diff --git a/SessionUtilitiesKit/Media/UTType+Utilities.swift b/SessionUtilitiesKit/Media/UTType+Utilities.swift
index 7765a28332b..64aef20b74b 100644
--- a/SessionUtilitiesKit/Media/UTType+Utilities.swift
+++ b/SessionUtilitiesKit/Media/UTType+Utilities.swift
@@ -121,9 +121,7 @@ public extension UTType {
         // extension .mp4 instead of .m4a.
         guard
             let mimeType: String = preferredMIMEType,
-            let fileExtension: String = UTType.genericExtensionTypesToMimeTypes
-                .first(where: { _, value in value == mimeType })?
-                .key
+            let fileExtension: String = UTType.genericMimeTypesToExtensionTypes[mimeType]
         else { return preferredFilenameExtension }
         
         return fileExtension
@@ -196,6 +194,1067 @@ public extension UTType {
         return UTType.genericExtensionTypesToMimeTypes[fileExtension]
     }
     
+    private static let genericMimeTypesToExtensionTypes: [String: String] = [
+        "application/acad" : "dwg",
+        "application/andrew-inset" : "ez",
+        "application/applixware" : "aw",
+        "application/arj" : "arj",
+        "application/atom+xml" : "atom",
+        "application/atomcat+xml" : "atomcat",
+        "application/atomsvc+xml" : "atomsvc",
+        "application/binhex" : "hqx",
+        "application/binhex4" : "hqx",
+        "application/book" : "book",
+        "application/ccxml+xml" : "ccxml",
+        "application/cdf" : "cdf",
+        "application/cdmi-capability" : "cdmia",
+        "application/cdmi-container" : "cdmic",
+        "application/cdmi-domain" : "cdmid",
+        "application/cdmi-object" : "cdmio",
+        "application/cdmi-queue" : "cdmiq",
+        "application/clariscad" : "ccad",
+        "application/commonground" : "dp",
+        "application/cu-seeme" : "cu",
+        "application/davmount+xml" : "davmount",
+        "application/docbook+xml" : "dbk",
+        "application/drafting" : "drw",
+        "application/dsptype" : "tsp",
+        "application/dssc+der" : "dssc",
+        "application/dssc+xml" : "xdssc",
+        "application/dxf" : "dxf",
+        "application/ecmascript" : "js",
+        "application/emma+xml" : "emma",
+        "application/envoy" : "evy",
+        "application/epub+zip" : "epub",
+        "application/excel" : "xls",
+        "application/exi" : "exi",
+        "application/font-tdpfr" : "pfr",
+        "application/font-woff" : "woff",
+        "application/fractals" : "fif",
+        "application/freeloader" : "frl",
+        "application/futuresplash" : "spl",
+        "application/gml+xml" : "gml",
+        "application/gnutar" : "tgz",
+        "application/gpx+xml" : "gpx",
+        "application/groupwise" : "vew",
+        "application/gxf" : "gxf",
+        "application/hlp" : "hlp",
+        "application/hta" : "hta",
+        "application/hyperstudio" : "stk",
+        "application/i-deas" : "unv",
+        "application/iges" : "iges",
+        "application/inf" : "inf",
+        "application/inkml+xml" : "ink",
+        "application/internet-property-stream" : "acx",
+        "application/ipfix" : "ipfix",
+        "application/java" : "class",
+        "application/java-archive" : "jar",
+        "application/java-byte-code" : "class",
+        "application/java-serialized-object" : "ser",
+        "application/java-vm" : "class",
+        "application/javascript" : "js",
+        "application/json" : "json",
+        "application/jsonml+json" : "jsonml",
+        "application/lha" : "lha",
+        "application/lost+xml" : "lostxml",
+        "application/lzx" : "lzx",
+        "application/mac-binary" : "bin",
+        "application/mac-binhex" : "hqx",
+        "application/mac-binhex40" : "hqx",
+        "application/mac-compactpro" : "cpt",
+        "application/macbinary" : "bin",
+        "application/mads+xml" : "mads",
+        "application/marc" : "mrc",
+        "application/marcxml+xml" : "mrcx",
+        "application/mathematica" : "ma",
+        "application/mathml+xml" : "mathml",
+        "application/mbedlet" : "mbd",
+        "application/mbox" : "mbox",
+        "application/mcad" : "mcd",
+        "application/mediaservercontrol+xml" : "mscml",
+        "application/metalink+xml" : "metalink",
+        "application/metalink4+xml" : "meta4",
+        "application/mets+xml" : "mets",
+        "application/mime" : "aps",
+        "application/mods+xml" : "mods",
+        "application/mp21" : "m21",
+        "application/mp4" : "mp4",
+        "application/mspowerpoint" : "ppt",
+        "application/msword" : "doc",
+        "application/mswrite" : "wri",
+        "application/mxf" : "mxf",
+        "application/netmc" : "mcp",
+        "application/octet-stream" : "bin",
+        "application/oda" : "oda",
+        "application/oebps-package+xml" : "opf",
+        "application/ogg" : "oga",
+        "application/olescript" : "axs",
+        "application/omdoc+xml" : "omdoc",
+        "application/onenote" : "onetoc",
+        "application/oxps" : "oxps",
+        "application/patch-ops-error+xml" : "xer",
+        "application/pdf" : "pdf",
+        "application/pgp-encrypted" : "pgp",
+        "application/pgp-signature" : "sig",
+        "application/pics-rules" : "prf",
+        "application/pkcs-12" : "p12",
+        "application/pkcs-crl" : "crl",
+        "application/pkcs10" : "p10",
+        "application/pkcs7-mime" : "p7m",
+        "application/pkcs7-signature" : "p7s",
+        "application/pkcs8" : "p8",
+        "application/pkix-attr-cert" : "ac",
+        "application/pkix-cert" : "cer",
+        "application/pkix-crl" : "crl",
+        "application/pkix-pkipath" : "pkipath",
+        "application/pkixcmp" : "pki",
+        "application/plain" : "text",
+        "application/pls+xml" : "pls",
+        "application/postscript" : "ps",
+        "application/powerpoint" : "ppt",
+        "application/prs.cww" : "cww",
+        "application/pskc+xml" : "pskcxml",
