from fastapi import FastAPI

from . import a, b

app = FastAPI()

app.include_router(a.router, prefix="/a")

from fastapi import APIRouter, Body

router = APIRouter()


@router.post("/compute")
def compute(a: int = Body(), b: str = Body()):

Although in FastAPI it's optional, and is used mainly to set headers, cookies, and alternative status codes.

///

### [Molten](https://moltenframework.com/) { #molten }

I discovered Molten in the first stages of building **FastAPI**. And it has quite similar ideas:

* Based on Python type hints.
* Validation and documentation from these types.
* Dependency Injection system.

     *
     * @param data the input data to expand
     * @param outlen the desired output length in bytes
     * @return the n-folded data of the specified length
     */
    public static byte[] expandNFold(byte[] data, int outlen) {
        int lcm = lcm(outlen, data.length);
        byte[] buf = new byte[outlen];
        int carry = 0;
        for (int i = lcm - 1; i >= 0; i--) {

	"testing"

	"github.com/minio/mux"
)

// Test cross domain xml handler.
func TestCrossXMLHandler(t *testing.T) {
	// Server initialization.
	router := mux.NewRouter().SkipClean(true).UseEncodedPath()
	handler := setCrossDomainPolicyMiddleware(router)
	srv := httptest.NewServer(handler)

	resp, err := http.Get(srv.URL + crossDomainXMLEntity)
	if err != nil {
		t.Fatal(err)
	}

    assert response.json() == {"foo": "baz"}


def test_nested_router():
    app = FastAPI()

    router = APIRouter(prefix="/nested")

    @router.get("/test")
    async def test(var: Annotated[str, Query()] = "bar"):
        return {"foo": var}

    app.include_router(router)

    client = TestClient(app)

    response = client.get("/nested/test")
    assert response.status_code == 200

///

### Agrega el router de callback { #add-the-callback-router }

En este punto tienes las *path operation(s)* del callback necesarias (las que el *desarrollador externo* debería implementar en la *API externa*) en el router de callback que creaste arriba.

    response = client_nested.post("/outer/strict/items/", json={"key": "value"})
    assert response.status_code == 200


def test_default_inner_accepts_json_content_type():
    response = client_nested.post("/outer/default/items/", json={"key": "value"})
    assert response.status_code == 200


# Strict app -> lax outer router -> strict inner router

app_mixed = FastAPI(strict_content_type=True)

Bien que dans FastAPI, il est facultatif, et est utilisé principalement pour définir les en-têtes, les cookies, et les codes de statut alternatifs.

///

### [Molten](https://moltenframework.com/) { #molten }

J'ai découvert Molten lors des premières étapes de développement de **FastAPI**. Et il a des idées assez similaires :

* Basé sur les annotations de type Python.
* Validation et documentation via ces types.

///

### 加入回呼 router { #add-the-callback-router }

此時你已經在先前建立的回呼 router 中，擁有所需的回呼「路徑操作（們）」（也就是「外部開發者」應該在「外部 API」中實作的那些）。

現在在「你的 API 的路徑操作裝飾器」中使用參數 `callbacks`，將該回呼 router 的屬性 `.routes`（實際上就是一個由路由／「路徑操作」所組成的 `list`）傳入：

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[33] *}

/// tip