34 lines
926 B
Python
34 lines
926 B
Python
"""
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Utils for mime/filetype handling
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"""
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from .internal import assert_subpackage; assert_subpackage(__name__)
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import functools
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from .common import PathIsh
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@functools.lru_cache(1)
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def _magic():
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import magic # type: ignore
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# TODO also has uncompess=True? could be useful
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return magic.Magic(mime=True)
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# TODO could reuse in pdf module?
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import mimetypes # todo do I need init()?
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# todo wtf? fastermime thinks it's mime is application/json even if the extension is xz??
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# whereas magic detects correctly: application/x-zstd and application/x-xz
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def fastermime(path: PathIsh) -> str:
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paths = str(path)
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# mimetypes is faster, so try it first
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(mime, _) = mimetypes.guess_type(paths)
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if mime is not None:
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return mime
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# magic is slower but handles more types
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# TODO Result type?; it's kinda racey, but perhaps better to let the caller decide?
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return _magic().from_file(paths)
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