+        "application/rdf+xml" : "rdf",
+        "application/reginfo+xml" : "rif",
+        "application/relax-ng-compact-syntax" : "rnc",
+        "application/resource-lists+xml" : "rl",
+        "application/resource-lists-diff+xml" : "rld",
+        "application/ringing-tones" : "rng",
+        "application/rls-services+xml" : "rs",
+        "application/rpki-ghostbusters" : "gbr",
+        "application/rpki-manifest" : "mft",
+        "application/rpki-roa" : "roa",
+        "application/rsd+xml" : "rsd",
+        "application/rss+xml" : "rss",
+        "application/rtf" : "rtf",
+        "application/sbml+xml" : "sbml",
+        "application/scvp-cv-request" : "scq",
+        "application/scvp-cv-response" : "scs",
+        "application/scvp-vp-request" : "spq",
+        "application/scvp-vp-response" : "spp",
+        "application/sdp" : "sdp",
+        "application/sea" : "sea",
+        "application/set" : "set",
+        "application/set-payment-initiation" : "setpay",
+        "application/set-registration-initiation" : "setreg",
+        "application/shf+xml" : "shf",
+        "application/sla" : "stl",
+        "application/smil" : "smi",
+        "application/smil+xml" : "smi",
+        "application/solids" : "sol",
+        "application/sounder" : "sdr",
+        "application/sparql-query" : "rq",
+        "application/sparql-results+xml" : "srx",
+        "application/srgs" : "gram",
+        "application/srgs+xml" : "grxml",
+        "application/sru+xml" : "sru",
+        "application/ssdl+xml" : "ssdl",
+        "application/ssml+xml" : "ssml",
+        "application/step" : "step",
+        "application/streamingmedia" : "ssm",
+        "application/tei+xml" : "tei",
+        "application/thraud+xml" : "tfi",
+        "application/timestamped-data" : "tsd",
+        "application/toolbook" : "tbk",
+        "application/vda" : "vda",
+        "application/vnd.3gpp.pic-bw-large" : "plb",
+        "application/vnd.3gpp.pic-bw-small" : "psb",
+        "application/vnd.3gpp.pic-bw-var" : "pvb",
+        "application/vnd.3gpp2.tcap" : "tcap",
+        "application/vnd.3m.post-it-notes" : "pwn",
+        "application/vnd.accpac.simply.aso" : "aso",
+        "application/vnd.accpac.simply.imp" : "imp",
+        "application/vnd.acucobol" : "acu",
+        "application/vnd.acucorp" : "atc",
+        "application/vnd.adobe.air-application-installer-package+zip" : "air",
+        "application/vnd.adobe.formscentral.fcdt" : "fcdt",
+        "application/vnd.adobe.fxp" : "fxp",
+        "application/vnd.adobe.xdp+xml" : "xdp",
+        "application/vnd.adobe.xfdf" : "xfdf",
+        "application/vnd.ahead.space" : "ahead",
+        "application/vnd.airzip.filesecure.azf" : "azf",
+        "application/vnd.airzip.filesecure.azs" : "azs",
+        "application/vnd.amazon.ebook" : "azw",
+        "application/vnd.americandynamics.acc" : "acc",
+        "application/vnd.amiga.ami" : "ami",
+        "application/vnd.android.package-archive" : "apk",
+        "application/vnd.anser-web-certificate-issue-initiation" : "cii",
+        "application/vnd.anser-web-funds-transfer-initiation" : "fti",
+        "application/vnd.antix.game-component" : "atx",
+        "application/vnd.apple.installer+xml" : "mpkg",
+        "application/vnd.apple.mpegurl" : "m3u8",
+        "application/vnd.aristanetworks.swi" : "swi",
+        "application/vnd.astraea-software.iota" : "iota",
+        "application/vnd.audiograph" : "aep",
+        "application/vnd.blueice.multipass" : "mpm",
+        "application/vnd.bmi" : "bmi",
+        "application/vnd.businessobjects" : "rep",
+        "application/vnd.chemdraw+xml" : "cdxml",
+        "application/vnd.chipnuts.karaoke-mmd" : "mmd",
+        "application/vnd.cinderella" : "cdy",
+        "application/vnd.claymore" : "cla",
+        "application/vnd.cloanto.rp9" : "rp9",
+        "application/vnd.clonk.c4group" : "c4g",
+        "application/vnd.cluetrust.cartomobile-config" : "c11amc",
+        "application/vnd.cluetrust.cartomobile-config-pkg" : "c11amz",
+        "application/vnd.commonspace" : "csp",
+        "application/vnd.contact.cmsg" : "cdbcmsg",
+        "application/vnd.cosmocaller" : "cmc",
+        "application/vnd.crick.clicker" : "clkx",
+        "application/vnd.crick.clicker.keyboard" : "clkk",
+        "application/vnd.crick.clicker.palette" : "clkp",
+        "application/vnd.crick.clicker.template" : "clkt",
+        "application/vnd.crick.clicker.wordbank" : "clkw",
+        "application/vnd.criticaltools.wbs+xml" : "wbs",
+        "application/vnd.ctc-posml" : "pml",
+        "application/vnd.cups-ppd" : "ppd",
+        "application/vnd.curl.car" : "car",
+        "application/vnd.curl.pcurl" : "pcurl",
+        "application/vnd.dart" : "dart",
+        "application/vnd.data-vision.rdz" : "rdz",
+        "application/vnd.dece.data" : "uvf",
+        "application/vnd.dece.ttml+xml" : "uvt",
+        "application/vnd.dece.unspecified" : "uvx",
+        "application/vnd.dece.zip" : "uvz",
+        "application/vnd.denovo.fcselayout-link" : "fe_launch",
+        "application/vnd.dna" : "dna",
+        "application/vnd.dolby.mlp" : "mlp",
+        "application/vnd.dpgraph" : "dpg",
+        "application/vnd.dreamfactory" : "dfac",
+        "application/vnd.ds-keypoint" : "kpxx",
+        "application/vnd.dvb.ait" : "ait",
+        "application/vnd.dvb.service" : "svc",
+        "application/vnd.dynageo" : "geo",
+        "application/vnd.ecowin.chart" : "mag",
+        "application/vnd.enliven" : "nml",
+        "application/vnd.epson.esf" : "esf",
+        "application/vnd.epson.msf" : "msf",
+        "application/vnd.epson.quickanime" : "qam",
+        "application/vnd.epson.salt" : "slt",
+        "application/vnd.epson.ssf" : "ssf",
+        "application/vnd.eszigno3+xml" : "es3",
+        "application/vnd.ezpix-album" : "ez2",
+        "application/vnd.ezpix-package" : "ez3",
+        "application/vnd.fdf" : "fdf",
