jellyfin/MediaBrowser.Model/Net/MimeTypes.cs
2023-02-16 15:08:01 +01:00

188 lines
6.0 KiB
C#

#pragma warning disable CS1591
using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Linq;
using Jellyfin.Extensions;
namespace MediaBrowser.Model.Net
{
/// <summary>
/// Class MimeTypes.
/// </summary>
///
/// <remarks>
/// For more information on MIME types:
/// <list type="bullet">
/// <item>http://en.wikipedia.org/wiki/Internet_media_type</item>
/// <item>https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types/Common_types</item>
/// <item>http://www.iana.org/assignments/media-types/media-types.xhtml</item>
/// </list>
/// </remarks>
public static class MimeTypes
{
/// <summary>
/// Any extension in this list is considered a video file.
/// </summary>
private static readonly HashSet<string> _videoFileExtensions = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
{
".3gp",
".asf",
".avi",
".divx",
".dvr-ms",
".f4v",
".flv",
".img",
".iso",
".m2t",
".m2ts",
".m2v",
".m4v",
".mk3d",
".mkv",
".mov",
".mp4",
".mpg",
".mpeg",
".mts",
".ogg",
".ogm",
".ogv",
".rec",
".ts",
".rmvb",
".webm",
".wmv",
".wtv",
};
/// <summary>
/// Used for extensions not in <see cref="Model.MimeTypes"/> or to override them.
/// </summary>
private static readonly Dictionary<string, string> _mimeTypeLookup = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
{
// Type application
{ ".azw3", "application/vnd.amazon.ebook" },
// Type image
{ ".tbn", "image/jpeg" },
// Type text
{ ".ass", "text/x-ssa" },
{ ".ssa", "text/x-ssa" },
{ ".edl", "text/plain" },
{ ".html", "text/html; charset=UTF-8" },
{ ".htm", "text/html; charset=UTF-8" },
// Type video
{ ".mpegts", "video/mp2t" },
// Type audio
{ ".aac", "audio/aac" },
{ ".ac3", "audio/ac3" },
{ ".ape", "audio/x-ape" },
{ ".dsf", "audio/dsf" },
{ ".dsp", "audio/dsp" },
{ ".flac", "audio/flac" },
{ ".m4b", "audio/m4b" },
{ ".mp3", "audio/mpeg" },
{ ".vorbis", "audio/vorbis" },
{ ".webma", "audio/webm" },
{ ".wv", "audio/x-wavpack" },
{ ".xsp", "audio/xsp" },
};
private static readonly Dictionary<string, string> _extensionLookup = new Dictionary<string, string>(StringComparer.OrdinalIgnoreCase)
{
// Type application
{ "application/x-cbz", ".cbz" },
{ "application/x-javascript", ".js" },
{ "application/xml", ".xml" },
{ "application/x-mpegURL", ".m3u8" },
// Type audio
{ "audio/aac", ".aac" },
{ "audio/ac3", ".ac3" },
{ "audio/dsf", ".dsf" },
{ "audio/dsp", ".dsp" },
{ "audio/flac", ".flac" },
{ "audio/m4b", ".m4b" },
{ "audio/vorbis", ".vorbis" },
{ "audio/x-ape", ".ape" },
{ "audio/xsp", ".xsp" },
{ "audio/x-wavpack", ".wv" },
// Type image
{ "image/jpeg", ".jpg" },
{ "image/tiff", ".tiff" },
{ "image/x-png", ".png" },
{ "image/x-icon", ".ico" },
// Type text
{ "text/plain", ".txt" },
{ "text/rtf", ".rtf" },
{ "text/x-ssa", ".ssa" },
// Type video
{ "video/vnd.mpeg.dash.mpd", ".mpd" },
{ "video/x-matroska", ".mkv" },
};
public static string GetMimeType(string path) => GetMimeType(path, "application/octet-stream");
/// <summary>
/// Gets the type of the MIME.
/// </summary>
/// <param name="filename">The filename to find the MIME type of.</param>
/// <param name="defaultValue">The default value to return if no fitting MIME type is found.</param>
/// <returns>The correct MIME type for the given filename, or <paramref name="defaultValue"/> if it wasn't found.</returns>
[return: NotNullIfNotNull("defaultValue")]
public static string? GetMimeType(string filename, string? defaultValue = null)
{
ArgumentException.ThrowIfNullOrEmpty(filename);
var ext = Path.GetExtension(filename);
if (_mimeTypeLookup.TryGetValue(ext, out string? result))
{
return result;
}
if (Model.MimeTypes.TryGetMimeType(filename, out var mimeType))
{
return mimeType;
}
// Catch-all for all video types that don't require specific mime types
if (_videoFileExtensions.Contains(ext))
{
return string.Concat("video/", ext.AsSpan(1));
}
return defaultValue;
}
public static string? ToExtension(string mimeType)
{
ArgumentException.ThrowIfNullOrEmpty(mimeType);
// handle text/html; charset=UTF-8
mimeType = mimeType.AsSpan().LeftPart(';').ToString();
if (_extensionLookup.TryGetValue(mimeType, out string? result))
{
return result;
}
var extension = Model.MimeTypes.GetMimeTypeExtensions(mimeType).FirstOrDefault();
return string.IsNullOrEmpty(extension) ? null : "." + extension;
}
public static bool IsImage(ReadOnlySpan<char> mimeType)
=> mimeType.StartsWith("image/", StringComparison.OrdinalIgnoreCase);
}
}