diff --git a/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py b/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py index ea4ede7e513..5a2f9c391a2 100644 --- a/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py +++ b/litellm/proxy/pass_through_endpoints/pass_through_endpoints.py @@ -2090,6 +2090,22 @@ def _rewrite_vertex_live_setup_model(text_data: str, setup_model_rewriter: Calla return json.dumps({**message, "setup": {**setup, "model": rewritten_model}}) # mutable-ok: one-shot json payload +def _resolved_vertex_live_setup( + setup_data: Mapping[str, object], setup_model_rewriter: Callable[[str], str] | None +) -> Mapping[str, object]: + """ + Give the model extractor the same fully qualified path the upstream will receive. + + Clients may name a bare gateway alias, which the rewriter turns into a ``projects/...`` path before + it reaches Vertex. The extractor only reads a path containing ``/models/``, so running it on the raw + frame logs the session as ``unknown`` at no cost, which is precisely the supported client form + """ + setup_model: Final = setup_data.get("model") + if setup_model_rewriter is None or not isinstance(setup_model, str): + return setup_data + return {**setup_data, "model": setup_model_rewriter(setup_model)} + + def _truncated_close_reason(reason: str) -> str: """ Fit a close reason inside the byte budget a WebSocket close frame allows, without splitting a character @@ -2314,7 +2330,12 @@ async def websocket_passthrough_request( setup_data, ) if isinstance(setup_data, dict) and "model" in setup_data: - extracted_model = _extract_model_from_vertex_ai_setup(setup_data) + # Resolve the alias first: a client may name a bare gateway model, + # which carries no "/models/" for the extractor to read, so reading + # the raw frame leaves the session logged as "unknown" and unbilled. + extracted_model = _extract_model_from_vertex_ai_setup( + _resolved_vertex_live_setup(setup_data, setup_model_rewriter) + ) if extracted_model: kwargs["model"] = extracted_model kwargs["custom_llm_provider"] = "vertex_ai-language-models" diff --git a/tests/test_litellm/proxy/pass_through_endpoints/test_pass_through_endpoints.py b/tests/test_litellm/proxy/pass_through_endpoints/test_pass_through_endpoints.py index d57bed430c1..11066d4ed38 100644 --- a/tests/test_litellm/proxy/pass_through_endpoints/test_pass_through_endpoints.py +++ b/tests/test_litellm/proxy/pass_through_endpoints/test_pass_through_endpoints.py @@ -5030,6 +5030,100 @@ async def test_websocket_passthrough_rewrites_gateway_alias_setup_model(): assert sent_setup["model"] == "projects/proj-db/locations/global/publishers/google/models/gemini-live-2.5-flash" +@pytest.mark.parametrize( + "setup_model", + ["gemini-live-2.5-flash", "models/gemini-live-2.5-flash", "publishers/google/models/gemini-live-2.5-flash"], +) +def test_vertex_live_setup_model_resolves_before_extraction(setup_model): + """A bare gateway alias left the session logged as ``unknown`` at zero cost. + + The model was read off the raw client frame, and the extractor only yields a name when the string + already contains ``/models/``. The rewriter qualifies it a few lines later for the upstream, so a + client that addressed the gateway the documented way, by alias, logged no model and therefore + resolved no cost-map entry. Resolving first is what puts the real name on the logging object. + """ + from litellm.proxy.pass_through_endpoints.llm_passthrough_endpoints import ( + _build_vertex_live_setup_model_rewriter, + ) + from litellm.proxy.pass_through_endpoints.pass_through_endpoints import ( + _extract_model_from_vertex_ai_setup, + _resolved_vertex_live_setup, + ) + + rewriter = _build_vertex_live_setup_model_rewriter( + vertex_project="proj-db", vertex_location="global", llm_router=None + ) + setup_data = {"model": setup_model} + + resolved = _extract_model_from_vertex_ai_setup(_resolved_vertex_live_setup(setup_data, rewriter)) + + assert resolved == "gemini-live-2.5-flash", "an unresolved setup model logs the session as 'unknown'" + + +@pytest.mark.asyncio +async def test_websocket_passthrough_logs_a_bare_alias_setup_model(): + """End to end through the relay: a bare alias must reach the logging object as a real model name. + + This is the call-site half of the fix. The helper tests above pass even if extraction moves back + before the rewrite, so this one drives the real websocket relay and asserts on what got logged, + which is the name the cost map is looked up by. An unbilled session logs ``unknown``. + """ + from litellm.proxy.pass_through_endpoints.llm_passthrough_endpoints import ( + _build_vertex_live_setup_model_rewriter, + ) + + upstream_ws = RecordingUpstreamWebSocket() + setup_frame = json.dumps({"setup": {"model": "gemini-live-2.5-flash"}}) + websocket = _client_websocket( + AsyncMock( + side_effect=[ + {"type": "websocket.receive", "text": setup_frame}, + {"type": "websocket.disconnect"}, + ] + ) + ) + built = [] + real_logging = litellm.litellm_core_utils.litellm_logging.Logging + + def _capture(*args, **kwargs): + obj = real_logging(*args, **kwargs) + built.append(obj) + return obj + + with _patched_websocket_passthrough_environment(upstream_ws): + with patch("litellm.litellm_core_utils.litellm_logging.Logging", side_effect=_capture): + await websocket_passthrough_request( + websocket=websocket, + target="wss://aiplatform.googleapis.com/ws/google.cloud.aiplatform.v1.LlmBidiService/BidiGenerateContent", + custom_headers={"Authorization": "Bearer token"}, + user_api_key_dict=UserAPIKeyAuth(), + forward_headers=False, + endpoint="/vertex_ai/live", + accept_websocket=False, + setup_model_rewriter=_build_vertex_live_setup_model_rewriter( + vertex_project="proj-db", vertex_location="global", llm_router=None + ), + ) + + assert built, "the relay should have built a logging object" + assert built[0].model == "gemini-live-2.5-flash", "a bare alias must not log as 'unknown'" + + +def test_vertex_live_setup_resolution_is_inert_without_a_rewriter(): + """Non-Live passthrough routes pass no rewriter, so the frame must be handed over untouched.""" + from litellm.proxy.pass_through_endpoints.pass_through_endpoints import ( + _extract_model_from_vertex_ai_setup, + _resolved_vertex_live_setup, + ) + + setup_data = {"model": "projects/p/locations/global/publishers/google/models/gemini-live-2.5-flash"} + + assert _resolved_vertex_live_setup(setup_data, None) is setup_data + assert _extract_model_from_vertex_ai_setup(_resolved_vertex_live_setup(setup_data, None)) == ( + "gemini-live-2.5-flash" + ) + + @pytest.mark.asyncio @pytest.mark.parametrize("rcvd_close", [None, "abnormal", "no_status"]) async def test_websocket_passthrough_does_not_relay_unsendable_upstream_close(rcvd_close):