完善直播节点监控与边缘代理

backend/routes/streams.py

@@ -62,14 +62,23 @@ async def list_streams(db: AsyncSession = Depends(get_db)):
 
 @router.post("")
 async def create_stream(body: StreamCreate, db: AsyncSession = Depends(get_db),
-                        _: bool = Depends(require_auth)):
+                         _: bool = Depends(require_auth)):
+    title = body.title.strip()
+    if not title:
+        raise HTTPException(status_code=422, detail="直播标题不能为空")
     svc = StreamService(db)
-    stream = await svc.create_stream(
-        title=body.title,
-        description=body.description,
-        cover_url=body.cover_url,
-        scheduled_at=body.scheduled_at,
-    )
+    try:
+        stream = await svc.create_stream(
+            title=title,
+            description=body.description,
+            cover_url=body.cover_url,
+            scheduled_at=body.scheduled_at,
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=422, detail=str(exc)) from exc
+    except Exception as exc:
+        await db.rollback()
+        raise HTTPException(status_code=500, detail="创建直播失败，请检查日期格式和数据库状态") from exc
     rtmp_url = media_service.get_rtmp_url(stream.stream_key)
     return {
         "id": stream.id,
@@ -179,6 +188,7 @@ async def get_stream_by_key(stream_key: str, request: Request, db: AsyncSession
         "title": s.title,
         "status": s.status.value,
         "multicast_available": urls["multicast_available"],
+        "selected_node": urls.get("selected_node"),
         "lines": urls["lines"],
         "qualities": urls["qualities"],
     }