fix(stale): remove tracing.py stale code

llama_stack/core/server/tracing.py

@@ -1,80 +0,0 @@
-# Copyright (c) Meta Platforms, Inc. and affiliates.
-# All rights reserved.
-#
-# This source code is licensed under the terms described in the LICENSE file in
-# the root directory of this source tree.
-from aiohttp import hdrs
-
-from llama_stack.core.external import ExternalApiSpec
-from llama_stack.core.server.routes import find_matching_route, initialize_route_impls
-from llama_stack.log import get_logger
-from llama_stack.providers.utils.telemetry.tracing import end_trace, start_trace
-
-logger = get_logger(name=__name__, category="core::server")
-
-
-class TracingMiddleware:
-    def __init__(self, app, impls, external_apis: dict[str, ExternalApiSpec]):
-        self.app = app
-        self.impls = impls
-        self.external_apis = external_apis
-        # FastAPI built-in paths that should bypass custom routing
-        self.fastapi_paths = ("/docs", "/redoc", "/openapi.json", "/favicon.ico", "/static")
-
-    async def __call__(self, scope, receive, send):
-        if scope.get("type") == "lifespan":
-            return await self.app(scope, receive, send)
-
-        path = scope.get("path", "")
-
-        # Check if the path is a FastAPI built-in path
-        if path.startswith(self.fastapi_paths):
-            # Pass through to FastAPI's built-in handlers
-            logger.debug(f"Bypassing custom routing for FastAPI built-in path: {path}")
-            return await self.app(scope, receive, send)
-
-        if not hasattr(self, "route_impls"):
-            self.route_impls = initialize_route_impls(self.impls, self.external_apis)
-
-        try:
-            _, _, route_path, webmethod = find_matching_route(
-                scope.get("method", hdrs.METH_GET), path, self.route_impls
-            )
-        except ValueError:
-            # If no matching endpoint is found, pass through to FastAPI
-            logger.debug(f"No matching route found for path: {path}, falling back to FastAPI")
-            return await self.app(scope, receive, send)
-
-        # Log deprecation warning if route is deprecated
-        if getattr(webmethod, "deprecated", False):
-            logger.warning(
-                f"DEPRECATED ROUTE USED: {scope.get('method', 'GET')} {path} - "
-                f"This route is deprecated and may be removed in a future version. "
-                f"Please check the docs for the supported version."
-            )
-
-        trace_attributes = {"__location__": "server", "raw_path": path}
-
-        # Extract W3C trace context headers and store as trace attributes
-        headers = dict(scope.get("headers", []))
-        traceparent = headers.get(b"traceparent", b"").decode()
-        if traceparent:
-            trace_attributes["traceparent"] = traceparent
-        tracestate = headers.get(b"tracestate", b"").decode()
-        if tracestate:
-            trace_attributes["tracestate"] = tracestate
-
-        trace_path = webmethod.descriptive_name or route_path
-        trace_context = await start_trace(trace_path, trace_attributes)
-
-        async def send_with_trace_id(message):
-            if message["type"] == "http.response.start":
-                headers = message.get("headers", [])
-                headers.append([b"x-trace-id", str(trace_context.trace_id).encode()])
-                message["headers"] = headers
-            await send(message)
-
-        try:
-            return await self.app(scope, receive, send_with_trace_id)
-        finally:
-            await end_trace()