Add track filtering, WS keepalive, and improve error handling

- Add track filtering by uploader (my tracks / all tracks) with UI tabs
- Add WebSocket ping/pong keepalive (30s interval) to prevent disconnects
- Add auto-reconnect on WebSocket close (3s delay)
- Add request logging middleware with DATABASE_URL output on startup
- Handle missing S3 files gracefully (return 404 instead of 500)
- Add debug logging for audio ended event

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

backend/app/main.py

@@ -1,13 +1,23 @@
 import asyncio
+import logging
 from contextlib import asynccontextmanager
 from datetime import datetime
-from fastapi import FastAPI
+from fastapi import FastAPI, Request
 from fastapi.middleware.cors import CORSMiddleware
 from sqlalchemy import select
 from .routers import auth, rooms, tracks, websocket, messages
 from .database import async_session
 from .models.room import Room
 from .services.sync import manager
+from .config import get_settings
+
+# Setup logging
+logging.basicConfig(level=logging.INFO)
+logger = logging.getLogger(__name__)
+
+# Log config on startup
+settings = get_settings()
+logger.info(f"DATABASE_URL: {settings.database_url}")
 
 
 async def periodic_sync():
@@ -65,6 +75,15 @@ async def lifespan(app: FastAPI):
 
 app = FastAPI(title="EnigFM", description="Listen to music together with friends", lifespan=lifespan)
 
+
+@app.middleware("http")
+async def log_requests(request: Request, call_next):
+    logger.info(f"Request: {request.method} {request.url.path}")
+    response = await call_next(request)
+    logger.info(f"Response: {request.method} {request.url.path} - {response.status_code}")
+    return response
+
+
 # CORS
 app.add_middleware(
     CORSMiddleware,

backend/app/routers/tracks.py

@@ -19,8 +19,16 @@ router = APIRouter(prefix="/api/tracks", tags=["tracks"])
 
 
 @router.get("", response_model=list[TrackResponse])
-async def get_tracks(db: AsyncSession = Depends(get_db)):
-    result = await db.execute(select(Track).order_by(Track.created_at.desc()))
+async def get_tracks(
+    my: bool = False,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user)
+):
+    query = select(Track)
+    if my:
+        query = query.where(Track.uploaded_by == current_user.id)
+    query = query.order_by(Track.created_at.desc())
+    result = await db.execute(query)
     return result.scalars().all()
 
 
@@ -174,6 +182,8 @@ async def stream_track(track_id: uuid.UUID, request: Request, db: AsyncSession =
 
     # Get file size from S3 (without downloading)
     file_size = get_file_size(track.s3_key)
+    if file_size is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Track file not found in storage")
 
     # Encode filename for non-ASCII characters
     encoded_filename = quote(f"{track.title}.mp3")

backend/app/routers/websocket.py

@@ -58,6 +58,11 @@ async def room_websocket(websocket: WebSocket, room_id: UUID):
             data = await websocket.receive_text()
             message = json.loads(data)
 
+            # Handle ping/pong for keepalive
+            if message.get("type") == "ping":
+                await websocket.send_json({"type": "pong"})
+                continue
+
             async with async_session() as db:
                 if message["type"] == "player_action":
                     await handle_player_action(db, room_id, user, message)

backend/app/services/s3.py

@@ -77,11 +77,16 @@ def get_file_content(s3_key: str) -> bytes:
     return response["Body"].read()
 
 
-def get_file_size(s3_key: str) -> int:
-    """Get file size from S3 without downloading"""
+def get_file_size(s3_key: str) -> int | None:
+    """Get file size from S3 without downloading. Returns None if file not found."""
     client = get_s3_client()
-    response = client.head_object(Bucket=settings.s3_bucket_name, Key=s3_key)
-    return response["ContentLength"]
+    try:
+        response = client.head_object(Bucket=settings.s3_bucket_name, Key=s3_key)
+        return response["ContentLength"]
+    except client.exceptions.ClientError as e:
+        if e.response['Error']['Code'] == '404':
+            return None
+        raise
 
 
 def get_file_range(s3_key: str, start: int, end: int):

frontend/src/stores/activeRoom.js

@@ -22,6 +22,10 @@ export const useActiveRoomStore = defineStore('activeRoom', () => {
   let pendingPlay = false
   let pendingPosition = null
 
