Enhance configuration and routing for streaming features: update .env.example and appsettings.json to include new scheduler and streaming options, add streaming endpoint mapping in Program.cs, and integrate streaming services in DependencyInjection. Introduce segment path resolution in MediaPathResolver for asset management.

2026-07-24 16:07:37 +03:00
parent 4fa9dae37f
commit 1bbfd15907
18 changed files with 686 additions and 0 deletions
@@ -0,0 +1,164 @@
+using System.Globalization;
+using System.Text;
+using System.Text.RegularExpressions;
+using LiteCqrs;
+using TeleWave.Api.Common;
+using TeleWave.Application.Common.Interfaces;
+using TeleWave.Application.Streaming;
+using TeleWave.Application.Streaming.GetLivePlaylist;
+using TeleWave.Application.Streaming.GetPublicEpg;
+using TeleWave.Application.Streaming.ListPublicChannels;
+using TeleWave.Infrastructure.Media;
+using TeleWave.Infrastructure.Streaming;
+
+namespace TeleWave.Api.Endpoints;
+
+public static class StreamingEndpoints
+{
+    private const string StreamCookieName = "tw_stream";
+    private static readonly Regex SegmentFileName = new(@"^seg\d{1,6}\.ts$", RegexOptions.Compiled);
+
+    public static IEndpointRouteBuilder MapStreamingEndpoints(this IEndpointRouteBuilder app)
+    {
+        // Публичный API канала (Bearer): список, EPG, выдача stream-cookie.
+        var channels = app.MapGroup("/api/channels").WithTags("Channels").RequireAuthorization();
+        channels.MapGet("", ListChannels).Produces<IReadOnlyList<PublicChannelDto>>();
+        channels.MapPost("/{slug}/watch", Watch).Produces(StatusCodes.Status204NoContent);
+        channels.MapGet("/{slug}/epg", Epg);
+
+        // Раздача эфира (cookie tw_stream): плейлист и сегменты — их грузит <video>/hls.js.
+        app.MapGet("/api/channels/{slug}/live.m3u8", LivePlaylist).WithTags("Streaming");
+        app.MapGet("/api/stream/{assetId:guid}/{file}", Segment).WithTags("Streaming");
+
+        return app;
+    }
+
+    private static async Task<IResult> ListChannels(ISender sender, CancellationToken cancellationToken)
+    {
+        var result = await sender.Send(new ListPublicChannelsQuery(), cancellationToken);
+        return Results.Ok(result);
+    }
+
+    private static IResult Watch(
+        string slug,
+        ICurrentUser currentUser,
+        StreamTokenService tokens,
+        HttpRequest request,
+        HttpResponse response
+    )
+    {
+        if (currentUser.UserId is not { } userId)
+            return Results.Unauthorized();
+
+        var (token, expiresAt) = tokens.Issue(userId);
+        response.Cookies.Append(
+            StreamCookieName,
+            token,
+            new CookieOptions
+            {
+                HttpOnly = true,
+                Secure = request.IsHttps,
+                SameSite = SameSiteMode.Strict,
+                Path = "/api",
+                Expires = expiresAt,
+            }
+        );
+        return Results.NoContent();
+    }
+
+    private static async Task<IResult> Epg(
+        string slug,
+        DateTimeOffset? from,
+        DateTimeOffset? to,
+        ISender sender,
+        CancellationToken cancellationToken
+    )
+    {
+        var fromUtc = from ?? DateTimeOffset.UtcNow;
+        var toUtc = to ?? fromUtc.AddHours(12);
+        var result = await sender.Send(
+            new GetPublicEpgQuery(slug, fromUtc, toUtc),
+            cancellationToken
+        );
+        return result.ToHttpResult();
+    }
+
+    private static async Task<IResult> LivePlaylist(
+        string slug,
+        HttpRequest request,
+        HttpResponse response,
+        StreamTokenService tokens,
+        ISender sender,
+        CancellationToken cancellationToken
+    )
+    {
+        if (!tokens.Validate(request.Cookies[StreamCookieName]))
+            return Results.Unauthorized();
+
+        var result = await sender.Send(
+            new GetLivePlaylistQuery(slug, DateTimeOffset.UtcNow),
+            cancellationToken
+        );
+        if (!result.IsSuccess)
+            return result.ToHttpResult();
+        if (result.Value.Segments.Count == 0)
+            return Results.StatusCode(StatusCodes.Status503ServiceUnavailable);
+
+        response.Headers.CacheControl = "no-cache";
+        return Results.Text(Render(result.Value), "application/vnd.apple.mpegurl");
+    }
+
+    private static IResult Segment(
+        Guid assetId,
+        string file,
+        HttpRequest request,
+        HttpResponse response,
+        StreamTokenService tokens,
+        MediaPathResolver paths
+    )
+    {
+        if (!tokens.Validate(request.Cookies[StreamCookieName]))
+            return Results.Unauthorized();
+        if (!SegmentFileName.IsMatch(file))
+            return Results.NotFound();
+
+        string path;
+        try
+        {
+            path = paths.SegmentPath(assetId, file);
+        }
+        catch (UnauthorizedAccessException)
+        {
+            return Results.NotFound();
+        }
+
+        if (!File.Exists(path))
+            return Results.NotFound();
+
+        response.Headers.CacheControl = "public, max-age=31536000, immutable";
+        return Results.File(path, "video/mp2t", enableRangeProcessing: true);
+    }
+
+    private static string Render(LivePlaylistDto playlist)
+    {
+        var extinf = playlist.TargetDuration.ToString("F6", CultureInfo.InvariantCulture);
+        var sb = new StringBuilder();
+        sb.Append("#EXTM3U\n");
+        sb.Append("#EXT-X-VERSION:3\n");
+        sb.Append(CultureInfo.InvariantCulture, $"#EXT-X-TARGETDURATION:{playlist.TargetDuration}\n");
+        sb.Append(CultureInfo.InvariantCulture, $"#EXT-X-MEDIA-SEQUENCE:{playlist.MediaSequence}\n");
+
+        foreach (var segment in playlist.Segments)
+        {
+            if (segment.Discontinuity)
+                sb.Append("#EXT-X-DISCONTINUITY\n");
+            sb.Append(CultureInfo.InvariantCulture, $"#EXTINF:{extinf},\n");
+            sb.Append(
+                CultureInfo.InvariantCulture,
+                $"/api/stream/{segment.AssetId:N}/seg{segment.LocalIndex:D5}.ts\n"
+            );
+        }
+
+        return sb.ToString();
+    }
+}