Return partial city detail batches

docker-compose.yml

@@ -79,7 +79,7 @@ services:
       timeout: 5s
     image: ghcr.io/yangyuan-zhen/polyweather-frontend:${IMAGE_TAG:-latest}
     ports:
-    - 3001:3000
+    - "127.0.0.1:3001:3000"
     restart: unless-stopped
   polyweather_web:
     command: python web/app.py
@@ -104,7 +104,7 @@ services:
       timeout: 5s
     image: ghcr.io/yangyuan-zhen/polyweather-backend:${IMAGE_TAG:-latest}
     ports:
-    - 8000:8000
+    - "127.0.0.1:8000:8000"
     restart: unless-stopped
     user: ${UID:-1000}:${GID:-1000}
     volumes:

frontend/app/api/cities/detail-batch/route.ts

@@ -42,8 +42,13 @@ export async function GET(req: NextRequest) {
   try {
     return await proxyBackendJsonGet(req, {
       cacheControl: cachePolicy.responseCacheControl,
-      fetchCache:
+      cacheControlForData: (data) =>
-        cachePolicy.fetchMode === "no-store" ? "no-store" : undefined,
+        data &&
+        typeof data === "object" &&
+        (data as { partial?: unknown }).partial === true
+          ? "no-store, max-age=0"
+          : cachePolicy.responseCacheControl,
+      fetchCache: "no-store",
       publicMessage: "Failed to fetch city detail batch",
       revalidateSeconds: cachePolicy.revalidateSeconds,
       signal: controller.signal,

frontend/components/dashboard/scan-terminal/__tests__/refreshCadencePolicy.test.ts

@@ -96,6 +96,18 @@ export async function runTests() {
       chartLogicSource.includes("primeCityDetailCache"),
     "visible terminal chart detail fetches should be coalesced into one batch request and prime the shared chart cache",
   );
+  assert(
+    chartLogicSource.includes("partial?: boolean") &&
+      chartLogicSource.includes("missing?: string[]"),
+    "frontend city detail batch payload should understand partial responses and missing city markers",
+  );
+  const flushCityDetailBatchBlock = chartLogicSource.match(/async function flushCityDetailBatch[\s\S]*?\r?\n}\r?\n\r?\nfunction fetchCityDetailBatchWithTimeout/)?.[0] || "";
+  assert(
+    flushCityDetailBatchBlock.includes("partialMissingCities") &&
+      flushCityDetailBatchBlock.includes("resolveBatchWaiters(waiters, null)") &&
+      flushCityDetailBatchBlock.includes("payload?.partial === true"),
+    "partial detail-batch misses should resolve without immediately issuing single-city fallback requests",
+  );
   const fetchHourlyBlock = chartLogicSource.match(/async function fetchHourlyForecastForCity[\s\S]*?\r?\n}\r?\n\r?\nfunction fetchCityDetailWithTimeout/)?.[0] || "";
   assert(
     fetchHourlyBlock.includes("queueCityDetailBatch(city, resParam)") &&

frontend/components/dashboard/scan-terminal/temperature-chart-logic.ts

@@ -966,8 +966,11 @@ type HourlyForecastFetchOptions = {
 };
 
 type CityDetailBatchPayload = {
+  cities?: string[];
   details?: Record<string, CityDetail | null | undefined>;
   errors?: Record<string, string>;
+  missing?: string[];
+  partial?: boolean;
 };
 
 type CityDetailBatchWaiter = {
@@ -1112,6 +1115,10 @@ async function flushCityDetailBatch(resolution: string) {
   try {
     const payload = await fetchCityDetailBatchWithTimeout(cities, resolution);
     const details = payload?.details || {};
+    const partialMissingCities =
+      payload?.partial === true
+        ? new Set((payload.missing || []).map((city) => normalizeCityKey(city)))
+        : new Set<string>();
     await Promise.all(
       cities.map(async (city) => {
         const waiters = queue.waiters.get(city);
@@ -1121,6 +1128,10 @@ async function flushCityDetailBatch(resolution: string) {
           resolveBatchWaiters(waiters, data);
           return;
         }
+        if (partialMissingCities.has(normalizeCityKey(city))) {
+          resolveBatchWaiters(waiters, null);
+          return;
+        }
         try {
           resolveBatchWaiters(
             waiters,

