Merge branch 'jellyfin:master' into master

1 files changed, 549 insertions, 0 deletions

diff --git a/Jellyfin.Api/Controllers/SubtitleController.cs b/Jellyfin.Api/Controllers/SubtitleController.cs
new file mode 100644
index 000000000..db8307f28
--- /dev/null
+++ b/Jellyfin.Api/Controllers/SubtitleController.cs
@@ -0,0 +1,549 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Net.Mime;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Jellyfin.Api.Attributes;
+using Jellyfin.Api.Constants;
+using Jellyfin.Api.Models.SubtitleDtos;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Controller.Configuration;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.MediaEncoding;
+using MediaBrowser.Controller.Net;
+using MediaBrowser.Controller.Providers;
+using MediaBrowser.Controller.Subtitles;
+using MediaBrowser.Model.Entities;
+using MediaBrowser.Model.IO;
+using MediaBrowser.Model.Net;
+using MediaBrowser.Model.Providers;
+using MediaBrowser.Model.Subtitles;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Logging;
+
+namespace Jellyfin.Api.Controllers
+{
+    /// <summary>
+    /// Subtitle controller.
+    /// </summary>
+    [Route("")]
+    public class SubtitleController : BaseJellyfinApiController
+    {
+        private readonly IServerConfigurationManager _serverConfigurationManager;
+        private readonly ILibraryManager _libraryManager;
+        private readonly ISubtitleManager _subtitleManager;
+        private readonly ISubtitleEncoder _subtitleEncoder;
+        private readonly IMediaSourceManager _mediaSourceManager;
+        private readonly IProviderManager _providerManager;
+        private readonly IFileSystem _fileSystem;
+        private readonly IAuthorizationContext _authContext;
+        private readonly ILogger<SubtitleController> _logger;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SubtitleController"/> class.
+        /// </summary>
+        /// <param name="serverConfigurationManager">Instance of <see cref="IServerConfigurationManager"/> interface.</param>
+        /// <param name="libraryManager">Instance of <see cref="ILibraryManager"/> interface.</param>
+        /// <param name="subtitleManager">Instance of <see cref="ISubtitleManager"/> interface.</param>
+        /// <param name="subtitleEncoder">Instance of <see cref="ISubtitleEncoder"/> interface.</param>
+        /// <param name="mediaSourceManager">Instance of <see cref="IMediaSourceManager"/> interface.</param>
+        /// <param name="providerManager">Instance of <see cref="IProviderManager"/> interface.</param>
+        /// <param name="fileSystem">Instance of <see cref="IFileSystem"/> interface.</param>
+        /// <param name="authContext">Instance of <see cref="IAuthorizationContext"/> interface.</param>
+        /// <param name="logger">Instance of <see cref="ILogger{SubtitleController}"/> interface.</param>
+        public SubtitleController(
+            IServerConfigurationManager serverConfigurationManager,
+            ILibraryManager libraryManager,
+            ISubtitleManager subtitleManager,
+            ISubtitleEncoder subtitleEncoder,
+            IMediaSourceManager mediaSourceManager,
+            IProviderManager providerManager,
+            IFileSystem fileSystem,
+            IAuthorizationContext authContext,
+            ILogger<SubtitleController> logger)
+        {
+            _serverConfigurationManager = serverConfigurationManager;
+            _libraryManager = libraryManager;
+            _subtitleManager = subtitleManager;
+            _subtitleEncoder = subtitleEncoder;
+            _mediaSourceManager = mediaSourceManager;
+            _providerManager = providerManager;
+            _fileSystem = fileSystem;
+            _authContext = authContext;
+            _logger = logger;
+        }
+
+        /// <summary>
+        /// Deletes an external subtitle file.
