<?php
/**
 * Return the mime type of a file based on its extension
 *
 * @since 3.2
 *
 * @param $extension
 *
 * @link  http://stackoverflow.com/a/14279336/1702561
 *
 * @return string
 */
function wpas_get_mime_type( $extension ) {

	$mime = $extension;

	$mime_types_map = array(
		'123'          => 'application/vnd.lotus-1-2-3',
		'3dml'         => 'text/vnd.in3d.3dml',
		'3ds'          => 'image/x-3ds',
		'3g2'          => 'video/3gpp2',
		'3gp'          => 'video/3gpp',
		'7z'           => 'application/x-7z-compressed',
		'aab'          => 'application/x-authorware-bin',
		'aac'          => 'audio/x-aac',
		'aam'          => 'application/x-authorware-map',
		'aas'          => 'application/x-authorware-seg',
		'abw'          => 'application/x-abiword',
		'ac'           => 'application/pkix-attr-cert',
		'acc'          => 'application/vnd.americandynamics.acc',
		'ace'          => 'application/x-ace-compressed',
		'acu'          => 'application/vnd.acucobol',
		'acutc'        => 'application/vnd.acucorp',
		'adp'          => 'audio/adpcm',
		'aep'          => 'application/vnd.audiograph',
		'afm'          => 'application/x-font-type1',
		'afp'          => 'application/vnd.ibm.modcap',
		'ahead'        => 'application/vnd.ahead.space',
		'ai'           => 'application/postscript',
		'aif'          => 'audio/x-aiff',
		'aifc'         => 'audio/x-aiff',
		'aiff'         => 'audio/x-aiff',
		'air'          => 'application/vnd.adobe.air-application-installer-package+zip',
		'ait'          => 'application/vnd.dvb.ait',
		'ami'          => 'application/vnd.amiga.ami',
		'apk'          => 'application/vnd.android.package-archive',
		'appcache'     => 'text/cache-manifest',
		'application'  => 'application/x-ms-application',
		'apr'          => 'application/vnd.lotus-approach',
		'arc'          => 'application/x-freearc',
		'asc'          => 'application/pgp-signature',
		'asf'          => 'video/x-ms-asf',
		'asm'          => 'text/x-asm',
		'aso'          => 'application/vnd.accpac.simply.aso',
		'asx'          => 'video/x-ms-asf',
		'atc'          => 'application/vnd.acucorp',
		'atom'         => 'application/atom+xml',
		'atomcat'      => 'application/atomcat+xml',
		'atomsvc'      => 'application/atomsvc+xml',
		'atx'          => 'application/vnd.antix.game-component',
		'au'           => 'audio/basic',
		'avi'          => 'video/x-msvideo',
		'aw'           => 'application/applixware',
		'azf'          => 'application/vnd.airzip.filesecure.azf',
		'azs'          => 'application/vnd.airzip.filesecure.azs',
		'azw'          => 'application/vnd.amazon.ebook',
		'bat'          => 'application/x-msdownload',
		'bcpio'        => 'application/x-bcpio',
		'bdf'          => 'application/x-font-bdf',
		'bdm'          => 'application/vnd.syncml.dm+wbxml',
		'bed'          => 'application/vnd.realvnc.bed',
		'bh2'          => 'application/vnd.fujitsu.oasysprs',
		'bin'          => 'application/octet-stream',
		'blb'          => 'application/x-blorb',
		'blorb'        => 'application/x-blorb',
		'bmi'          => 'application/vnd.bmi',
		'bmp'          => 'image/x-ms-bmp',
		'book'         => 'application/vnd.framemaker',
		'box'          => 'application/vnd.previewsystems.box',
		'boz'          => 'application/x-bzip2',
		'bpk'          => 'application/octet-stream',
		'btif'         => 'image/prs.btif',
		'buffer'       => 'application/octet-stream',
		'bz'           => 'application/x-bzip',
		'bz2'          => 'application/x-bzip2',
		'c'            => 'text/x-c',
		'c11amc'       => 'application/vnd.cluetrust.cartomobile-config',
		'c11amz'       => 'application/vnd.cluetrust.cartomobile-config-pkg',
		'c4d'          => 'application/vnd.clonk.c4group',
		'c4f'          => 'application/vnd.clonk.c4group',
		'c4g'          => 'application/vnd.clonk.c4group',
		'c4p'          => 'application/vnd.clonk.c4group',
		'c4u'          => 'application/vnd.clonk.c4group',
		'cab'          => 'application/vnd.ms-cab-compressed',
		'caf'          => 'audio/x-caf',
		'cap'          => 'application/vnd.tcpdump.pcap',
		'car'          => 'application/vnd.curl.car',
		'cat'          => 'application/vnd.ms-pki.seccat',
		'cb7'          => 'application/x-cbr',
		'cba'          => 'application/x-cbr',
		'cbr'          => 'application/x-cbr',
		'cbt'          => 'application/x-cbr',
		'cbz'          => 'application/x-cbr',
		'cc'           => 'text/x-c',
		'cct'          => 'application/x-director',
		'ccxml'        => 'application/ccxml+xml',
		'cdbcmsg'      => 'application/vnd.contact.cmsg',
		'cdf'          => 'application/x-netcdf',
		'cdkey'        => 'application/vnd.mediastation.cdkey',
		'cdmia'        => 'application/cdmi-capability',
		'cdmic'        => 'application/cdmi-container',
		'cdmid'        => 'application/cdmi-domain',
		'cdmio'        => 'application/cdmi-object',
		'cdmiq'        => 'application/cdmi-queue',
		'cdx'          => 'chemical/x-cdx',
		'cdxml'        => 'application/vnd.chemdraw+xml',
		'cdy'          => 'application/vnd.cinderella',
		'cer'          => 'application/pkix-cert',
		'cfs'          => 'application/x-cfs-compressed',
		'cgm'          => 'image/cgm',
		'chat'         => 'application/x-chat',
		'chm'          => 'application/vnd.ms-htmlhelp',
		'chrt'         => 'application/vnd.kde.kchart',
		'cif'          => 'chemical/x-cif',
		'cii'          => 'application/vnd.anser-web-certificate-issue-initiation',
		'cil'          => 'application/vnd.ms-artgalry',
		'cla'          => 'application/vnd.claymore',
		'class'        => 'application/java-vm',
		'clkk'         => 'application/vnd.crick.clicker.keyboard',
		'clkp'         => 'application/vnd.crick.clicker.palette',
		'clkt'         => 'application/vnd.crick.clicker.template',
		'clkw'         => 'application/vnd.crick.clicker.wordbank',
		'clkx'         => 'application/vnd.crick.clicker',
		'clp'          => 'application/x-msclip',
