文件后缀名 对于mime type
'apk' 'application/vnd.android.package-archive',
'3gp' 'video/3gpp',
'ai' 'application/postscript',
'aif' 'audio/x-aiff',
'aifc' 'audio/x-aiff',
'aiff' 'audio/x-aiff',
'asc' 'text/plain',
'atom' 'application/atom+xml',
'au' 'audio/basic',
'avi' 'video/x-msvideo',
'bcpio' 'application/x-bcpio',
'bin' 'application/octet-stream',
'bmp' 'image/bmp',
'cdf' 'application/x-netcdf',
'cgm' 'image/cgm',
'class' 'application/octet-stream',
'cpio' 'application/x-cpio',
'cpt' 'application/mac-compactpro',
'csh' 'application/x-csh',
'css' 'text/css',
'dcr' 'application/x-director',
'dif' 'video/x-dv',
'dir' 'application/x-director',
'djv' 'image/vnd.djvu',
'djvu' 'image/vnd.djvu',
'dll' 'application/octet-stream',
'dmg' 'application/octet-stream',
'dms' 'application/octet-stream',
'doc' 'application/msword',
'dtd' 'application/xml-dtd',
'dv' 'video/x-dv',
'dvi' 'application/x-dvi',
'dxr' 'application/x-director',
'eps' 'application/postscript',
'etx' 'text/x-setext',
'exe' 'application/octet-stream',
'ez' 'application/andrew-inset',
'flv' 'video/x-flv',
'gif' 'image/gif',
'gram' 'application/srgs',
'grxml' 'application/srgs+xml',
'gtar' 'application/x-gtar',
'gz' 'application/x-gzip',
'hdf' 'application/x-hdf',
'hqx' 'application/mac-binhex40',
'htm' 'text/html',
'html' 'text/html',
'ice' 'x-conference/x-cooltalk',
'ico' 'image/x-icon',
'ics' 'text/calendar',
'ief' 'image/ief',
'ifb' 'text/calendar',
'iges' 'model/iges',
'igs' 'model/iges',
'jnlp' 'application/x-java-jnlp-file',
'jp2' 'image/jp2',
'jpe' 'image/jpeg',
'jpeg' 'image/jpeg',
'jpg' 'image/jpeg',
'js' 'application/x-javascript',
'kar' 'audio/midi',
'latex' 'application/x-latex',
'lha' 'application/octet-stream',
'lzh' 'application/octet-stream',
'm3u' 'audio/x-mpegurl',
'm4a' 'audio/mp4a-latm',
'm4p' 'audio/mp4a-latm',
'm4u' 'video/vnd.mpegurl',
'm4v' 'video/x-m4v',
'mac' 'image/x-macpaint',
'man' 'application/x-troff-man',
'mathml' 'application/mathml+xml',
'me' 'application/x-troff-me',
'mesh' 'model/mesh',
'mid' 'audio/midi',
'midi' 'audio/midi',
'mif' 'application/vnd.mif',
'mov' 'video/quicktime',
'movie' 'video/x-sgi-movie',
'mp2' 'audio/mpeg',
'mp3' 'audio/mpeg',
'mp4' 'video/mp4',
'mpe' 'video/mpeg',
'mpeg' 'video/mpeg',
'mpg' 'video/mpeg',
'mpga' 'audio/mpeg',
'ms' 'application/x-troff-ms',
'msh' 'model/mesh',
'mxu' 'video/vnd.mpegurl',
'nc' 'application/x-netcdf',
'oda' 'application/oda',
'ogg' 'application/ogg',
'ogv' 'video/ogv',
'pbm' 'image/x-portable-bitmap',
'pct' 'image/pict',
'pdb' 'chemical/x-pdb',
'pdf' 'application/pdf',
'pgm' 'image/x-portable-graymap',
'pgn' 'application/x-chess-pgn',
'pic' 'image/pict',
'pict' 'image/pict',
'png' 'image/png',
'pnm' 'image/x-portable-anymap',
'pnt' 'image/x-macpaint',
'pntg' 'image/x-macpaint',
'ppm' 'image/x-portable-pixmap',
'ppt' 'application/vnd.ms-powerpoint',
'ps' 'application/postscript',
'qt' 'video/quicktime',
'qti' 'image/x-quicktime',
'qtif' 'image/x-quicktime',
'ra' 'audio/x-pn-realaudio',
'ram' 'audio/x-pn-realaudio',
'ras' 'image/x-cmu-raster',
'rdf' 'application/rdf+xml',
'rgb' 'image/x-rgb',
'rm' 'application/vnd.rn-realmedia',
'roff' 'application/x-troff',
'rtf' 'text/rtf',
'rtx' 'text/richtext',
'sgm' 'text/sgml',
'sgml' 'text/sgml',
'sh' 'application/x-sh',
'shar' 'application/x-shar',
'silo' 'model/mesh',
'sit' 'application/x-stuffit',
'skd' 'application/x-koan',
'skm' 'application/x-koan',
'skp' 'application/x-koan',
'skt' 'application/x-koan',
'smi' 'application/smil',
'smil' 'application/smil',
'snd' 'audio/basic',
'so' 'application/octet-stream',
'spl' 'application/x-futuresplash',
'src' 'application/x-wais-source',
'sv4cpio' 'application/x-sv4cpio',
'sv4crc' 'application/x-sv4crc',
'svg' 'image/svg+xml',
'swf' 'application/x-shockwave-flash',
't' 'application/x-troff',
'tar' 'application/x-tar',
'tcl' 'application/x-tcl',
'tex' 'application/x-tex',
'texi' 'application/x-texinfo',
'texinfo' 'application/x-texinfo',
'tif' 'image/tiff',
'tiff' 'image/tiff',
'tr' 'application/x-troff',
'tsv' 'text/tab-separated-values',
'txt' 'text/plain',
'ustar' 'application/x-ustar',
'vcd' 'application/x-cdlink',
'vrml' 'model/vrml',
'vxml' 'application/voicexml+xml',
'wav' 'audio/x-wav',
'wbmp' 'image/vnd.wap.wbmp',
'wbxml' 'application/vnd.wap.wbxml',
'webm' 'video/webm',
'wml' 'text/vnd.wap.wml',
'wmlc' 'application/vnd.wap.wmlc',
'wmls' 'text/vnd.wap.wmlscript',
'wmlsc' 'application/vnd.wap.wmlscriptc',
'wmv' 'video/x-ms-wmv',
'wrl' 'model/vrml',
'xbm' 'image/x-xbitmap',
'xht' 'application/xhtml+xml',
'xhtml' 'application/xhtml+xml',
'xls' 'application/vnd.ms-excel',
'xml' 'application/xml',
'xpm' 'image/x-xpixmap',
'xsl' 'application/xml',
'xslt' 'application/xslt+xml',
'xul' 'application/vnd.mozilla.xul+xml',
'xwd' 'image/x-xwindowdump',
'xyz' 'chemical/x-xyz',
'zip' 'application/zip'