+        /// </summary>
+        /// <param name="itemId">The item id.</param>
+        /// <param name="index">The index of the subtitle file.</param>
+        /// <response code="204">Subtitle deleted.</response>
+        /// <response code="404">Item not found.</response>
+        /// <returns>A <see cref="NoContentResult"/>.</returns>
+        [HttpDelete("Videos/{itemId}/Subtitles/{index}")]
+        [Authorize(Policy = Policies.RequiresElevation)]
+        [ProducesResponseType(StatusCodes.Status204NoContent)]
+        [ProducesResponseType(StatusCodes.Status404NotFound)]
+        public ActionResult<Task> DeleteSubtitle(
+            [FromRoute, Required] Guid itemId,
+            [FromRoute, Required] int index)
+        {
+            var item = _libraryManager.GetItemById(itemId);
+
+            if (item == null)
+            {
+                return NotFound();
+            }
+
+            _subtitleManager.DeleteSubtitles(item, index);
+            return NoContent();
+        }
+
+        /// <summary>
+        /// Search remote subtitles.
+        /// </summary>
+        /// <param name="itemId">The item id.</param>
+        /// <param name="language">The language of the subtitles.</param>
+        /// <param name="isPerfectMatch">Optional. Only show subtitles which are a perfect match.</param>
+        /// <response code="200">Subtitles retrieved.</response>
+        /// <returns>An array of <see cref="RemoteSubtitleInfo"/>.</returns>
+        [HttpGet("Items/{itemId}/RemoteSearch/Subtitles/{language}")]
+        [Authorize(Policy = Policies.DefaultAuthorization)]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        public async Task<ActionResult<IEnumerable<RemoteSubtitleInfo>>> SearchRemoteSubtitles(
+            [FromRoute, Required] Guid itemId,
+            [FromRoute, Required] string language,
+            [FromQuery] bool? isPerfectMatch)
+        {
+            var video = (Video)_libraryManager.GetItemById(itemId);
+
+            return await _subtitleManager.SearchSubtitles(video, language, isPerfectMatch, false, CancellationToken.None).ConfigureAwait(false);
+        }
+
+        /// <summary>
+        /// Downloads a remote subtitle.
+        /// </summary>
+        /// <param name="itemId">The item id.</param>
+        /// <param name="subtitleId">The subtitle id.</param>
+        /// <response code="204">Subtitle downloaded.</response>
+        /// <returns>A <see cref="NoContentResult"/>.</returns>
+        [HttpPost("Items/{itemId}/RemoteSearch/Subtitles/{subtitleId}")]
+        [Authorize(Policy = Policies.DefaultAuthorization)]
+        [ProducesResponseType(StatusCodes.Status204NoContent)]
+        public async Task<ActionResult> DownloadRemoteSubtitles(
+            [FromRoute, Required] Guid itemId,
+            [FromRoute, Required] string subtitleId)
+        {
+            var video = (Video)_libraryManager.GetItemById(itemId);
+
+            try
+            {
+                await _subtitleManager.DownloadSubtitles(video, subtitleId, CancellationToken.None)
+                    .ConfigureAwait(false);
+
+                _providerManager.QueueRefresh(video.Id, new MetadataRefreshOptions(new DirectoryService(_fileSystem)), RefreshPriority.High);
+            }
+            catch (Exception ex)
+            {
+                _logger.LogError(ex, "Error downloading subtitles");
+            }
+
+            return NoContent();
+        }
+
+        /// <summary>
+        /// Gets the remote subtitles.
+        /// </summary>
+        /// <param name="id">The item id.</param>
+        /// <response code="200">File returned.</response>
+        /// <returns>A <see cref="FileStreamResult"/> with the subtitle file.</returns>
+        [HttpGet("Providers/Subtitles/Subtitles/{id}")]
+        [Authorize(Policy = Policies.DefaultAuthorization)]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        [Produces(MediaTypeNames.Application.Octet)]
+        [ProducesFile("text/*")]
+        public async Task<ActionResult> GetRemoteSubtitles([FromRoute, Required] string id)
+        {
+            var result = await _subtitleManager.GetRemoteSubtitles(id, CancellationToken.None).ConfigureAwait(false);
+
+            return File(result.Stream, MimeTypes.GetMimeType("file." + result.Format));
+        }
+
+        /// <summary>
+        /// Gets subtitles in a specified format.
