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* Add `config.action_controller.always_permitted_parameters` to configure which
parameters are permitted globally. The default value of this configuration is
`['controller', 'action']`.
*Gary S. Weaver*, *Rafael Chacon*
* Fix env['PATH_INFO'] missing leading slash when a rack app mounted at '/'.
Fixes #15511.
*Larry Lv*
* ActionController::Parameters#require now accepts `false` values.
Fixes #15685.
*Sergio Romano*
* With authorization header `Authorization: Token token=`, `authenticate` now
recognize token as nil, instead of "token".
Fixes #14846.
*Larry Lv*
* Ensure the controller is always notified as soon as the client disconnects
during live streaming, even when the controller is blocked on a write.
*Nicholas Jakobsen*, *Matthew Draper*
* Routes specifying 'to:' must be a string that contains a "#" or a rack
application. Use of a symbol should be replaced with `action: symbol`.
Use of a string without a "#" should be replaced with `controller: string`.
* Fix URL generation with `:trailing_slash` such that it does not add
a trailing slash after `.:format`
*Dan Langevin*
* Build full URI as string when processing path in integration tests for
performance reasons.
*Guo Xiang Tan*
* Fix `'Stack level too deep'` when rendering `head :ok` in an action method
called 'status' in a controller.
Fixes #13905.
*Christiaan Van den Poel*
* Add MKCALENDAR HTTP method (RFC 4791).
*Sergey Karpesh*
* Instrument fragment cache metrics.
Adds `:controller`: and `:action` keys to the instrumentation payload
for the `*_fragment.action_controller` notifications. This allows tracking
e.g. the fragment cache hit rates for each controller action.
*Daniel Schierbeck*
* Always use the provided port if the protocol is relative.
Fixes #15043.
*Guilherme Cavalcanti*, *Andrew White*
* Moved `params[request_forgery_protection_token]` into its own method
and improved tests.
Fixes #11316.
*Tom Kadwill*
* Added verification of route constraints given as a Proc or an object responding
to `:matches?`. Previously, when given an non-complying object, it would just
silently fail to enforce the constraint. It will now raise an `ArgumentError`
when setting up the routes.
*Xavier Defrang*
* Properly treat the entire IPv6 User Local Address space as private for
purposes of remote IP detection. Also handle uppercase private IPv6
addresses.
Fixes #12638.
*Caleb Spare*
* Fixed an issue with migrating legacy json cookies.
Previously, the `VerifyAndUpgradeLegacySignedMessage` assumes all incoming
cookies are marshal-encoded. This is not the case when `secret_token` is
used in conjunction with the `:json` or `:hybrid` serializer.
In those case, when upgrading to use `secret_key_base`, this would cause a
`TypeError: incompatible marshal file format` and a 500 error for the user.
Fixes #14774.
*Godfrey Chan*
* Make URL escaping more consistent:
1. Escape '%' characters in URLs - only unescaped data should be passed to URL helpers
2. Add an `escape_segment` helper to `Router::Utils` that escapes '/' characters
3. Use `escape_segment` rather than `escape_fragment` in optimized URL generation
4. Use `escape_segment` rather than `escape_path` in URL generation
For point 4 there are two exceptions. Firstly, when a route uses wildcard segments
(e.g. `*foo`) then we use `escape_path` as the value may contain '/' characters. This
means that wildcard routes can't be optimized. Secondly, if a `:controller` segment
is used in the path then this uses `escape_path` as the controller may be namespaced.
Fixes #14629, #14636 and #14070.
*Andrew White*, *Edho Arief*
* Add alias `ActionDispatch::Http::UploadedFile#to_io` to
`ActionDispatch::Http::UploadedFile#tempfile`.
*Tim Linquist*
* Returns null type format when format is not know and controller is using `any`
format block.
Fixes #14462.
*Rafael Mendonça França*
* Improve routing error page with fuzzy matching search.
*Winston*
* Only make deeply nested routes shallow when parent is shallow.
Fixes #14684.
*Andrew White*, *James Coglan*
* Append link to bad code to backtrace when exception is `SyntaxError`.
*Boris Kuznetsov*
* Swapped the parameters of assert_equal in `assert_select` so that the
proper values were printed correctly.
Fixes #14422.
*Vishal Lal*
* The method `shallow?` returns false if the parent resource is a singleton so
we need to check if we're not inside a nested scope before copying the :path
and :as options to their shallow equivalents.
Fixes #14388.
*Andrew White*
* Make logging of CSRF failures optional (but on by default) with the
`log_warning_on_csrf_failure` configuration setting in
`ActionController::RequestForgeryProtection`.
*John Barton*
* Fix URL generation in controller tests with request-dependent
`default_url_options` methods.
*Tony Wooster*
Please check [4-1-stable](https://github.com/rails/rails/blob/4-1-stable/actionpack/CHANGELOG.md) for previous changes.
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