From c940ab71975c6d2fb9c99c2f036f956cfb838729 Mon Sep 17 00:00:00 2001
From: ollie-bell <56110893+ollie-bell@users.noreply.github.com>
Date: Mon, 9 Feb 2026 19:06:06 +0000
Subject: [PATCH] feat: support starlette 0.52.0+ generic Request

---
 fastapi/dependencies/utils.py |  3 ++-
 tests/test_router_events.py   | 38 +++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 1 deletion(-)

diff --git a/fastapi/dependencies/utils.py b/fastapi/dependencies/utils.py
index ab18ec2db..2de42b80a 100644
--- a/fastapi/dependencies/utils.py
+++ b/fastapi/dependencies/utils.py
@@ -329,6 +329,7 @@ def get_dependant(
 def add_non_field_param_to_dependency(
     *, param_name: str, type_annotation: Any, dependant: Dependant
 ) -> bool | None:
+    type_annotation = get_origin(type_annotation) or type_annotation
     if lenient_issubclass(type_annotation, Request):
         dependant.request_param_name = param_name
         return True
@@ -453,7 +454,7 @@ def analyze_param(
     # Only apply special handling when there's no explicit Depends - if there's a Depends,
     # the dependency will be called and its return value used instead of the special injection
     if depends is None and lenient_issubclass(
-        type_annotation,
+        get_origin(type_annotation) or type_annotation,
         (
             Request,
             WebSocket,
diff --git a/tests/test_router_events.py b/tests/test_router_events.py
index 7869a7afc..e93ae2502 100644
--- a/tests/test_router_events.py
+++ b/tests/test_router_events.py
@@ -1,10 +1,15 @@
 from collections.abc import AsyncGenerator
 from contextlib import asynccontextmanager
+from typing import TypedDict
 
 import pytest
 from fastapi import APIRouter, FastAPI, Request
 from fastapi.testclient import TestClient
 from pydantic import BaseModel
+from starlette import __version__ as STARLETTE_VERSION
+from typing_extensions import Self
+
+STARLETTE_MINOR_VERSION_TUPLE = tuple(int(x) for x in STARLETTE_VERSION.split(".")[:2])
 
 
 class State(BaseModel):
@@ -171,6 +176,39 @@ def test_router_nested_lifespan_state(state: State) -> None:
     assert state.sub_router_shutdown is True
 
 
+@pytest.mark.skipif(
+    STARLETTE_MINOR_VERSION_TUPLE < (0, 52),
+    reason="Starlette Request with generic type is not supported in Starlette < 0.52.0",
+)
+def test_router_generic_request_typed_dict_lifespan_state() -> None:
+    class MyClass:
+        async def __aenter__(self) -> Self:
+            return self
+
+        async def __aexit__(self, exc_type, exc_value, traceback) -> None:
+            pass
+
+    class MyState(TypedDict):
+        my_class: MyClass
+
+    @asynccontextmanager
+    async def lifespan(app: FastAPI) -> AsyncGenerator[MyState]:
+        async with MyClass() as my_class:
+            yield {"my_class": my_class}
+
+    app = FastAPI(lifespan=lifespan)
+
+    @app.get("/")
+    def main(request: Request[MyState]) -> dict[str, str]:
+        assert isinstance(request.state["my_class"], MyClass)
+        return {"message": "Hello World"}
+
+    with TestClient(app) as client:
+        response = client.get("/")
+        assert response.status_code == 200, response.text
+        assert response.json() == {"message": "Hello World"}
+
+
 def test_router_nested_lifespan_state_overriding_by_parent() -> None:
     @asynccontextmanager
     async def lifespan(