+        /// </summary>
+        /// <param name="routeItemId">The (route) item id.</param>
+        /// <param name="routeMediaSourceId">The (route) media source id.</param>
+        /// <param name="routeIndex">The (route) subtitle stream index.</param>
+        /// <param name="routeFormat">The (route) format of the returned subtitle.</param>
+        /// <param name="itemId">The item id.</param>
+        /// <param name="mediaSourceId">The media source id.</param>
+        /// <param name="index">The subtitle stream index.</param>
+        /// <param name="format">The format of the returned subtitle.</param>
+        /// <param name="endPositionTicks">Optional. The end position of the subtitle in ticks.</param>
+        /// <param name="copyTimestamps">Optional. Whether to copy the timestamps.</param>
+        /// <param name="addVttTimeMap">Optional. Whether to add a VTT time map.</param>
+        /// <param name="startPositionTicks">The start position of the subtitle in ticks.</param>
+        /// <response code="200">File returned.</response>
+        /// <returns>A <see cref="FileContentResult"/> with the subtitle file.</returns>
+        [HttpGet("Videos/{routeItemId}/{routeMediaSourceId}/Subtitles/{routeIndex}/Stream.{routeFormat}")]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        [ProducesFile("text/*")]
+        public async Task<ActionResult> GetSubtitle(
+            [FromRoute, Required] Guid routeItemId,
+            [FromRoute, Required] string routeMediaSourceId,
+            [FromRoute, Required] int routeIndex,
+            [FromRoute, Required] string routeFormat,
+            [FromQuery, ParameterObsolete] Guid? itemId,
+            [FromQuery, ParameterObsolete] string? mediaSourceId,
+            [FromQuery, ParameterObsolete] int? index,
+            [FromQuery, ParameterObsolete] string? format,
+            [FromQuery] long? endPositionTicks,
+            [FromQuery] bool copyTimestamps = false,
+            [FromQuery] bool addVttTimeMap = false,
+            [FromQuery] long startPositionTicks = 0)
+        {
+            // Set parameters to route value if not provided via query.
+            itemId ??= routeItemId;
+            mediaSourceId ??= routeMediaSourceId;
+            index ??= routeIndex;
+            format ??= routeFormat;
+
+            if (string.Equals(format, "js", StringComparison.OrdinalIgnoreCase))
+            {
+                format = "json";
+            }
+
+            if (string.IsNullOrEmpty(format))
+            {
+                var item = (Video)_libraryManager.GetItemById(itemId.Value);
+
+                var idString = itemId.Value.ToString("N", CultureInfo.InvariantCulture);
+                var mediaSource = _mediaSourceManager.GetStaticMediaSources(item, false)
+                    .First(i => string.Equals(i.Id, mediaSourceId ?? idString, StringComparison.Ordinal));
+
+                var subtitleStream = mediaSource.MediaStreams
+                    .First(i => i.Type == MediaStreamType.Subtitle && i.Index == index);
+
+                return PhysicalFile(subtitleStream.Path, MimeTypes.GetMimeType(subtitleStream.Path));
+            }
+
+            if (string.Equals(format, "vtt", StringComparison.OrdinalIgnoreCase) && addVttTimeMap)
+            {
+                await using Stream stream = await EncodeSubtitles(itemId.Value, mediaSourceId, index.Value, format, startPositionTicks, endPositionTicks, copyTimestamps).ConfigureAwait(false);
+                using var reader = new StreamReader(stream);
+
+                var text = await reader.ReadToEndAsync().ConfigureAwait(false);
+
+                text = text.Replace("WEBVTT", "WEBVTT\nX-TIMESTAMP-MAP=MPEGTS:900000,LOCAL:00:00:00.000", StringComparison.Ordinal);
+
+                return File(Encoding.UTF8.GetBytes(text), MimeTypes.GetMimeType("file." + format));
+            }
+
+            return File(
+                await EncodeSubtitles(
+                    itemId.Value,
+                    mediaSourceId,
+                    index.Value,
+                    format,
+                    startPositionTicks,
+                    endPositionTicks,
+                    copyTimestamps).ConfigureAwait(false),
+                MimeTypes.GetMimeType("file." + format));
+        }
+
+        /// <summary>
+        /// Gets subtitles in a specified format.
