By considering these concepts, you will be able to **evaluate and design** the best way to deploy **your own APIs**.

In the next chapters, I'll give you more **concrete recipes** to deploy FastAPI applications.

But for now, let's check these important **conceptual ideas**. These concepts also apply to any other type of web API. 💡

### Ṣẹ̀dá rẹ̀

* Ṣẹ̀dá fáìlì `main.py (èyí tíí ṣe, akọkọ.py)` pẹ̀lú:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

<details markdown="1">

    introduction to this new API.

 *  New: APIs to iterate and selectively clear the response cache.
 *  New: Support for SOCKS proxies.
 *  New: Support for `TLS_FALLBACK_SCSV`.
 *  New: Update HTTP/2 support to `h2-16` and `hpack-10`.
 *  New: APIs to prevent retrying non-idempotent requests.
 *  Fix: Drop NPN support. Going forward we support ALPN only.

```

///

*  `app` 📁 🔌 🌐. & ⚫️ ✔️ 🛁 📁 `app/__init__.py`, ⚫️ "🐍 📦" (🗃 "🐍 🕹"): `app`.
* ⚫️ 🔌 `app/main.py` 📁. ⚫️ 🔘 🐍 📦 (📁 ⏮️ 📁 `__init__.py`), ⚫️ "🕹" 👈 📦: `app.main`.
* 📤 `app/dependencies.py` 📁, 💖 `app/main.py`, ⚫️ "🕹": `app.dependencies`.
* 📤 📁 `app/routers/` ⏮️ ➕1️⃣ 📁 `__init__.py`, ⚫️ "🐍 📦": `app.routers`.
* 📁 `app/routers/items.py` 🔘 📦, `app/routers/`,, ⚫️ 🔁: `app.routers.items`.

</div>

## 範例

### 建立

- 建立一個 python 檔案 `main.py`，並寫入以下程式碼：

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

<details markdown="1">

And your users would be able to login from your Django app or from your **FastAPI** app, at the same time.

///

## Hash and verify the passwords { #hash-and-verify-the-passwords }

Import the tools we need from `passlib`.

If you want to use your APIs' function names as `operationId`s, you can iterate over all of them and override each *path operation's* `operation_id` using their `APIRoute.name`.

You should do it after adding all your *path operations*.

{* ../../docs_src/path_operation_advanced_configuration/tutorial002.py hl[2, 12:21, 24] *}

/// tip

If you manually call `app.openapi()`, you should update the `operationId`s before that.

& ⚫️ ⚙️ 🔘 🕐❔ 🗜 🎧-🈸.

## 🗳 ⏮️ 🎞 ➡ 🔡

✔️ 🗳 ⏮️ 🎞 ➡ 🔡, 👉 💼, ⛓ 👈 👆 💪 📣 ➡ `/app` 👆 📟, ✋️ ⤴️, 👆 🚮 🧽 🔛 🔝 (🗳) 👈 🔜 🚮 👆 **FastAPI** 🈸 🔽 ➡ 💖 `/api/v1`.

👉 💼, ⏮️ ➡ `/app` 🔜 🤙 🍦 `/api/v1/app`.

✋️ 🌐 👆 📟 ✍ 🤔 📤 `/app`.

& 🗳 🔜 **"❎"** **➡ 🔡** 🔛 ✈ ⏭ 📶 📨 Uvicorn, 🚧 👆 🈸 🤔 👈 ⚫️ 🍦 `/app`, 👈 👆 🚫 ✔️ ℹ 🌐 👆 📟 🔌 🔡 `/api/v1`.

🆙 📥, 🌐 🔜 👷 🛎.

      prefixes = ["/api/v1"]

  [http.routers]

    [http.routers.app-http]
      entryPoints = ["http"]
      service = "app"
      rule = "PathPrefix(`/api/v1`)"
      middlewares = ["api-stripprefix"]

  [http.services]

    [http.services.app]
      [http.services.app.loadBalancer]
        [[http.services.app.loadBalancer.servers]]
          url = "http://127.0.0.1:8000"
```

# (2)
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "80"]
```

1️⃣. 📁 `main.py` 📁 `/code` 📁 🔗 (🍵 🙆 `./app` 📁).

2️⃣. 🏃 Uvicorn & 💬 ⚫️ 🗄 `app` 🎚 ⚪️➡️ `main` (↩️ 🏭 ⚪️➡️ `app.main`).

⤴️ 🔆 Uvicorn 📋 ⚙️ 🆕 🕹 `main` ↩️ `app.main` 🗄 FastAPI 🎚 `app`.

## 🛠️ 🔧

➡️ 💬 🔄 🔃 🎏 [🛠️ 🔧](concepts.md){.internal-link target=_blank} ⚖ 📦.