https://www.cnblogs.com/liu-heng/p/7520564.html
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‘.sid’：‘audio/prs.sid’,
‘.sik’：‘application/x-trash’,
‘.sis’：‘application/vnd.symbian.install’,
‘.sisx’：‘x-epoc/x-sisx-app’,
‘.sit’：‘application/x-stuffit’,
‘.siv’：‘application/sieve’,
‘.sk’：‘image/x-skencil’,
‘.sk1’：‘image/x-skencil’,
‘.skr’：‘application/pgp-keys’,
‘.slk’：‘text/spreadsheet’,
‘.smaf’：‘application/x-smaf’,
‘.smc’：‘application/x-snes-rom’,
‘.smd’：‘application/vnd.stardivision.mail’,
‘.smf’：‘application/vnd.stardivision.math’,
‘.smi’：‘application/x-sami’,
‘.smil’：‘application/smil’,
‘.sml’：‘application/smil’,
‘.sms’：‘application/x-sms-rom’,
‘.snd’：‘audio/basic’,
‘.so’：‘application/x-sharedlib’,
‘.spc’：‘application/x-pkcs7-certificates’,
‘.spd’：‘application/x-font-speedo’,
‘.spec’：‘text/x-rpm-spec’,
‘.spl’：‘application/x-shockwave-flash’,
‘.spx’：‘audio/x-speex’,
‘.sql’：‘text/x-sql’,
‘.sr2’：‘image/x-sony-sr2’,
‘.src’：‘application/x-wais-source’,
‘.srf’：‘image/x-sony-srf’,
‘.srt’：‘application/x-subrip’,
‘.ssa’：‘text/x-ssa’,
‘.stc’：‘application/vnd.sun.xml.calc.template’,
‘.std’：‘application/vnd.sun.xml.draw.template’,
‘.sti’：‘application/vnd.sun.xml.impress.template’,
‘.stm’：‘audio/x-stm’,
‘.stw’：‘application/vnd.sun.xml.writer.template’,
‘.sty’：‘text/x-tex’,
‘.sub’：‘text/x-subviewer’,
‘.sun’：‘image/x-sun-raster’,
‘.sv4cpio’：‘application/x-sv4cpio’,
‘.sv4crc’：‘application/x-sv4crc’,
‘.svg’：‘image/svg+xml’,
‘.svgz’：‘image/svg+xml-compressed’,
‘.swf’：‘application/x-shockwave-flash’,
‘.sxc’：‘application/vnd.sun.xml.calc’,
‘.sxd’：‘application/vnd.sun.xml.draw’,
‘.sxg’：‘application/vnd.sun.xml.writer.global’,
‘.sxi’：‘application/vnd.sun.xml.impress’,
‘.sxm’：‘application/vnd.sun.xml.math’,
‘.sxw’：‘application/vnd.sun.xml.writer’,
‘.sylk’：‘text/spreadsheet’,
‘.t’：‘text/troff’,
‘.t2t’：‘text/x-txt2tags’,
‘.tar’：‘application/x-tar’,
‘.tar.bz’：‘application/x-bzip-compressed-tar’,
‘.tar.bz2’：‘application/x-bzip-compressed-tar’,
‘.tar.gz’：‘application/x-compressed-tar’,
‘.tar.lzma’：‘application/x-lzma-compressed-tar’,
‘.tar.lzo’：‘application/x-tzo’,
‘.tar.xz’：‘application/x-xz-compressed-tar’,
‘.tar.z’：‘application/x-tarz’,
‘.tbz’：‘application/x-bzip-compressed-tar’,
‘.tbz2’：‘application/x-bzip-compressed-tar’,
‘.tcl’：‘text/x-tcl’,
‘.tex’：‘text/x-tex’,
‘.texi’：‘text/x-texinfo’,
‘.texinfo’：‘text/x-texinfo’,
‘.tga’：‘image/x-tga’,
‘.tgz’：‘application/x-compressed-tar’,
‘.theme’：‘application/x-theme’,
‘.themepack’：‘application/x-windows-themepack’,
‘.tif’：‘image/tiff’,
‘.tiff’：‘image/tiff’,
‘.tk’：‘text/x-tcl’,
‘.tlz’：‘application/x-lzma-compressed-tar’,
‘.tnef’：‘application/vnd.ms-tnef’,
‘.tnf’：‘application/vnd.ms-tnef’,
‘.toc’：‘application/x-cdrdao-toc’,
‘.torrent’：‘application/x-bittorrent’,
‘.tpic’：‘image/x-tga’,
‘.tr’：‘text/troff’,
‘.ts’：‘application/x-linguist’,
‘.tsv’：‘text/tab-separated-values’,
‘.tta’：‘audio/x-tta’,
‘.ttc’：‘application/x-font-ttf’,
‘.ttf’：‘application/x-font-ttf’,
‘.ttx’：‘application/x-font-ttx’,
‘.txt’：‘text/plain’,