+        "application/vnd.fdsn.mseed" : "mseed",
+        "application/vnd.fdsn.seed" : "seed",
+        "application/vnd.flographit" : "gph",
+        "application/vnd.fluxtime.clip" : "ftc",
+        "application/vnd.framemaker" : "fm",
+        "application/vnd.frogans.fnc" : "fnc",
+        "application/vnd.frogans.ltf" : "ltf",
+        "application/vnd.fsc.weblaunch" : "fsc",
+        "application/vnd.fujitsu.oasys" : "oas",
+        "application/vnd.fujitsu.oasys2" : "oa2",
+        "application/vnd.fujitsu.oasys3" : "oa3",
+        "application/vnd.fujitsu.oasysgp" : "fg5",
+        "application/vnd.fujitsu.oasysprs" : "bh2",
+        "application/vnd.fujixerox.ddd" : "ddd",
+        "application/vnd.fujixerox.docuworks" : "xdw",
+        "application/vnd.fujixerox.docuworks.binder" : "xbd",
+        "application/vnd.fuzzysheet" : "fzs",
+        "application/vnd.genomatix.tuxedo" : "txd",
+        "application/vnd.geogebra.file" : "ggb",
+        "application/vnd.geogebra.tool" : "ggt",
+        "application/vnd.geometry-explorer" : "gex",
+        "application/vnd.geonext" : "gxt",
+        "application/vnd.geoplan" : "g2w",
+        "application/vnd.geospace" : "g3w",
+        "application/vnd.gmx" : "gmx",
+        "application/vnd.google-earth.kml+xml" : "kml",
+        "application/vnd.google-earth.kmz" : "kmz",
+        "application/vnd.grafeq" : "gqf",
+        "application/vnd.groove-account" : "gac",
+        "application/vnd.groove-help" : "ghf",
+        "application/vnd.groove-identity-message" : "gim",
+        "application/vnd.groove-injector" : "grv",
+        "application/vnd.groove-tool-message" : "gtm",
+        "application/vnd.groove-tool-template" : "tpl",
+        "application/vnd.groove-vcard" : "vcg",
+        "application/vnd.hal+xml" : "hal",
+        "application/vnd.handheld-entertainment+xml" : "zmm",
+        "application/vnd.hbci" : "hbci",
+        "application/vnd.hhe.lesson-player" : "les",
+        "application/vnd.hp-hpgl" : "hpgl",
+        "application/vnd.hp-hpid" : "hpid",
+        "application/vnd.hp-hps" : "hps",
+        "application/vnd.hp-jlyt" : "jlt",
+        "application/vnd.hp-pcl" : "pcl",
+        "application/vnd.hp-pclxl" : "pclxl",
+        "application/vnd.hydrostatix.sof-data" : "sfd-hdstx",
+        "application/vnd.ibm.minipay" : "mpy",
+        "application/vnd.ibm.modcap" : "afp",
+        "application/vnd.ibm.rights-management" : "irm",
+        "application/vnd.ibm.secure-container" : "sc",
+        "application/vnd.iccprofile" : "icc",
+        "application/vnd.igloader" : "igl",
+        "application/vnd.immervision-ivp" : "ivp",
+        "application/vnd.immervision-ivu" : "ivu",
+        "application/vnd.insors.igm" : "igm",
+        "application/vnd.intercon.formnet" : "xpw",
+        "application/vnd.intergeo" : "i2g",
+        "application/vnd.intu.qbo" : "qbo",
+        "application/vnd.intu.qfx" : "qfx",
+        "application/vnd.ipunplugged.rcprofile" : "rcprofile",
+        "application/vnd.irepository.package+xml" : "irp",
+        "application/vnd.is-xpr" : "xpr",
+        "application/vnd.isac.fcs" : "fcs",
+        "application/vnd.jam" : "jam",
+        "application/vnd.jcp.javame.midlet-rms" : "rms",
+        "application/vnd.jisp" : "jisp",
+        "application/vnd.joost.joda-archive" : "joda",
+        "application/vnd.kahootz" : "ktz",
+        "application/vnd.kde.karbon" : "karbon",
+        "application/vnd.kde.kchart" : "chrt",
+        "application/vnd.kde.kformula" : "kfo",
+        "application/vnd.kde.kivio" : "flw",
+        "application/vnd.kde.kontour" : "kon",
+        "application/vnd.kde.kpresenter" : "kpr",
+        "application/vnd.kde.kspread" : "ksp",
+        "application/vnd.kde.kword" : "kwd",
+        "application/vnd.kenameaapp" : "htke",
+        "application/vnd.kidspiration" : "kia",
+        "application/vnd.kinar" : "kne",
+        "application/vnd.koan" : "skp",
+        "application/vnd.kodak-descriptor" : "sse",
+        "application/vnd.las.las+xml" : "lasxml",
+        "application/vnd.llamagraphics.life-balance.desktop" : "lbd",
+        "application/vnd.llamagraphics.life-balance.exchange+xml" : "lbe",
+        "application/vnd.lotus-1-2-3" : "123",
+        "application/vnd.lotus-approach" : "apr",
+        "application/vnd.lotus-freelance" : "pre",
+        "application/vnd.lotus-notes" : "nsf",
+        "application/vnd.lotus-organizer" : "org",
+        "application/vnd.lotus-screencam" : "scm",
+        "application/vnd.lotus-wordpro" : "lwp",
+        "application/vnd.macports.portpkg" : "portpkg",
+        "application/vnd.mcd" : "mcd",
+        "application/vnd.medcalcdata" : "mc1",
+        "application/vnd.mediastation.cdkey" : "cdkey",
+        "application/vnd.mfer" : "mwf",
+        "application/vnd.mfmp" : "mfm",
+        "application/vnd.micrografx.flo" : "flo",
+        "application/vnd.micrografx.igx" : "igx",
+        "application/vnd.mif" : "mif",
+        "application/vnd.mobius.daf" : "daf",
+        "application/vnd.mobius.dis" : "dis",
+        "application/vnd.mobius.mbk" : "mbk",
+        "application/vnd.mobius.mqy" : "mqy",
+        "application/vnd.mobius.msl" : "msl",
+        "application/vnd.mobius.plc" : "plc",
+        "application/vnd.mobius.txf" : "txf",
+        "application/vnd.mophun.application" : "mpn",
+        "application/vnd.mophun.certificate" : "mpc",
+        "application/vnd.mozilla.xul+xml" : "xul",
+        "application/vnd.ms-artgalry" : "cil",
+        "application/vnd.ms-cab-compressed" : "cab",
+        "application/vnd.ms-excel" : "xls",
+        "application/vnd.ms-excel.addin.macroenabled.12" : "xlam",
+        "application/vnd.ms-excel.sheet.binary.macroenabled.12" : "xlsb",
+        "application/vnd.ms-excel.sheet.macroenabled.12" : "xlsm",
+        "application/vnd.ms-excel.template.macroenabled.12" : "xltm",
+        "application/vnd.ms-fontobject" : "eot",
+        "application/vnd.ms-htmlhelp" : "chm",
