feature: Embed Frame Player

DeepDrftPublic/Controllers/TrackProxyController.cs

@@ -59,6 +59,41 @@ public class TrackProxyController : ControllerBase
         }
     }
 
+    /// <summary>
+    /// Proxies single-track metadata lookup by vault entry key from DeepDrftAPI. Unauthenticated,
+    /// same posture as the paged listing. Small JSON, so it is buffered and relayed; a 404 from
+    /// upstream (no track with that entry key) passes through. Declared before the parameterized
+    /// "{trackId}" route, though the 3-segment template makes a collision impossible regardless.
+    /// </summary>
+    [HttpGet("meta/by-key/{entryKey}")]
+    public async Task<ActionResult> GetMetaByKey(string entryKey, CancellationToken ct = default)
+    {
+        var path = $"api/track/meta/by-key/{Uri.EscapeDataString(entryKey)}";
+
+        HttpResponseMessage upstream;
+        try
+        {
+            upstream = await _upstream.GetAsync(path, HttpCompletionOption.ResponseHeadersRead, ct);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Upstream call to DeepDrftAPI track/meta/by-key/{EntryKey} failed", entryKey);
+            return StatusCode(502, "Upstream unavailable");
+        }
+
+        using (upstream)
+        {
+            if (!upstream.IsSuccessStatusCode)
+            {
+                _logger.LogWarning("DeepDrftAPI track/meta/by-key/{EntryKey} returned {Status}", entryKey, (int)upstream.StatusCode);
+                return StatusCode((int)upstream.StatusCode);
+            }
+
+            var json = await upstream.Content.ReadAsStringAsync(ct);
+            return Content(json, "application/json");
+        }
+    }
+
     /// <summary>
     /// Proxies audio streaming from DeepDrftAPI. Passes the optional byte offset
     /// so seek-beyond-buffer works through the proxy without buffering.