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T.P.MIME, extensionFromMimeType: add a few special cases.

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When we do a reverse lookup in the MIME table, we just get the
last match, so when the same mime type is associated with several
different extensions, we sometimes got weird results, e.g. `.vs`
for `text/plain`.  These special cases help us get the most standard
extensions for mime types like `text/plain`.
This commit is contained in:
John MacFarlane
2021-06-10 16:36:54 -07:00
parent c7dd33d5aa
commit aa79b3035c
1 changed files with 10 additions and 0 deletions
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src/Text/Pandoc/MIME.hs
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@@ -43,6 +43,16 @@ getMimeTypeDef :: FilePath -> MimeType
getMimeTypeDef = fromMaybe "application/octet-stream" . getMimeType
extensionFromMimeType :: MimeType -> Maybe T.Text
-- few special cases, where there are multiple options:
extensionFromMimeType "text/plain" = Just "txt"
extensionFromMimeType "video/quicktime" = Just "mov"
extensionFromMimeType "video/mpeg" = Just "mpeg"
extensionFromMimeType "video/dv" = Just "dv"
extensionFromMimeType "image/vnd.djvu" = Just "djvu"
extensionFromMimeType "image/tiff" = Just "tiff"
extensionFromMimeType "image/jpeg" = Just "jpg"
extensionFromMimeType "application/xml" = Just "xml"
extensionFromMimeType "application/ogg" = Just "ogg"
extensionFromMimeType mimetype =
M.lookup (T.takeWhile (/=';') mimetype) reverseMimeTypes
-- note: we just look up the basic mime type, dropping the content-encoding etc.