+        "application/vnd.ms-ims" : "ims",
+        "application/vnd.ms-lrm" : "lrm",
+        "application/vnd.ms-officetheme" : "thmx",
+        "application/vnd.ms-outlook" : "msg",
+        "application/vnd.ms-pki.certstore" : "sst",
+        "application/vnd.ms-pki.pko" : "pko",
+        "application/vnd.ms-pki.seccat" : "cat",
+        "application/vnd.ms-pki.stl" : "stl",
+        "application/vnd.ms-pkicertstore" : "sst",
+        "application/vnd.ms-pkiseccat" : "cat",
+        "application/vnd.ms-pkistl" : "stl",
+        "application/vnd.ms-powerpoint" : "ppt",
+        "application/vnd.ms-powerpoint.addin.macroenabled.12" : "ppam",
+        "application/vnd.ms-powerpoint.presentation.macroenabled.12" : "pptm",
+        "application/vnd.ms-powerpoint.slide.macroenabled.12" : "sldm",
+        "application/vnd.ms-powerpoint.slideshow.macroenabled.12" : "ppsm",
+        "application/vnd.ms-powerpoint.template.macroenabled.12" : "potm",
+        "application/vnd.ms-project" : "mpp",
+        "application/vnd.ms-word.document.macroenabled.12" : "docm",
+        "application/vnd.ms-word.template.macroenabled.12" : "dotm",
+        "application/vnd.ms-works" : "wps",
+        "application/vnd.ms-wpl" : "wpl",
+        "application/vnd.ms-xpsdocument" : "xps",
+        "application/vnd.mseq" : "mseq",
+        "application/vnd.musician" : "mus",
+        "application/vnd.muvee.style" : "msty",
+        "application/vnd.mynfc" : "taglet",
+        "application/vnd.neurolanguage.nlu" : "nlu",
+        "application/vnd.nitf" : "ntf",
+        "application/vnd.noblenet-directory" : "nnd",
+        "application/vnd.noblenet-sealer" : "nns",
+        "application/vnd.noblenet-web" : "nnw",
+        "application/vnd.nokia.configuration-message" : "ncm",
+        "application/vnd.nokia.n-gage.data" : "ngdat",
+        "application/vnd.nokia.n-gage.symbian.install" : "n-gage",
+        "application/vnd.nokia.radio-preset" : "rpst",
+        "application/vnd.nokia.radio-presets" : "rpss",
+        "application/vnd.nokia.ringing-tone" : "rng",
+        "application/vnd.novadigm.edm" : "edm",
+        "application/vnd.novadigm.edx" : "edx",
+        "application/vnd.novadigm.ext" : "ext",
+        "application/vnd.oasis.opendocument.chart" : "odc",
+        "application/vnd.oasis.opendocument.chart-template" : "otc",
+        "application/vnd.oasis.opendocument.database" : "odb",
+        "application/vnd.oasis.opendocument.formula" : "odf",
+        "application/vnd.oasis.opendocument.formula-template" : "odft",
+        "application/vnd.oasis.opendocument.graphics" : "odg",
+        "application/vnd.oasis.opendocument.graphics-template" : "otg",
+        "application/vnd.oasis.opendocument.image" : "odi",
+        "application/vnd.oasis.opendocument.image-template" : "oti",
+        "application/vnd.oasis.opendocument.presentation" : "odp",
+        "application/vnd.oasis.opendocument.presentation-template" : "otp",
+        "application/vnd.oasis.opendocument.spreadsheet" : "ods",
+        "application/vnd.oasis.opendocument.spreadsheet-template" : "ots",
+        "application/vnd.oasis.opendocument.text" : "odt",
+        "application/vnd.oasis.opendocument.text-master" : "odm",
+        "application/vnd.oasis.opendocument.text-template" : "ott",
+        "application/vnd.oasis.opendocument.text-web" : "oth",
+        "application/vnd.olpc-sugar" : "xo",
+        "application/vnd.oma.dd2+xml" : "dd2",
+        "application/vnd.openofficeorg.extension" : "oxt",
+        "application/vnd.openxmlformats-officedocument.presentationml.presentation" : "pptx",
+        "application/vnd.openxmlformats-officedocument.presentationml.slide" : "sldx",
+        "application/vnd.openxmlformats-officedocument.presentationml.slideshow" : "ppsx",
+        "application/vnd.openxmlformats-officedocument.presentationml.template" : "potx",
+        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" : "xlsx",
+        "application/vnd.openxmlformats-officedocument.spreadsheetml.template" : "xltx",
+        "application/vnd.openxmlformats-officedocument.wordprocessingml.document" : "docx",
+        "application/vnd.openxmlformats-officedocument.wordprocessingml.template" : "dotx",
+        "application/vnd.osgeo.mapguide.package" : "mgp",
+        "application/vnd.osgi.dp" : "dp",
+        "application/vnd.osgi.subsystem" : "esa",
+        "application/vnd.palm" : "pdb",
+        "application/vnd.pawaafile" : "paw",
+        "application/vnd.pg.format" : "str",
+        "application/vnd.pg.osasli" : "ei6",
+        "application/vnd.picsel" : "efif",
+        "application/vnd.pmi.widget" : "wg",
+        "application/vnd.pocketlearn" : "plf",
+        "application/vnd.powerbuilder6" : "pbd",
+        "application/vnd.previewsystems.box" : "box",
+        "application/vnd.proteus.magazine" : "mgz",
+        "application/vnd.publishare-delta-tree" : "qps",
+        "application/vnd.pvi.ptid1" : "ptid",
+        "application/vnd.quark.quarkxpress" : "qxd",
+        "application/vnd.realvnc.bed" : "bed",
+        "application/vnd.recordare.musicxml" : "mxl",
+        "application/vnd.recordare.musicxml+xml" : "musicxml",
+        "application/vnd.rig.cryptonote" : "cryptonote",
+        "application/vnd.rim.cod" : "cod",
+        "application/vnd.rn-realmedia" : "rm",
+        "application/vnd.rn-realmedia-vbr" : "rmvb",
+        "application/vnd.rn-realplayer" : "rnx",
+        "application/vnd.route66.link66+xml" : "link66",
+        "application/vnd.sailingtracker.track" : "st",
+        "application/vnd.seemail" : "see",
+        "application/vnd.sema" : "sema",
+        "application/vnd.semd" : "semd",
+        "application/vnd.semf" : "semf",
+        "application/vnd.shana.informed.formdata" : "ifm",
+        "application/vnd.shana.informed.formtemplate" : "itp",
+        "application/vnd.shana.informed.interchange" : "iif",
+        "application/vnd.shana.informed.package" : "ipk",