		'cmc'          => 'application/vnd.cosmocaller',
		'cmdf'         => 'chemical/x-cmdf',
		'cml'          => 'chemical/x-cml',
		'cmp'          => 'application/vnd.yellowriver-custom-menu',
		'cmx'          => 'image/x-cmx',
		'cod'          => 'application/vnd.rim.cod',
		'com'          => 'application/x-msdownload',
		'conf'         => 'text/plain',
		'cpio'         => 'application/x-cpio',
		'cpp'          => 'text/x-c',
		'cpt'          => 'application/mac-compactpro',
		'crd'          => 'application/x-mscardfile',
		'crl'          => 'application/pkix-crl',
		'crt'          => 'application/x-x509-ca-cert',
		'crx'          => 'application/x-chrome-extension',
		'cryptonote'   => 'application/vnd.rig.cryptonote',
		'csh'          => 'application/x-csh',
		'csml'         => 'chemical/x-csml',
		'csp'          => 'application/vnd.commonspace',
		'css'          => 'text/css',
		'cst'          => 'application/x-director',
		'csv'          => 'text/csv',
		'cu'           => 'application/cu-seeme',
		'curl'         => 'text/vnd.curl',
		'cww'          => 'application/prs.cww',
		'cxt'          => 'application/x-director',
		'cxx'          => 'text/x-c',
		'dae'          => 'model/vnd.collada+xml',
		'daf'          => 'application/vnd.mobius.daf',
		'dart'         => 'application/vnd.dart',
		'dataless'     => 'application/vnd.fdsn.seed',
		'davmount'     => 'application/davmount+xml',
		'dbk'          => 'application/docbook+xml',
		'dcr'          => 'application/x-director',
		'dcurl'        => 'text/vnd.curl.dcurl',
		'dd2'          => 'application/vnd.oma.dd2+xml',
		'ddd'          => 'application/vnd.fujixerox.ddd',
		'deb'          => 'application/x-debian-package',
		'def'          => 'text/plain',
		'deploy'       => 'application/octet-stream',
		'der'          => 'application/x-x509-ca-cert',
		'dfac'         => 'application/vnd.dreamfactory',
		'dgc'          => 'application/x-dgc-compressed',
		'dic'          => 'text/x-c',
		'dir'          => 'application/x-director',
		'dis'          => 'application/vnd.mobius.dis',
		'dist'         => 'application/octet-stream',
		'distz'        => 'application/octet-stream',
		'djv'          => 'image/vnd.djvu',
		'djvu'         => 'image/vnd.djvu',
		'dll'          => 'application/x-msdownload',
		'dmg'          => 'application/x-apple-diskimage',
		'dmp'          => 'application/vnd.tcpdump.pcap',
		'dms'          => 'application/octet-stream',
		'dna'          => 'application/vnd.dna',
		'doc'          => 'application/msword',
		'docm'         => 'application/vnd.ms-word.document.macroenabled.12',
		'docx'         => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
		'dot'          => 'application/msword',
		'dotm'         => 'application/vnd.ms-word.template.macroenabled.12',
		'dotx'         => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
		'dp'           => 'application/vnd.osgi.dp',
		'dpg'          => 'application/vnd.dpgraph',
		'dra'          => 'audio/vnd.dra',
		'dsc'          => 'text/prs.lines.tag',
		'dssc'         => 'application/dssc+der',
		'dtb'          => 'application/x-dtbook+xml',
		'dtd'          => 'application/xml-dtd',
		'dts'          => 'audio/vnd.dts',
		'dtshd'        => 'audio/vnd.dts.hd',
		'dump'         => 'application/octet-stream',
		'dvb'          => 'video/vnd.dvb.file',
		'dvi'          => 'application/x-dvi',
		'dwf'          => 'model/vnd.dwf',
		'dwg'          => 'image/vnd.dwg',
		'dxf'          => 'image/vnd.dxf',
		'dxp'          => 'application/vnd.spotfire.dxp',
		'dxr'          => 'application/x-director',
		'ecelp4800'    => 'audio/vnd.nuera.ecelp4800',
		'ecelp7470'    => 'audio/vnd.nuera.ecelp7470',
		'ecelp9600'    => 'audio/vnd.nuera.ecelp9600',
		'ecma'         => 'application/ecmascript',
		'edm'          => 'application/vnd.novadigm.edm',
		'edx'          => 'application/vnd.novadigm.edx',
		'efif'         => 'application/vnd.picsel',
		'ei6'          => 'application/vnd.pg.osasli',
		'elc'          => 'application/octet-stream',
		'emf'          => 'application/x-msmetafile',
		'eml'          => 'message/rfc822',
		'emma'         => 'application/emma+xml',
		'emz'          => 'application/x-msmetafile',
		'eol'          => 'audio/vnd.digital-winds',
		'eot'          => 'application/vnd.ms-fontobject',
		'eps'          => 'application/postscript',
		'epub'         => 'application/epub+zip',
		'es3'          => 'application/vnd.eszigno3+xml',
		'esa'          => 'application/vnd.osgi.subsystem',
		'esf'          => 'application/vnd.epson.esf',
		'et3'          => 'application/vnd.eszigno3+xml',
		'etx'          => 'text/x-setext',
		'eva'          => 'application/x-eva',
		'event-stream' => 'text/event-stream',
		'evy'          => 'application/x-envoy',
		'exe'          => 'application/x-msdownload',
		'exi'          => 'application/exi',
		'ext'          => 'application/vnd.novadigm.ext',
		'ez'           => 'application/andrew-inset',
		'ez2'          => 'application/vnd.ezpix-album',
		'ez3'          => 'application/vnd.ezpix-package',
		'f'            => 'text/x-fortran',
		'f4v'          => 'video/x-f4v',
		'f77'          => 'text/x-fortran',
		'f90'          => 'text/x-fortran',
		'fbs'          => 'image/vnd.fastbidsheet',
		'fcdt'         => 'application/vnd.adobe.formscentral.fcdt',
		'fcs'          => 'application/vnd.isac.fcs',
		'fdf'          => 'application/vnd.fdf',
		'fe_launch'    => 'application/vnd.denovo.fcselayout-link',
		'fg5'          => 'application/vnd.fujitsu.oasysgp',
		'fgd'          => 'application/x-director',
		'fh'           => 'image/x-freehand',
		'fh4'          => 'image/x-freehand',
		'fh5'          => 'image/x-freehand',
		'fh7'          => 'image/x-freehand',
		'fhc'          => 'image/x-freehand',
		'fig'          => 'application/x-xfig',
		'flac'         => 'audio/flac',
		'fli'          => 'video/x-fli',
		'flo'          => 'application/vnd.micrografx.flo',
