Add waveform profile HTTP transport: API endpoint, public proxy, content client method

2026-06-05 16:57:42 -04:00
parent 9d39843982
commit de4583b759
3 changed files with 96 additions and 0 deletions
@@ -106,4 +106,38 @@ public class TrackProxyController : ControllerBase
        HttpContext.Response.RegisterForDispose(upstream);
        return File(stream, contentType, enableRangeProcessing: false);
    }
+
+    /// <summary>
+    /// Proxies a track's stored waveform profile (JSON) from DeepDrftAPI. Unauthenticated,
+    /// same posture as the audio stream forward. The profile is small JSON, so it is buffered
+    /// and relayed rather than streamed; a 404 from upstream (no profile stored) passes through.
+    /// </summary>
+    [HttpGet("{trackId}/waveform")]
+    public async Task<ActionResult> GetWaveform(string trackId, CancellationToken ct = default)
+    {
+        var path = $"api/track/{Uri.EscapeDataString(trackId)}/waveform";
+
+        HttpResponseMessage upstream;
+        try
+        {
+            upstream = await _upstream.GetAsync(path, HttpCompletionOption.ResponseHeadersRead, ct);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Upstream call to DeepDrftAPI track/{TrackId}/waveform failed", trackId);
+            return StatusCode(502, "Upstream unavailable");
+        }
+
+        using (upstream)
+        {
+            if (!upstream.IsSuccessStatusCode)
+            {
+                _logger.LogWarning("DeepDrftAPI track/{TrackId}/waveform returned {Status}", trackId, (int)upstream.StatusCode);
+                return StatusCode((int)upstream.StatusCode);
+            }
+
+            var json = await upstream.Content.ReadAsStringAsync(ct);
+            return Content(json, "application/json");
+        }
+    }
 }