All common Internet Media Types, in Javascript list form (for testing stuffs).

Content-Type-List.js

var content_types = [
  'application/atom+xml',
  'application/ecmascript',
  'application/EDI-X12',
  'application/EDIFACT',
  'application/json',
  'application/javascript',
  'application/octet-stream', 
  'application/ogg',
  'application/pdf',
  'application/postscript',
  'application/rdf+xml',
  'application/rss+xml',
  'application/soap+xml',
  'application/font-woff',
  'application/xhtml+xml',
  'application/xml',
  'application/xml-dtd',
  'application/xop+xml',
  'application/zip',
  'application/gzip',
  'audio/basic',
  'audio/L24',
  'audio/mp4',
  'audio/mpeg',
  'audio/ogg',
  'audio/vorbis',
  'audio/vnd.rn-realaudio',
  'audio/vnd.wave',
  'audio/webm',
  'image/gif',
  'image/jpeg',
  'image/pjpeg',
  'image/png',
  'image/svg+xml',
  'image/tiff',
  'message/http',
  'message/imdn+xml',
  'message/partial',
  'message/rfc822',
  'model/example',
  'model/iges',
  'model/mesh',
  'model/vrml',
  'model/x3d+binary',
  'model/x3d+vrml',
  'model/x3d+xml',
  'multipart/mixed',
  'multipart/alternative',
  'multipart/related',
  'multipart/form-data',
  'multipart/signed',
  'multipart/encrypted',
  'text/cmd',
  'text/css',
  'text/csv',
  'text/html',
  'text/javascript',
  'text/plain',
  'text/vcard',
  'text/xml',
  'video/mpeg',
  'video/mp4',
  'video/ogg',
  'video/quicktime',
  'video/webm',
  'video/x-matroska',
  'video/x-ms-wmv',
  'video/x-flv',
  'application/vnd.oasis.opendocument.text',
  'application/vnd.oasis.opendocument.spreadsheet',
  'application/vnd.oasis.opendocument.presentation',
  'application/vnd.oasis.opendocument.graphics',
  'application/vnd.ms-excel',
  'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
  'application/vnd.ms-powerpoint',
  'application/vnd.ms-opentype',
  'application/vnd.ms-fontobject',
  'application/vnd.openxmlformats-officedocument.presentationml.presentation',
  'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
  'application/vnd.mozilla.xul+xml',
  'application/vnd.google-earth.kml+xml',
  'application/vnd.google-earth.kmz',
  'application/vnd.dart',
  'application/vnd.android.package-archive',
  'application/vnd.ms-xpsdocument',
  'application/x-7z-compressed',
  'application/x-deb',
  'application/x-dvi',
  'application/x-font-ttf',
  'application/x-javascript',
  'application/x-latex',
  'application/x-mpegURL',
  'application/x-rar-compressed',
  'application/x-shockwave-flash',
  'application/x-stuffit',
  'application/x-tar',
  'application/x-www-form-urlencode',
  'application/x-xpinstall',
  'audio/x-aac',
  'audio/x-caf',
  'image/x-xcf',
  'text/x-gwt-rpc',
  'text/x-jquery-tmpl',
  'text/x-markdown',
  'application/x-pkcs1'
];