</div>

`fastapi` 命令列程式就是 **FastAPI CLI**。

FastAPI CLI 接收你的 Python 程式路徑（例如 `main.py`），並自動檢測 FastAPI 實例（通常命名為 `app`），確定正確的引入模組流程，然後運行該應用程式。

在生產環境，你應該使用 `fastapi run` 命令。 🚀

**FastAPI CLI** 內部使用了 <a href="https://www.uvicorn.dev" class="external-link" target="_blank">Uvicorn</a>，這是一個高效能、適合生產環境的 ASGI 伺服器。 😎

## `fastapi dev`

執行 `fastapi dev` 會啟動開發模式。

/// tip | 豆知識

<a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">'X-'プレフィックスを使用</a>してカスタムの独自ヘッダーを追加できます。

ただし、ブラウザのクライアントに表示させたいカスタムヘッダーがある場合は、<a href="https://www.starlette.dev/middleware/#corsmiddleware" class="external-link" target="_blank">StarletteのCORSドキュメント</a>に記載されているパラメータ `expose_headers` を使用して、それらをCORS設定に追加する必要があります ([CORS (オリジン間リソース共有)](cors.md){.internal-link target=_blank})

///

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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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  <!-- do_not_remove: published-with-gradle-metadata -->
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>com.google.guava</groupId>
    <artifactId>guava-parent</artifactId>

 * Copyright (C) 2012 The Guava Authors
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