+        "application/vnd.simtech-mindmapper" : "twd",
+        "application/vnd.smaf" : "mmf",
+        "application/vnd.smart.teacher" : "teacher",
+        "application/vnd.solent.sdkm+xml" : "sdkm",
+        "application/vnd.spotfire.dxp" : "dxp",
+        "application/vnd.spotfire.sfs" : "sfs",
+        "application/vnd.stardivision.calc" : "sdc",
+        "application/vnd.stardivision.draw" : "sda",
+        "application/vnd.stardivision.impress" : "sdd",
+        "application/vnd.stardivision.math" : "smf",
+        "application/vnd.stardivision.writer" : "sdw",
+        "application/vnd.stardivision.writer-global" : "sgl",
+        "application/vnd.stepmania.package" : "smzip",
+        "application/vnd.stepmania.stepchart" : "sm",
+        "application/vnd.sun.xml.calc" : "sxc",
+        "application/vnd.sun.xml.calc.template" : "stc",
+        "application/vnd.sun.xml.draw" : "sxd",
+        "application/vnd.sun.xml.draw.template" : "std",
+        "application/vnd.sun.xml.impress" : "sxi",
+        "application/vnd.sun.xml.impress.template" : "sti",
+        "application/vnd.sun.xml.math" : "sxm",
+        "application/vnd.sun.xml.writer" : "sxw",
+        "application/vnd.sun.xml.writer.global" : "sxg",
+        "application/vnd.sun.xml.writer.template" : "stw",
+        "application/vnd.sus-calendar" : "sus",
+        "application/vnd.svd" : "svd",
+        "application/vnd.symbian.install" : "sis",
+        "application/vnd.syncml+xml" : "xsm",
+        "application/vnd.syncml.dm+wbxml" : "bdm",
+        "application/vnd.syncml.dm+xml" : "xdm",
+        "application/vnd.tao.intent-module-archive" : "tao",
+        "application/vnd.tcpdump.pcap" : "pcap",
+        "application/vnd.tmobile-livetv" : "tmo",
+        "application/vnd.trid.tpt" : "tpt",
+        "application/vnd.triscape.mxs" : "mxs",
+        "application/vnd.trueapp" : "tra",
+        "application/vnd.ufdl" : "ufd",
+        "application/vnd.uiq.theme" : "utz",
+        "application/vnd.umajin" : "umj",
+        "application/vnd.unity" : "unityweb",
+        "application/vnd.uoml+xml" : "uoml",
+        "application/vnd.vcx" : "vcx",
+        "application/vnd.visio" : "vsd",
+        "application/vnd.visio2013" : "vsdx",
+        "application/vnd.visionary" : "vis",
+        "application/vnd.vsf" : "vsf",
+        "application/vnd.wap.wbxml" : "wbxml",
+        "application/vnd.wap.wmlc" : "wmlc",
+        "application/vnd.wap.wmlscriptc" : "wmlsc",
+        "application/vnd.webturbo" : "wtb",
+        "application/vnd.wolfram.player" : "nbp",
+        "application/vnd.wordperfect" : "wpd",
+        "application/vnd.wqd" : "wqd",
+        "application/vnd.wt.stf" : "stf",
+        "application/vnd.xara" : "xar",
+        "application/vnd.xfdl" : "xfdl",
+        "application/vnd.yamaha.hv-dic" : "hvd",
+        "application/vnd.yamaha.hv-script" : "hvs",
+        "application/vnd.yamaha.hv-voice" : "hvp",
+        "application/vnd.yamaha.openscoreformat" : "osf",
+        "application/vnd.yamaha.openscoreformat.osfpvg+xml" : "osfpvg",
+        "application/vnd.yamaha.smaf-audio" : "saf",
+        "application/vnd.yamaha.smaf-phrase" : "spf",
+        "application/vnd.yellowriver-custom-menu" : "cmp",
+        "application/vnd.zul" : "zir",
+        "application/vnd.zzazz.deck+xml" : "zaz",
+        "application/vocaltec-media-desc" : "vmd",
+        "application/vocaltec-media-file" : "vmf",
+        "application/voicexml+xml" : "vxml",
+        "application/widget" : "wgt",
+        "application/winhlp" : "hlp",
+        "application/wordperfect" : "wp",
+        "application/wordperfect6.0" : "w60",
+        "application/wordperfect6.1" : "w61",
+        "application/wsdl+xml" : "wsdl",
+        "application/wspolicy+xml" : "wspolicy",
+        "application/x-123" : "wk1",
+        "application/x-7z-compressed" : "7z",
+        "application/x-abiword" : "abw",
+        "application/x-ace-compressed" : "ace",
+        "application/x-aim" : "aim",
+        "application/x-apple-diskimage" : "dmg",
+        "application/x-authorware-bin" : "aab",
+        "application/x-authorware-map" : "aam",
+        "application/x-authorware-seg" : "aas",
+        "application/x-bcpio" : "bcpio",
+        "application/x-binary" : "bin",
+        "application/x-binhex40" : "hqx",
+        "application/x-bittorrent" : "torrent",
+        "application/x-blorb" : "blb",
+        "application/x-bsh" : "sh",
+        "application/x-bytecode.elisp" : "elc",
+        "application/x-bytecode.python" : "pyc",
+        "application/x-bzip" : "bz",
+        "application/x-bzip2" : "bz2",
+        "application/x-cbr" : "cbr",
+        "application/x-cdf" : "cdf",
+        "application/x-cdlink" : "vcd",
+        "application/x-cfs-compressed" : "cfs",
+        "application/x-chat" : "chat",
+        "application/x-chess-pgn" : "pgn",
+        "application/x-cmu-raster" : "ras",
+        "application/x-cocoa" : "cco",
+        "application/x-compactpro" : "cpt",
+        "application/x-compress" : "z",
+        "application/x-conference" : "nsc",
+        "application/x-cpio" : "cpio",
+        "application/x-cpt" : "cpt",
+        "application/x-csh" : "csh",
+        "application/x-debian-package" : "deb",
+        "application/x-deepv" : "deepv",
+        "application/x-dgc-compressed" : "dgc",
+        "application/x-director" : "dir",
+        "application/x-doom" : "wad",
+        "application/x-dtbncx+xml" : "ncx",
+        "application/x-dtbook+xml" : "dtb",
+        "application/x-dtbresource+xml" : "res",
+        "application/x-dvi" : "dvi",
+        "application/x-elc" : "elc",
+        "application/x-envoy" : "evy",
+        "application/x-esrehber" : "es",
+        "application/x-eva" : "eva",
+        "application/x-excel" : "xls",
+        "application/x-font-bdf" : "bdf",
+        "application/x-font-ghostscript" : "gsf",
+        "application/x-font-linux-psf" : "psf",
+        "application/x-font-otf" : "otf",
