import pytest
from fastapi import Depends, FastAPI, HTTPException
from fastapi.exceptions import RequestValidationError
from fastapi.testclient import TestClient
from starlette.responses import JSONResponse


def http_exception_handler(request, exception):
    return JSONResponse({"exception": "http-exception"})


def request_validation_exception_handler(request, exception):
    return JSONResponse({"exception": "request-validation"})

/// note | Detalles Técnicos

También podrías usar `from starlette.middleware.cors import CORSMiddleware`.

**FastAPI** proporciona varios middlewares en `fastapi.middleware` como una conveniencia para ti, el desarrollador. Pero la mayoría de los middlewares disponibles provienen directamente de Starlette.

from fastapi import APIRouter, FastAPI
from fastapi.testclient import TestClient
from inline_snapshot import snapshot
from pydantic import BaseModel, HttpUrl
from starlette.responses import JSONResponse


class CustomModel(BaseModel):
    a: int


app = FastAPI()

callback_router = APIRouter(default_response_class=JSONResponse)


@callback_router.get(
    "{$callback_url}/callback/", responses={400: {"model": CustomModel}}
)

{* ../../docs_src/first_steps/tutorial001.py h1[1] *}

`FastAPI` 是一個 Python 類別，提供所有 API 的全部功能。

/// note | Technical Details

`FastAPI` 是一個直接繼承自 `Starlette` 的類別。

你同樣可以透過 `FastAPI` 來使用 <a href="https://www.starlette.dev/" class="external-link" target="_blank">Starlette</a> 所有的功能。

///

### 第二步：建立一個 `FastAPI` 「實例」

{* ../../docs_src/first_steps/tutorial001.py h1[3] *}

這裡的 `app` 變數將會是 `FastAPI` 類別的「實例」。

{* ../../docs_src/first_steps/tutorial001.py hl[1] *}

`FastAPI`는 당신의 API를 위한 모든 기능을 제공하는 파이썬 클래스입니다.

/// note | 기술 세부사항

`FastAPI`는 `Starlette`를 직접 상속하는 클래스입니다.

`FastAPI`로 <a href="https://www.starlette.dev/" class="external-link" target="_blank">Starlette</a>의 모든 기능을 사용할 수 있습니다.

///

### 2 단계: `FastAPI` "인스턴스" 생성

{* ../../docs_src/first_steps/tutorial001.py hl[3] *}

            - body
            - background
            - raw_headers
            - render
            - init_headers
            - headers
            - set_cookie
            - delete_cookie

## Starlette Responses

::: fastapi.responses.FileResponse
    options:
        members:
            - chunk_size
            - charset
            - status_code
            - media_type
            - body

**Typer** is FastAPI's little sibling. And it's intended to be the **FastAPI of CLIs**. ⌨️ 🚀

## Requirements { #requirements }

FastAPI stands on the shoulders of giants:

* <a href="https://www.starlette.dev/" class="external-link" target="_blank">Starlette</a> for the web parts.
* <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> for the data parts.

## Installation { #installation }

Durante el desarrollo, también contribuí a <a href="https://www.starlette.dev/" class="external-link" target="_blank">**Starlette**</a>, el otro requisito clave.

## Desarrollo { #development }

Y esas dos cosas, `scope` y `receive`, son lo que se necesita para crear una nueva *Request instance*.

Para aprender más sobre el `Request`, revisa <a href="https://www.starlette.dev/requests/" class="external-link" target="_blank">la documentación de Starlette sobre Requests</a>.

///

La única cosa que la función devuelta por `GzipRequest.get_route_handler` hace diferente es convertir el `Request` en un `GzipRequest`.

During the development, I also contributed to <a href="https://www.starlette.dev/" class="external-link" target="_blank">**Starlette**</a>, the other key requirement.

## Development { #development }