frontend/components/ops/__tests__/apiPerformanceTiming.test.ts

@@ -41,6 +41,21 @@ export function runTests() {
   const detailBatchProxy = readFrontend("app", "api", "cities", "detail-batch", "route.ts");
   assert.match(detailBatchProxy, /createProxyTimer\(req,\s*"city_detail_batch"\)/);
   assert.match(detailBatchProxy, /timing:\s*timer/);
+  assert.match(
+    detailBatchProxy,
+    /fetchCache:\s*"no-store"/,
+    "city detail batch proxy should avoid caching partial backend fetches in the Next data cache",
+  );
+  assert.match(
+    detailBatchProxy,
+    /cacheControlForData/,
+    "city detail batch proxy should be able to suppress response caching for partial payloads",
+  );
+  assert.match(
+    apiProxySource,
+    /cacheControlForData\?:/,
+    "generic backend JSON proxy should allow response cache policy to depend on parsed data",
+  );
 
   const scanTerminalProxy = readFrontend("app", "api", "scan", "terminal", "route.ts");
   assert.match(scanTerminalProxy, /createProxyTimer\(req,\s*"scan_terminal"\)/);

frontend/lib/api-proxy.ts

@@ -85,6 +85,7 @@ export async function proxyBackendJsonGet(
   req: NextRequest,
   options: {
     cacheControl?: string;
+    cacheControlForData?: (data: unknown) => string | undefined;
     conditionalResponse?: boolean;
     detailLimit?: number;
     error?: string;
@@ -148,12 +149,14 @@ export async function proxyBackendJsonGet(
     const data = await (timing
       ? timing.measure("backend_read", () => res.json())
       : res.json());
+    const responseCacheControl =
+      options.cacheControlForData?.(data) ?? options.cacheControl;
     const response =
-      options.cacheControl && options.conditionalResponse !== false
+      responseCacheControl && options.conditionalResponse !== false
-        ? buildCachedJsonResponse(req, data, options.cacheControl)
+        ? buildCachedJsonResponse(req, data, responseCacheControl)
         : NextResponse.json(data, {
-            headers: options.cacheControl
+            headers: responseCacheControl
-              ? { "Cache-Control": options.cacheControl }
+              ? { "Cache-Control": responseCacheControl }
               : undefined,
           });
     const withCookies = applyAuthResponseCookies(response, auth.response);

tests/test_deployment_runtime_config.py

@@ -80,6 +80,15 @@ def test_deploy_script_retries_startup_smoke_checks():
     assert 'smoke_check "frontend" "https://www.polyweather.top/" 15 3 5' in script
 
 
+def test_docker_compose_keeps_polyweather_ports_on_loopback():
+    compose = (ROOT / "docker-compose.yml").read_text(encoding="utf-8")
+
+    assert "127.0.0.1:3001:3000" in compose
+    assert "127.0.0.1:8000:8000" in compose
+    assert "\n    - 3001:3000" not in compose
+    assert "\n    - 8000:8000" not in compose
+
+
 def test_city_detail_builds_deb_hourly_consensus_before_peak_window():
     source = (ROOT / "web" / "analysis_service.py").read_text(encoding="utf-8")
 

tests/test_web_observability.py

@@ -618,6 +618,44 @@ def test_city_detail_batch_endpoint_limits_backend_concurrency(monkeypatch):
     assert max_active <= 2
 
