Note over client: Response sent
    Note over dep_req: Run code after yield
    Note over dep_req: ✅ Dependency closed
```

## Dependencies with `yield`, `HTTPException`, `except` and Background Tasks { #dependencies-with-yield-httpexception-except-and-background-tasks }

Dependencies with `yield` have evolved over time to cover different use cases and fix some issues.

### Exemplos de ferramentas e estratégias de replicação { #examples-of-replication-tools-and-strategies }

Pode haver várias abordagens para conseguir isso, e falarei mais sobre estratégias específicas nos próximos capítulos, por exemplo, ao falar sobre Docker e contêineres.

from fastapi.types import DependencyCacheKey

if sys.version_info >= (3, 13):  # pragma: no cover
    from inspect import iscoroutinefunction
else:  # pragma: no cover
    from asyncio import iscoroutinefunction


def _unwrapped_call(call: Callable[..., Any] | None) -> Any:
    if call is None:
        return call  # pragma: no cover
    unwrapped = inspect.unwrap(_impartial(call))
    return unwrapped

        def endpoint(data: ParamModelV1):  # pragma: no cover
            return data


def test_raises_pydantic_v1_model_in_return_type() -> None:
    class ReturnModelV1(BaseModel):
        name: str

    app = FastAPI()

    with pytest.raises(PydanticV1NotSupportedError):

        @app.get("/return")
        def endpoint() -> ReturnModelV1:  # pragma: no cover
            return ReturnModelV1(name="test")

    ):
        app = FastAPI()

        class Item(BaseModel):
            title: str

        @app.get("/items/")
        def read_items(q: list[Item] = Query(default=None)):
            pass  # pragma: no cover


def test_invalid_tuple():
    with pytest.raises(
        AssertionError,
        match="Query parameter 'q' must be one of the supported types",
    ):
        app = FastAPI()

    Client->>Proxy: HTTPS Request<br/>Host: mysuperapp.com<br/>Path: /items

    Note over Proxy: Proxy adds forwarded headers

    Proxy->>Server: HTTP Request<br/>X-Forwarded-For: [client IP]<br/>X-Forwarded-Proto: https<br/>X-Forwarded-Host: mysuperapp.com<br/>Path: /items

    Note over Server: Server interprets headers<br/>(if --forwarded-allow-ips is set)

from fastapi import FastAPI
from fastapi.testclient import TestClient


def test_root_path_does_not_persist_across_requests():
    app = FastAPI()

    @app.get("/")
    def read_root():  # pragma: no cover
        return {"ok": True}

    # Attacker request with a spoofed root_path
    attacker_client = TestClient(app, root_path="/evil-api")
    response1 = attacker_client.get("/openapi.json")
    data1 = response1.json()

            .add("in", "the", "quick", "jumped", "over", "a")
            .build();
    assertThat(set).containsExactly("a", "in", "the", "over", "quick", "jumped").inOrder();
  }

  public void testExplicit_ordering_dupes() {
    SortedSet<String> set =
        ImmutableSortedSet.orderedBy(STRING_LENGTH)
            .add("in", "the", "quick", "brown", "fox", "jumped", "over", "a", "lazy", "dog")
            .build();

            .add("in", "the", "quick", "jumped", "over", "a")
            .build();
    assertThat(set).containsExactly("a", "in", "the", "over", "quick", "jumped").inOrder();
  }

  public void testExplicit_ordering_dupes() {
    SortedSet<String> set =
        ImmutableSortedSet.orderedBy(STRING_LENGTH)
            .add("in", "the", "quick", "brown", "fox", "jumped", "over", "a", "lazy", "dog")
            .build();

) -> TypeGuard[type[_T]]:
    try:
        return isinstance(cls, type) and issubclass(cls, class_or_tuple)  # type: ignore[arg-type]
    except TypeError:  # pragma: no cover
        if isinstance(cls, WithArgsTypes):
            return False
        raise  # pragma: no cover


def _annotation_is_sequence(annotation: type[Any] | None) -> bool:
    if lenient_issubclass(annotation, (str, bytes)):
        return False