		'flv'          => 'video/x-flv',
		'flw'          => 'application/vnd.kde.kivio',
		'flx'          => 'text/vnd.fmi.flexstor',
		'fly'          => 'text/vnd.fly',
		'fm'           => 'application/vnd.framemaker',
		'fnc'          => 'application/vnd.frogans.fnc',
		'for'          => 'text/x-fortran',
		'fpx'          => 'image/vnd.fpx',
		'frame'        => 'application/vnd.framemaker',
		'fsc'          => 'application/vnd.fsc.weblaunch',
		'fst'          => 'image/vnd.fst',
		'ftc'          => 'application/vnd.fluxtime.clip',
		'fti'          => 'application/vnd.anser-web-funds-transfer-initiation',
		'fvt'          => 'video/vnd.fvt',
		'fxp'          => 'application/vnd.adobe.fxp',
		'fxpl'         => 'application/vnd.adobe.fxp',
		'fzs'          => 'application/vnd.fuzzysheet',
		'g2w'          => 'application/vnd.geoplan',
		'g3'           => 'image/g3fax',
		'g3w'          => 'application/vnd.geospace',
		'gac'          => 'application/vnd.groove-account',
		'gam'          => 'application/x-tads',
		'gbr'          => 'application/rpki-ghostbusters',
		'gca'          => 'application/x-gca-compressed',
		'gdl'          => 'model/vnd.gdl',
		'geo'          => 'application/vnd.dynageo',
		'gex'          => 'application/vnd.geometry-explorer',
		'ggb'          => 'application/vnd.geogebra.file',
		'ggt'          => 'application/vnd.geogebra.tool',
		'ghf'          => 'application/vnd.groove-help',
		'gif'          => 'image/gif',
		'gim'          => 'application/vnd.groove-identity-message',
		'gml'          => 'application/gml+xml',
		'gmx'          => 'application/vnd.gmx',
		'gnumeric'     => 'application/x-gnumeric',
		'gph'          => 'application/vnd.flographit',
		'gpx'          => 'application/gpx+xml',
		'gqf'          => 'application/vnd.grafeq',
		'gqs'          => 'application/vnd.grafeq',
		'gram'         => 'application/srgs',
		'gramps'       => 'application/x-gramps-xml',
		'gre'          => 'application/vnd.geometry-explorer',
		'grv'          => 'application/vnd.groove-injector',
		'grxml'        => 'application/srgs+xml',
		'gsf'          => 'application/x-font-ghostscript',
		'gtar'         => 'application/x-gtar',
		'gtm'          => 'application/vnd.groove-tool-message',
		'gtw'          => 'model/vnd.gtw',
		'gv'           => 'text/vnd.graphviz',
		'gxf'          => 'application/gxf',
		'gxt'          => 'application/vnd.geonext',
		'h'            => 'text/x-c',
		'h261'         => 'video/h261',
		'h263'         => 'video/h263',
		'h264'         => 'video/h264',
		'hal'          => 'application/vnd.hal+xml',
		'hbci'         => 'application/vnd.hbci',
		'hdf'          => 'application/x-hdf',
		'hh'           => 'text/x-c',
		'hlp'          => 'application/winhlp',
		'hpgl'         => 'application/vnd.hp-hpgl',
		'hpid'         => 'application/vnd.hp-hpid',
		'hps'          => 'application/vnd.hp-hps',
		'hqx'          => 'application/mac-binhex40',
		'htc'          => 'text/x-component',
		'htke'         => 'application/vnd.kenameaapp',
		'htm'          => 'text/html',
		'html'         => 'text/html',
		'hvd'          => 'application/vnd.yamaha.hv-dic',
		'hvp'          => 'application/vnd.yamaha.hv-voice',
		'hvs'          => 'application/vnd.yamaha.hv-script',
		'i2g'          => 'application/vnd.intergeo',
		'icc'          => 'application/vnd.iccprofile',
		'ice'          => 'x-conference/x-cooltalk',
		'icm'          => 'application/vnd.iccprofile',
		'ico'          => 'image/x-icon',
		'ics'          => 'text/calendar',
		'ief'          => 'image/ief',
		'ifb'          => 'text/calendar',
		'ifm'          => 'application/vnd.shana.informed.formdata',
		'iges'         => 'model/iges',
		'igl'          => 'application/vnd.igloader',
		'igm'          => 'application/vnd.insors.igm',
		'igs'          => 'model/iges',
		'igx'          => 'application/vnd.micrografx.igx',
		'iif'          => 'application/vnd.shana.informed.interchange',
		'imp'          => 'application/vnd.accpac.simply.imp',
		'ims'          => 'application/vnd.ms-ims',
		'in'           => 'text/plain',
		'ink'          => 'application/inkml+xml',
		'inkml'        => 'application/inkml+xml',
		'install'      => 'application/x-install-instructions',
		'iota'         => 'application/vnd.astraea-software.iota',
		'ipfix'        => 'application/ipfix',
		'ipk'          => 'application/vnd.shana.informed.package',
		'irm'          => 'application/vnd.ibm.rights-management',
		'irp'          => 'application/vnd.irepository.package+xml',
		'iso'          => 'application/x-iso9660-image',
		'itp'          => 'application/vnd.shana.informed.formtemplate',
		'ivp'          => 'application/vnd.immervision-ivp',
		'ivu'          => 'application/vnd.immervision-ivu',
		'jad'          => 'text/vnd.sun.j2me.app-descriptor',
		'jam'          => 'application/vnd.jam',
		'jar'          => 'application/java-archive',
		'java'         => 'text/x-java-source',
		'jisp'         => 'application/vnd.jisp',
		'jlt'          => 'application/vnd.hp-jlyt',
		'jnlp'         => 'application/x-java-jnlp-file',
		'joda'         => 'application/vnd.joost.joda-archive',
		'jpe'          => 'image/jpeg',
		'jpeg'         => 'image/jpeg',
		'jpg'          => 'image/jpeg',
		'jpgm'         => 'video/jpm',
		'jpgv'         => 'video/jpeg',
		'jpm'          => 'video/jpm',
		'js'           => 'application/javascript',
		'json'         => 'application/json',
		'jsonml'       => 'application/jsonml+json',
		'kar'          => 'audio/midi',
		'karbon'       => 'application/vnd.kde.karbon',
		'kfo'          => 'application/vnd.kde.kformula',
		'kia'          => 'application/vnd.kidspiration',
		'kml'          => 'application/vnd.google-earth.kml+xml',
		'kmz'          => 'application/vnd.google-earth.kmz',
		'kne'          => 'application/vnd.kinar',
		'knp'          => 'application/vnd.kinar',
		'kon'          => 'application/vnd.kde.kontour',
