5 day-to-day C# extension methods to make your life easier

I’ve noticed recently I take for granted some extensions methods I’ve been using for a while now that I use on a fairly frequent basis. From getting a file as base64 quickly to to just doing simple JSON operations, here are 5 day to day extension methods that hopefully prove helpful to your projects.

Feel free to look at the examples below or if you simply want to use the methods, they’re all contained in the following NuGet package (along with A LOT more but I haven’t had time to properly document the whole toolkit yet so that’s for another day, and yes it will be open sourced when it’s properly documented too!):

DarkIce.Toolkit.Core

https://www.nuget.org/packages/DarkIce.Toolkit.Core/

1. Get a file as Base64 data from a file path string

Usage:

var fileBase64Data = "/your/file/path/here/file.abc".GetFileAsBase64Data();

Code:

public static async Task GetFileAsBase64Data(this string filePath)
{
    var base64Data = "";
    using (var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
    {
        var imageData = new byte[fs.Length];
        await fs.ReadAsync(imageData, 0, (int)fs.Length);
        base64Data = Convert.ToBase64String(imageData);
    }

    return base64Data;
}

2. Quickly convert back and forth from JSON

Usage:

var myObject = aJsonStringHere.FromJson();

Code:

public async static Task FromJson(this string json)
{
    T result = default(T);
    await Task.Run(() => result = JsonConvert.DeserializeObject(json));
    return result;
}

Usage:

var json = myObject.ToJson();

Code:

public async static Task ToJson(this object obj)
{
    var json = await Task.Run(() => JsonConvert.SerializeObject(obj));
    return json;
}

3. Get file size (or any value) categorised into a particular range. I’ve found this invaluable when it comes to analytics that involve file uploads where you want the overall ranges but not exact values

Usage:

...
    var totalFileSizeRangeText = totalFileSize.GetRoundedFileSizeRange();
...
    properties.Add("TotalAttachmentsSize", totalFileSizeRangeText);
...
    Analytics.TrackEvent("AnEvent", properties);

public static class FileExtensions
{
    private const long ONE_KILOBYTE = 1024;
    private const long ONE_MEGABYTE = ONE_KILOBYTE * 1024;
    private const long MAX_FILE_SIZE = ONE_MEGABYTE * 20;
    private const long DEFAULT_KILOBYTE_RANGE = ONE_KILOBYTE * 512;

    // Places a file size into a range such as 5.0MB - 5.5MB for better analytics aggregation

    //Filesize to categorise as a range /
    //The blocks for each range, e.g. 0.5MB, 5MB etc in kilobytes ///
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Net.Http;
    using System.Threading.Tasks;
    using Newtonsoft.Json;

    public static class FileSizeExtensions
    {
        private const long MAX_FILE_SIZE = 1073741824; // 1 GB in bytes
        private const long DEFAULT_KILOBYTE_RANGE = 1024; // 1 KB in bytes

        /// <summary>
        /// Returns a human-readable file size range string based on the provided file size.
        /// </summary>
        /// <param name="fileSize">The file size in bytes.</param>
        /// <param name="kilobyteRange">The range size in kilobytes. Defaults to 1 KB.</param>
        /// <returns>A string representing the file size range.</returns>
        public static string GetRoundedFileSizeRange(this long fileSize, long kilobyteRange = DEFAULT_KILOBYTE_RANGE)
        {
            var ranges = new List<Tuple<long, long, string>>
            {
                // Add minimum range
                new Tuple<long, long, string>(0, kilobyteRange, $"< {kilobyteRange.ToFileSize()}")
            };

            // Generate intermediate ranges
            for (long i = kilobyteRange; i < MAX_FILE_SIZE; i += kilobyteRange)
            {
                long upperRange = i + kilobyteRange;
                var name = $"{i.ToFileSize()} - {upperRange.ToFileSize()}";
                ranges.Add(new Tuple<long, long, string>(i, upperRange, name));
            }

            // Add maximum tracked range
            ranges.Add(new Tuple<long, long, string>(MAX_FILE_SIZE, long.MaxValue, $"> {MAX_FILE_SIZE.ToFileSize()}"));

            // Find the range that includes the file size
            var fileRange = ranges.FirstOrDefault(x => fileSize.IsWithin(x.Item1, x.Item2));

            return fileRange?.Item3 ?? "Unknown Range";
        }

        /// <summary>
        /// Determines if a value is within a specified range.
        /// </summary>
        /// <param name="value">The value to check.</param>
        /// <param name="minimum">The inclusive lower bound.</param>
        /// <param name="maximum">The exclusive upper bound.</param>
        /// <returns>True if the value is within the range; otherwise, false.</returns>
        public static bool IsWithin(this long value, long minimum, long maximum)
        {
            return value >= minimum && value < maximum;
        }

