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FastAPIについて ~エンドポイントエラーハンドリング~

Last updated at Posted at 2020-09-07

FastAPIエラーハンドリングサンプル

FastAPI version_0.61.1
Documentation: https://fastapi.tiangolo.com
Source Code: https://github.com/tiangolo/fastapi

FastAPIのエンドポイントは下記のように実装することで
エラーハンドリング可能になる。

sample.py
from fastapi import routing
def handle_wrapper(func):
    def routing_wrapper(*args, **kwargs):
        routing_api = func(*args, **kwargs)
        async def api_handle(request: Request) -> Response:
            try:
                http_response = await routing_api(request)
            except Exception as ex:
                """ここに任意の例外処理を記述する"""
            return http_response
        return api_handle
    return routing_wrapper
routing.get_request_handler = handle_wrapper(routing.get_request_handler)
http_response = await routing_api(request)

このコードの7行目↑にてエンドポイントが呼び出されるため、
上記コードを応用してコールバック関数を定義することも可能となる。

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