mimetypes.guess_type()

mimetypes.guess_type(url, strict=True)

Guess the type of a file based on its URL.

Return value is a tuple (type, encoding) where type is None if the type can’t be guessed (no or unknown suffix) or a string of the form type/subtype, usable for a MIME Content-type header; and encoding is None for no encoding or the name of the program used to encode (e.g. compress or gzip). The mappings are table driven. Encoding suffixes are case sensitive; type suffixes are first tried case sensitive, then case insensitive.

The suffixes .tgz, .taz and .tz (case sensitive!) are all mapped to ”.tar.gz”. (This is table-driven too, using the dictionary suffix_map).

Optional `strict’ argument when false adds a bunch of commonly found, but non-standard types.