What

Static content-type ("MIME") database.

To update the database

Run:

$ go generate ./generator

This updates and code generates our db.gen.go from the source's head. Remember to $ go fmt before committing.

Source of data

flowchart TD
    IANA -- aggregated to --> mimedb
    Apache -- aggregated to --> mimedb
    NGINX -- aggregated to --> mimedb
    mimedb["jshttp/mime-db"] -- uses / exposes --> gokit["gokit/mime"]

See more

Why?

Go's stdlib

Go's built-in DB relies on OS to provide it. It works differently on Windows, Linux etc.

On Alpine Linux IIRC there isn't a package to supply the database, unless you install Apache or Nginx.

Go's ecosystem

https://github.com/cubewise-code/go-mime

• TypeByExtension() doesn't have fallback
• there is no ExtensionByType()

https://github.com/gabriel-vasile/mimetype

• Based on magic numbers

https://github.com/h2non/filetype

• Based on magic numbers