Match only first half of the mime type in FileTypeRouter

[ZanSara]

In many cases, converter components can handle an entire category of mimetypes, not only a specific one. For example, audio transcribers could handle all audio mimetypes, the text converter could handle all text mimetypes, and so on.

It would be convenient if FileTypeRouter could match a mime type only by its first half, so not audio/mpeg or audio/x-wav but audio.

[masci]

This could be done accepting regexes in the mime_types: List[str] parameter - this way it would be backward compatible

[Sgvkamalakar]

Hey @ZanSara , @masci ..

The following Python script utilizes the mimetypes module to access a dictionary containing all known MIME types and their corresponding file extensions.

import mimetypes
all_mime_types = mimetypes.types_map
s = set()
for mimetype, extension in all_mime_types.items():
    category = extension.split('/')[0]
    s.add((extension, category))
sorted_list = sorted(s, key=lambda x: x[0])
for i in sorted_list:  print(i)

Output:

...
...
...
('audio/3gpp', 'audio')
('audio/3gpp2', 'audio')
('audio/aac', 'audio')
('audio/basic', 'audio')
('audio/mpeg', 'audio')
('audio/opus', 'audio')
('audio/x-aiff', 'audio')
('audio/x-pn-realaudio', 'audio')
('audio/x-wav', 'audio')
('image/gif', 'image')
('image/heic', 'image')
('image/heif', 'image')
('image/ief', 'image')
('image/jpeg', 'image')
('image/png', 'image')
('image/svg+xml', 'image')
...
...
...