The following list should be kept in sync with
"flac" - audio/flac "m4a" - audio/x-m4a "mp3" - audio/mp3 "oga" - audio/ogg "ogg" - audio/ogg "opus" - audio/ogg "wav" - audio/wav "weba" - audio/webm
"bmp" - image/bmp "gif" - image/gif "ico" - image/x-icon "jfif" - image/jpeg "jpeg" - image/jpeg "jpg" - image/jpeg "pjp" - image/jpeg "pjpeg" - image/jpeg "png" - image/png "svg" - image/svg+xml "svgz" - image/svg+xml "tif" - image/tiff "tiff" - image/tiff "webp" - image/webp "xbm" - image/x-xbitmap
"css" - text/css "csv" - text/csv "ehtml" - text/html "htm" - text/html "html" - text/html "shtm" - text/html "shtml" - text/html "text" - text/plain "txt" - text/plain
"m4v" - video/mp4 "mp4" - video/mp4 "mpeg" - video/mpeg "mpg" - video/mpeg "ogm" - video/ogg "ogv" - video/ogg "webm" - video/webm