Sourced from rack's changelog.

Changelog

All notable changes to this project will be documented in this file. For info on how to format all future additions to this file please reference Keep A Changelog.

Unreleased

SPEC Changes

• Request environment keys must now be strings. #2310, [@​jeremyevans])
• Add nil as a valid return from a Response body.to_path (#2318, [@​MSP-Greg])

Added

• Introduce Rack::VERSION constant. (#2199, [@​ioquatix])
• ISO-2022-JP encoded parts within MIME Multipart sections of an HTTP request body will now be converted to UTF-8. (#2245, @​nappa)

Changed

• Invalid cookie keys will now raise an error. (#2193, [@​ioquatix])
• Rack::MediaType#params now handles empty strings. (#2229, [@​jeremyevans])
• Avoid unnecessary calls to the ip_filter lambda to evaluate Request#ip (#2287, [@​willbryant])
• Only calculate Request#ip once per request (#2292, [@​willbryant])

Deprecated

• Rack::Auth::AbstractRequest#request is deprecated without replacement. (#2229, [@​jeremyevans])
• Rack::Request#parse_multipart (private method designed to be overridden in subclasses) is deprecated without replacement. (#2229, [@​jeremyevans])

Removed

• Rack::Request#values_at is removed. (#2200, [@​ioquatix])
• Rack::Logger is removed with no replacement. (#2196, [@​ioquatix])
• Automatic cache invalidation in Rack::Request#{GET,POST} has been removed. (#2230, [@​jeremyevans])
• Support for CGI::Cookie has been removed. (#2332, [@​ioquatix])

Fixed

• Rack::RewindableInput::Middleware no longer wraps a nil input. (#2259, @​tt)
• Fix NoMethodError in Rack::Request#wrap_ipv6 when x-forwarded-host is empty. (#2270, @​oieioi)
• Fix the specification for SERVER_PORT which was incorrectly documented as required to be an Integer if present - it must be a String containing digits only. (#2296, [@​ioquatix])
• SERVER_NAME and HTTP_HOST are now more strictly validated according to the relevant specifications. (#2298, [@​ioquatix])

[3.1.15] - 2025-05-18

• Optional support for CGI::Cookie if not available. (#2327, #2333, [@​earlopain])

• df2f3f2 Bump patch version.
• aed514d Fix ReDoS and consistency in multipart regexes
• 352650a Synchronize changelog.
• 835e15b Bump patch version.
• bd60f6e Feature detect CGI::Cookie. (#2333)
• 3c1a46d Replace usage of CGI::Cookie (#2328)
• 0ac5c57 Test on Ruby v3.4.
• See full diff in compare view

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