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December 26, 2019
  • 1 minor bugfix:

    • Al Snow fixed a warning with MIME::Types::Logger producing a warning because Ruby 2.7 introduces numbered block parameters. Because of the way that the MIME::Types::Logger works for deprecation messages, the initializer parameters had been named _1, _2, and _3. This has now been resolved. [#146][]
  • Administrivia:

    • Olle Jonsson removed an outdated Travis configuration option (sudo: false). [#142][]


September 4, 2019
  • 1 minor enhancement

    • Jean Boussier reduced memory usage for Ruby versions 2.3 or higher by interning various string values in each type. This is done with a backwards-compatible call that freezes the strings on older versions of Ruby. [#141][]
  • Administrivia:

    • Nicholas La Roux updated Travis build configurations. [#139][]


August 12, 2018
  • Hiroto Fukui removed a stray debugger statement that I had used in producing v3.2.1. [#137][]


August 12, 2018
  • A few bugs related to MIME::Types::Container and its use in the mime-types-data helper tools reared their head because I released 3.2 before verifying against mime-types-data.


August 12, 2018
  • 2 minor enhancements

    • Janko Marohnić contributed a change to MIME::Type#priority_order that should improve on strict sorting when dealing with MIME types that appear to be in the same family even if strict sorting would cause an unregistered type to be sorted first. [#132][]

    • Dillon Welch contributed a change that added frozen_string_literal: true to files so that modern Rubies can automatically reduce duplicate string allocations. [#135][]

  • 2 bug fixes

    • Burke Libbey fixed a problem with cached data loading. [#126][]

    • Resolved an issue where Enumerable#inject returns nil when provided an empty enumerable and a default value has not been provided. This is because when Enumerable#inject isn't provided a starting value, the first value is used as the default value. In every case where this error was happening, the result was supposed to be an array containing Set objects so they can be reduced to a single Set. [#117][], [#127][], [#134][].

    • Fixed an uncontrolled growth bug in MIME::Types::Container where a key miss would create a new entry with an empty Set in the container. This was working as designed (this particular feature was heavily used during MIME::Type registry construction), but the design was flawed in that it did not have any way of determining the difference between construction and querying. This would mean that, if you have a function in your web app that queries the MIME::Types registry by extension, the extension registry would grow uncontrollably. [#136][]

  • Deprecations:

    • Lazy loading ($RUBY_MIME_TYPES_LAZY_LOAD) has been deprecated.
  • Documentation Changes:

    • Supporting files are now Markdown instead of rdoc, except for the README.

    • The history file has been modified to remove all history prior to 3.0. This history can be found in previous commits.

    • A spelling error was corrected by Edward Betts ([#129][]).

  • Administrivia:

    • CI configuration for more modern versions of Ruby were added by Nicolas Leger ([#130][]), Jun Aruga ([#125][]), and Austin Ziegler. Removed ruby-head-clang and rbx (Rubinius) from CI.

    • Fixed tests which were asserting equality against nil, which will become an error in Minitest 6.


May 22, 2016
  • 1 documentation change:

    • Tim Smith (@tas50) updated the build badges to be SVGs to improve readability on high-density (retina) screens with pull request [#112][].
  • 3 bug fixes

    • A test for MIME::Types::Cache fails under Ruby 2.3 because of frozen strings, [#118][]. This has been fixed.

    • The JSON data has been incorrectly encoded since the release of mime-types 3 on the xrefs field, because of the switch to using a Set to store cross-reference information. This has been fixed.

    • A tentative fix for [#117][] has been applied, removing the only circular require dependencies that exist (and for which there was code to prevent, but the current fix is simpler). I have no way to verify this fix and depending on how things are loaded by delayed_job, this fix may not be sufficient.

  • 1 governance change

    • Updated to Contributor Covenant 1.4.


November 21, 2015
  • 2 governance changes

    • This project and the related mime-types-data project are now exclusively MIT licensed. Resolves #95.

    • All projects under the mime-types organization now have a standard code of conduct adapted from the Contributor Covenant. This text can be found in the file.

  • 3 major changes

    • All methods deprecated in mime-types 2.x have been removed.

    • mime-types now requires Ruby 2.0 compatibility or later. Resolves #97.

    • The registry data has been removed from mime-types and put into mime-types-data, maintained and released separately. It can be found at mime-types-data.

  • 17 minor changes:

    • MIME::Type changes:

      • Changed the way that simplified types representations are created to reflect the fact that x- prefixes are no longer considered special according to IANA. A simplified MIME type is case-folded to lowercase. A new keyword parameter, remove_x_prefix, can be provided to remove x- prefixes.

      • Improved initialization with an Array works so that extensions do not need to be wrapped in another array. This means that %w(text/yaml yaml yml) works in the same way that ['text/yaml', %w(yaml yml)] did (and still does).

      • Changed priority_compare to conform with attributes that no longer exist.

      • Changed the internal implementation of extensions to use a frozen Set.

      • When extensions are set or modified with add_extensions, the primary registry will be informed of a need to reindex extensions. Resolves #84.

      • The preferred extension can be set explicitly. If not set, it will be the first extension. If the preferred extension is not in the extension list, it will be added.

      • Improved how xref URLs are generated.

      • Converted obsolete, registered and signature to attr_accessors.

    • MIME::Types changes:

      • Modified to track instances of MIME::Types so that they can be told to reindex the extensions as necessary.

      • Removed data_version attribute.

      • Changed #[] so that the complete and registered flags are keywords instead of a generic options parameter.

      • Extracted the class methods to a separate file.

      • Changed the container implementation to use a Set instead of an Array to prevent data duplication. Resolves #79.

    • MIME::Types::Cache changes:

      • Caching is now based on the data gem version instead of the mime-types version.

      • Caching is compatible with columnar registry stores.

    • MIME::Types::Loader changes:

      • MIME::Types::Loader::PATH has been removed and replaced with MIME::Types::Data::PATH from the mime-types-data gem. The environment variable RUBY_MIME_TYPES_DATA is still used.

      • Support for the long-deprecated mime-types v1 format has been removed.

      • The registry is default loaded from the columnar store by default. The internal format of the columnar store has changed; many of the boolean flags are now loaded from a single file. Resolves #85.