consider mime crate to support more features easily...

[ultrasaurus]

We need to detect all the media types supported by EPUB, so considering using a crate which is maintained and well-tested, supporting:

• detecting mime-type by extension
• match on type (e.g. audio/video/image) as well as sub-type
• structured type with easy-to-use string conversion (e.g. display, debug, etc)

Options:

• mime
  • used by reqwest and lots more
  • mime_guess supports guessing mime type by extension
• new_mime_guess
  • has code to support markdown + m4a mapping seems correct at first glance
• mime_typed
  • more complete set of mime types than the "mime" crate
  • optional support for mime compatibility
• mediatype
  • zero copy MediaType or owned MediaTypeBuf
  • optional: serde support

[ultrasaurus]

I'm not fond of Mime crate

• lacks support of markdown mime type!
• lots of fair critiques in the issues

However, its maintainers make what seem to be good arguments about the hyper use case which lead to a bunch of the design decisions that some folks dislike, and different crates are making different tradeoffs

I don't understand our use case well enough, so just went with Mime to learn about it and will leave as is until I get a bit more experience with what is needed.

Closing for now, since PR merged that uses Mime. Feel free to re-open if there are any compelling arguments to use a different crate!

[ultrasaurus]

note: mime_guess doesn't do the right thing for .m4a files, abonander/mime_guess#88

[ultrasaurus]

could also consider https://github.com/Lynnesbian/new_mime_guess (fork of mime_guess)

added to list in issues description with notes