+        "application/x-font-pcf" : "pcf",
+        "application/x-font-snf" : "snf",
+        "application/x-font-ttf" : "ttf",
+        "application/x-font-type1" : "pfa",
+        "application/x-font-woff" : "woff",
+        "application/x-frame" : "mif",
+        "application/x-freearc" : "arc",
+        "application/x-freelance" : "pre",
+        "application/x-futuresplash" : "spl",
+        "application/x-gca-compressed" : "gca",
+        "application/x-glulx" : "ulx",
+        "application/x-gnumeric" : "gnumeric",
+        "application/x-gramps-xml" : "gramps",
+        "application/x-gsp" : "gsp",
+        "application/x-gss" : "gss",
+        "application/x-gtar" : "gtar",
+        "application/x-gzip" : "gz",
+        "application/x-hdf" : "hdf",
+        "application/x-httpd-imap" : "imap",
+        "application/x-ima" : "ima",
+        "application/x-install-instructions" : "install",
+        "application/x-internett-signup" : "ins",
+        "application/x-inventor" : "iv",
+        "application/x-ip2" : "ip",
+        "application/x-iphone" : "iii",
+        "application/x-iso9660-image" : "iso",
+        "application/x-java-class" : "class",
+        "application/x-java-commerce" : "jcm",
+        "application/x-java-jnlp-file" : "jnlp",
+        "application/x-javascript" : "js",
+        "application/x-ksh" : "ksh",
+        "application/x-latex" : "ltx",
+        "application/x-lha" : "lha",
+        "application/x-lisp" : "lsp",
+        "application/x-livescreen" : "ivy",
+        "application/x-lotus" : "wq1",
+        "application/x-lotusscreencam" : "scm",
+        "application/x-lzh" : "lzh",
+        "application/x-lzh-compressed" : "lzh",
+        "application/x-lzx" : "lzx",
+        "application/x-mac-binhex40" : "hqx",
+        "application/x-macbinary" : "bin",
+        "application/x-magic-cap-package-1.0" : "mc$",
+        "application/x-mathcad" : "mcd",
+        "application/x-meme" : "mm",
+        "application/x-midi" : "midi",
+        "application/x-mie" : "mie",
+        "application/x-mif" : "mif",
+        "application/x-mix-transfer" : "nix",
+        "application/x-mobipocket-ebook" : "prc",
+        "application/x-mplayer2" : "asx",
+        "application/x-ms-application" : "application",
+        "application/x-ms-shortcut" : "lnk",
+        "application/x-ms-wmd" : "wmd",
+        "application/x-ms-wmz" : "wmz",
+        "application/x-ms-xbap" : "xbap",
+        "application/x-msaccess" : "mdb",
+        "application/x-msbinder" : "obd",
+        "application/x-mscardfile" : "crd",
+        "application/x-msclip" : "clp",
+        "application/x-msdownload" : "exe",
+        "application/x-msexcel" : "xls",
+        "application/x-msmediaview" : "mvb",
+        "application/x-msmetafile" : "wmf",
+        "application/x-msmoney" : "mny",
+        "application/x-mspowerpoint" : "ppt",
+        "application/x-mspublisher" : "pub",
+        "application/x-msschedule" : "scd",
+        "application/x-msterminal" : "trm",
+        "application/x-mswrite" : "wri",
+        "application/x-navi-animation" : "ani",
+        "application/x-navidoc" : "nvd",
+        "application/x-navimap" : "map",
+        "application/x-navistyle" : "stl",
+        "application/x-netcdf" : "nc",
+        "application/x-newton-compatible-pkg" : "pkg",
+        "application/x-nokia-9000-communicator-add-on-software" : "aos",
+        "application/x-nzb" : "nzb",
+        "application/x-omc" : "omc",
+        "application/x-omcdatamaker" : "omcd",
+        "application/x-omcregerator" : "omcr",
+        "application/x-pcl" : "pcl",
+        "application/x-pixclscript" : "plx",
+        "application/x-pkcs10" : "p10",
+        "application/x-pkcs12" : "p12",
+        "application/x-pkcs7-certificates" : "p7b",
+        "application/x-pkcs7-certreqresp" : "p7r",
+        "application/x-pkcs7-mime" : "p7m",
+        "application/x-pkcs7-signature" : "p7s",
+        "application/x-pointplus" : "css",
+        "application/x-portable-anymap" : "pnm",
+        "application/x-qpro" : "wb1",
+        "application/x-rar-compressed" : "rar",
+        "application/x-research-info-systems" : "ris",
+        "application/x-rtf" : "rtf",
+        "application/x-sdp" : "sdp",
+        "application/x-sea" : "sea",
+        "application/x-seelogo" : "sl",
+        "application/x-sh" : "sh",
+        "application/x-shar" : "shar",
+        "application/x-shockwave-flash" : "swf",
+        "application/x-silverlight-app" : "xap",
+        "application/x-sit" : "sit",
+        "application/x-sprite" : "spr",
+        "application/x-sql" : "sql",
+        "application/x-stuffit" : "sit",
+        "application/x-stuffitx" : "sitx",
+        "application/x-subrip" : "srt",
+        "application/x-sv4cpio" : "sv4cpio",
+        "application/x-sv4crc" : "sv4crc",
+        "application/x-t3vm-image" : "t3",
+        "application/x-tads" : "gam",
+        "application/x-tar" : "tar",
+        "application/x-tbook" : "tbk",
+        "application/x-tcl" : "tcl",
+        "application/x-tex" : "tex",
+        "application/x-tex-tfm" : "tfm",
+        "application/x-texinfo" : "texinfo",
+        "application/x-tgif" : "obj",
+        "application/x-troff-man" : "man",
+        "application/x-troff-me" : "me",
+        "application/x-troff-ms" : "ms",
+        "application/x-troff-msvideo" : "avi",
+        "application/x-ustar" : "ustar",
+        "application/x-visio" : "vsd",
+        "application/x-vnd.audioexplosion.mzz" : "mzz",
+        "application/x-vnd.ls-xpix" : "xpix",
+        "application/x-vrml" : "vrml",
+        "application/x-wais-source" : "src",
+        "application/x-winhelp" : "hlp",
+        "application/x-wintalk" : "wtk",
+        "application/x-wpwin" : "wpd",
+        "application/x-wri" : "wri",
+        "application/x-x509-ca-cert" : "crt",
+        "application/x-x509-user-cert" : "crt",
+        "application/x-xfig" : "fig",
+        "application/x-xliff+xml" : "xlf",