+        /// </summary>
+        /// <param name="routeItemId">The (route) item id.</param>
+        /// <param name="routeMediaSourceId">The (route) media source id.</param>
+        /// <param name="routeIndex">The (route) subtitle stream index.</param>
+        /// <param name="routeStartPositionTicks">The (route) start position of the subtitle in ticks.</param>
+        /// <param name="routeFormat">The (route) format of the returned subtitle.</param>
+        /// <param name="itemId">The item id.</param>
+        /// <param name="mediaSourceId">The media source id.</param>
+        /// <param name="index">The subtitle stream index.</param>
+        /// <param name="startPositionTicks">The start position of the subtitle in ticks.</param>
+        /// <param name="format">The format of the returned subtitle.</param>
+        /// <param name="endPositionTicks">Optional. The end position of the subtitle in ticks.</param>
+        /// <param name="copyTimestamps">Optional. Whether to copy the timestamps.</param>
+        /// <param name="addVttTimeMap">Optional. Whether to add a VTT time map.</param>
+        /// <response code="200">File returned.</response>
+        /// <returns>A <see cref="FileContentResult"/> with the subtitle file.</returns>
+        [HttpGet("Videos/{routeItemId}/{routeMediaSourceId}/Subtitles/{routeIndex}/{routeStartPositionTicks}/Stream.{routeFormat}")]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        [ProducesFile("text/*")]
+        public Task<ActionResult> GetSubtitleWithTicks(
+            [FromRoute, Required] Guid routeItemId,
+            [FromRoute, Required] string routeMediaSourceId,
+            [FromRoute, Required] int routeIndex,
+            [FromRoute, Required] long routeStartPositionTicks,
+            [FromRoute, Required] string routeFormat,
+            [FromQuery, ParameterObsolete] Guid? itemId,
+            [FromQuery, ParameterObsolete] string? mediaSourceId,
+            [FromQuery, ParameterObsolete] int? index,
+            [FromQuery, ParameterObsolete] long? startPositionTicks,
+            [FromQuery, ParameterObsolete] string? format,
+            [FromQuery] long? endPositionTicks,
+            [FromQuery] bool copyTimestamps = false,
+            [FromQuery] bool addVttTimeMap = false)
+        {
+            return GetSubtitle(
+                routeItemId,
+                routeMediaSourceId,
+                routeIndex,
+                routeFormat,
+                itemId,
+                mediaSourceId,
+                index,
+                format,
+                endPositionTicks,
+                copyTimestamps,
+                addVttTimeMap,
+                startPositionTicks ?? routeStartPositionTicks);
+        }
+
+        /// <summary>
+        /// Gets an HLS subtitle playlist.
+        /// </summary>
+        /// <param name="itemId">The item id.</param>
+        /// <param name="index">The subtitle stream index.</param>
+        /// <param name="mediaSourceId">The media source id.</param>
+        /// <param name="segmentLength">The subtitle segment length.</param>
+        /// <response code="200">Subtitle playlist retrieved.</response>
+        /// <returns>A <see cref="FileContentResult"/> with the HLS subtitle playlist.</returns>
+        [HttpGet("Videos/{itemId}/{mediaSourceId}/Subtitles/{index}/subtitles.m3u8")]
+        [Authorize(Policy = Policies.DefaultAuthorization)]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        [ProducesPlaylistFile]
+        [SuppressMessage("Microsoft.Performance", "CA1801:ReviewUnusedParameters", MessageId = "index", Justification = "Imported from ServiceStack")]
+        public async Task<ActionResult> GetSubtitlePlaylist(
+            [FromRoute, Required] Guid itemId,
+            [FromRoute, Required] int index,
+            [FromRoute, Required] string mediaSourceId,
+            [FromQuery, Required] int segmentLength)
+        {