		'kpr'          => 'application/vnd.kde.kpresenter',
		'kpt'          => 'application/vnd.kde.kpresenter',
		'kpxx'         => 'application/vnd.ds-keypoint',
		'ksp'          => 'application/vnd.kde.kspread',
		'ktr'          => 'application/vnd.kahootz',
		'ktx'          => 'image/ktx',
		'ktz'          => 'application/vnd.kahootz',
		'kwd'          => 'application/vnd.kde.kword',
		'kwt'          => 'application/vnd.kde.kword',
		'lasxml'       => 'application/vnd.las.las+xml',
		'latex'        => 'application/x-latex',
		'lbd'          => 'application/vnd.llamagraphics.life-balance.desktop',
		'lbe'          => 'application/vnd.llamagraphics.life-balance.exchange+xml',
		'les'          => 'application/vnd.hhe.lesson-player',
		'lha'          => 'application/x-lzh-compressed',
		'link66'       => 'application/vnd.route66.link66+xml',
		'list'         => 'text/plain',
		'list3820'     => 'application/vnd.ibm.modcap',
		'listafp'      => 'application/vnd.ibm.modcap',
		'lnk'          => 'application/x-ms-shortcut',
		'log'          => 'text/plain',
		'lostxml'      => 'application/lost+xml',
		'lrf'          => 'application/octet-stream',
		'lrm'          => 'application/vnd.ms-lrm',
		'ltf'          => 'application/vnd.frogans.ltf',
		'lua'          => 'text/x-lua',
		'luac'         => 'application/x-lua-bytecode',
		'lvp'          => 'audio/vnd.lucent.voice',
		'lwp'          => 'application/vnd.lotus-wordpro',
		'lzh'          => 'application/x-lzh-compressed',
		'm13'          => 'application/x-msmediaview',
		'm14'          => 'application/x-msmediaview',
		'm1v'          => 'video/mpeg',
		'm21'          => 'application/mp21',
		'm2a'          => 'audio/mpeg',
		'm2v'          => 'video/mpeg',
		'm3a'          => 'audio/mpeg',
		'm3u'          => 'audio/x-mpegurl',
		'm3u8'         => 'application/x-mpegURL',
		'm4a'          => 'audio/mp4',
		'm4p'          => 'application/mp4',
		'm4u'          => 'video/vnd.mpegurl',
		'm4v'          => 'video/x-m4v',
		'ma'           => 'application/mathematica',
		'mads'         => 'application/mads+xml',
		'mag'          => 'application/vnd.ecowin.chart',
		'maker'        => 'application/vnd.framemaker',
		'man'          => 'text/troff',
		'manifest'     => 'text/cache-manifest',
		'mar'          => 'application/octet-stream',
		'markdown'     => 'text/x-markdown',
		'mathml'       => 'application/mathml+xml',
		'mb'           => 'application/mathematica',
		'mbk'          => 'application/vnd.mobius.mbk',
		'mbox'         => 'application/mbox',
		'mc1'          => 'application/vnd.medcalcdata',
		'mcd'          => 'application/vnd.mcd',
		'mcurl'        => 'text/vnd.curl.mcurl',
		'md'           => 'text/x-markdown',
		'mdb'          => 'application/x-msaccess',
		'mdi'          => 'image/vnd.ms-modi',
		'me'           => 'text/troff',
		'mesh'         => 'model/mesh',
		'meta4'        => 'application/metalink4+xml',
		'metalink'     => 'application/metalink+xml',
		'mets'         => 'application/mets+xml',
		'mfm'          => 'application/vnd.mfmp',
		'mft'          => 'application/rpki-manifest',
		'mgp'          => 'application/vnd.osgeo.mapguide.package',
		'mgz'          => 'application/vnd.proteus.magazine',
		'mid'          => 'audio/midi',
		'midi'         => 'audio/midi',
		'mie'          => 'application/x-mie',
		'mif'          => 'application/vnd.mif',
		'mime'         => 'message/rfc822',
		'mj2'          => 'video/mj2',
		'mjp2'         => 'video/mj2',
		'mk3d'         => 'video/x-matroska',
		'mka'          => 'audio/x-matroska',
		'mkd'          => 'text/x-markdown',
		'mks'          => 'video/x-matroska',
		'mkv'          => 'video/x-matroska',
		'mlp'          => 'application/vnd.dolby.mlp',
		'mmd'          => 'application/vnd.chipnuts.karaoke-mmd',
		'mmf'          => 'application/vnd.smaf',
		'mmr'          => 'image/vnd.fujixerox.edmics-mmr',
		'mng'          => 'video/x-mng',
		'mny'          => 'application/x-msmoney',
		'mobi'         => 'application/x-mobipocket-ebook',
		'mods'         => 'application/mods+xml',
		'mov'          => 'video/quicktime',
		'movie'        => 'video/x-sgi-movie',
		'mp2'          => 'audio/mpeg',
		'mp21'         => 'application/mp21',
		'mp2a'         => 'audio/mpeg',
		'mp3'          => 'audio/mpeg',
		'mp4'          => 'video/mp4',
		'mp4a'         => 'audio/mp4',
		'mp4s'         => 'application/mp4',
		'mp4v'         => 'video/mp4',
		'mpc'          => 'application/vnd.mophun.certificate',
		'mpe'          => 'video/mpeg',
		'mpeg'         => 'video/mpeg',
		'mpg'          => 'video/mpeg',
		'mpg4'         => 'video/mp4',
		'mpga'         => 'audio/mpeg',
		'mpkg'         => 'application/vnd.apple.installer+xml',
		'mpm'          => 'application/vnd.blueice.multipass',
		'mpn'          => 'application/vnd.mophun.application',
		'mpp'          => 'application/vnd.ms-project',
		'mpt'          => 'application/vnd.ms-project',
		'mpy'          => 'application/vnd.ibm.minipay',
		'mqy'          => 'application/vnd.mobius.mqy',
		'mrc'          => 'application/marc',
		'mrcx'         => 'application/marcxml+xml',
		'ms'           => 'text/troff',
		'mscml'        => 'application/mediaservercontrol+xml',
		'mseed'        => 'application/vnd.fdsn.mseed',
		'mseq'         => 'application/vnd.mseq',
		'msf'          => 'application/vnd.epson.msf',
		'msg'          => 'application/vnd.ms-outlook',
		'msh'          => 'model/mesh',
		'msi'          => 'application/x-msdownload',
		'msl'          => 'application/vnd.mobius.msl',
		'msty'         => 'application/vnd.muvee.style',
		'mts'          => 'model/vnd.mts',
		'mus'          => 'application/vnd.musician',
		'musicxml'     => 'application/vnd.recordare.musicxml+xml',
		'mvb'          => 'application/x-msmediaview',
		'mwf'          => 'application/vnd.mfer',
		'mxf'          => 'application/mxf',
		'mxl'          => 'application/vnd.recordare.musicxml',
		'mxml'         => 'application/xv+xml',