 
+def test_city_detail_batch_returns_completed_details_when_one_city_is_slow(monkeypatch):
+    import asyncio
+
+    completed = []
+
+    async def build_batch_item(city, **kwargs):
+        if city == "slow":
+            await asyncio.sleep(0.08)
+        completed.append(city)
+        return city, {
+            "city": city,
+            "hourly": {"times": ["2026-05-30T00:00:00Z"], "temps": [20.0]},
+            "resolution": kwargs.get("resolution"),
+        }
+
+    monkeypatch.setenv("POLYWEATHER_CITY_DETAIL_BATCH_PARTIAL_TIMEOUT_MS", "20")
+    monkeypatch.setattr(city_api.legacy_routes, "_assert_entitlement", lambda request: None)
+    monkeypatch.setattr(city_api.legacy_routes, "_normalize_city_or_404", lambda name: name.strip().lower())
+    monkeypatch.setattr(city_api, "_build_city_detail_batch_item_async", build_batch_item)
+
+    payload = asyncio.run(
+        city_api.get_city_detail_batch_payload(
+            object(),
+            cities="fast,slow,other",
+            resolution="10m",
+            limit=3,
+        )
+    )
+
+    assert payload["cities"] == ["fast", "slow", "other"]
+    assert sorted(payload["details"]) == ["fast", "other"]
+    assert payload["details"]["fast"]["resolution"] == "10m"
+    assert payload["partial"] is True
+    assert payload["missing"] == ["slow"]
+    assert payload["errors"] == {}
+    assert "slow" not in completed
+
+
 def test_concurrent_city_detail_requests_share_same_full_cache_refresh(monkeypatch):
     import asyncio
 

web/services/city_api.py

@@ -500,6 +500,19 @@ def _city_detail_batch_concurrency() -> int:
     return max(1, min(6, value))
 
 
+def _city_detail_batch_partial_timeout_seconds() -> Optional[float]:
+    try:
+        timeout_ms = int(
+            os.getenv("POLYWEATHER_CITY_DETAIL_BATCH_PARTIAL_TIMEOUT_MS", "8500")
+            or "8500"
+        )
+    except ValueError:
+        timeout_ms = 8500
+    if timeout_ms <= 0:
+        return None
+    return max(0.001, min(60.0, timeout_ms / 1000.0))
+
+
 async def get_city_detail_batch_payload(
     request: Request,
     *,
@@ -528,7 +541,13 @@ async def get_city_detail_batch_payload(
             ),
         )
         if not city_names:
-            return {"cities": [], "details": {}, "errors": {}}
+            return {
+                "cities": [],
+                "details": {},
+                "errors": {},
+                "missing": [],
+                "partial": False,
+            }
 
         semaphore = asyncio.Semaphore(_city_detail_batch_concurrency())
 
@@ -543,27 +562,47 @@ async def get_city_detail_batch_payload(
                     timing_recorder=timer,
                 )
 
-        tasks = [
+        task_by_city = {
-            _build_with_limit(city)
+            city: asyncio.create_task(_build_with_limit(city))
             for city in city_names
-        ]
+        }
-        results = await timer.measure_async(
+        task_city_lookup = {task: city for city, task in task_by_city.items()}
+        done, pending = await timer.measure_async(
             "build_details",
-            lambda: asyncio.gather(*tasks, return_exceptions=True),
+            lambda: asyncio.wait(
+                task_by_city.values(),
+                timeout=_city_detail_batch_partial_timeout_seconds(),
+            ),
         )
         details: Dict[str, Any] = {}
         errors: Dict[str, str] = {}
-        for city, result in zip(city_names, results):
+        missing: List[str] = []
-            if isinstance(result, Exception):
+        for task in done:
-                errors[city] = str(result)
+            city = task_city_lookup[task]
+            try:
+                result_city, payload = task.result()
+            except Exception as exc:
+                errors[city] = str(exc)
                 continue
-            result_city, payload = result
             details[result_city] = payload
 
+        for task in pending:
+            city = task_city_lookup[task]
+            missing.append(city)
+            task.cancel()
+
+        missing_set = set(missing)
+        missing = [city for city in city_names if city in missing_set]
+        partial = bool(missing or errors)
+        if partial:
+            outcome = "partial"
+
         return {
             "cities": city_names,
             "details": details,
             "errors": errors,
+            "missing": missing,
+            "partial": partial,
         }
     except HTTPException as exc:
         outcome = f"http_{exc.status_code}"