‘.txz’：‘application/x-xz-compressed-tar’,
‘.tzo’：‘application/x-tzo’,
‘.ufraw’：‘application/x-ufraw’,
‘.ui’：‘application/x-designer’,
‘.uil’：‘text/x-uil’,
‘.ult’：‘audio/x-mod’,
‘.uni’：‘audio/x-mod’,
‘.uri’：‘text/x-uri’,
‘.url’：‘text/x-uri’,
‘.ustar’：‘application/x-ustar’,
‘.vala’：‘text/x-vala’,
‘.vapi’：‘text/x-vala’,
‘.vcf’：‘text/directory’,
‘.vcs’：‘text/calendar’,
‘.vct’：‘text/directory’,
‘.vda’：‘image/x-tga’,
‘.vhd’：‘text/x-vhdl’,
‘.vhdl’：‘text/x-vhdl’,
‘.viv’：‘video/vivo’,
‘.vivo’：‘video/vivo’,
‘.vlc’：‘audio/x-mpegurl’,
‘.vob’：‘video/mpeg’,
‘.voc’：‘audio/x-voc’,
‘.vor’：‘application/vnd.stardivision.writer’,
‘.vst’：‘image/x-tga’,
‘.wav’：‘audio/x-wav’,
‘.wax’：‘audio/x-ms-asx’,
‘.wb1’：‘application/x-quattropro’,
‘.wb2’：‘application/x-quattropro’,
‘.wb3’：‘application/x-quattropro’,
‘.wbmp’：‘image/vnd.wap.wbmp’,
‘.wcm’：‘application/vnd.ms-works’,
‘.wdb’：‘application/vnd.ms-works’,
‘.webm’：‘video/webm’,
‘.wk1’：‘application/vnd.lotus-1-2-3’,
‘.wk3’：‘application/vnd.lotus-1-2-3’,
‘.wk4’：‘application/vnd.lotus-1-2-3’,
‘.wks’：‘application/vnd.ms-works’,
‘.wma’：‘audio/x-ms-wma’,
‘.wmf’：‘image/x-wmf’,
‘.wml’：‘text/vnd.wap.wml’,
‘.wmls’：‘text/vnd.wap.wmlscript’,
‘.wmv’：‘video/x-ms-wmv’,
‘.wmx’：‘audio/x-ms-asx’,
‘.wp’：‘application/vnd.wordperfect’,
‘.wp4’：‘application/vnd.wordperfect’,
‘.wp5’：‘application/vnd.wordperfect’,
‘.wp6’：‘application/vnd.wordperfect’,
‘.wpd’：‘application/vnd.wordperfect’,
‘.wpg’：‘application/x-wpg’,
‘.wpl’：‘application/vnd.ms-wpl’,
‘.wpp’：‘application/vnd.wordperfect’,
‘.wps’：‘application/vnd.ms-works’,
‘.wri’：‘application/x-mswrite’,
‘.wrl’：‘model/vrml’,
‘.wv’：‘audio/x-wavpack’,
‘.wvc’：‘audio/x-wavpack-correction’,
‘.wvp’：‘audio/x-wavpack’,
‘.wvx’：‘audio/x-ms-asx’,
‘.x3f’：‘image/x-sigma-x3f’,
‘.xac’：‘application/x-gnucash’,
‘.xbel’：‘application/x-xbel’,
‘.xbl’：‘application/xml’,
‘.xbm’：‘image/x-xbitmap’,
‘.xcf’：‘image/x-xcf’,
‘.xcf.bz2’：‘image/x-compressed-xcf’,
‘.xcf.gz’：‘image/x-compressed-xcf’,
‘.xhtml’：‘application/xhtml+xml’,
‘.xi’：‘audio/x-xi’,
‘.xla’：‘application/vnd.ms-excel’,
‘.xlc’：‘application/vnd.ms-excel’,
‘.xld’：‘application/vnd.ms-excel’,
‘.xlf’：‘application/x-xliff’,
‘.xliff’：‘application/x-xliff’,
‘.xll’：‘application/vnd.ms-excel’,
‘.xlm’：‘application/vnd.ms-excel’,
‘.xls’：‘application/vnd.ms-excel’,
‘.xlsm’：‘application/vnd.openxmlformats-officedocument.spreadsheetml.sheet’,
‘.xlsx’：‘application/vnd.openxmlformats-officedocument.spreadsheetml.sheet’,
‘.xlt’：‘application/vnd.ms-excel’,
‘.xlw’：‘application/vnd.ms-excel’,
‘.xm’：‘audio/x-xm’,
‘.xmf’：‘audio/x-xmf’,
‘.xmi’：‘text/x-xmi’,
‘.xml’：‘application/xml’,
‘.xpm’：‘image/x-xpixmap’,
‘.xps’：‘application/vnd.ms-xpsdocument’,
‘.xsl’：‘application/xml’,
‘.xslfo’：‘text/x-xslfo’,
‘.xslt’：‘application/xml’,
‘.xspf’：‘application/xspf+xml’,
‘.xul’：‘application/vnd.mozilla.xul+xml’,
‘.xwd’：‘image/x-xwindowdump’,
‘.xyz’：‘chemical/x-pdb’,
‘.xz’：‘application/x-xz’,
‘.w2p’：‘application/w2p’,
‘.z’：‘application/x-compress’,
‘.zabw’：‘application/x-abiword’,
‘.zip’：‘application/zip’,
‘.zoo’：‘application/x-zoo’,