		'mxs'          => 'application/vnd.triscape.mxs',
		'mxu'          => 'video/vnd.mpegurl',
		'n-gage'       => 'application/vnd.nokia.n-gage.symbian.install',
		'n3'           => 'text/n3',
		'nb'           => 'application/mathematica',
		'nbp'          => 'application/vnd.wolfram.player',
		'nc'           => 'application/x-netcdf',
		'ncx'          => 'application/x-dtbncx+xml',
		'nfo'          => 'text/x-nfo',
		'ngdat'        => 'application/vnd.nokia.n-gage.data',
		'nitf'         => 'application/vnd.nitf',
		'nlu'          => 'application/vnd.neurolanguage.nlu',
		'nml'          => 'application/vnd.enliven',
		'nnd'          => 'application/vnd.noblenet-directory',
		'nns'          => 'application/vnd.noblenet-sealer',
		'nnw'          => 'application/vnd.noblenet-web',
		'npx'          => 'image/vnd.net-fpx',
		'nsc'          => 'application/x-conference',
		'nsf'          => 'application/vnd.lotus-notes',
		'ntf'          => 'application/vnd.nitf',
		'nzb'          => 'application/x-nzb',
		'oa2'          => 'application/vnd.fujitsu.oasys2',
		'oa3'          => 'application/vnd.fujitsu.oasys3',
		'oas'          => 'application/vnd.fujitsu.oasys',
		'obd'          => 'application/x-msbinder',
		'obj'          => 'application/x-tgif',
		'oda'          => 'application/oda',
		'odb'          => 'application/vnd.oasis.opendocument.database',
		'odc'          => 'application/vnd.oasis.opendocument.chart',
		'odf'          => 'application/vnd.oasis.opendocument.formula',
		'odft'         => 'application/vnd.oasis.opendocument.formula-template',
		'odg'          => 'application/vnd.oasis.opendocument.graphics',
		'odi'          => 'application/vnd.oasis.opendocument.image',
		'odm'          => 'application/vnd.oasis.opendocument.text-master',
		'odp'          => 'application/vnd.oasis.opendocument.presentation',
		'ods'          => 'application/vnd.oasis.opendocument.spreadsheet',
		'odt'          => 'application/vnd.oasis.opendocument.text',
		'oga'          => 'audio/ogg',
		'ogg'          => 'audio/ogg',
		'ogv'          => 'video/ogg',
		'ogx'          => 'application/ogg',
		'omdoc'        => 'application/omdoc+xml',
		'onepkg'       => 'application/onenote',
		'onetmp'       => 'application/onenote',
		'onetoc'       => 'application/onenote',
		'onetoc2'      => 'application/onenote',
		'opf'          => 'application/oebps-package+xml',
		'opml'         => 'text/x-opml',
		'oprc'         => 'application/vnd.palm',
		'org'          => 'application/vnd.lotus-organizer',
		'osf'          => 'application/vnd.yamaha.openscoreformat',
		'osfpvg'       => 'application/vnd.yamaha.openscoreformat.osfpvg+xml',
		'otc'          => 'application/vnd.oasis.opendocument.chart-template',
		'otf'          => 'font/opentype',
		'otg'          => 'application/vnd.oasis.opendocument.graphics-template',
		'oth'          => 'application/vnd.oasis.opendocument.text-web',
		'oti'          => 'application/vnd.oasis.opendocument.image-template',
		'otp'          => 'application/vnd.oasis.opendocument.presentation-template',
		'ots'          => 'application/vnd.oasis.opendocument.spreadsheet-template',
		'ott'          => 'application/vnd.oasis.opendocument.text-template',
		'oxps'         => 'application/oxps',
		'oxt'          => 'application/vnd.openofficeorg.extension',
		'p'            => 'text/x-pascal',
		'p10'          => 'application/pkcs10',
		'p12'          => 'application/x-pkcs12',
		'p7b'          => 'application/x-pkcs7-certificates',
		'p7c'          => 'application/pkcs7-mime',
		'p7m'          => 'application/pkcs7-mime',
		'p7r'          => 'application/x-pkcs7-certreqresp',
		'p7s'          => 'application/pkcs7-signature',
		'p8'           => 'application/pkcs8',
		'pas'          => 'text/x-pascal',
		'paw'          => 'application/vnd.pawaafile',
		'pbd'          => 'application/vnd.powerbuilder6',
		'pbm'          => 'image/x-portable-bitmap',
		'pcap'         => 'application/vnd.tcpdump.pcap',
		'pcf'          => 'application/x-font-pcf',
		'pcl'          => 'application/vnd.hp-pcl',
		'pclxl'        => 'application/vnd.hp-pclxl',
		'pct'          => 'image/x-pict',
		'pcurl'        => 'application/vnd.curl.pcurl',
		'pcx'          => 'image/x-pcx',
		'pdb'          => 'application/vnd.palm',
		'pdf'          => 'application/pdf',
		'pfa'          => 'application/x-font-type1',
		'pfb'          => 'application/x-font-type1',
		'pfm'          => 'application/x-font-type1',
		'pfr'          => 'application/font-tdpfr',
		'pfx'          => 'application/x-pkcs12',
		'pgm'          => 'image/x-portable-graymap',
		'pgn'          => 'application/x-chess-pgn',
		'pgp'          => 'application/pgp-encrypted',
		'pic'          => 'image/x-pict',
		'pkg'          => 'application/octet-stream',
		'pki'          => 'application/pkixcmp',
		'pkipath'      => 'application/pkix-pkipath',
		'plb'          => 'application/vnd.3gpp.pic-bw-large',
		'plc'          => 'application/vnd.mobius.plc',
		'plf'          => 'application/vnd.pocketlearn',
		'pls'          => 'application/pls+xml',
		'pml'          => 'application/vnd.ctc-posml',
		'png'          => 'image/png',
		'pnm'          => 'image/x-portable-anymap',
		'portpkg'      => 'application/vnd.macports.portpkg',
		'pot'          => 'application/vnd.ms-powerpoint',
		'potm'         => 'application/vnd.ms-powerpoint.template.macroenabled.12',
		'potx'         => 'application/vnd.openxmlformats-officedocument.presentationml.template',
		'ppam'         => 'application/vnd.ms-powerpoint.addin.macroenabled.12',
		'ppd'          => 'application/vnd.cups-ppd',
		'ppm'          => 'image/x-portable-pixmap',
		'pps'          => 'application/vnd.ms-powerpoint',
		'ppsm'         => 'application/vnd.ms-powerpoint.slideshow.macroenabled.12',
		'ppsx'         => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
		'ppt'          => 'application/vnd.ms-powerpoint',
