We are happy to announce the release of mitmproxy 6.0! While the version bump may suggest otherwise, this really is a bugfix release while we prepare for much larger changes in the next version.

What’s in the release?

We’ve bumped the major version as support for Python 3.6 and 3.7 has been dropped. But don’t let that fool you — it’s really mostly bugfixes. Everybody should upgrade!

What’s coming up?

Apparently not all complete rewrites are doomed: We are on the final stretch to replace our current proxy core with a completely rewritten sans-io implementation in #4343. We will follow up with a separate blog post detailing this massive undertaking in the coming days.

If you want to learn more ahead of time, join us on our developer chat!

Release Changelog

Since the release of mitmproxy 5.3 about a month ago, the project has had 96 commits by 10 contributors, resulting in 33 closed issues and 40 closed PRs.

• Mitmproxy now requires Python 3.8 or above.
• Deprecation of pathod and pathoc tools and modules. Future releases will not contain them! (@Kriechi)
• SSLKEYLOGFILE now supports TLS 1.3 secrets (@mhils)
• Fix query parameters in asgiapp addon (@jpstotz)
• Fix command history failing on file I/O errors (@Kriechi)
• Add example addon to suppress unwanted error messages sent by mitmproxy. (@anneborcherding)
• Updated imports and styles for web scanner helper addons. (@anneborcherding)
• Inform when underscore-formatted options are used in client arg. (@jrblixt)
• ASGIApp now ignores loaded HTTP flows from somewhere. (@linw1995)
• Binaries are now built with Python 3.9 (@mhils)
• Fixed the web UI showing blank page on clicking details tab when server address is missing (@samhita-sopho)
• Tests: Replace asynctest with stdlib mock (@felixonmars)
• MapLocal now keeps its configuration when other options are set. (@mhils)
• Host headers with non-standard ports are now properly updated in reverse proxy mode. (@mhils)
• Fix missing host header when replaying HTTP/2 flows (@Granitosaurus)
• … and various other fixes, documentation improvements, dependency version bumps, etc.