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I'm confused by the number of different modules that deal with mime types in Rails. There are three that I have in mind, if somebody could straighten this out for me I would be grateful.
1) Mime::Type (for respond_to)
Mime::Type.register "text/richtext", :rtf
2) MIME::Types (from the mime-types gem)
MIME::Types[/ogg/, :complete => true]
3) Rack::Mime::MIME_TYPES (for serving content)
Rack::Mime::MIME_TYPES.merge!({".ogg" => "audio/ogg"})
Are these three completely separate or is there any connection between them? It seems strange to maintain 3 different lists of mime types, but their purposes do seem disjoint, I guess.
More specifically, how should I know which of these to register a new type with?
Thanks!
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The MIME types defined by Rails and your initializers are the methods that you call on the block object format or the symbols that you pass to respond_to. You may recognise these from the symbols passed to the Mime::Type.
MIME types—also sometimes called Internet media types or Content-types—describe the media type of content either contained in email or served by web servers or web applications, and are intended to help guide a web browser to correctly process and display the content.
What Does Multi-Purpose Internet Mail Extensions Type (MIME Type) Mean? Multi-Purpose Internet Mail Extensions (MIME) type is standard that helps in classifying the types of files used on the Internet. MIME types were originally developed as a standard to identify the message of an email body.
A media type (also known as a Multipurpose Internet Mail Extensions or MIME type) indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.
Some waffle of an answer...
Rails (1) and Rack (3) were separate, so I guess that explains the split there - and hopefully at some point Rails will use the Rack one now that its Rack-based...
As for (2), this seems to be a non-Rails/Rack library for identifying a files type - http://mime-types.rubyforge.org/ - so perhaps the ideal future would be for Rails and Rack to be based on this... although it seems quite old now (2009) and is perhaps un-maintained, hence the lack of use...
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