		'pptm'         => 'application/vnd.ms-powerpoint.presentation.macroenabled.12',
		'pptx'         => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
		'pqa'          => 'application/vnd.palm',
		'prc'          => 'application/x-mobipocket-ebook',
		'pre'          => 'application/vnd.lotus-freelance',
		'prf'          => 'application/pics-rules',
		'ps'           => 'application/postscript',
		'psb'          => 'application/vnd.3gpp.pic-bw-small',
		'psd'          => 'image/vnd.adobe.photoshop',
		'psf'          => 'application/x-font-linux-psf',
		'pskcxml'      => 'application/pskc+xml',
		'ptid'         => 'application/vnd.pvi.ptid1',
		'pub'          => 'application/x-mspublisher',
		'pvb'          => 'application/vnd.3gpp.pic-bw-var',
		'pwn'          => 'application/vnd.3m.post-it-notes',
		'pya'          => 'audio/vnd.ms-playready.media.pya',
		'pyv'          => 'video/vnd.ms-playready.media.pyv',
		'qam'          => 'application/vnd.epson.quickanime',
		'qbo'          => 'application/vnd.intu.qbo',
		'qfx'          => 'application/vnd.intu.qfx',
		'qps'          => 'application/vnd.publishare-delta-tree',
		'qt'           => 'video/quicktime',
		'qwd'          => 'application/vnd.quark.quarkxpress',
		'qwt'          => 'application/vnd.quark.quarkxpress',
		'qxb'          => 'application/vnd.quark.quarkxpress',
		'qxd'          => 'application/vnd.quark.quarkxpress',
		'qxl'          => 'application/vnd.quark.quarkxpress',
		'qxt'          => 'application/vnd.quark.quarkxpress',
		'ra'           => 'audio/x-pn-realaudio',
		'ram'          => 'audio/x-pn-realaudio',
		'rar'          => 'application/x-rar-compressed',
		'ras'          => 'image/x-cmu-raster',
		'rcprofile'    => 'application/vnd.ipunplugged.rcprofile',
		'rdf'          => 'application/rdf+xml',
		'rdz'          => 'application/vnd.data-vision.rdz',
		'rep'          => 'application/vnd.businessobjects',
		'res'          => 'application/x-dtbresource+xml',
		'rgb'          => 'image/x-rgb',
		'rif'          => 'application/reginfo+xml',
		'rip'          => 'audio/vnd.rip',
		'ris'          => 'application/x-research-info-systems',
		'rl'           => 'application/resource-lists+xml',
		'rlc'          => 'image/vnd.fujixerox.edmics-rlc',
		'rld'          => 'application/resource-lists-diff+xml',
		'rm'           => 'application/vnd.rn-realmedia',
		'rmi'          => 'audio/midi',
		'rmp'          => 'audio/x-pn-realaudio-plugin',
		'rms'          => 'application/vnd.jcp.javame.midlet-rms',
		'rmvb'         => 'application/vnd.rn-realmedia-vbr',
		'rnc'          => 'application/relax-ng-compact-syntax',
		'roa'          => 'application/rpki-roa',
		'roff'         => 'text/troff',
		'rp9'          => 'application/vnd.cloanto.rp9',
		'rpss'         => 'application/vnd.nokia.radio-presets',
		'rpst'         => 'application/vnd.nokia.radio-preset',
		'rq'           => 'application/sparql-query',
		'rs'           => 'application/rls-services+xml',
		'rsd'          => 'application/rsd+xml',
		'rss'          => 'application/rss+xml',
		'rtf'          => 'text/rtf',
		'rtx'          => 'text/richtext',
		's'            => 'text/x-asm',
		's3m'          => 'audio/s3m',
		'saf'          => 'application/vnd.yamaha.smaf-audio',
		'sbml'         => 'application/sbml+xml',
		'sc'           => 'application/vnd.ibm.secure-container',
		'scd'          => 'application/x-msschedule',
		'scm'          => 'application/vnd.lotus-screencam',
		'scq'          => 'application/scvp-cv-request',
		'scs'          => 'application/scvp-cv-response',
		'scurl'        => 'text/vnd.curl.scurl',
		'sda'          => 'application/vnd.stardivision.draw',
		'sdc'          => 'application/vnd.stardivision.calc',
		'sdd'          => 'application/vnd.stardivision.impress',
		'sdkd'         => 'application/vnd.solent.sdkm+xml',
		'sdkm'         => 'application/vnd.solent.sdkm+xml',
		'sdp'          => 'application/sdp',
		'sdw'          => 'application/vnd.stardivision.writer',
		'see'          => 'application/vnd.seemail',
		'seed'         => 'application/vnd.fdsn.seed',
		'sema'         => 'application/vnd.sema',
		'semd'         => 'application/vnd.semd',
		'semf'         => 'application/vnd.semf',
		'ser'          => 'application/java-serialized-object',
		'setpay'       => 'application/set-payment-initiation',
		'setreg'       => 'application/set-registration-initiation',
		'sfd-hdstx'    => 'application/vnd.hydrostatix.sof-data',
		'sfs'          => 'application/vnd.spotfire.sfs',
		'sfv'          => 'text/x-sfv',
		'sgi'          => 'image/sgi',
		'sgl'          => 'application/vnd.stardivision.writer-global',
		'sgm'          => 'text/sgml',
		'sgml'         => 'text/sgml',
		'sh'           => 'application/x-sh',
		'shar'         => 'application/x-shar',
		'shf'          => 'application/shf+xml',
		'sid'          => 'image/x-mrsid-image',
		'sig'          => 'application/pgp-signature',
		'sil'          => 'audio/silk',
		'silo'         => 'model/mesh',
		'sis'          => 'application/vnd.symbian.install',
		'sisx'         => 'application/vnd.symbian.install',
		'sit'          => 'application/x-stuffit',
		'sitx'         => 'application/x-stuffitx',
		'skd'          => 'application/vnd.koan',
		'skm'          => 'application/vnd.koan',
		'skp'          => 'application/vnd.koan',
		'skt'          => 'application/vnd.koan',
		'sldm'         => 'application/vnd.ms-powerpoint.slide.macroenabled.12',
		'sldx'         => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
		'slt'          => 'application/vnd.epson.salt',
		'sm'           => 'application/vnd.stepmania.stepchart',
		'smf'          => 'application/vnd.stardivision.math',
		'smi'          => 'application/smil+xml',
		'smil'         => 'application/smil+xml',
		'smv'          => 'video/x-smv',
		'smzip'        => 'application/vnd.stepmania.package',
		'snd'          => 'audio/basic',
