from fastapi import FastAPI, HTTPException
from fastapi.exceptions import RequestValidationError
from fastapi.responses import PlainTextResponse
from starlette.exceptions import HTTPException as StarletteHTTPException

app = FastAPI()


@app.exception_handler(StarletteHTTPException)
async def http_exception_handler(request, exc):
    return PlainTextResponse(str(exc.detail), status_code=exc.status_code)

Geliştirme sırasında, diğer ana gereksinim olan <a href="https://www.starlette.dev/" class="external-link" target="_blank">**Starlette**</a>'e de katkıda bulundum.

## Geliştirme

**Typer**は FastAPI の弟分です。そして、**CLI 版 の FastAPI**を意味しています。

## 必要条件

FastAPI は巨人の肩の上に立っています。

- Web の部分は<a href="https://www.starlette.dev/" class="external-link" target="_blank">Starlette</a>
- データの部分は<a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a>

## インストール

<div class="termy">

```console
$ pip install fastapi

/// info | Информация

Вы можете прочитать больше про обработчики `lifespan` в Starlette в <a href="https://www.starlette.dev/lifespan/" class="external-link" target="_blank">документации Starlette по Lifespan</a>.

Включая то, как работать с состоянием lifespan, которое можно использовать в других частях вашего кода.

///

Bu işlem için, `TestClient`'ı bir `with` ifadesinde kullanarak WebSocket'e bağlanabilirsiniz:

{* ../../docs_src/app_testing/tutorial002.py hl[27:31] *}

/// note | Not

Daha fazla detay için Starlette'in <a href="https://www.starlette.dev/staticfiles/" class="external-link" target="_blank">Websockets'i Test Etmek</a> dokümantasyonunu inceleyin.

## Requisitos { #requirements }

FastAPI se apoya en hombros de gigantes:

* <a href="https://www.starlette.dev/" class="external-link" target="_blank">Starlette</a> para las partes web.
* <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> para las partes de datos.

## Instalación { #installation }

**Typer** é o irmão menor do FastAPI. E seu propósito é ser o **FastAPI das _CLIs_**. ⌨️ 🚀

## Requisitos { #requirements }

FastAPI está nos ombros de gigantes:

* <a href="https://www.starlette.dev/" class="external-link" target="_blank">Starlette</a> para as partes web.
* <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic</a> para a parte de dados.

## Instalação { #installation }

For this, you use the `TestClient` in a `with` statement, connecting to the WebSocket:

{* ../../docs_src/app_testing/tutorial002_py39.py hl[27:31] *}

/// note

For more details, check Starlette's documentation for <a href="https://www.starlette.dev/testclient/#testing-websocket-sessions" class="external-link" target="_blank">testing WebSockets</a>.

from fastapi import Depends, FastAPI
from fastapi.requests import HTTPConnection
from fastapi.testclient import TestClient
from starlette.websockets import WebSocket

app = FastAPI()
app.state.value = 42


async def extract_value_from_http_connection(conn: HTTPConnection):
    return conn.app.state.value


@app.get("/http")
async def get_value_by_http(value: int = Depends(extract_value_from_http_connection)):
    return value

Während der Entwicklung habe ich auch zu <a href="https://www.starlette.dev/" class="external-link" target="_blank">**Starlette**</a> beigetragen, der anderen Schlüsselanforderung.

## Entwicklung { #development }