Twisted Matrix Laboratories: 2019

Sunday, November 10, 2019

On behalf of Twisted Matrix Laboratories, I am honoured to announce the release of Twisted 19.10! The highlights of this release are:

Security fixes for HTTP/2 -- CVE-2019-9512 (Ping Flood), CVE-2019-9514 (Reset Flood), and CVE-2019-9515 (Settings Flood). Thanks to Jonathan Looney and Piotr Sikora.
HTTP/2 fixes regarding timeouts.
trial's assertResultOf, failureResultOf, and successResultOf, now accept Deferred-awaiting coroutines.
Various other bug fixes for POP3, conch.ssh.keys, and twisted.web.client.FileBodyProducer.

You can find the downloads at <https://pypi.python.org/pypi/Twisted> (or alternatively <http://twistedmatrix.com/trac/wiki/Downloads>). The NEWS file is also available at <https://github.com/twisted/twisted/blob/twisted-19.10.0/NEWS.rst>.

Many thanks to everyone who had a part in this release - the supporters of the Twisted Software Foundation, the developers who contributed code as well as documentation, and all the people building great things with Twisted!

- hawkowl

On behalf of Twisted Matrix Laboratories and our long-suffering release manager Amber Brown, I am honored to announce¹ the release of Twisted 19.7.0!

The highlights of this release include:

A full description on the PyPI page! Check it out here: https://pypi.org/project/Twisted/19.7.0/ (and compare to the slightly sad previous version, here: https://pypi.org/project/Twisted/19.2.1/)
twisted.test.proto_helpers has been renamed to "twisted.internet.testing"

This removes the gross special-case carve-out where it was the only "public" API in a test module, and now the rule is that all test modules are private once again.

This is a very important security fix for any twisted.words / XMPP users. (See https://twistedmatrix.com/trac/ticket/9561)

A nasty data-corruption bug in the IOCP reactor was fixed. If you're doing high-volume I/O on Windows you'll want to upgrade!
Twisted Web no longer gives clients a traceback by default, both when you instantiate Site and when you use twist web on the command line. You can turn this behavior back on for local development with twist web --display-tracebacks.
Several bugfixes and documentation fixes resolving bytes/unicode type confusion in twisted.web.
Python 3.4 is no longer supported.

pip install -U twisted[tls] and enjoy all these enhancements today!

Thanks for using Twisted,

-glyph

¹: somewhat belatedly: it came out 10 days ago. Oops!

On behalf of Twisted Matrix Laboratories, I am honoured to announce the release of Twisted 19.2.1!

This is a security release, and contains the following changes:

All HTTP clients in twisted.web.client now raise a ValueError when called with a method and/or URL that contain invalid characters. This mitigates CVE-2019-12387. Thanks to Alex Brasetvik for reporting this vulnerability.

It is recommended you update to this release as soon as is practical.

Additional mitigation may be required if Twisted is not your only HTTP client library:

This bug is present in all current versions of urllib2 in CPython. More information can be found on the Python bug tracker: https://bugs.python.org/issue30458
This bug was present in urllib3 up until version 1.24.3. More information can be found on the urllib3 bug tracker: https://github.com/urllib3/urllib3/issues/1553

On behalf of Twisted Matrix Laboratories, I am honoured to announce the release of Twisted 19.2! The highlights of this release are:

twisted.web.client.HostnameCachingHTTPSPolicy was added as a new contextFactory option. This reduces the performance overhead for making many TLS connections to the same host.
twisted.conch.ssh.keys can now read private keys in the new "openssh-key-v1" format, introduced in OpenSSH 6.5 and made the default in OpenSSH 7.8.
The sample code in the "Twisted Web In 60 Seconds" tutorial runs on Python 3.
DeferredLock and DeferredSemaphore can be used as asynchronous context managers on Python 3.5+.
twisted.internet.ssl.CertificateOptions now uses 32 random bytes instead of an MD5 hash for the ssl session identifier context.
twisted.python.failure.Failure.getTracebackObject now returns traceback objects whose frames can be passed into traceback.print_stack for better debugging of where the exception came from.
Much more! 20+ tickets closed overall.

You can find the downloads at <https://pypi.python.org/pypi/Twisted> (or alternatively <http://twistedmatrix.com/trac/wiki/Downloads>). The NEWS file is also available at <https://github.com/twisted/twisted/blob/twisted-19.2.0/NEWS.rst>.

Many thanks to everyone who had a part in this release - the supporters of the Twisted Software Foundation, the developers who contributed code as well as documentation, and all the people building great things with Twisted!

Twisted Regards,
Amber Brown (HawkOwl)