		'snf'          => 'application/x-font-snf',
		'so'           => 'application/octet-stream',
		'spc'          => 'application/x-pkcs7-certificates',
		'spf'          => 'application/vnd.yamaha.smaf-phrase',
		'spl'          => 'application/x-futuresplash',
		'spot'         => 'text/vnd.in3d.spot',
		'spp'          => 'application/scvp-vp-response',
		'spq'          => 'application/scvp-vp-request',
		'spx'          => 'audio/ogg',
		'sql'          => 'application/x-sql',
		'src'          => 'application/x-wais-source',
		'srt'          => 'application/x-subrip',
		'sru'          => 'application/sru+xml',
		'srx'          => 'application/sparql-results+xml',
		'ssdl'         => 'application/ssdl+xml',
		'sse'          => 'application/vnd.kodak-descriptor',
		'ssf'          => 'application/vnd.epson.ssf',
		'ssml'         => 'application/ssml+xml',
		'st'           => 'application/vnd.sailingtracker.track',
		'stc'          => 'application/vnd.sun.xml.calc.template',
		'std'          => 'application/vnd.sun.xml.draw.template',
		'stf'          => 'application/vnd.wt.stf',
		'sti'          => 'application/vnd.sun.xml.impress.template',
		'stk'          => 'application/hyperstudio',
		'stl'          => 'application/vnd.ms-pki.stl',
		'str'          => 'application/vnd.pg.format',
		'stw'          => 'application/vnd.sun.xml.writer.template',
		'sub'          => 'text/vnd.dvb.subtitle',
		'sus'          => 'application/vnd.sus-calendar',
		'susp'         => 'application/vnd.sus-calendar',
		'sv4cpio'      => 'application/x-sv4cpio',
		'sv4crc'       => 'application/x-sv4crc',
		'svc'          => 'application/vnd.dvb.service',
		'svd'          => 'application/vnd.svd',
		'svg'          => 'image/svg+xml',
		'svgz'         => 'image/svg+xml',
		'swa'          => 'application/x-director',
		'swf'          => 'application/x-shockwave-flash',
		'swi'          => 'application/vnd.aristanetworks.swi',
		'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',
		't'            => 'text/troff',
		't3'           => 'application/x-t3vm-image',
		'taglet'       => 'application/vnd.mynfc',
		'tao'          => 'application/vnd.tao.intent-module-archive',
		'tar'          => 'application/x-tar',
		'tcap'         => 'application/vnd.3gpp2.tcap',
		'tcl'          => 'application/x-tcl',
		'teacher'      => 'application/vnd.smart.teacher',
		'tei'          => 'application/tei+xml',
		'teicorpus'    => 'application/tei+xml',
		'tex'          => 'application/x-tex',
		'texi'         => 'application/x-texinfo',
		'texinfo'      => 'application/x-texinfo',
		'text'         => 'text/plain',
		'tfi'          => 'application/thraud+xml',
		'tfm'          => 'application/x-tex-tfm',
		'tga'          => 'image/x-tga',
		'thmx'         => 'application/vnd.ms-officetheme',
		'tif'          => 'image/tiff',
		'tiff'         => 'image/tiff',
		'tmo'          => 'application/vnd.tmobile-livetv',
		'torrent'      => 'application/x-bittorrent',
		'tpl'          => 'application/vnd.groove-tool-template',
		'tpt'          => 'application/vnd.trid.tpt',
		'tr'           => 'text/troff',
		'tra'          => 'application/vnd.trueapp',
		'trm'          => 'application/x-msterminal',
		'ts'           => 'video/MP2T',
		'tsd'          => 'application/timestamped-data',
		'tsv'          => 'text/tab-separated-values',
		'ttc'          => 'application/x-font-ttf',
		'ttf'          => 'application/x-font-ttf',
		'ttl'          => 'text/turtle',
		'twd'          => 'application/vnd.simtech-mindmapper',
		'twds'         => 'application/vnd.simtech-mindmapper',
		'txd'          => 'application/vnd.genomatix.tuxedo',
		'txf'          => 'application/vnd.mobius.txf',
		'txt'          => 'text/plain',
		'u32'          => 'application/x-authorware-bin',
		'udeb'         => 'application/x-debian-package',
		'ufd'          => 'application/vnd.ufdl',
		'ufdl'         => 'application/vnd.ufdl',
		'ulx'          => 'application/x-glulx',
		'umj'          => 'application/vnd.umajin',
		'unityweb'     => 'application/vnd.unity',
		'uoml'         => 'application/vnd.uoml+xml',
		'uri'          => 'text/uri-list',
		'uris'         => 'text/uri-list',
		'urls'         => 'text/uri-list',
		'ustar'        => 'application/x-ustar',
		'utz'          => 'application/vnd.uiq.theme',
		'uu'           => 'text/x-uuencode',
		'uva'          => 'audio/vnd.dece.audio',
		'uvd'          => 'application/vnd.dece.data',
		'uvf'          => 'application/vnd.dece.data',
		'uvg'          => 'image/vnd.dece.graphic',
		'uvh'          => 'video/vnd.dece.hd',
		'uvi'          => 'image/vnd.dece.graphic',
		'uvm'          => 'video/vnd.dece.mobile',
		'uvp'          => 'video/vnd.dece.pd',
		'uvs'          => 'video/vnd.dece.sd',
		'uvt'          => 'application/vnd.dece.ttml+xml',
		'uvu'          => 'video/vnd.uvvu.mp4',
		'uvv'          => 'video/vnd.dece.video',
		'uvva'         => 'audio/vnd.dece.audio',
		'uvvd'         => 'application/vnd.dece.data',
		'uvvf'         => 'application/vnd.dece.data',
		'uvvg'         => 'image/vnd.dece.graphic',
		'uvvh'         => 'video/vnd.dece.hd',
		'uvvi'         => 'image/vnd.dece.graphic',
		'uvvm'         => 'video/vnd.dece.mobile',
		'uvvp'         => 'video/vnd.dece.pd',
		'uvvs'         => 'video/vnd.dece.sd',
		'uvvt'         => 'application/vnd.dece.ttml+xml',
		'uvvu'         => 'video/vnd.uvvu.mp4',
		'uvvv'         => 'video/vnd.dece.video',
		'uvvx'         => 'application/vnd.dece.unspecified',
		'uvvz'         => 'application/vnd.dece.zip',
		'uvx'          => 'application/vnd.dece.unspecified',
		'uvz'          => 'application/vnd.dece.zip',
		'vcard'        => 'text/vcard',
		'vcd'          => 'application/x-cdlink',
		'vcf'          => 'text/x-vcard',
		'vcg'          => 'application/vnd.groove-vcard',
		'vcs'          => 'text/x-vcalendar',
		'vcx'          => 'application/vnd.vcx',
		'vis'          => 'application/vnd.visionary',
		'viv'          => 'video/vnd.vivo',
