完善直播节点监控与边缘代理

backend/services/load_balancer.py

@@ -132,6 +132,12 @@ class LoadBalancer:
                     "bandwidth_mbps": h.get("bandwidth_mbps"),
                     "active_connections": h.get("active_connections"),
                     "hls_readers": h.get("hls_readers"),
+                    "network_in_mbps": h.get("network_in_mbps"),
+                    "network_out_mbps": h.get("network_out_mbps"),
+                    "viewer_count": h.get("viewer_count"),
+                    "frame_drop_indicators": h.get("frame_drop_indicators"),
+                    "packet_loss_indicators": h.get("packet_loss_indicators"),
+                    "media_metrics_available": h.get("media_metrics_available", False),
                 } if h else None,
             }
         return result

backend/services/node_store.py

@@ -0,0 +1,27 @@
+import json
+from pathlib import Path
+
+from config import settings
+
+
+STORE_PATH = Path(__file__).resolve().parent.parent / "nodes.json"
+
+
+def load_nodes() -> None:
+    if not STORE_PATH.exists():
+        return
+    try:
+        nodes = json.loads(STORE_PATH.read_text(encoding="utf-8"))
+    except (OSError, json.JSONDecodeError):
+        return
+    if isinstance(nodes, list):
+        settings.edge_nodes = nodes
+
+
+def save_nodes() -> None:
+    temporary = STORE_PATH.with_suffix(".json.tmp")
+    temporary.write_text(
+        json.dumps(settings.edge_nodes, ensure_ascii=False, indent=2),
+        encoding="utf-8",
+    )
+    temporary.replace(STORE_PATH)

backend/services/stream_service.py

@@ -7,6 +7,7 @@ from services.multicast_detector import multicast_detector
 from services.transcoder import transcode_mgr
 from config import settings
 import json
+from datetime import datetime
 
 
 class StreamService:
@@ -17,13 +18,19 @@ class StreamService:
                             cover_url: str | None = None,
                             scheduled_at: str | None = None) -> Stream:
         import uuid
+        scheduled_datetime = None
+        if scheduled_at:
+            try:
+                scheduled_datetime = datetime.fromisoformat(scheduled_at.replace("Z", "+00:00"))
+            except ValueError as exc:
+                raise ValueError("预定开播时间格式无效") from exc
         stream = Stream(
             title=title,
             description=description,
             cover_url=cover_url,
             stream_key=uuid.uuid4().hex,
             status=StreamStatus.pending,
-            scheduled_at=scheduled_at,
+            scheduled_at=scheduled_datetime,
         )
         self.db.add(stream)
         await self.db.commit()
@@ -113,4 +120,8 @@ class StreamService:
             "lines": lines,
             "qualities": [{"label": q["label"], "width": q["width"], "height": q["height"]} for q in settings.qualities],
             "multicast_available": multicast_detector.is_available(),
+            "selected_node": {
+                "id": best_node["id"],
+                "name": best_node["name"],
+            } if best_node else None,
         }