+            var item = (Video)_libraryManager.GetItemById(itemId);
+
+            var mediaSource = await _mediaSourceManager.GetMediaSource(item, mediaSourceId, null, false, CancellationToken.None).ConfigureAwait(false);
+
+            var runtime = mediaSource.RunTimeTicks ?? -1;
+
+            if (runtime <= 0)
+            {
+                throw new ArgumentException("HLS Subtitles are not supported for this media.");
+            }
+
+            var segmentLengthTicks = TimeSpan.FromSeconds(segmentLength).Ticks;
+            if (segmentLengthTicks <= 0)
+            {
+                throw new ArgumentException("segmentLength was not given, or it was given incorrectly. (It should be bigger than 0)");
+            }
+
+            var builder = new StringBuilder();
+            builder.AppendLine("#EXTM3U")
+                .Append("#EXT-X-TARGETDURATION:")
+                .Append(segmentLength)
+                .AppendLine()
+                .AppendLine("#EXT-X-VERSION:3")
+                .AppendLine("#EXT-X-MEDIA-SEQUENCE:0")
+                .AppendLine("#EXT-X-PLAYLIST-TYPE:VOD");
+
+            long positionTicks = 0;
+
+            var accessToken = (await _authContext.GetAuthorizationInfo(Request).ConfigureAwait(false)).Token;
+
+            while (positionTicks < runtime)
+            {
+                var remaining = runtime - positionTicks;
+                var lengthTicks = Math.Min(remaining, segmentLengthTicks);
+
+                builder.Append("#EXTINF:")
+                    .Append(TimeSpan.FromTicks(lengthTicks).TotalSeconds)
+                    .Append(',')
+                    .AppendLine();
+
+                var endPositionTicks = Math.Min(runtime, positionTicks + segmentLengthTicks);
+
+                var url = string.Format(
+                    CultureInfo.InvariantCulture,
+                    "stream.vtt?CopyTimestamps=true&AddVttTimeMap=true&StartPositionTicks={0}&EndPositionTicks={1}&api_key={2}",
+                    positionTicks.ToString(CultureInfo.InvariantCulture),
+                    endPositionTicks.ToString(CultureInfo.InvariantCulture),
+                    accessToken);
+
+                builder.AppendLine(url);
+
+                positionTicks += segmentLengthTicks;
+            }
+
+            builder.AppendLine("#EXT-X-ENDLIST");
+            return File(Encoding.UTF8.GetBytes(builder.ToString()), MimeTypes.GetMimeType("playlist.m3u8"));
+        }
+
+        /// <summary>
+        /// Upload an external subtitle file.
+        /// </summary>
+        /// <param name="itemId">The item the subtitle belongs to.</param>
+        /// <param name="body">The request body.</param>
+        /// <response code="204">Subtitle uploaded.</response>
+        /// <returns>A <see cref="NoContentResult"/>.</returns>
+        [HttpPost("Videos/{itemId}/Subtitles")]
+        [Authorize(Policy = Policies.RequiresElevation)]
+        [ProducesResponseType(StatusCodes.Status204NoContent)]
+        public async Task<ActionResult> UploadSubtitle(
+            [FromRoute, Required] Guid itemId,
+            [FromBody, Required] UploadSubtitleDto body)
+        {
+            var video = (Video)_libraryManager.GetItemById(itemId);
+            var data = Convert.FromBase64String(body.Data);
+            await using var memoryStream = new MemoryStream(data);
+            await _subtitleManager.UploadSubtitle(
+                video,
+                new SubtitleResponse
+                {
+                    Format = body.Format,
+                    Language = body.Language,
+                    IsForced = body.IsForced,
+                    Stream = memoryStream
+                }).ConfigureAwait(false);
+            _providerManager.QueueRefresh(video.Id, new MetadataRefreshOptions(new DirectoryService(_fileSystem)), RefreshPriority.High);
+
+            return NoContent();
+        }
+
+        /// <summary>
+        /// Encodes a subtitle in the specified format.