+  // WebSocket keepalive
+  let pingInterval = null
+  let reconnectTimeout = null
+
   const isInRoom = computed(() => roomId.value !== null)
 
   function initAudio() {
@@ -53,10 +57,15 @@ export const useActiveRoomStore = defineStore('activeRoom', () => {
     })
 
     audio.addEventListener('ended', () => {
+      console.log('Track ended event fired')
       if (onTrackEndedCallback) {
         onTrackEndedCallback()
       }
     })
+
+    audio.addEventListener('error', (e) => {
+      console.error('Audio error:', e, audio.error)
+    })
   }
 
   function connect(id, name) {
@@ -74,10 +83,36 @@ export const useActiveRoomStore = defineStore('activeRoom', () => {
     ws.value.onopen = () => {
       connected.value = true
       send({ type: 'sync_request' })
+
+      // Start ping interval (every 30 seconds)
+      if (pingInterval) clearInterval(pingInterval)
+      pingInterval = setInterval(() => {
+        if (ws.value && ws.value.readyState === WebSocket.OPEN) {
+          send({ type: 'ping' })
+        }
+      }, 30000)
     }
 
     ws.value.onclose = () => {
       connected.value = false
+      if (pingInterval) {
+        clearInterval(pingInterval)
+        pingInterval = null
+      }
+
+      // Auto-reconnect after 3 seconds if we still have room info
+      if (roomId.value && !reconnectTimeout) {
+        reconnectTimeout = setTimeout(() => {
+          reconnectTimeout = null
+          if (roomId.value) {
+            console.log('Reconnecting WebSocket...')
+            const savedId = roomId.value
+            const savedName = roomName.value
+            ws.value = null
+            connect(savedId, savedName)
+          }
+        }, 3000)
+      }
     }
 
     ws.value.onerror = () => {}
@@ -94,13 +129,26 @@ export const useActiveRoomStore = defineStore('activeRoom', () => {
   }
 
   function disconnect() {
+    // Clear timers
+    if (pingInterval) {
+      clearInterval(pingInterval)
+      pingInterval = null
+    }
+    if (reconnectTimeout) {
+      clearTimeout(reconnectTimeout)
+      reconnectTimeout = null
+    }
+
+    // Clear room info first to prevent auto-reconnect
+    const wasInRoom = roomId.value
+    roomId.value = null
+    roomName.value = null
+
     if (ws.value) {
       ws.value.close()
       ws.value = null
     }
     connected.value = false
-    roomId.value = null
-    roomName.value = null
     chatMessages.value = []
     playerStore.reset()
     if (audio) {

frontend/src/stores/tracks.js

@@ -6,10 +6,10 @@ export const useTracksStore = defineStore('tracks', () => {
   const tracks = ref([])
   const loading = ref(false)
 
-  async function fetchTracks() {
+  async function fetchTracks(myOnly = false) {
     loading.value = true
     try {
-      const response = await api.get('/api/tracks')
+      const response = await api.get('/api/tracks', { params: { my: myOnly } })
       tracks.value = response.data
     } finally {
       loading.value = false

frontend/src/views/TracksView.vue

@@ -5,6 +5,21 @@
       <button class="btn-primary" @click="showUpload = true">Загрузить трек</button>
     </div>
 
+    <div class="filter-tabs">
+      <button
+        :class="['filter-tab', { active: !showMyOnly }]"
+        @click="setFilter(false)"
+      >
+        Все треки
+      </button>
+      <button
+        :class="['filter-tab', { active: showMyOnly }]"
+        @click="setFilter(true)"
+      >
+        Мои треки
+      </button>
+    </div>
+
     <div v-if="tracksStore.loading" class="loading">Загрузка...</div>
 
     <div v-else-if="tracksStore.tracks.length === 0" class="empty">
@@ -34,11 +49,17 @@ import Modal from '../components/common/Modal.vue'
 const tracksStore = useTracksStore()
 
 const showUpload = ref(false)
+const showMyOnly = ref(false)
 
 onMounted(() => {
   tracksStore.fetchTracks()
 })
 
+function setFilter(myOnly) {
+  showMyOnly.value = myOnly
+  tracksStore.fetchTracks(myOnly)
+}
+
 async function handleDelete(track) {
   if (confirm(`Удалить трек "${track.title}"?`)) {
     await tracksStore.deleteTrack(track.id)
@@ -71,4 +92,29 @@ async function handleDelete(track) {
   padding: 40px;
   color: #aaa;
 }
+
+.filter-tabs {
+  display: flex;
+  gap: 8px;
+  margin-bottom: 16px;
+}
+
+.filter-tab {
+  padding: 8px 16px;
+  background: #333;
+  border: none;
+  border-radius: 20px;
+  color: #aaa;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.filter-tab:hover {
+  background: #444;
+}
+
+.filter-tab.active {
+  background: var(--color-primary, #1db954);
+  color: #fff;
+}
 </style>