Parameter 'file_types' in gr.File() is unusable

[xxxpsyduck]

Describe the bug

when specifying file_types in gr.File, the is_valid_file will be called:

https://github.com/gradio-app/gradio/blob/fd0264f3358ef848690eceacb75481212dceecf0/gradio/components/file.py#L129-L134

https://github.com/gradio-app/gradio/blob/fd0264f3358ef848690eceacb75481212dceecf0/client/python/gradio_client/utils.py#L690-L704 the call to get_mimetype() in line 691 is wrong: https://github.com/gradio-app/gradio/blob/fd0264f3358ef848690eceacb75481212dceecf0/client/python/gradio_client/utils.py#L668-L674 because it will call to mimetypes.guess_type(): So if I have docx in the file_types:

file_type = 'docx'
mime_type_split[1] = 'vnd.openxmlformats-officedocument.wordprocessingml.document'

I believe we should change get_mimetype() to get_extenstion() instead: https://github.com/gradio-app/gradio/blob/fd0264f3358ef848690eceacb75481212dceecf0/client/python/gradio_client/utils.py#L677-L687

So everything will be correct:

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Reproduction

As above

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System Info

Gradio Environment Information:
------------------------------
Operating System: Linux
gradio version: 5.0.2
gradio_client version: 1.4.0

Severity

Blocking usage of gradio

[xxxpsyduck]

Update: already discussed at #9646 but I want to propose a different fix here