content-type 的所有可选项

‘ez’        => ‘application/andrew-inset’,

    ‘hqx’        => ‘application/mac-binhex40’,

    ‘cpt’        => ‘application/mac-compactpro’,

    ‘doc’        => ‘application/msWord’,

    ‘bin’        => ‘application/octet-stream’,

    ‘dms’        => ‘application/octet-stream’,

    ‘lha’        => ‘application/octet-stream’,

    ‘lzh’        => ‘application/octet-stream’,

    ‘exe’        => ‘application/octet-stream’,

    ‘class’        => ‘application/octet-stream’,

    ‘so’        => ‘application/octet-stream’,

    ‘dll’        => ‘application/octet-stream’,

    ‘oda’        => ‘application/oda’,

    ‘pdf’        => ‘application/pdf’,

    ‘ai’        => ‘application/postscript’,

    ‘eps’        => ‘application/postscript’,

    ‘ps’        => ‘application/postscript’,

    ‘smi’        => ‘application/smil’,

    ‘smil’        => ‘application/smil’,

    ‘mif’        => ‘application/vnd.mif’,

    ‘xls’        => ‘application/vnd.ms-Excel’,

    ‘ppt’        => ‘application/vnd.ms-Powerpoint’,

    ‘wbxml’        => ‘application/vnd.wap.wbxml’,

    ‘wmlc’        => ‘application/vnd.wap.wmlc’,

    ‘wmlsc’        => ‘application/vnd.wap.wmlscriptc’,

    ‘bcpio’        => ‘application/x-bcpio’,

    ‘vcd’        => ‘application/x-cdlink’,

    ‘pgn’        => ‘application/x-chess-pgn’,

    ‘cpio’        => ‘application/x-cpio’,

    ‘csh’        => ‘application/x-csh’,

    ‘dcr’        => ‘application/x-Director’,

    ‘dir’        => ‘application/x-director’,

    ‘dxr’        => ‘application/x-director’,

    ‘dvi’        => ‘application/x-dvi’,

    ‘spl’        => ‘application/x-futuresplash’,

    ‘gtar’        => ‘application/x-gtar’,

    ‘hdf’        => ‘application/x-hdf’,

    ‘js’        => ‘application/x-javascript’,

    ‘skp’        => ‘application/x-koan’,

    ‘skd’        => ‘application/x-koan’,

    ‘skt’        => ‘application/x-koan’,

    ‘skm’        => ‘application/x-koan’,

    ‘latex’        => ‘application/x-latex’,

    ‘nc’        => ‘application/x-netcdf’,

    ‘cdf’        => ‘application/x-netcdf’,

    ‘sh’        => ‘application/x-sh’,

    ‘shar’        => ‘application/x-shar’,

    ‘swf’        => ‘application/x-shockwave-flash’,

    ‘sit’        => ‘application/x-stuffit’,

    ‘sv4cpio’    => ‘application/x-sv4cpio’,

    ‘sv4crc’    => ‘application/x-sv4crc’,

    ‘tar’        => ‘application/x-tar’,

    ‘tcl’        => ‘application/x-tcl’,

    ‘tex’        => ‘application/x-tex’,

    ‘texinfo’    => ‘application/x-texinfo’,

    ‘texi’        => ‘application/x-texinfo’,

    ‘t’            => ‘application/x-troff’,

    ‘tr’        => ‘application/x-troff’,

    ‘roff’        => ‘application/x-troff’,

    ‘man’        => ‘application/x-troff-man’,

    ‘me’        => ‘application/x-troff-me’,

    ‘ms’        => ‘application/x-troff-ms’,

    ‘ustar’        => ‘application/x-ustar’,

