Cowboy 2.0.0-rc.1 has been released!

This is the new recommended version of Cowboy. Its API should not change before release. While you probably should not use it in production yet, many do successfully. Use at your own risk.

The plan is to have a new RC version every couple weeks until the summer ends or later if there are still blocking issues open. Only issues that can’t be fixed without making breaking changes to the interface may block the release.

Numerous changes were made since Cowboy 1.0. The one most people care about is probably HTTP/2, but it’s most likely not the only one worthwhile. The full list of changes (excluding types) can be found in the user guide chapter Migrating from Cowboy 1.0 to 2.0.

As this is not the full release just yet, please pay extra attention to details and report anything suspicious you find.

There are still some tests failing. Most of those are related to standards that are not being followed perfectly just yet. Some of those will probably not be fixed before Cowboy 2.0 is released. They are edge cases and should not prevent interoperability.

The manual received a lot of love. It now has one page per function with a detailed description, arguments list, return value, changelog and examples. It also links to the other relevant manual pages: https://ninenines.eu/docs/en/cowboy/2.0/manual/

Cowboy is now tested and supported with Erlang/OTP 19.0 or above on Arch Linux, FreeBSD, OSX, Ubuntu and Windows 7. Contact me if you can provide permanent access to another platform for the purposes of testing.

Cowboy is now available from four locations:

They are updated at the same time so there is no real difference.