from typing import AsyncGenerator, ContextManager, TypeVar

import anyio
from anyio import CapacityLimiter
from starlette.concurrency import iterate_in_threadpool as iterate_in_threadpool  # noqa
from starlette.concurrency import run_in_threadpool as run_in_threadpool  # noqa
from starlette.concurrency import (  # noqa
    run_until_first_complete as run_until_first_complete,
)

_T = TypeVar("_T")

def test_get_starlette_item():
    response = client.get("/starlette-items/foo")
    assert response.status_code == 200, response.text
    assert response.json() == {"item": "The Foo Wrestlers"}


def test_get_starlette_item_not_found():
    response = client.get("/starlette-items/bar")
    assert response.status_code == 404, response.text
    assert response.headers.get("x-error") is None

```

/// note | "Technical Details"

You could also use `from starlette.responses import Response` or `from starlette.responses import JSONResponse`.

**FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette.

# WebSockets

When defining WebSockets, you normally declare a parameter of type `WebSocket` and with it you can read data from the client and send data to it.

It is provided directly by Starlette, but you can import it from `fastapi`:

```python
from fastapi import WebSocket
```

/// tip

    with_info_plain_validator_function,
)
from starlette.datastructures import URL as URL  # noqa: F401
from starlette.datastructures import Address as Address  # noqa: F401
from starlette.datastructures import FormData as FormData  # noqa: F401
from starlette.datastructures import Headers as Headers  # noqa: F401
from starlette.datastructures import QueryParams as QueryParams  # noqa: F401
from starlette.datastructures import State as State  # noqa: F401

```

/// note | "Technical Details"

You could also use `from starlette.requests import Request` and `from starlette.responses import JSONResponse`.

**FastAPI** provides the same `starlette.responses` as `fastapi.responses` just as a convenience for you, the developer. But most of the available responses come directly from Starlette. The same with `Request`.

///

## Override the default exception handlers

```Python hl_lines="2  6"
{!../../docs_src/static_files/tutorial001.py!}
```

/// note | "Teknik Detaylar"

Projenize dahil etmek için `from starlette.staticfiles import StaticFiles` kullanabilirsiniz.

**FastAPI**, geliştiricilere kolaylık sağlamak amacıyla `starlette.staticfiles`'ı `fastapi.staticfiles` olarak sağlar. Ancak `StaticFiles` sınıfı aslında doğrudan Starlette'den gelir.

///

### Bağlama (Mounting) Nedir?

from typing import Optional

from fastapi.openapi.models import OpenIdConnect as OpenIdConnectModel
from fastapi.security.base import SecurityBase
from starlette.exceptions import HTTPException
from starlette.requests import Request
from starlette.status import HTTP_403_FORBIDDEN
from typing_extensions import Annotated, Doc


class OpenIdConnect(SecurityBase):
    """
    OpenID Connect authentication class. An instance of it would be used as a

///

## Mais informações

Para aprender mais sobre as opções, verifique a documentação do Starlette para:

* <a href="https://www.starlette.io/websockets/" class="external-link" target="_blank">A classe `WebSocket`</a>.

Тепер APIStar — це набір інструментів для перевірки специфікацій OpenAPI, а не веб-фреймворк.

/// info | "Інформація"

APIStar створив Том Крісті. Той самий хлопець, який створив:

 * Django REST Framework
 * Starlette (на якому базується **FastAPI**)
 * Uvicorn (використовується Starlette і **FastAPI**)

///