		'vob'          => 'video/x-ms-vob',
		'vor'          => 'application/vnd.stardivision.writer',
		'vox'          => 'application/x-authorware-bin',
		'vrml'         => 'model/vrml',
		'vsd'          => 'application/vnd.visio',
		'vsf'          => 'application/vnd.vsf',
		'vss'          => 'application/vnd.visio',
		'vst'          => 'application/vnd.visio',
		'vsw'          => 'application/vnd.visio',
		'vtt'          => 'text/vtt',
		'vtu'          => 'model/vnd.vtu',
		'vxml'         => 'application/voicexml+xml',
		'w3d'          => 'application/x-director',
		'wad'          => 'application/x-doom',
		'wav'          => 'audio/x-wav',
		'wax'          => 'audio/x-ms-wax',
		'wbmp'         => 'image/vnd.wap.wbmp',
		'wbs'          => 'application/vnd.criticaltools.wbs+xml',
		'wbxml'        => 'application/vnd.wap.wbxml',
		'wcm'          => 'application/vnd.ms-works',
		'wdb'          => 'application/vnd.ms-works',
		'wdp'          => 'image/vnd.ms-photo',
		'weba'         => 'audio/webm',
		'webapp'       => 'application/x-web-app-manifest+json',
		'webm'         => 'video/webm',
		'webp'         => 'image/webp',
		'wg'           => 'application/vnd.pmi.widget',
		'wgt'          => 'application/widget',
		'wks'          => 'application/vnd.ms-works',
		'wm'           => 'video/x-ms-wm',
		'wma'          => 'audio/x-ms-wma',
		'wmd'          => 'application/x-ms-wmd',
		'wmf'          => 'application/x-msmetafile',
		'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',
		'wmx'          => 'video/x-ms-wmx',
		'wmz'          => 'application/x-msmetafile',
		'woff'         => 'application/x-font-woff',
		'wpd'          => 'application/vnd.wordperfect',
		'wpl'          => 'application/vnd.ms-wpl',
		'wps'          => 'application/vnd.ms-works',
		'wqd'          => 'application/vnd.wqd',
		'wri'          => 'application/x-mswrite',
		'wrl'          => 'model/vrml',
		'wsdl'         => 'application/wsdl+xml',
		'wspolicy'     => 'application/wspolicy+xml',
		'wtb'          => 'application/vnd.webturbo',
		'wvx'          => 'video/x-ms-wvx',
		'x32'          => 'application/x-authorware-bin',
		'x3d'          => 'model/x3d+xml',
		'x3db'         => 'model/x3d+binary',
		'x3dbz'        => 'model/x3d+binary',
		'x3dv'         => 'model/x3d+vrml',
		'x3dvz'        => 'model/x3d+vrml',
		'x3dz'         => 'model/x3d+xml',
		'xaml'         => 'application/xaml+xml',
		'xap'          => 'application/x-silverlight-app',
		'xar'          => 'application/vnd.xara',
		'xbap'         => 'application/x-ms-xbap',
		'xbd'          => 'application/vnd.fujixerox.docuworks.binder',
		'xbm'          => 'image/x-xbitmap',
		'xdf'          => 'application/xcap-diff+xml',
		'xdm'          => 'application/vnd.syncml.dm+xml',
		'xdp'          => 'application/vnd.adobe.xdp+xml',
		'xdssc'        => 'application/dssc+xml',
		'xdw'          => 'application/vnd.fujixerox.docuworks',
		'xenc'         => 'application/xenc+xml',
		'xer'          => 'application/patch-ops-error+xml',
		'xfdf'         => 'application/vnd.adobe.xfdf',
		'xfdl'         => 'application/vnd.xfdl',
		'xht'          => 'application/xhtml+xml',
		'xhtml'        => 'application/xhtml+xml',
		'xhvml'        => 'application/xv+xml',
		'xif'          => 'image/vnd.xiff',
		'xla'          => 'application/vnd.ms-excel',
		'xlam'         => 'application/vnd.ms-excel.addin.macroenabled.12',
		'xlc'          => 'application/vnd.ms-excel',
		'xlf'          => 'application/x-xliff+xml',
		'xlm'          => 'application/vnd.ms-excel',
		'xls'          => 'application/vnd.ms-excel',
		'xlsb'         => 'application/vnd.ms-excel.sheet.binary.macroenabled.12',
		'xlsm'         => 'application/vnd.ms-excel.sheet.macroenabled.12',
		'xlsx'         => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
		'xlt'          => 'application/vnd.ms-excel',
		'xltm'         => 'application/vnd.ms-excel.template.macroenabled.12',
		'xltx'         => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
		'xlw'          => 'application/vnd.ms-excel',
		'xm'           => 'audio/xm',
		'xml'          => 'application/xml',
		'xo'           => 'application/vnd.olpc-sugar',
		'xop'          => 'application/xop+xml',
		'xpi'          => 'application/x-xpinstall',
		'xpl'          => 'application/xproc+xml',
		'xpm'          => 'image/x-xpixmap',
		'xpr'          => 'application/vnd.is-xpr',
		'xps'          => 'application/vnd.ms-xpsdocument',
		'xpw'          => 'application/vnd.intercon.formnet',
		'xpx'          => 'application/vnd.intercon.formnet',
		'xsl'          => 'application/xml',
		'xslt'         => 'application/xslt+xml',
		'xsm'          => 'application/vnd.syncml+xml',
		'xspf'         => 'application/xspf+xml',
		'xul'          => 'application/vnd.mozilla.xul+xml',
		'xvm'          => 'application/xv+xml',
		'xvml'         => 'application/xv+xml',
		'xwd'          => 'image/x-xwindowdump',
		'xyz'          => 'chemical/x-xyz',
		'xz'           => 'application/x-xz',
		'yang'         => 'application/yang',
		'yin'          => 'application/yin+xml',
		'z1'           => 'application/x-zmachine',
		'z2'           => 'application/x-zmachine',
		'z3'           => 'application/x-zmachine',
		'z4'           => 'application/x-zmachine',
		'z5'           => 'application/x-zmachine',
		'z6'           => 'application/x-zmachine',
		'z7'           => 'application/x-zmachine',
		'z8'           => 'application/x-zmachine',
		'zaz'          => 'application/vnd.zzazz.deck+xml',
		'zip'          => 'application/zip',
		'zir'          => 'application/vnd.zul',
		'zirz'         => 'application/vnd.zul',
		'zmm'          => 'application/vnd.handheld-entertainment+xml',
		'k'	       => 'text/plain',
		'raw'	       => 'image/x-raw',
		'dyn'	       => 'text/plain'
	);

	if ( array_key_exists( $extension, $mime_types_map ) ) {
		$mime = $mime_types_map[ $extension ];
	}

	return $mime;

}