+        "application/x-xpinstall" : "xpi",
+        "application/x-xz" : "xz",
+        "application/x-zip-compressed" : "zip",
+        "application/x-zmachine" : "z1",
+        "application/xaml+xml" : "xaml",
+        "application/xcap-diff+xml" : "xdf",
+        "application/xenc+xml" : "xenc",
+        "application/xhtml+xml" : "xhtml",
+        "application/xml" : "xml",
+        "application/xml-dtd" : "dtd",
+        "application/xop+xml" : "xop",
+        "application/xproc+xml" : "xpl",
+        "application/xslt+xml" : "xslt",
+        "application/xspf+xml" : "xspf",
+        "application/xv+xml" : "mxml",
+        "application/yang" : "yang",
+        "application/yin+xml" : "yin",
+        "application/ynd.ms-pkipko" : "pko",
+        "application/zip" : "zip",
+        "audio/aac" : "aac",
+        "audio/adpcm" : "adp",
+        "audio/aiff" : "aiff",
+        "audio/basic" : "au",
+        "audio/it" : "it",
+        "audio/mid" : "rmi",
+        "audio/midi" : "midi",
+        "audio/mod" : "mod",
+        "audio/mp4" : "m4a",
+        "audio/mpeg" : "mpg",
+        "audio/mpeg3" : "mp3",
+        "audio/ogg" : "oga",
+        "audio/s3m" : "s3m",
+        "audio/silk" : "sil",
+        "audio/tsp-audio" : "tsi",
+        "audio/tsplayer" : "tsp",
+        "audio/vnd.dece.audio" : "uva",
+        "audio/vnd.digital-winds" : "eol",
+        "audio/vnd.dra" : "dra",
+        "audio/vnd.dts" : "dts",
+        "audio/vnd.dts.hd" : "dtshd",
+        "audio/vnd.lucent.voice" : "lvp",
+        "audio/vnd.ms-playready.media.pya" : "pya",
+        "audio/vnd.nuera.ecelp4800" : "ecelp4800",
+        "audio/vnd.nuera.ecelp7470" : "ecelp7470",
+        "audio/vnd.nuera.ecelp9600" : "ecelp9600",
+        "audio/vnd.qcelp" : "qcp",
+        "audio/vnd.rip" : "rip",
+        "audio/voc" : "voc",
+        "audio/voxware" : "vox",
+        "audio/wav" : "wav",
+        "audio/webm" : "weba",
+        "audio/x-aac" : "aac",
+        "audio/x-adpcm" : "snd",
+        "audio/x-aiff" : "aiff",
+        "audio/x-au" : "au",
+        "audio/x-caf" : "caf",
+        "audio/x-flac" : "flac",
+        "audio/x-gsm" : "gsm",
+        "audio/x-jam" : "jam",
+        "audio/x-liveaudio" : "lam",
+        "audio/x-matroska" : "mka",
+        "audio/x-mid" : "midi",
+        "audio/x-midi" : "midi",
+        "audio/x-mod" : "mod",
+        "audio/x-mpeg" : "mp2",
+        "audio/x-mpeg-3" : "mp3",
+        "audio/x-mpegurl" : "m3u",
+        "audio/x-mpequrl" : "m3u",
+        "audio/x-ms-wax" : "wax",
+        "audio/x-ms-wma" : "wma",
+        "audio/x-pn-realaudio" : "ram",
+        "audio/x-pn-realaudio-plugin" : "rmp",
+        "audio/x-psid" : "sid",
+        "audio/x-realaudio" : "ra",
+        "audio/x-twinvq" : "vqf",
+        "audio/x-vnd.audioexplosion.mjuicemediafile" : "mjf",
+        "audio/x-voc" : "voc",
+        "audio/x-wav" : "wav",
+        "audio/xm" : "xm",
+        "chemical/x-cdx" : "cdx",
+        "chemical/x-cif" : "cif",
+        "chemical/x-cmdf" : "cmdf",
+        "chemical/x-cml" : "cml",
+        "chemical/x-csml" : "csml",
+        "chemical/x-pdb" : "pdb",
+        "chemical/x-xyz" : "xyz",
+        "drawing/x-dwf" : "dwf",
+        "font/ttf" : "ttf",
+        "font/woff" : "woff",
+        "font/woff2" : "woff2",
+        "i-world/i-vrml" : "ivr",
+        "image/bmp" : "bmp",
+        "image/cgm" : "cgm",
+        "image/cis-cod" : "cod",
+        "image/fif" : "fif",
+        "image/g3fax" : "g3",
+        "image/gif" : "gif",
+        "image/heic" : "heic",
+        "image/heif" : "heif",
+        "image/ief" : "ief",
+        "image/jpeg" : "jpg",
+        "image/jutvision" : "jut",
+        "image/ktx" : "ktx",
+        "image/pict" : "pict",
+        "image/pjpeg" : "jpg",
+        "image/png" : "png",
+        "image/prs.btif" : "btif",
+        "image/sgi" : "sgi",
+        "image/svg+xml" : "svg",
+        "image/tiff" : "tiff",
+        "image/vasa" : "mcf",
+        "image/vnd.adobe.photoshop" : "psd",
+        "image/vnd.dece.graphic" : "uvi",
+        "image/vnd.djvu" : "djvu",
+        "image/vnd.dvb.subtitle" : "sub",
+        "image/vnd.dwg" : "dwg",
+        "image/vnd.dxf" : "dxf",
+        "image/vnd.fastbidsheet" : "fbs",
+        "image/vnd.fpx" : "fpx",
+        "image/vnd.fst" : "fst",
+        "image/vnd.fujixerox.edmics-mmr" : "mmr",
+        "image/vnd.fujixerox.edmics-rlc" : "rlc",
+        "image/vnd.ms-modi" : "mdi",
+        "image/vnd.ms-photo" : "wdp",
+        "image/vnd.net-fpx" : "fpx",
+        "image/vnd.rn-realflash" : "rf",
+        "image/vnd.rn-realpix" : "rp",
+        "image/vnd.wap.wbmp" : "wbmp",
+        "image/vnd.xiff" : "xif",
+        "image/webp" : "webp",
+        "image/x-3ds" : "3ds",
+        "image/x-citrix-jpeg" : "jpg",
+        "image/x-citrix-png" : "png",
+        "image/x-cmu-raster" : "ras",
+        "image/x-cmx" : "cmx",
+        "image/x-dwg" : "dwg",
+        "image/x-freehand" : "fh",
+        "image/x-icon" : "ico",
+        "image/x-jg" : "art",
+        "image/x-jps" : "jps",
+        "image/x-mrsid-image" : "sid",
+        "image/x-niff" : "niff",
+        "image/x-pcx" : "pcx",
+        "image/x-pict" : "pic",
+        "image/x-png" : "png",
+        "image/x-portable-anymap" : "pnm",
+        "image/x-portable-bitmap" : "pbm",
+        "image/x-portable-graymap" : "pgm",
+        "image/x-portable-greymap" : "pgm",
+        "image/x-portable-pixmap" : "ppm",
+        "image/x-rgb" : "rgb",
+        "image/x-tga" : "tga",
+        "image/x-tiff" : "tiff",
+        "image/x-windows-bmp" : "bmp",
+        "image/x-xbitmap" : "xbm",
+        "image/x-xbm" : "xbm",
+        "image/x-xpixmap" : "xpm",
+        "image/x-xwd" : "xwd",
+        "image/x-xwindowdump" : "xwd",
+        "image/xbm" : "xbm",
+        "image/xpm" : "xpm",
+        "message/rfc822" : "eml",
+        "model/iges" : "iges",
+        "model/mesh" : "msh",
+        "model/vnd.collada+xml" : "dae",
+        "model/vnd.dwf" : "dwf",
