* No entanto, existe uma solução para isso.
* Há uma extensão para o protocolo TLS (aquele que lida com a criptografia no nível TCP, antes do HTTP) chamado <a href="https://en.wikipedia.org/wiki/Server_Name_Indication" class="external-link" target="_blank"><abbr title="Server Name Indication">SNI</abbr></a>.
    * Esta extensão SNI permite que um único servidor (com um único endereço IP) tenha vários certificados HTTPS e atenda a vários domínios / aplicativos HTTPS.

Kopieren Sie dies in eine Datei `main.py`.

Starten Sie den Live-Server:

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

# First Steps

The simplest FastAPI file could look like this:

```Python
{!../../../docs_src/first_steps/tutorial001.py!}
```

Copy that to a file `main.py`.

Run the live server:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

You can add code to be run with the `request`,  before any *path operation* receives it.

And also after the `response` is generated, before returning it.

For example, you could add a custom header `X-Process-Time` containing the time in seconds that it took to process the request and generate a response:

```Python hl_lines="10  12-13"
{!../../../docs_src/middleware/tutorial001.py!}
```

## Other middlewares

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
<span style="color: green;">INFO</span>:     Started reloader process [28720]
<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

That's why the current versions are still `0.x.x`, this reflects that each version could potentially have breaking changes. This follows the <a href="https://semver.org/" class="external-link" target="_blank">Semantic Versioning</a> conventions.

amélioré continuellement.

C'est pourquoi les versions actuelles sont toujours `0.x.x`, cela reflète que chaque version peut potentiellement
recevoir des changements non rétrocompatibles. Cela suit les conventions de <a href="https://semver.org/" class="external-link"
target="_blank">versionnage sémantique</a>.

# 🔃 FastAPI ⏬

**FastAPI** ⏪ ➖ ⚙️ 🏭 📚 🈸 & ⚙️. & 💯 💰 🚧 1️⃣0️⃣0️⃣ 💯. ✋️ 🚮 🛠️ 🚚 🔜.

🆕 ⚒ 🚮 🛎, 🐛 🔧 🛎, & 📟 🔁 📉.

👈 ⚫️❔ ⏮️ ⏬ `0.x.x`, 👉 🎨 👈 🔠 ⏬ 💪 ⚠ ✔️ 💔 🔀. 👉 ⏩ <a href="https://semver.org/" class="external-link" target="_blank">⚛ 🛠️</a> 🏛.

👆 💪 ✍ 🏭 🈸 ⏮️ **FastAPI** ▶️️ 🔜 (&amp; 👆 ✔️ 🎲 🔨 ⚫️ 🕰), 👆 ✔️ ