built with the LLVM clang compiler, with
   'CC=clang python setup.py build'.  C code that caused errors with
   this compiler has been removed. (#4652)
 - trial now puts coverage data in the path specified by --temp-
   directory, even if that option comes after --coverage on the
   command line. (#4657)
 - The unregisterProducer method of connection-oriented transports
   will now cause the connection to be closed if there was a prior
   call to loseConnection. (#4719)
 - Fixed an issue where the new StreamServerEndpointService didn't log
   listen errors.  (This was a bug not present in any previous
   releases, as this class is new.) (#4731)

Improved Documentation
----------------------
 - The trial man page now documents the meaning of the final line of
   output of the default reporter. (#1384)
 - The API documentation for twisted.internet.defer.DeferredList now
   goes into more depth about the effects each of the __init__ flags
   that class accepts. (#3595)
 - There is now narrative documentation for the endpoints APIs, in the
   'endpoints' core howto, as well as modifications to the 'writing
   clients' and 'writing servers' core howto documents to indicate
   that endpoints are now the preferred style of listening and
   connecting. (#4478)
 - trial's man page now documents the --disablegc option in more
   detail. (#4511)
 - trial's coverage output format is now documented in the trial man
   page. (#4512)
 - Broken links and spelling errors in the finger tutorial are now
   fixed. (#4516)
 - twisted.internet.threads.blockingCallFromThread's docstring is now
   explicit about Deferred support. (#4517)
 - twisted.python.zippath.ZipPath.child now documents its handling of
   ".." (which is not special, making it different from
   FilePath.child). (#4535)
 - The API docs for twisted.internet.defer.Deferred now cover several
   more of its (less interesting) attributes. (#4538)
 - LineReceiver, NetstringReceiver, and IntNStringReceiver from
   twisted.protocols.basic now have improved API documentation for
   read callbacks and write methods. (#4542)
 - Tidied up the Twisted Conch documentation for easier conversion.
   (#4566)
 - Use correct Twisted version for when cancellation was introduced in
   the Deferred docstring. (#4614)
 - The logging howto is now more clear about how the standard library
   logging module and twisted.python.log can be integrated. (#4642)
 - The finger tutorial still had references to .tap files. This
   reference has now been removed. The documentation clarifies
   "finger.tap" is a module and not a filename. (#4679)
 - The finger tutorial had a broken link to the
   twisted.application.service.Service class, which is now fixed.
   Additionally, a minor typo ('verison') was fixed.  (#4681)
 - twisted.protocols.policies.TimeoutMixin now has clearer API
   documentation. (#4684)

Deprecations and Removals
-------------------------
 - twisted.internet.defer.Deferred.setTimeout has been removed, after
   being deprecated since Twisted 2.0. (#1702)
 - twisted.internet.interfaces.IReactorTime.cancelCallLater
   (deprecated since  2007) and
   twisted.internet.interfaces.base.ReactorBase.cancelCallLater
   (deprecated since 2002) have been removed. (#4076)
 - Removed twisted.cred.util.py, which has been deprecated since
   Twisted 8.3. (#4107)
 - twisted.python.text.docstringLStrip was deprecated. (#4328)
 - The module attributes `LENGTH`, `DATA`, `COMMA`, and `NUMBER` of
   twisted.protocols.basic (previously used by `NetstringReceiver`)
   are now deprecated. (#4541)
 - twisted.protocols.basic.SafeNetstringReceiver, deprecated since
   2001 (before Twisted 2.0), was removed. (#4546)
 - twisted.python.threadable.whenThreaded, deprecated since Twisted
   2.2.0, has been removed. (#4550)
 - twisted.python.timeoutqueue, deprecated since Twisted 8.0, has been
   removed. (#4551)
 - iocpreactor transports can no longer be pickled. (#4617)

Other
-----
 - #4300, #4475, #4477, #4504, #4556, #4562, #4564, #4569, #4608,
   #4616, #4617, #4626, #4630, #4650, #4705


Twisted Core 10.1.0 (2010-06-27)
================================

Features
--------
 - Add linux inotify support, allowing monitoring of file system
   events. (#972)
 - Deferreds now support cancellation. (#990)
 - Added new "endpoint" interfaces in twisted.internet.interfaces,
   which abstractly describe stream transport endpoints which can be
   listened on or connected to.  Implementations for TCP and SSL
   clients and servers are present in twisted.internet.endpoints.
   Notably, client endpoints' connect() methods return cancellable
   Deferreds, so code written to use them can bypass the awkward
   "ClientFactory.clientConnectionFailed" and
   "Connector.stopConnecting" methods, and handle errbacks from or
   cancel the returned deferred, respectively. (#1442)
 - twisted.protocols.amp.Integer's documentation now clarifies that
   integers of arbitrary size are supported and that the wire format
   is a base-10 representation. (#2650)
 - twisted.protocols.amp now includes support for transferring
   timestamps (amp.DateTime) and decimal values (amp.Decimal). (#2651)
 - twisted.protocol.ftp.IWriteFile now has a close() method, which can
   return a Deferred. Previously a STOR command would finish
   immediately upon the receipt of the last byte of the uploaded file.
   With close(), the backend can delay the finish until it has
   performed some other slow action (like storing the data to a
   virtual filesystem). (#3462)
 - FilePath now calls os.stat() only when new status information is
   required, rather than immediately when anything changes.  For some
   applications this may result in fewer stat() calls.  Additionally,
   FilePath has a new method, 'changed', which applications may use to
   indicate that the FilePath may have been changed on disk and
   therefore the next status information request must  fetch a new
   stat result.  This is useful if external systems, such as C
   libraries, may have changed files that Twisted applications are
   referencing via a FilePath. (#4130)
 - Documentation improvements are now summarized in the NEWS file.
   (#4224)
 - twisted.internet.task.deferLater now returns a cancellable
   Deferred. (#4318)
 - The connect methods of twisted.internet.protocol.ClientCreator now
   return cancellable Deferreds. (#4329)
 - twisted.spread.pb now has documentation covering some of its
   limitations. (#4402)
 - twisted.spread.jelly now supports jellying and unjellying classes
   defined with slots if they also implement __getstate__ and
   __setstate__. (#4430)
 - twisted.protocols.amp.ListOf arguments can now be specified as
   optional. (#4474)

Bugfixes
--------
 - On POSIX platforms, reactors now support child processes in a way
   which doesn't cause other syscalls to sometimes fail with EINTR (if
   running on Python 2.6 or if Twisted's extension modules have been
   built). (#733)
 - Substrings are escaped before being passed to a regular expression
   for searching to ensure that they don't get interpreted as part of
   the expression. (#1893)
 - twisted.internet.stdio now supports stdout being redirected to a
   normal file (except when using epollreactor). (#2259)
 -  (#2367)
 - The tap2rpm script now works with modern versions of RPM. (#3292)
 - twisted.python.modules.walkModules will now handle packages
   explicitly precluded from importing by a None placed in
   sys.modules. (#3419)
 - ConnectedDatagramPort now uses stopListening when a connection
   fails instead of the deprecated loseConnection. (#3425)
 - twisted.python.filepath.FilePath.setContent is now safe for
   multiple processes to use concurrently. (#3694)
 - The mode argument to the methods of
   twisted.internet.interfaces.IReactorUNIX is no longer deprecated.
   (#4078)
 - Do not include blacklisted projects when generating NEWS. (#4190)
 - When generating NEWS for a project that had no significant changes,
   include a section for that project and say that there were no
   interesting changes. (#4191)
 - Redundant 'b' mode is no longer passed to calls to FilePath.open
   and FilePath.open itself now corrects the mode when multiple 'b'
   characters are present, ensuring only one instance of 'b' is
   provided, as a workaround for http://bugs.python.org/issue7686.
   (#4207)
 - HTML tags inside <pre> tags in the code snippets are now escaped.
   (#4336)
 - twisted.protocols.amp.CommandLocator now allows subclasses to
   override responders inherited from base classes. (#4343)
 - Fix a bunch of small but important defects in the INSTALL, README
   and so forth. (#4346)
 - The poll, epoll, glib2, and gtk2 reactors now all support half-
   close in the twisted.internet.stdio.StandardIO transport. (#4352)
 - twisted.application.internet no longer generates an extra and
   invalid entry in its __all__ list for the nonexistent
   MulticastClient. (#4373)
 - Choosing a reactor documentation now says that only the select-
   based reactor is a truly cross-platform reactor. (#4384)
 - twisted.python.filepath.FilePath now no longer leaves files open,
   to be closed by the garbage collector, when an exception is raised
   in the implementation of setContent, getContent, or copyTo. (#4400)
 - twisted.test.proto_helpers.StringTransport's getHost and getPeer
   methods now return IPv4Address instances by default. (#4401)
 - twisted.protocols.amp.BinaryBoxProtocol will no longer deliver an
   empty string to a switched-to protocol's dataReceived method when
   the BinaryBoxProtocol's buffer happened to be empty at the time of
   the protocol switch. (#4405)
 - IReactorUNIX.listenUNIX implementations now support abstract
   namespace sockets on Linux. (#4421)
 - Files opened with FilePath.create() (and therefore also files
   opened via FilePath.open() on a path with alwaysCreate=True) will
   now be opened in binary mode as advertised, so that they will
   behave portably across platforms. (#4453)
 - The subunit reporter now correctly reports import errors as errors,
   rather than by crashing with an unrelated error. (#4496)

Improved Documentation
----------------------
 - The finger tutorial example which introduces services now avoids
   double-starting the loop to re-read its users file. (#4420)
 - twisted.internet.defer.Deferred.callback's docstring now mentions
   the implicit chaining feature. (#4439)
 - doc/core/howto/listing/pb/chatclient.py can now actually send a
   group message. (#4459)

Deprecations and Removals
-------------------------
 - twisted.internet.interfaces.IReactorArbitrary,
   twisted.application.internet.GenericServer, and
   twisted.application.internet.GenericClient are now deprecated.
   (#367)
 - twisted.internet.gtkreactor is now deprecated. (#2833)
 - twisted.trial.util.findObject has been deprecated. (#3108)
 - twisted.python.threadpool.ThreadSafeList is deprecated and Jython
   platform detection in Twisted core removed (#3725)
 - twisted.internet.interfaces.IUDPConnectedTransport has been removed
   (deprecated since Twisted 9.0). (#4077)
 - Removed twisted.application.app.runWithProfiler, which has been
   deprecated since Twisted 8.0. (#4090)
 - Removed twisted.application.app.runWithHotshot, which has been
   deprecated since Twisted 8.0. (#4091)
 - Removed twisted.application.app.ApplicationRunner.startLogging,
   which has been deprecated (doesn't say since when), as well as
   support for the legacy
   twisted.application.app.ApplicationRunner.getLogObserver method.
   (#4092)
 - twisted.application.app.reportProfile has been removed. (#4093)
 - twisted.application.app.getLogFile has been removed. (#4094)
 - Removed twisted.cred.util.py, which has been deprecated since
   Twisted 8.3. (#4107)
 - twisted.python.util.dsu is now deprecated. (#4339)
 - In twisted.trial.util: FailureError, DirtyReactorWarning,
   DirtyReactorError, and PendingTimedCallsError, which have all been
   deprecated since Twisted 8.0, have been removed. (#4505)

Other
-----
 - #1363, #1742, #3170, #3359, #3431, #3738, #4088, #4206, #4221,
   #4239, #4257, #4272, #4274, #4287, #4291, #4293, #4309, #4316,
   #4319, #4324, #4332, #4335, #4348, #4358, #4394, #4399, #4409,
   #4418, #4443, #4449, #4479, #4485, #4486, #4497


Twisted Core 10.0.0 (2010-03-01)
================================

Features
--------
 - The twistd man page now has a SIGNALS section. (#689)

 - reactor.spawnProcess now will not emit a PotentialZombieWarning
   when called before reactor.run, and there will be no potential for
   zombie processes in this case. (#2078)

 - High-throughput applications based on Perspective Broker should now
   run noticably faster thanks to the use of a more efficient decoding
   function in Twisted Spread. (#2310)

 - Documentation for trac-post-commit-hook functionality in svn-dev
   policy. (#3867)

 - twisted.protocols.socks.SOCKSv4 now supports the SOCKSv4a protocol.
   (#3886)

 - Trial can now output test results according to the subunit
   protocol, as long as Subunit is installed (see
   https://launchpad.net/subunit). (#4004)

 - twisted.protocols.amp now provides a ListOf argument type which can
   be composed with some other argument types to create a zero or more
   element sequence of that type. (#4116)

 - If returnValue is invoked outside of a function decorated with
   @inlineCallbacks, but causes a function thusly decorated to exit, a
   DeprecationWarning will be emitted explaining this potentially
   confusing behavior.  In a future release, this will cause an
   exception. (#4157)

 - twisted.python.logfile.BaseLogFile now has a reopen method allowing
   you to use an external logrotate mechanism. (#4255)

Bugfixes
--------
 - FTP.ftp_NLST now handles requests on invalid paths in a way
   consistent with RFC 959. (#1342)

 - twisted.python.util.initgroups now calls the low-level C initgroups
   by default if available: the python version can create lots of I/O
   with certain authentication setup to retrieve all the necessary
   information. (#3226)

 - startLogging now does nothing on subsequent invocations, thus
   fixing a terrible infinite recursion bug that's only on edge case.
   (#3289)

 - Stringify non-string data to NetstringReceiver.sendString before
   calculating the length so that the calculated length is equal to
   the actual length of the transported data. (#3299)

 - twisted.python.win32.cmdLineQuote now correctly quotes empty
   strings arguments (#3876)

 - Change the behavior of the Gtk2Reactor to register only one source
   watch for each file descriptor, instead of one for reading and one
   for writing. In particular, it fixes a bug with Glib under Windows
   where we failed to notify when a client is connected. (#3925)

 - Twisted Trial no longer crashes if it can't remove an old
   _trial_temp directory.  (#4020)

 - The optional _c_urlarg extension now handles unquote("") correctly
   on platforms where malloc(0) returns NULL, such as AIX.  It also
   compiles with less warnings. (#4142)

 - On POSIX, child processes created with reactor.spawnProcess will no
   longer automatically ignore the signals which the parent process
   has set to be ignored. (#4199)

 - All SOCKSv4a tests now use a dummy reactor with a deterministic
   resolve method. (#4275)

 - Prevent extraneous server, date and content-type headers in proxy
   responses. (#4277)

Deprecations and Removals
-------------------------
 - twisted.internet.error.PotentialZombieWarning is now deprecated.
   (#2078)

 - twisted.test.time_helpers is now deprecated. (#3719)

 - The deprecated connectUDP method of IReactorUDP has now been
   removed. (#4075)

 - twisted.trial.unittest.TestCase now ignores the previously
   deprecated setUpClass and tearDownClass methods. (#4175)

Other
-----
 - #917, #2406, #2481, #2608, #2689, #2884, #3056, #3082, #3199,
   #3480, #3592, #3718, #3935, #4066, #4083, #4154, #4166, #4169,
   #4176, #4183, #4186, #4188, #4189, #4194, #4201, #4204, #4209,
   #4222, #4234, #4235, #4238, #4240, #4245, #4251, #4264, #4268,
   #4269, #4282


Twisted Core 9.0.0 (2009-11-24)
===============================

Features
--------
 - LineReceiver.clearLineBuffer now returns the bytes that it cleared (#3573)
 - twisted.protocols.amp now raises InvalidSignature when bad arguments are
   passed to Command.makeArguments (#2808)
 - IArgumentType was added to represent an existing but previously unspecified
   interface in amp (#3468)
 - Obscure python tricks have been removed from the finger tutorials (#2110)
 - The digest auth implementations in twisted.web and twisted.protocolos.sip
   have been merged together in twisted.cred (#3575)
 - FilePath and ZipPath now has a parents() method which iterates up all of its
   parents (#3588)
 - reactors which support threads now have a getThreadPool method (#3591)
 - The MemCache client implementation now allows arguments to the "stats"
   command (#3661)
 - The MemCache client now has a getMultiple method which allows fetching of
   multiple values (#3171)
 - twisted.spread.jelly can now unserialize some new-style classes (#2950)
 - twisted.protocols.loopback.loopbackAsync now accepts a parameter to control
   the data passed between client and server (#3820)
 - The IOCP reactor now supports SSL (#593)
 - Tasks in a twisted.internet.task.Cooperator can now be paused, resumed, and
   cancelled (#2712)
 - AmpList arguments can now be made optional (#3891)
 - The syslog output observer now supports log levels (#3300)
 - LoopingCall now supports reporting the number of intervals missed if it
   isn't able to schedule calls fast enough (#3671)

Fixes
-----
 - The deprecated md5 and sha modules are no longer used if the stdlib hashlib
   module is available (#2763)
 - An obscure deadlock involving waking up the reactor within signal handlers
   in particular threads was fixed (#1997)
 - The passivePortRange attribute of FTPFactory is now honored (#3593)
 - TestCase.flushWarnings now flushes warnings even if they were produced by a
   file that was renamed since it was byte compiled (#3598)
 - Some internal file descriptors are now marked as close-on-exec, so these will
   no longer be leaked to child processes (#3576)
 - twisted.python.zipstream now correctly extracts the first file in a directory
   as a file, and not an empty directory (#3625)
 - proxyForInterface now returns classes which correctly *implement* interfaces
   rather than *providing* them (#3646)
 - SIP Via header parameters should now be correctly generated (#2194)
 - The Deferred returned by stopListening would sometimes previously never fire
   if an exception was raised by the underlying file descriptor's connectionLost
   method. Now the Deferred will fire with a failure (#3654)
 - The command-line tool "manhole" should now work with newer versions of pygtk
   (#2464)
 - When a DefaultOpenSSLContextFactory is instantiated with invalid parameters,
   it will now raise an exception immediately instead of waiting for the first
   connection (#3700)
 - Twisted command line scripts should now work when installed in a virtualenv
   (#3750)
 - Trial will no longer delete temp directories which it did not create (#3481)
 - Processes started on Windows should now be cleaned up properly in more cases
   (#3893)
 - Certain misbehaving importers will no longer cause twisted.python.modules
   (and thus trial) to raise an exception, but rather issue a warning (#3913)
 - MemCache client protocol methods will now fail when the transport has been
   disconnected (#3643)
 - In the AMP method callRemoteString, the requiresAnswer parameter is now
   honored (#3999)
 - Spawning a "script" (a file which starts with a #! line) on Windows running
   Python 2.6 will now work instead of raising an exception about file mode
   "ru" (#3567)
 - FilePath's walk method now calls its "descend" parameter even on the first
   level of children, instead of only on grandchildren. This allows for better
   symlink cycle detection (#3911)
 - Attempting to write unicode data to process pipes on Windows will no longer
   result in arbitrarily encoded messages being written to the pipe, but instead
   will immediately raise an error (#3930)
 - The various twisted command line utilities will no longer print
   ModuleType.__doc__ when Twisted was installed with setuptools (#4030)
 - A Failure object will now be passed to connectionLost on stdio connections
   on Windows, instead of an Exception object (#3922)

Deprecations and Removals
-------------------------
 - twisted.persisted.marmalade was deleted after a long period of deprecation
   (#876)
 - Some remaining references to the long-gone plugins.tml system were removed
   (#3246)
 - SSLv2 is now disabled by default, but it can be re-enabled explicitly
   (#3330)
 - twisted.python.plugin has been removed (#1911)
 - reactor.run will now raise a ReactorAlreadyRunning exception when it is
   called reentrantly instead of warning a DeprecationWarning (#1785)
 - twisted.spread.refpath is now deprecated because it is unmaintained,
   untested, and has dubious value (#3723)
 - The unused --quiet flag has been removed from the twistd command (#3003)

Other
-----
 - #3545, #3490, #3544, #3537, #3455, #3315, #2281, #3564, #3570, #3571, #3486,
   #3241, #3599, #3220, #1522, #3611, #3596, #3606, #3609, #3602, #3637, #3647,
   #3632, #3675, #3673, #3686, #2217, #3685, #3688, #2456, #506, #3635, #2153,
   #3581, #3708, #3714, #3717, #3698, #3747, #3704, #3707, #3713, #3720, #3692,
   #3376, #3652, #3695, #3735, #3786, #3783, #3699, #3340, #3810, #3822, #3817,
   #3791, #3859, #2459, #3677, #3883, #3894, #3861, #3822, #3852, #3875, #2722,
   #3768, #3914, #3885, #2719, #3905, #3942, #2820, #3990, #3954, #1627, #2326,
   #2972, #3253, #3937, #4058, #1200, #3639, #4079, #4063, #4050


Core 8.2.0 (2008-12-16)
=======================

Features
--------
 - Reactors are slowly but surely becoming more isolated, thus improving
   testability (#3198)
 - FilePath has gained a realpath method, and FilePath.walk no longer infinitely
   recurses in the case of a symlink causing a self-recursing filesystem tree
   (#3098)
 - FilePath's moveTo and copyTo methods now have an option to disable following
   of symlinks (#3105)
 - Private APIs are now included in the API documentation (#3268)
 - hotshot is now the default profiler for the twistd --profile parameter and
   using cProfile is now documented (#3355, #3356)
 - Process protocols can now implement a processExited method, which is
   distinct from processEnded in that it is called immediately when the child
   has died, instead of waiting for all the file descriptors to be closed
   (#1291)
 - twistd now has a --umask option (#966, #3024)
 - A new deferToThreadPool function exists in twisted.internet.threads (#2845)
 - There is now an example of writing an FTP server in examples/ftpserver.py
   (#1579)
 - A new runAsEffectiveUser function has been added to twisted.python.util
   (#2607)
 - twisted.internet.utils.getProcessOutput now offers a mechanism for
   waiting for the process to actually end, in the event of data received on
   stderr (#3239)
 - A fullyQualifiedName function has been added to twisted.python.reflect
   (#3254)
 - strports now defaults to managing access to a UNIX socket with a lock;
   lockfile=0 can be included in the strports specifier to disable this
   behavior (#2295)
 - FTPClient now has a 'rename' method (#3335)
 - FTPClient now has a 'makeDirectory' method (#3500)
 - FTPClient now has a 'removeFile' method (#3491)
 - flushWarnings, A new Trial method for testing warnings, has been added
   (#3487, #3427, #3506)
 - The log observer can now be configured in .tac files (#3534)

Fixes
-----
 - TLS Session Tickets are now disabled by default, allowing connections to
   certain servers which hang when an empty session ticket is received (like 
   GTalk) (#3463)
 - twisted.enterprise.adbapi.ConnectionPool's noisy attribute now defaults to
   False, as documented (#1806)
 - Error handling and logging in adbapi is now much improved (#3244)
 - TCP listeners can now be restarted (#2913)
 - Doctests can now be rerun with trial's --until-failure option (#2713)
 - Some memory leaks have been fixed in trial's --until-failure
   implementation (#3119, #3269)
 - Trial's summary reporter now prints correct runtime information and handles
   the case of 0 tests (#3184)
 - Trial and any other user of the 'namedAny' function now has better error
   reporting in the case of invalid module names (#3259)
 - Multiple instances of trial can now run in parallel in the same directory
   by creating _trial_temp directories with an incremental suffix (#2338)
 - Trial's failUnlessWarns method now works on Python 2.6 (#3223)
 - twisted.python.log now hooks into the warnings system in a way compatible
   with Python 2.6 (#3211)
 - The GTK2 reactor is now better supported on Windows, but still not passing
   the entire test suite (#3203)
 - low-level failure handling in spawnProcess has been improved and no longer
   leaks file descriptors (#2305, #1410)
 - Perspective Broker avatars now have their logout functions called in more
   cases (#392)
 - Log observers which raise exceptions are no longer removed (#1069)
 - transport.getPeer now always includes an IP address in the Address returned
   instead of a hostname (#3059)
 - Functions in twisted.internet.utils which spawn processes now avoid calling
   chdir in the case where no working directory is passed, to avoid some
   obscure permission errors (#3159)
 - twisted.spread.publish.Publishable no longer corrupts line endings on
   Windows (#2327)
 - SelectReactor now properly detects when a TLS/TCP connection has been
   disconnected (#3218)
 - twisted.python.lockfile no longer raises an EEXIST OSError and is much
   better supported on Windows (#3367)
 - When ITLSTransport.startTLS is called while there is data in the write
   buffer, TLS negotiation will now be delayed instead of the method raising
   an exception (#686)
 - The userAnonymous argument to FTPFactory is now honored (#3390)
 - twisted.python.modules no longer tries to "fix" sys.modules after an import
   error, which was just causing problems (#3388)
 - setup.py no longer attempts to build extension modules when run with Jython
   (#3410)
 - AMP boxes can now be sent in IBoxReceiver.startReceivingBoxes (#3477)
 - AMP connections are closed as soon as a key length larger than 255 is
   received (#3478)
 - Log events with timezone offsets between -1 and -59 minutes are now
   correctly reported as negative (#3515)

Deprecations and Removals
-------------------------
 - Trial's setUpClass and tearDownClass methods are now deprecated (#2903)
 - problemsFromTransport has been removed in favor of the argument passed to
   connectionLost (#2874)
 - The mode parameter to methods of IReactorUNIX and IReactorUNIXDatagram are
   deprecated in favor of applications taking other security precautions, since
   the mode of a Unix socket is often not respected (#1068)
 - Index access on instances of twisted.internet.defer.FirstError has been
   removed in favor of the subFailure attribute (#3298)
 - The 'changeDirectory' method of FTPClient has been deprecated in favor of
   the 'cwd' method (#3491)

Other
-----

 - #3202, #2869, #3225, #2955, #3237, #3196, #2355, #2881, #3054, #2374, #2918,
   #3210, #3052, #3267, #3288, #2985, #3295, #3297, #2512, #3302, #1222, #2631,
   #3306, #3116, #3215, #1489, #3319, #3320, #3321, #1255, #2169, #3182, #3323,
   #3301, #3318, #3029, #3338, #3346, #1144, #3173, #3165, #685, #3357, #2582,
   #3370, #2438, #1253, #637, #1971, #2208, #979, #1790, #1888, #1882, #1793,
   #754, #1890, #1931, #1246, #1025, #3177, #2496, #2567, #3400, #2213, #2027,
   #3415, #1262, #3422, #2500, #3414, #3045, #3111, #2974, #2947, #3222, #2878,
   #3402, #2909, #3423, #1328, #1852, #3382, #3393, #2029, #3489, #1853, #2026,
   #2375, #3502, #3482, #3504, #3505, #3507, #2605, #3519, #3520, #3121, #3484,
   #3439, #3216, #3511, #3524, #3521, #3197, #2486, #2449, #2748, #3381, #3236,
   #671


8.1.0 (2008-05-18)
==================

Features
--------

 - twisted.internet.error.ConnectionClosed is a new exception which is the
   superclass of ConnectionLost and ConnectionDone (#3137)
 - Trial's CPU and memory performance should be better now (#3034)
 - twisted.python.filepath.FilePath now has a chmod method (#3124)

Fixes
-----

 - Some reactor re-entrancy regressions were fixed (#3146, #3168)
 - A regression was fixed whereby constructing a Failure for an exception and
   traceback raised out of a Pyrex extension would fail (#3132)
 - CopyableFailures in PB can again be created from CopiedFailures (#3174)
 - FilePath.remove, when called on a FilePath representing a symlink to a
   directory, no longer removes the contents of the targeted directory, and
   instead removes the symlink (#3097)
 - FilePath now has a linkTo method for creating new symlinks (#3122)
 - The docstring for Trial's addCleanup method now correctly specifies when
   cleanup functions are run (#3131)
 - assertWarns now deals better with multiple identical warnings (#2904)
 - Various windows installer bugs were fixed (#3115, #3144, #3150, #3151, #3164)
 - API links in the howto documentation have been corrected (#3130)
 - The Win32 Process transport object now has a pid attribute (#1836)
 - A doc bug in the twistd plugin howto which would inevitably lead to
   confusion was fixed (#3183)
 - A regression breaking IOCP introduced after the last release was fixed
   (#3200)


Deprecations and Removals
-------------------------

 - mktap is now fully deprecated, and will emit DeprecationWarnings when used
   (#3127)

Other
-----
 - #3079, #3118, #3120, #3145, #3069, #3149, #3186, #3208, #2762


8.0.1 (2008-03-26)
==================

Fixes
-----
 - README no longer refers to obsolete trial command line option
 - twistd no longer causes a bizarre DeprecationWarning about mktap


8.0.0 (2008-03-17)
==================

Features
--------

 - The IOCP reactor has had many changes and is now greatly improved
   (#1760, #3055)
 - The main Twisted distribution is now easy_installable (#1286, #3110)
 - twistd can now profile with cProfile (#2469)
 - twisted.internet.defer contains a DeferredFilesystemLock which gives a
   Deferred interface to lock file acquisition (#2180)
 - twisted.python.modules is a new system for representing and manipulating
   module paths (i.e. sys.path) (#1951)
 - twisted.internet.fdesc now contains a writeToFD function, along with other
   minor fixes (#2419)
 - twisted.python.usage now allows optional type enforcement (#739)
 - The reactor now has a blockingCallFromThread method for non-reactor threads
   to use to wait for a reactor-scheduled call to return a result (#1042, #3030)
 - Exceptions raised inside of inlineCallbacks-using functions now have a
   better chance of coming with a meaningful traceback (#2639, #2803)
 - twisted.python.randbytes now contains code for generating secure random
   bytes (#2685)
 - The classes in twisted.application.internet now accept a reactor parameter
   for specifying the reactor to use for underlying calls to allow for better
   testability (#2937)
 - LoopingCall now allows you to specify the reactor to use to schedule new
   calls, allowing much better testing techniques (#2633, #2634)
 - twisted.internet.task.deferLater is a new API for scheduling calls and
   getting deferreds which are fired with their results (#1875)
 - objgrep now knows how to search through deque objects (#2323)
 - twisted.python.log now contains a Twisted log observer which can forward
   messages to the Python logging system (#1351)
 - Log files now include seconds in the timestamps (#867)
 - It is now possible to limit the number of log files to create during log
   rotation (#1095)
 - The interface required by the log context system is now documented as
   ILoggingContext, and abstract.FileDescriptor now declares that it implements
   it (#1272)
 - There is now an example cred checker that uses a database via adbapi (#460)
 - The epoll reactor is now documented in the choosing-reactors howto (#2539)
 - There were improvements to the client howto (#222)
 - Int8Receiver was added (#2315)
 - Various refactorings to AMP introduced better testability and public
   interfaces (#2657, #2667, #2656, #2664, #2810)
 - twisted.protocol.policies.TrafficLoggingFactory now has a resetCounter
   method (#2757)
 - The FTP client can be told which port range within which to bind passive
   transfer ports (#1904)
 - twisted.protocols.memcache contains a new asynchronous memcache client
   (#2506, #2957)
 - PB now supports anonymous login (#439, #2312)
 - twisted.spread.jelly now supports decimal objects (#2920)
 - twisted.spread.jelly now supports all forms of sets (#2958)
 - There is now an interface describing the API that process protocols must
   provide (#3020)
 - Trial reporting to core unittest TestResult objects has been improved (#2495)
 - Trial's TestCase now has an addCleanup method which allows easy setup of
   tear-down code (#2610, #2899)
 - Trial's TestCase now has an assertIsInstance method (#2749)
 - Trial's memory footprint and speed are greatly improved (#2275)
 - At the end of trial runs, "PASSED" and "FAILED" messages are now colorized
   (#2856)
 - Tests which leave global state around in the reactor will now fail in
   trial. A new option, --unclean-warnings, will convert these errors back into
   warnings (#2091)
 - Trial now has a --without-module command line for testing code in an
   environment that lacks a particular Python module (#1795)
 - Error reporting of failed assertEquals assertions now has much nicer
   formatting (#2893)
 - Trial now has methods for monkey-patching (#2598)
 - Trial now has an ITestCase (#2898, #1950)
 - The trial reporter API now has a 'done' method which is called at the end of
   a test run (#2883)
 - TestCase now has an assertWarns method which allows testing that functions
   emit warnings (#2626, #2703)
 - There are now no string exceptions in the entire Twisted code base (#2063)
 - There is now a system for specifying credentials checkers with a string
   (#2570)

Fixes
-----

 - Some tests which were asserting the value of stderr have been changed
   because Python uncontrollably writes bytes to stderr (#2405)
 - Log files handle time zones with DST better (#2404)
 - Subprocesses using PTYs on OS X that are handled by Twisted will now be able
   to more reliably write the final bytes before they exit, allowing Twisted
   code to more reliably receive them (#2371, #2858)
 - Trial unit test reporting has been improved (#1901)
 - The kqueue reactor handles connection failures better (#2172)
 - It's now possible to run "trial foo/bar/" without an exception: trailing
   slashes no longer cause problems (#2005)
 - cred portals now better deal with implementations of inherited interfaces
   (#2523)
 - FTP error handling has been improved (#1160, 1107)
 - Trial behaves better with respect to file locking on Windows (#2482)
 - The FTP server now gives a better error when STOR is attempted during an
   anonymous session (#1575)
 - Trial now behaves better with tests that use the reactor's threadpool (#1832)
 - twisted.python.reload now behaves better with new-style objects (#2297)
 - LogFile's defaultMode parameter is now better implemented, preventing
   potential security exploits (#2586)
 - A minor obscure leak in thread pools was corrected (#1134)
 - twisted.internet.task.Clock now returns the correct DelayedCall from
   callLater, instead of returning the one scheduled for the furthest in the
   future (#2691)
 - twisted.spread.util.FilePager no longer unnecessarily buffers data in
   memory (#1843, 2321)
 - Asking for twistd or trial to use an unavailable reactor no longer prints a
   traceback (#2457)
 - System event triggers have fewer obscure bugs (#2509)
 - Plugin discovery code is much better behaved, allowing multiple
   installations of a package with plugins (#2339, #2769)
 - Process and PTYProcess have been merged and some minor bugs have been fixed
   (#2341)
 - The reactor has less global state (#2545)
 - Failure can now correctly represent and format errors caused by string
   exceptions (#2830)
 - The epoll reactor now has better error handling which now avoids the bug
   causing 100% CPU usage in some cases (#2809)
 - Errors raised during trial setUp or tearDown methods are now handled better
   (#2837)
 - A problem when deferred callbacks add new callbacks to the deferred that
   they are a callback of was fixed (#2849)
 - Log messages that are emitted during connectionMade now have the protocol
   prefix correctly set (#2813)
 - The string representation of a TCP Server connection now contains the actual
   port that it's bound to when it was configured to listen on port 0 (#2826)
 - There is better reporting of error codes for TCP failures on Windows (#2425)
 - Process spawning has been made slightly more robust by disabling garbage
   collection temporarily immediately after forking so that finalizers cannot
   be executed in an unexpected environment (#2483)
 - namedAny now detects import errors better (#698)
 - Many fixes and improvements to the twisted.python.zipstream module have
   been made (#2996)
 - FilePager no longer blows up on empty files (#3023)
 - twisted.python.util.FancyEqMixin has been improved to cooperate with objects
   of other types (#2944)
 - twisted.python.FilePath.exists now restats to prevent incorrect result
   (#2896)
 - twisted.python.util.mergeFunctionMetadata now also merges the __module__
   attribute (#3049)
 - It is now possible to call transport.pauseProducing within connectionMade on
   TCP transports without it being ignored (#1780)
 - twisted.python.versions now understands new SVN metadata format for fetching
   the SVN revision number (#3058)
 - It's now possible to use reactor.callWhenRunning(reactor.stop) on gtk2 and
   glib2 reactors (#3011)

Deprecations and removals
-------------------------
 - twisted.python.timeoutqueue is now deprecated (#2536)
 - twisted.enterprise.row and twisted.enterprise.reflector are now deprecated
   (#2387)
 - twisted.enterprise.util is now deprecated (#3022)
 - The dispatch and dispatchWithCallback methods of ThreadPool are now
   deprecated (#2684)
 - Starting the same reactor multiple times is now deprecated (#1785)
 - The visit method of various test classes in trial has been deprecated (#2897)
 - The --report-profile option to twistd and twisted.python.dxprofile are
   deprecated (#2908)
 - The upDownError method of Trial reporters is deprecated (#2883)

Other
-----

 - #2396, #2211, #1921, #2378, #2247, #1603, #2463, #2530, #2426, #2356, #2574,
 - #1844, #2575, #2655, #2640, #2670, #2688, #2543, #2743, #2744, #2745, #2746,
 - #2742, #2741, #1730, #2831, #2216, #1192, #2848, #2767, #1220, #2727, #2643,
 - #2669, #2866, #2867, #1879, #2766, #2855, #2547, #2857, #2862, #1264, #2735,
 - #942, #2885, #2739, #2901, #2928, #2954, #2906, #2925, #2942, #2894, #2793,
 - #2761, #2977, #2968, #2895, #3000, #2990, #2919, #2969, #2921, #3005, #421,
 - #3031, #2940, #1181, #2783, #1049, #3053, #2847, #2941, #2876, #2886, #3086,
 - #3095, #3109


2.5.0 (2006-12-29)
==================

Twisted 2.5.0 is a major feature release, with several interesting new
developments and a great number of bug fixes. Some of the highlights
follow.

 * AMP, the Asynchronous Messaging Protocol, was introduced.  AMP is
   a protocol which provides request/response semantics over a
   persistent connection in a very simple and extensible manner.

 * An Epoll-based reactor was added, which can be used with twistd or
   trial by passing "-r epoll" on the command line. This may improve
   performance of certain high-traffic network applications.

 * The 'twistd' command can now accept sub-commands which name an
   application to run. For example, 'twistd web --path .' will start a
   web server serving files out of the current directory. This
   functionality is meant to replace the old way of doing things with
   'mktap' and 'twistd -f'.

 * Python 2.5 is now supported. Previous releases of Twisted were
   broken by changes in the release of Python 2.5.

 * 'inlineCallbacks' was added, which allows taking advantage of the
   new 'yield' expression syntax in Python 2.5 to avoid writing
   callbacks for Deferreds.

In addition to these changes, there are many other minor features and
a large number of bug fixes.

Features
--------
 - log.err can now take a second argument for specifying information
   about an error (#1399)
 - A time-simulating test helper class, twisted.internet.task.Clock,
   was added (#1757)
 - Trial docstring improvements were made (#1604, #2133)
 - New SSL features were added to twisted.internet.ssl, such as client
   validation (#302)
 - Python 2.5 is now supported (#1867)
 - Trial's assertFailure now provides more information on failure (#1869)
 - Trial can now be run on tests within a zipfile (#1940)
 - AMP, a new simple protocol for asynchronous messaging, was added (#1715)
 - Trial's colorful reporter now works on win32 (#1646)
 - Trial test modules may now dynamically construct TestSuites (#1638, #2165)
 - twistd can now make use of plugins to run applications (#1922, #2013)
 - Twisted now works with the latest (unreleased) zope.interface (#2160)
 - An epoll-based reactor, epollreactor, was added. It is selectable
   with the -r options to twistd and trial (#1953)
 - twistd and trial now use the plugin system to find reactors which
   can be selected (#719)
 - twisted.internet.defer.inlineCallbacks was added. It takes
   advantage of Python 2.5's generators to offer a way to deal with
   Deferreds without callbacks (#2100)

Fixes
-----
 - Traceback formatting in Trial was improved (#1454, #1610)
 - twisted.python.filepath.FilePath.islink now actually returns True when
   appropriate (#1773)
 - twisted.plugin now no longer raises spurious errors (#926)
 - twisted.pb Cacheables may now be new-style classes (#1324)
 - FileDescriptor now deals with producers in a more
   interface-compliant and robust manner (#2286, #811)
 - "setup.py build" and other setup.py commands which don't actually
   install the software now work (#1835)
 - wxreactor has had various fixes (#1235, #1574, #1688)

Deprecations and Removals
-------------------------
 - The old twisted.cred API (Perspectives, Identities and such) was
   removed (#1440)
 - twisted.spread.newjelly was removed (#1831)
 - Various deprecated things in twisted.python.components were
   removed: Interface, MetaInterface, getAdapterClass, and
   getAdapterClassWithInheritance (#1636)
 - twisted.enterprise.xmlreflector was removed (#661)
 - mktap is slowly on its way out, now that twistd supports plugins. It
   is not yet officially deprecated (#2013)
 - tkmktap was removed, because it wasn't working anyway (#2020)
 - reactor.iterate calls made inside of a Trial test case are
   deprecated (#2090)
 - twisted.internet.qtreactor was removed: It has been moved to a
   separate project. See http://twistedmatrix.com/trac/wiki/QTReactor
   (#2130, #2137)
 - threadedselectreactor is now not a directly usable reactor; it is
   only meant to help in writing other reactors (#2126)
 - twisted.python.reflect.funcinfo is deprecated (#2079)
 - twisted.spread.sturdy, which was already completely broken, was
   removed (#2299)


Other
-----
The following changes are minor or closely related to other changes.

 - #1783, #1786, #1788, #1648, #1734, #1609, #1800, #1818,
   #1629, #1829, #491, #1816, #1824, #1855, #1797, #1637, #1371,
   #1892, #1887, #1897, #1563, #1741, #1943, #1952, #1276,
   #1837, #1726, #1963, #1965, #1973, #1976, #1991, #1936, #1113,
   #630, #2002, #2040, #2044, #1617, #2045, #2055, #2056, #2022,
   #2052, #1552, #1999, #1507, #2054, #1970, #1968, #662, #1910,
   #1694, #1999, #1409, #2150, #2127, #2155, #1983, #2014, #2222,
   #1067, #2136, #2065, #1430, #2173, #2212, #1871, #2147, #1199,
   #2273, #428, #992, #815, #2024, #2292, #2125, #2139, #2291, #2174,
   #2306, #2228, #2309, #2319, #2317, #2313, #2154, #1985, #1201


2.4.0 (2006-05-21)
==================

Features
--------
 - twisted.internet.task.Cooperator (Added along with #1701).

Fixes
-----
 - Errors in UDP protocols no longer unbind the UDP port (#1695).
 - Misc: #1717, #1705, #1563, #1719, #1721, #1722, #1728.


2.3.0 (2006-05-14)
==================

Features
--------
 - twisted-dev-mode's F9 now uses trial's --testmodule feature, rather than
   trying to guess what tests to run.  This will break files using the "-x"
   test-case-name hack (just use a comma separated list instead).
 - API Documentation improvements.
 - A new Producer/Consumer guide (#53)
 - Better-defined error behavior in IReactorMulticast (#1578)
 - IOCP Multicast support (#1500)
 - Improved STDIO support on Windows. (#1553)
 - LoopingCall supports Deferreds such that it will wait until a
   Deferred has fired before rescheduling the next call (#1487)
 - Added twisted.python.versions.Version, a structured representation
   of Version information, including support for SVN revision numbers
   (#1663)

Fixes
-----

 - Many trial fixes, as usual 
 - All API documentation is now correctly formatted as epytext (#1545)
 - twisted.python.filepath.FilePath.__repr__ is safer.
 - Fix trial's "until-failure" mode. (#1453)
 - deferredGenerator now no longer causes handled exceptions (or
   results) to propagate to the resulting Deferred (#1709).
 - Misc: #1483, #1495, #1503, #1532, #1539, #1559, #1509, #1538,
   #1571, #1331, #1561, #737, #1562, #1573, #1594, #1607, #1407, #1615,
   #1645, #1634, #1620, #1664, #1666, #1650, #1670, #1675, #1692, #1710,
   #1668.

Deprecations
------------

 - Removal of already-deprecated trial APIs: the assertions module,
   util.deferredResult, util.deferredError, util.fireWhenDoneFunc,
   util.spinUntil, util.spinWhile, util.extract_tb,
   util.format_exception, util.suppress_warnings, unittest.wait,
   util.wait
 - The backwards compatibility layer of twisted.python.components
   (e.g., backwardsCompatImplements, fixClassImplements, etc) has been
   disabled. The functions still exist, but do nothing as to not break
   user code outright (#1511)
 - Deprecate the usage of the 'default' argument as a keyword argument
   in Interface.__call__. Passing a second positional argument to
   specify the default return value of the adaptation is still
   supported.


2.2.0 (2006-02-12)
==================

Features
--------
 - Twisted no longer works with Python 2.2
 - FTP server supports more clients
 - Process support on Windows
 - twisted.internet.stdio improved (including Windows support!)
 - Trial:
   - Continued Trial refactoring
   - Default trial reporter is verbose black&white when color isn't supported
   - Deferreds returned in trial tests that don't fire before the
     unittest timeout now have their errback fired with a TimeoutError
   - raising SkipTest in setUp and setUpClass skips tests
   - Test suites are failed if there are import errors

Fixes
-----
 - iocpreactor fixes
 - Threadpool fixes
 - Fixed infinite loops in datagramReceived edge cases
 - Issues resolved: 654, 773, 998, 1005, 1008, 1116, 1123, 1198, 1221,
   1232, 1233, 1236, 1240, 1244, 1258, 1263, 1265, 1266, 1271, 1275,
   1293, 1294, 1298, 1308, 1316, 1317, 1321, 1341, 1344, 1353, 1359,
   1372, 1374, 1377, 1379, 1380, 1385, 1388, 1389, 1413, 1422, 1426,
   1434, 1435, 1448, 1449, 1456

Deprecations
------------
 - Trial:
   - spinWhile and spinUntil
   - util.wait
   - extract_tb and format_exception
   - util.suppressWarnings
   - runReactor is gone


2.1.0 (2005-11-06)
==================

Features
--------
 - threadedselectreactor, a reactor which potentially makes
   integration with foreign event loops much simpler.
 - major improvements to twisted.conch.insults, including many new widgets.
 - adbapi ConnectionPools now have 'runWithConnection' which is
   similar to runInteraction but gives you a connection object instead of
   a transaction. [975]
 - __file__ is now usable in tac files
 - twisted.cred.pamauth now contains a PAM checker (moved from twisted.conch)
 - twisted.protocols.policies.LimitTotalConnectionsFactory now exists,
   which does as the name suggests
 - twisted.protocols.ident now uses /proc/net/tcp on Linux [233]
 - trial now recurses packages by default (a la the old -R parameter)
 - (PB) Calling a remote method that doesn't exist now raises
   NoSuchMethod instead of AttributeError.

Fixes
-----
 - FTP client and server improvements
 - Trial improvements: The code is now much simpler, and more stable.
 - twisted.protocols.basic.FileSender now works with empty files 
 - Twisted should now be much more usable on Pythons without thread support.
 - minor improvements to process code in win32eventreactor
 - twistd -y (--python) now implies -o (--nosave). [539]
 - improved lockfile handling especially with respect to unix sockets.
 - deferredGenerator now no longer overuses the stack, which sometimes
   caused stack overflows.
 - Failure.raiseException now at least always raises the correct Exception.
 - minor improvements to serialport code

Deprecations
------------
 - twisted.python.componts.getAdapter. Use IFoo(o) instead.
 - Adapter persistence (IFoo(x, persist=True)). Just don't use it.
 - log.debug. It was equivalent to log.msg(), just use that.
 - twisted.protocols.telnet. twisted.conch.telnet replaces it.
 - Setting a trial reporter using a flag to 'trial'. Instead of 'trial
   --bwverbose', for example, use 'trial --reporter=bwverbose'.
 - trial --coverage will become a flag in Twisted 2.2.
 - passing a fully-qualified python name to --reporter is
   deprecated. Pass only names of Reporter plugins.
 - trial --psyco.
 - trial -R (--recurse) is now the default, so passing it is deprecated.
 - trial --reporter-args. Use the plugin system to do this sort of thing.
 - trial.assertions.assertionMethod and trial.unittest.assertionMethod
   are both deprecated. Use instance methods on TestCases instead.
 - trial's deferredResult, deferredError, and wait functions. Return
   Deferreds from your test methods instead of using them.
 - Raising unittest.SkipTest with no arguments. Give a reason for your skip.
 - The Failure returned from a gatherResults and DeferredList is now
   of type FirstError instead of a tuple of (Exception, index). It
   supports a firstError[idx] syntax but that is deprecated. Use
   firstError.subFailure and firstError.index instead.
 - whenThreaded now simply calls the passed function synchronously.

2.0.1 (2005-05-09)
===================
Minor bug fix release.

SVN rev (file) - [bug number] description
-----------------------------------------
13307 (twisted/topfiles/README) - Mention support for python 2.4, too
13324 (twisted/internet/defer.py) - [947] Fix DeferredQueue backlog/size limit.
13354 (twisted/plugins/__init__.py) - Correct maintainer address.
13355 (twisted/test/test_defer.py) - improvements to DeferredQueue test case
13387 (setup.py) - add news to list of subprojects to install
13332 (twisted/internet/posixbase.py) - Fix spelling error
13366 (twisted/internet/qtreactor.py) - [957] [954] reactor.iterate fixes
13368 (twisted/test/test_internet.py) - Fix DelayedCall test case
13422 (twisted/internet/posixbase.py) - Remove log from _Win32Waker creation.
13437 (twisted/plugin.py) - [958] Only write cache if there were changes.
13666 (twisted/internet/gtkreactor.py,gtk2reactor.py) - Don't run callbacks
          until the reactor is actually up and running
13748 (twisted/internet/gtk2reactor.py) - [552] [994] Initialize threading properly.


2.0.0 (2005-03-25)
==================

Major new features
------------------
 - Replaced home-grown components system with zope.interface.
 - Split Twisted into multiple pieces.
 - Relicensed: Now under the MIT license, rather than LGPL.
 - Python 2.4 compatibility fixes
 - Major efficiency improvements in TCP buffering algorithm.
 - Major efficiency improvements in reactor.callLater/DelayedCall.
 - Half-close support for TCP/SSL. (loseWriteConnection).

Miscellaneous features/fixes
----------------------------
 - New plugin system: twisted.plugin
 - Better debugging support. Control-C will break you into PDB.
 - The twistd command has --uid --gid command line arguments.
 - *Incompatibility: mktap defaults to not change UID/GID, instead of saving
   the invoking user's UID/GID.
 - Removed some functions that were deprecated since Twisted 1.0.
 - ZSH tab-completion for twisted commands.

 - More correct daemonization in twistd.
 - twisted.python.log: do not close the log because of invalid format string.
 - Disabled automatic import of cBanana. 
 - Boolean support for twisted.persisted.marmalade.
 - Refactor of plugin and application HOWTO documentation
 - Async HOWTO expanded greatly.
 - twisted.python.usage outputs the actual defaults, not passed in values.

twisted.trial
-------------
 - Rewritten, a bunch of bugs fixed, a few more added.

twisted.internet
----------------
 - Multi-listen UDP multicast support
 - protocol.ClientCreator has a connectSSL.
 - defer.deferredGenerator: allows you to write Deferred code w/o callbacks.
 - Deferred.setTimeout is now deprecated.
 - New defer.DeferredLock/DeferredSemaphore/DeferredQueue.
 - Add utils.getProcessOutputAndValue to get stdout/err/value.

 - Default DNS resolver is now non-blocking.
 - Increased default TCP accept backlog from 5 to 50.
 - Make buffering large amounts of TCP data work on Windows.
 - Fixed SSL disconnect to not wait for remote host. Fixes issue with firefox.
 - Separate state for Deferred finalization so that GC-loops preventing
   finalization don't occur.
 - Many Process bugfixes
 - Processes spawned on windows can successfully use sockets
 - gtk2reactor can optionally use glib event loop instead of gtk
 - gtk2reactor notifies gobject to initialize thread support
 - Fix registering a streaming producer on a transport.
 - Close client sockets explicitly after failed connections.
 - ReconnectingClientFactory now continues attempting to reconnect after all
   errors, not just those which are not UserErrors.

twisted.protocols
-----------------
 - Portforward doesn't start reading from a client until a connection is made.
 - Bugfixes in twisted.protocols.loopback
 - Improve speed of twisted.protocols.LineReceiver.
 - LineReceiver implements IProducer. (stop/pause/resumeProducing)
 - SOCKSv4 properly closes connections

twisted.enterprise
------------------
 - Add "new connection" callback to adbapi.ConnectionPool to allow for
   custom db connection setup (cp_openfun)
 - adbapi.ConnectionPool automatic reconnection support
 - Don't log exceptions extraneously


1.3.0 (2004-05-14)
==================

- Address objects for IPv4 and Unix addresses throughout twisted.internet.
- Improved connected UDP APIs.
- Refactored SSH client support.
- Initial implementation of Windows I/O Completion Ports event loop.
- Bug fixes and feature enhancements.
- Nevow support for Lore (so your Lore documents can use Nevow directives).
- This is the last release before Twisted begins splitting up.