+        /// </summary>
+        /// <param name="id">The media id.</param>
+        /// <param name="mediaSourceId">The source media id.</param>
+        /// <param name="index">The subtitle index.</param>
+        /// <param name="format">The format to convert to.</param>
+        /// <param name="startPositionTicks">The start position in ticks.</param>
+        /// <param name="endPositionTicks">The end position in ticks.</param>
+        /// <param name="copyTimestamps">Whether to copy the timestamps.</param>
+        /// <returns>A <see cref="Task{Stream}"/> with the new subtitle file.</returns>
+        private Task<Stream> EncodeSubtitles(
+            Guid id,
+            string? mediaSourceId,
+            int index,
+            string format,
+            long startPositionTicks,
+            long? endPositionTicks,
+            bool copyTimestamps)
+        {
+            var item = _libraryManager.GetItemById(id);
+
+            return _subtitleEncoder.GetSubtitles(
+                item,
+                mediaSourceId,
+                index,
+                format,
+                startPositionTicks,
+                endPositionTicks ?? 0,
+                copyTimestamps,
+                CancellationToken.None);
+        }
+
+        /// <summary>
+        /// Gets a list of available fallback font files.
+        /// </summary>
+        /// <response code="200">Information retrieved.</response>
+        /// <returns>An array of <see cref="FontFile"/> with the available font files.</returns>
+        [HttpGet("FallbackFont/Fonts")]
+        [Authorize(Policy = Policies.DefaultAuthorization)]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        public IEnumerable<FontFile> GetFallbackFontList()
+        {
+            var encodingOptions = _serverConfigurationManager.GetEncodingOptions();
+            var fallbackFontPath = encodingOptions.FallbackFontPath;
+
+            if (!string.IsNullOrEmpty(fallbackFontPath))
+            {
+                var files = _fileSystem.GetFiles(fallbackFontPath, new[] { ".woff", ".woff2", ".ttf", ".otf" }, false, false);
+                var fontFiles = files
+                    .Select(i => new FontFile
+                    {
+                        Name = i.Name,
+                        Size = i.Length,
+                        DateCreated = _fileSystem.GetCreationTimeUtc(i),
+                        DateModified = _fileSystem.GetLastWriteTimeUtc(i)
+                    })
+                    .OrderBy(i => i.Size)
+                    .ThenBy(i => i.Name)
+                    .ThenByDescending(i => i.DateModified)
+                    .ThenByDescending(i => i.DateCreated);
+                // max total size 20M
+                const int MaxSize = 20971520;
+                var sizeCounter = 0L;
+                foreach (var fontFile in fontFiles)
+                {
+                    sizeCounter += fontFile.Size;
+                    if (sizeCounter >= MaxSize)
+                    {
+                        _logger.LogWarning("Some fonts will not be sent due to size limitations");
+                        yield break;
+                    }
+
+                    yield return fontFile;
+                }
+            }
+            else
+            {
+                _logger.LogWarning("The path of fallback font folder has not been set");
+                encodingOptions.EnableFallbackFont = false;
+            }
+        }
+
+        /// <summary>
+        /// Gets a fallback font file.
+        /// </summary>
+        /// <param name="name">The name of the fallback font file to get.</param>
+        /// <response code="200">Fallback font file retrieved.</response>
+        /// <returns>The fallback font file.</returns>
+        [HttpGet("FallbackFont/Fonts/{name}")]
+        [Authorize(Policy = Policies.DefaultAuthorization)]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        [ProducesFile("font/*")]
+        public ActionResult GetFallbackFont([FromRoute, Required] string name)
+        {
+            var encodingOptions = _serverConfigurationManager.GetEncodingOptions();
+            var fallbackFontPath = encodingOptions.FallbackFontPath;
+
+            if (!string.IsNullOrEmpty(fallbackFontPath))
+            {
+                var fontFile = _fileSystem.GetFiles(fallbackFontPath)
+                    .First(i => string.Equals(i.Name, name, StringComparison.OrdinalIgnoreCase));
+                var fileSize = fontFile?.Length;
+
+                if (fontFile != null && fileSize != null && fileSize > 0)
+                {
+                    _logger.LogDebug("Fallback font size is {fileSize} Bytes", fileSize);
+                    return PhysicalFile(fontFile.FullName, MimeTypes.GetMimeType(fontFile.FullName));
+                }
+                else
+                {
+                    _logger.LogWarning("The selected font is null or empty");
+                }
+            }
+            else
+            {
+                _logger.LogWarning("The path of fallback font folder has not been set");
+                encodingOptions.EnableFallbackFont = false;
+            }
+
+            // returning HTTP 204 will break the SubtitlesOctopus
+            return Ok();
+        }
+    }
+}