        /// <summary>
        /// Converts a byte value to a human-readable file size string.
        /// </summary>
        /// <param name="bytes">The size in bytes.</param>
        /// <returns>A string representing the file size in appropriate units.</returns>
        public static string ToFileSize(this long bytes)
        {
            const long scale = 1024;
            string[] orders = new string[] { "B", "KB", "MB", "GB", "TB" };
            double max = (double)bytes;
            int order = 0;
            while (max >= scale && order < orders.Length - 1)
            {
                order++;
                max = max / scale;
            }
            return $"{max:0.##} {orders[order]}";
        }
    }

    public static class HttpResponseMessageExtensions
    {
        /// <summary>
        /// Asynchronously deserializes the HTTP response content to a specified type.
        /// </summary>
        /// <typeparam name="T">The type to deserialize to.</typeparam>
        /// <param name="response">The HTTP response message.</param>
        /// <returns>An instance of the specified type.</returns>
        public static async Task<T>GetResult<T>(this HttpResponseMessage response)
        {
            var content = await response.Content.ReadAsStringAsync();
            var result = JsonConvert.DeserializeObject<T>(content);
            return result;
        }
    }
}

5. Get the MIME type of a file from a string of the file path

Usage:

var fileMimeType = "/your/file/path/here/file.abc".GetFileMimeType();

Code:

public static Task GetFileMimeType(this string filePath)
{
    var fileInfo = new FileInfo(filePath);
    var extension = fileInfo.Extension.Replace(".", "");

    // Default to default binary type
    var mimeType = "application/octet-stream";

    // Look for mime type in known dictionary
    if(MimeTypes.TryGetValue(extension, out string knownMimeType))
    {
    mimeType = knownMimeType;
    }