    ‘src’        => ‘application/x-wais-source’,

    ‘xhtml’        => ‘application/xhtml+xml’,

    ‘xht’        => ‘application/xhtml+xml’,

    ‘zip’        => ‘application/zip’,

    ‘au’        => ‘audio/basic’,

    ‘snd’        => ‘audio/basic’,

    ‘mid’        => ‘audio/midi’,

    ‘midi’        => ‘audio/midi’,

    ‘kar’        => ‘audio/midi’,

    ‘mpga’        => ‘audio/mpeg’,

    ‘mp2’        => ‘audio/mpeg’,

    ‘mp3’        => ‘audio/mpeg’,

    ‘aif’        => ‘audio/x-aiff’,

    ‘aiff’        => ‘audio/x-aiff’,

    ‘aifc’        => ‘audio/x-aiff’,

    ‘m3u’        => ‘audio/x-mpegurl’,

    ‘ram’        => ‘audio/x-pn-realaudio’,

    ‘rm’        => ‘audio/x-pn-realaudio’,

    ‘rpm’        => ‘audio/x-pn-realaudio-plugin’,

    ‘ra’        => ‘audio/x-realaudio’,

    ‘wav’        => ‘audio/x-wav’,

    ‘pdb’        => ‘chemical/x-pdb’,

    ‘xyz’        => ‘chemical/x-xyz’,

    ‘bmp’        => ‘image/bmp’,

    ‘gif’        => ‘image/gif’,

    ‘ief’        => ‘image/ief’,

    ‘jpeg’        => ‘image/jpeg’,

    ‘jpg’        => ‘image/jpeg’,

    ‘jpe’        => ‘image/jpeg’,

    ‘png’        => ‘image/png’,

    ‘tiff’        => ‘image/tiff’,

    ‘tif’        => ‘image/tiff’,

    ‘djvu’        => ‘image/vnd.djvu’,

    ‘djv’        => ‘image/vnd.djvu’,

    ‘wbmp’        => ‘image/vnd.wap.wbmp’,

    ‘ras’        => ‘image/x-cmu-raster’,

    ‘pnm’        => ‘image/x-portable-anymap’,

    ‘pbm’        => ‘image/x-portable-bitmap’,

    ‘pgm’        => ‘image/x-portable-graymap’,

    ‘ppm’        => ‘image/x-portable-pixmap’,

    ‘rgb’        => ‘image/x-rgb’,

    ‘xbm’        => ‘image/x-xbitmap’,

    ‘XPm’        => ‘image/x-xpixmap’,

    ‘xwd’        => ‘image/x-xwindowdump’,

    ‘igs’        => ‘model/iges’,

    ‘iges’        => ‘model/iges’,

    ‘msh’        => ‘model/mesh’,

    ‘mesh’        => ‘model/mesh’,

    ‘silo’        => ‘model/mesh’,

    ‘wrl’        => ‘model/vrml’,

    ‘vrml’        => ‘model/vrml’,

    ‘Css’        => ‘text/css’,

    ‘html’        => ‘text/html’,

    ‘htm’        => ‘text/html’,

    ‘asc’        => ‘text/plain’,

    ‘txt’        => ‘text/plain’,

    ‘rtx’        => ‘text/richtext’,

    ‘rtf’        => ‘text/rtf’,

    ‘sgml’        => ‘text/sgml’,

    ‘sgm’        => ‘text/sgml’,

    ‘tsv’        => ‘text/tab-separated-values’,

    ‘wml’        => ‘text/vnd.wap.wml’,

    ‘wmls’        => ‘text/vnd.wap.wmlscript’,

    ‘etx’        => ‘text/x-setext’,

    ‘xsl’        => ‘text/xml’,

    ‘xml’        => ‘text/xml’,

    ‘mpeg’        => ‘video/mpeg’,

    ‘mpg’        => ‘video/mpeg’,

    ‘mpe’        => ‘video/mpeg’,

    ‘qt’        => ‘video/quicktime’,

    ‘mov’        => ‘video/quicktime’,

    ‘mxu’        => ‘video/vnd.mpegurl’,

    ‘avi’        => ‘video/x-msvideo’,

    ‘movie’        => ‘video/x-sgi-movie’,

    ‘ice’        => ‘x-conference/x-cooltalk’,