+        "model/vnd.gdl" : "gdl",
+        "model/vnd.gtw" : "gtw",
+        "model/vnd.mts" : "mts",
+        "model/vnd.vtu" : "vtu",
+        "model/vrml" : "vrml",
+        "model/x-pov" : "pov",
+        "model/x3d+binary" : "x3db",
+        "model/x3d+vrml" : "x3dv",
+        "model/x3d+xml" : "x3d",
+        "multipart/x-gzip" : "gzip",
+        "multipart/x-ustar" : "ustar",
+        "multipart/x-zip" : "zip",
+        "music/x-karaoke" : "kar",
+        "paleovu/x-pv" : "pvu",
+        "text/asp" : "asp",
+        "text/cache-manifest" : "appcache",
+        "text/calendar" : "ics",
+        "text/css" : "css",
+        "text/csv" : "csv",
+        "text/ecmascript" : "js",
+        "text/h323" : "323",
+        "text/html" : "html",
+        "text/iuls" : "uls",
+        "text/java" : "java",
+        "text/javascript" : "js",
+        "text/mcf" : "mcf",
+        "text/n3" : "n3",
+        "text/pascal" : "pas",
+        "text/plain" : "txt",
+        "text/plain-bas" : "par",
+        "text/prs.lines.logTag" : "dsc",
+        "text/richtext" : "rtf",
+        "text/scriplet" : "wsc",
+        "text/scriptlet" : "sct",
+        "text/sgml" : "sgml",
+        "text/tab-separated-values" : "tsv",
+        "text/troff" : "t",
+        "text/turtle" : "ttl",
+        "text/uri-list" : "uri",
+        "text/vcard" : "vcard",
+        "text/vnd.abc" : "abc",
+        "text/vnd.curl" : "curl",
+        "text/vnd.curl.dcurl" : "dcurl",
+        "text/vnd.curl.mcurl" : "mcurl",
+        "text/vnd.curl.scurl" : "scurl",
+        "text/vnd.dvb.subtitle" : "sub",
+        "text/vnd.fly" : "fly",
+        "text/vnd.fmi.flexstor" : "flx",
+        "text/vnd.graphviz" : "gv",
+        "text/vnd.in3d.3dml" : "3dml",
+        "text/vnd.in3d.spot" : "spot",
+        "text/vnd.rn-realtext" : "rt",
+        "text/vnd.sun.j2me.app-descriptor" : "jad",
+        "text/vnd.wap.wml" : "wml",
+        "text/vnd.wap.wmlscript" : "wmls",
+        "text/webviewhtml" : "htt",
+        "text/x-asm" : "asm",
+        "text/x-audiosoft-intra" : "aip",
+        "text/x-c" : "c",
+        "text/x-component" : "htc",
+        "text/x-fortran" : "f",
+        "text/x-h" : "h",
+        "text/x-java-source" : "java",
+        "text/x-la-asf" : "lsx",
+        "text/x-m" : "m",
+        "text/x-nfo" : "nfo",
+        "text/x-opml" : "opml",
+        "text/x-pascal" : "p",
+        "text/x-script" : "hlb",
+        "text/x-script.csh" : "csh",
+        "text/x-script.elisp" : "el",
+        "text/x-script.guile" : "scm",
+        "text/x-script.ksh" : "ksh",
+        "text/x-script.lisp" : "lsp",
+        "text/x-script.perl" : "pl",
+        "text/x-script.perl-module" : "pm",
+        "text/x-script.phyton" : "py",
+        "text/x-script.rexx" : "rexx",
+        "text/x-script.scheme" : "scm",
+        "text/x-script.sh" : "sh",
+        "text/x-script.tcl" : "tcl",
+        "text/x-script.tcsh" : "tcsh",
+        "text/x-script.zsh" : "zsh",
+        "text/x-setext" : "etx",
+        "text/x-sfv" : "sfv",
+        "text/x-sgml" : "sgml",
+        "text/x-uil" : "uil",
+        "text/x-uuencode" : "uu",
+        "text/x-vcalendar" : "vcs",
+        "text/x-vcard" : "vcf",
+        "text/xml" : "xml",
+        "text/yaml" : "yaml",
+        "video/3gpp" : "3gp",
+        "video/3gpp2" : "3g2",
+        "video/animaflex" : "afl",
+        "video/avi" : "avi",
+        "video/avs-video" : "avs",
+        "video/dl" : "dl",
+        "video/fli" : "fli",
+        "video/gl" : "gl",
+        "video/h261" : "h261",
+        "video/h263" : "h263",
+        "video/h264" : "h264",
+        "video/jpeg" : "jpgv",
+        "video/jpm" : "jpm",
+        "video/mj2" : "mj2",
+        "video/mp4" : "mp4",
+        "video/mpeg" : "mpg",
+        "video/msvideo" : "avi",
+        "video/ogg" : "ogv",
+        "video/quicktime" : "mov",
+        "video/vdo" : "vdo",
+        "video/vnd.dece.hd" : "uvh",
+        "video/vnd.dece.mobile" : "uvm",
+        "video/vnd.dece.pd" : "uvp",
+        "video/vnd.dece.sd" : "uvs",
+        "video/vnd.dece.video" : "uvv",
+        "video/vnd.dvb.file" : "dvb",
+        "video/vnd.fvt" : "fvt",
+        "video/vnd.mpegurl" : "mxu",
+        "video/vnd.ms-playready.media.pyv" : "pyv",
+        "video/vnd.rn-realvideo" : "rv",
+        "video/vnd.uvvu.mp4" : "uvu",
+        "video/vnd.vivo" : "viv",
+        "video/vosaic" : "vos",
+        "video/webm" : "webm",
+        "video/x-amt-demorun" : "xdr",
+        "video/x-amt-showrun" : "xsr",
+        "video/x-atomic3d-feature" : "fmf",
+        "video/x-dl" : "dl",
+        "video/x-dv" : "dv",
+        "video/x-f4v" : "f4v",
+        "video/x-fli" : "fli",
+        "video/x-flv" : "flv",
+        "video/x-gl" : "gl",
+        "video/x-isvideo" : "isu",
+        "video/x-la-asf" : "lsf",
+        "video/x-m4v" : "m4v",
+        "video/x-matroska" : "mkv",
+        "video/x-mng" : "mng",
+        "video/x-motion-jpeg" : "mjpg",
+        "video/x-mpeg" : "mpg",
+        "video/x-mpeq2a" : "mp2",
+        "video/x-ms-asf" : "asf",
+        "video/x-ms-asf-plugin" : "asx",
+        "video/x-ms-vob" : "vob",
+        "video/x-ms-wm" : "wm",
+        "video/x-ms-wmv" : "wmv",
+        "video/x-ms-wmx" : "wmx",
+        "video/x-ms-wvx" : "wvx",
+        "video/x-msvideo" : "avi",
+        "video/x-qtc" : "qtc",
+        "video/x-scm" : "scm",
+        "video/x-sgi-movie" : "movie",
+        "video/x-smv" : "smv",
+        "windows/metafile" : "wmf",
+        "www/mime" : "mime",
+        "x-conference/x-cooltalk" : "ice",
+        "x-music/x-midi" : "midi",
+        "x-world/x-3dmf" : "3dmf",
+        "x-world/x-svr" : "svr",
+        "x-world/x-vrml" : "vrml",
+        "x-world/x-vrt" : "vrt",
+        "xgl/drawing" : "xgz",
+        "xgl/movie" : "xmz",
+    ]
+    
     private static let genericExtensionTypesToMimeTypes: [String: String] = [
         "123": "application/vnd.lotus-1-2-3",
         "3dml": "text/vnd.in3d.3dml",