    return Task.FromResult(mimeType);
}

#region MimeTypes Dictionary

///
/// Provides a comprehensive content (Mime) type listing keyed by file extension
/// Sourced from Apache, for more see http://stackoverflow.com/questions/1612767/file-extensions-and-mime-types-in-net
///
public static Dictionary<string, string> MimeTypes = new Dictionary<string, string>
{
    { "123", "application/vnd.lotus-1-2-3" },
    { "3dml", "text/vnd.in3d.3dml" },
    { "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" },
    { "application", "application/x-ms-application" },
    { "apr", "application/vnd.lotus-approach" },
    { "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" },
    { "bmi", "application/vnd.bmi" },
    { "bmp", "image/bmp" },
    { "book", "application/vnd.framemaker" },
    { "box", "application/vnd.previewsystems.box" },
    { "boz", "application/x-bzip2" },
    { "bpk", "application/octet-stream" },
    { "btif", "image/prs.btif" },
    { "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" },
    { "car", "application/vnd.curl.car" },
    { "cat", "application/vnd.ms-pki.seccat" },
    { "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" },
    { "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" },
    { "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" },
    { "dataless", "application/vnd.fdsn.seed" },
    { "davmount", "application/davmount+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" },
    { "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/octet-stream" },
    { "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" },
    { "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" },
    { "eml", "message/rfc822" },
    { "emma", "application/emma+xml" },
    { "eol", "audio/vnd.digital-winds" },
    { "eot", "application/vnd.ms-fontobject" },
    { "eps", "application/postscript" },
    { "epub", "application/epub+zip" },
    { "es3", "application/vnd.eszigno3+xml" },
    { "esf", "application/vnd.epson.esf" },
    { "et3", "application/vnd.eszigno3+xml" },
    { "etx", "text/x-setext" },
    { "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" },
    { "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" },
    { "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" },
    { "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" },
    { "gmx", "application/vnd.gmx" },
    { "gnumeric", "application/x-gnumeric" },
    { "gph", "application/vnd.flographit" },
    { "gqf", "application/vnd.grafeq" },
    { "gqs", "application/vnd.grafeq" },
    { "gram", "application/srgs" },
    { "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" },
    { "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" },
    { "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" },
    { "ipfix", "application/ipfix" },
    { "ipk", "application/vnd.shana.informed.package" },
    { "irm", "application/vnd.ibm.rights-management" },
    { "irp", "application/vnd.irepository.package+xml" },
    { "iso", "application/octet-stream" },
    { "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" },
    { "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" },
    { "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/octet-stream" },
    { "link66", "application/vnd.route66.link66+xml" },
    { "list", "text/plain" },
    { "list3820", "application/vnd.ibm.modcap" },
    { "listafp", "application/vnd.ibm.modcap" },
    { "log", "text/plain" },
    { "lostxml", "application/lost+xml" },
    { "lrf", "application/octet-stream" },
    { "lrm", "application/vnd.ms-lrm" },
    { "ltf", "application/vnd.frogans.ltf" },
    { "lvp", "audio/vnd.lucent.voice" },
    { "lwp", "application/vnd.lotus-wordpro" },
    { "lzh", "application/octet-stream" },
    { "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/vnd.apple.mpegurl" },
    { "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" },
    { "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" },
    { "mdb", "application/x-msaccess" },
    { "mdi", "image/vnd.ms-modi" },
    { "me", "text/troff" },
    { "mesh", "model/mesh" },
    { "meta4", "application/metalink4+xml" },
    { "mets", "application/mets+xml" },
    { "mfm", "application/vnd.mfmp" },
    { "mgp", "application/vnd.osgeo.mapguide.package" },
    { "mgz", "application/vnd.proteus.magazine" },
    { "mid", "audio/midi" },
    { "midi", "audio/midi" },
    { "mif", "application/vnd.mif" },
    { "mime", "message/rfc822" },
    { "mj2", "video/mj2" },
    { "mjp2", "video/mj2" },
    { "mlp", "application/vnd.dolby.mlp" },
    { "mmd", "application/vnd.chipnuts.karaoke-mmd" },
    { "mmf", "application/vnd.smaf" },
    { "mmr", "image/vnd.fujixerox.edmics-mmr" },
    { "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" },
    { "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" },
    { "n3", "text/n3" },
    { "nb", "application/mathematica" },
    { "nbp", "application/vnd.wolfram.player" },
    { "nc", "application/x-netcdf" },
    { "ncx", "application/x-dtbncx+xml" },
    { "n-gage", "application/vnd.nokia.n-gage.symbian.install" },
    { "ngdat", "application/vnd.nokia.n-gage.data" },
    { "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" },
    { "nsf", "application/vnd.lotus-notes" },
    { "oa2", "application/vnd.fujitsu.oasys2" },
    { "oa3", "application/vnd.fujitsu.oasys3" },
    { "oas", "application/vnd.fujitsu.oasys" },
    { "obd", "application/x-msbinder" },
    { "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" },
    { "onepkg", "application/onenote" },
    { "onetmp", "application/onenote" },
    { "onetoc", "application/onenote" },
    { "onetoc2", "application/onenote" },
    { "opf", "application/oebps-package+xml" },
    { "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", "application/x-font-otf" },
    { "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" },
    { "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" },
    { "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" },
    { "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" },
    { "rnc", "application/relax-ng-compact-syntax" },
    { "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", "application/rtf" },
    { "rtx", "text/richtext" },
    { "s", "text/x-asm" },
    { "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" },
    { "sgl", "application/vnd.stardivision.writer-global" },
    { "sgm", "text/sgml" },
    { "sgml", "text/sgml" },
    { "sh", "application/x-sh" },
    { "shar", "application/x-shar" },
    { "shf", "application/shf+xml" },
    { "sig", "application/pgp-signature" },
    { "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" },
    { "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" },
    { "src", "application/x-wais-source" },
    { "sru", "application/sru+xml" },
    { "srx", "application/sparql-results+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", "image/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" },
    { "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" },
    { "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" },
    { "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" },
    { "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" },
    { "uvx", "application/vnd.dece.unspecified" },
    { "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" },
    { "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" },
    { "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" },
    { "weba", "audio/webm" },
    { "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-ms-wmz" },
    { "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", "application/vnd.hzn-3d-crossword" },
    { "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" },
    { "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" },
    { "xml", "application/xml" },
    { "xo", "application/vnd.olpc-sugar" },
    { "xop", "application/xop+xml" },
    { "xpi", "application/x-xpinstall" },
    { "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" },
    { "yang", "application/yang" },
    { "yin", "application/yin+xml" },
    { "zaz", "application/vnd.zzazz.deck+xml" },
    { "zip", "application/zip" },
    { "zir", "application/vnd.zul" },
    { "zirz", "application/vnd.zul" },
    { "zmm", "application/vnd.handheld-entertainment+xml" },
};
#endregion

And that’s it, just a few handy helpers for day to day use that I’ve personally found a lot of benefit from with the projects I work with.