fix: stream long-running website operations

backend/test_sync_upstream_models.py

@@ -408,3 +408,79 @@ def test_sync_upstream_models_empty_key_value_skips_account(db_session, monkeypa
         assert len(update_calls) == 0, f"不应调用 update_account，实际调用：{update_calls}"
     finally:
         app.dependency_overrides.clear()
+
+
+def test_sync_upstream_models_concurrent_lock_json_endpoint(db_session, monkeypatch):
+    """同步上游模型 JSON 接口：并发调用返回 HTTP 409。"""
+    w = Website(
+        name="W1", site_type="sub2api", base_url="http://w1",
+        enabled=True, auth_config_json="{}", timeout_seconds=30,
+    )
+    db_session.add(w)
+    db_session.commit()
+    db_session.refresh(w)
+
+    from fastapi.testclient import TestClient
+    from app.main import app
+    from app.database import get_db
+    from app.utils.auth import get_current_user
+
+    app.dependency_overrides[get_db] = lambda: db_session
+    app.dependency_overrides[get_current_user] = lambda: None
+
+    try:
+        client = TestClient(app)
+        from app.routers.websites import _try_start_task, _finish_task
+        ok, _sync_token = _try_start_task(w.id, "sync_models")
+        assert ok
+        try:
+            resp = client.post(f"/api/websites/{w.id}/accounts/sync-upstream-models")
+            assert resp.status_code == 409
+            assert "正在执行中" in resp.json()["detail"]
+        finally:
+            _finish_task(w.id, "sync_models", _sync_token)
+
+        resp2 = client.post(f"/api/websites/{w.id}/accounts/sync-upstream-models")
+        assert resp2.status_code == 200
+    finally:
+        app.dependency_overrides.clear()
+
+
+def test_sync_upstream_models_concurrent_lock_stream_endpoint(db_session, monkeypatch):
+    """同步上游模型流式接口：并发调用返回 error 事件。"""
+    w = Website(
+        name="W1", site_type="sub2api", base_url="http://w1",
+        enabled=True, auth_config_json="{}", timeout_seconds=30,
+    )
+    db_session.add(w)
+    db_session.commit()
+    db_session.refresh(w)
+
+    from fastapi.testclient import TestClient
+    from app.main import app
+    from app.database import get_db
+    from app.utils.auth import get_current_user
+
+    app.dependency_overrides[get_db] = lambda: db_session
+    app.dependency_overrides[get_current_user] = lambda: None
+
+    try:
+        client = TestClient(app)
+        from app.routers.websites import _try_start_task, _finish_task
+        ok, _sync_token = _try_start_task(w.id, "sync_models")
+        assert ok
+        try:
+            resp = client.post(f"/api/websites/{w.id}/accounts/sync-upstream-models/stream")
+            assert resp.status_code == 200
+            lines = [line if isinstance(line, str) else line.decode("utf-8") for line in resp.iter_lines() if line]
+            parsed_events = [json.loads(line) for line in lines]
+            assert len(parsed_events) == 1
+            assert parsed_events[0]["event"] == "error"
+            assert "正在执行中" in parsed_events[0]["data"]["message"]
+        finally:
+            _finish_task(w.id, "sync_models", _sync_token)
+
+        resp2 = client.post(f"/api/websites/{w.id}/accounts/sync-upstream-models/stream")
+        assert resp2.status_code == 200
+    finally:
+        app.dependency_overrides.clear()