NotS1mp/Musify
0
0
Fork 0
Code Issues 23 Pull Requests Actions Packages Projects Releases Wiki Activity

perf(backend): cache YouTube searches and shrink the thumbnail URLs

Browse Source 
Repeated searches and song lookups now reuse a single-flight memory cache, so
concurrent or debounced queries hit YouTube once instead of on every keystroke.
Thumbnails are resolved at a configurable size instead of the largest variant,
which cuts the image payload the browser pulls from Google.
This commit is contained in:
Admin
2026-07-20 17:29:28 +02:00
parent 7c62f8a8e8
commit dd3150e3d4
5 changed files with 144 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
backend/Musify.Infrastructure/Services/YouTubeMusicService.cs
+38 -8
View File
@@ -13,10 +13,22 @@ namespace Musify.Infrastructure.Services
public class YouTubeMusicService(YouTubeConfiguration configuration, IMemoryCache cache, ILogger<YouTubeMusicService> logger) : IYouTubeMusicService
{
private readonly YouTubeMusicClient client = new(geographicalLocation: configuration.GeographicalLocation);
private readonly SingleFlightCache singleFlight = new(cache);
private sealed record CachedStreamInfo(string Url, DateTime ExpiresAtUtc);
public async Task<ErrorOr<YouTubeSearchResult>> SearchSongsAsync(string query, string continuationToken, CancellationToken cancellationToken)
{
if (!string.IsNullOrEmpty(continuationToken))
return await FetchSearchPageAsync(query, continuationToken, cancellationToken);
return await singleFlight.GetOrCreateAsync(
SearchResultsCacheKey(query),
TimeSpan.FromSeconds(configuration.SearchResultsCacheSeconds),
() => FetchSearchPageAsync(query, continuationToken, cancellationToken));
}
private async Task<ErrorOr<YouTubeSearchResult>> FetchSearchPageAsync(string query, string continuationToken, CancellationToken cancellationToken)
{
PaginatedAsyncEnumerable<SearchResult>? paginator;
if (string.IsNullOrEmpty(continuationToken))
@@ -47,10 +59,7 @@ namespace Musify.Infrastructure.Services
string.Join(", ", song.Artists.Select(artist => artist.Name)),
song.Album?.Name ?? string.Empty,
(int)song.Duration.TotalSeconds,
song.Thumbnails
.OrderByDescending(thumbnail => thumbnail.Width)
.Select(thumbnail => thumbnail.Url)
.FirstOrDefault() ?? string.Empty,
PickThumbnail(song.Thumbnails),
song.IsExplicit,
song.Artists
.Select(artist => new YouTubeArtistRef(
@@ -117,6 +126,14 @@ namespace Musify.Infrastructure.Services
}
public async Task<ErrorOr<YouTubeSongResult>> GetSongAsync(string videoId, CancellationToken cancellationToken)
{
return await singleFlight.GetOrCreateAsync(
SongInfoCacheKey(videoId),
TimeSpan.FromSeconds(configuration.SongInfoCacheSeconds),
() => FetchSongAsync(videoId, cancellationToken));
}
private async Task<ErrorOr<YouTubeSongResult>> FetchSongAsync(string videoId, CancellationToken cancellationToken)
{
try
{
@@ -128,10 +145,7 @@ namespace Musify.Infrastructure.Services
string.Join(", ", info.Artists.Select(artist => artist.Name)),
string.Empty,
(int)info.Duration.TotalSeconds,
info.Thumbnails
.OrderByDescending(thumbnail => thumbnail.Width)
.Select(thumbnail => thumbnail.Url)
.FirstOrDefault() ?? string.Empty,
PickThumbnail(info.Thumbnails),
info.IsExplicit,
info.Artists
.Select(artist => new YouTubeArtistRef(
@@ -146,8 +160,24 @@ namespace Musify.Infrastructure.Services
}
}
private string PickThumbnail(IEnumerable<YouTubeMusicAPI.Models.Thumbnail> thumbnails)
{
var ordered = thumbnails.OrderBy(thumbnail => thumbnail.Width).ToList();
var chosen = ordered.FirstOrDefault(thumbnail => thumbnail.Width >= configuration.ThumbnailSize)
?? ordered.LastOrDefault();
return chosen is null
? string.Empty
: YouTubeThumbnail.WithSize(chosen.Url, configuration.ThumbnailSize);
}
private static string SearchCacheKey(string token) => $"yt-search:{token}";
private static string SearchResultsCacheKey(string query) => $"yt-search-results:{query.Trim().ToLowerInvariant()}";
private static string SongInfoCacheKey(string videoId) => $"yt-song:{videoId}";
private static string StreamCacheKey(string videoId) => $"yt-stream:{videoId}";
}
}