quick fix 2

Lib/site-packages/aiohttp/client_middlewares.py

@@ -0,0 +1,55 @@
+"""Client middleware support."""
+
+from collections.abc import Awaitable, Callable, Sequence
+
+from .client_reqrep import ClientRequest, ClientResponse
+
+__all__ = ("ClientMiddlewareType", "ClientHandlerType", "build_client_middlewares")
+
+# Type alias for client request handlers - functions that process requests and return responses
+ClientHandlerType = Callable[[ClientRequest], Awaitable[ClientResponse]]
+
+# Type for client middleware - similar to server but uses ClientRequest/ClientResponse
+ClientMiddlewareType = Callable[
+    [ClientRequest, ClientHandlerType], Awaitable[ClientResponse]
+]
+
+
+def build_client_middlewares(
+    handler: ClientHandlerType,
+    middlewares: Sequence[ClientMiddlewareType],
+) -> ClientHandlerType:
+    """
+    Apply middlewares to request handler.
+
+    The middlewares are applied in reverse order, so the first middleware
+    in the list wraps all subsequent middlewares and the handler.
+
+    This implementation avoids using partial/update_wrapper to minimize overhead
+    and doesn't cache to avoid holding references to stateful middleware.
+    """
+    # Optimize for single middleware case
+    if len(middlewares) == 1:
+        middleware = middlewares[0]
+
+        async def single_middleware_handler(req: ClientRequest) -> ClientResponse:
+            return await middleware(req, handler)
+
+        return single_middleware_handler
+
+    # Build the chain for multiple middlewares
+    current_handler = handler
+
+    for middleware in reversed(middlewares):
+        # Create a new closure that captures the current state
+        def make_wrapper(
+            mw: ClientMiddlewareType, next_h: ClientHandlerType
+        ) -> ClientHandlerType:
+            async def wrapped(req: ClientRequest) -> ClientResponse:
+                return await mw(req, next_h)
+
+            return wrapped
+
+        current_handler = make_wrapper(middleware, current_handler)
+
+    return current_handler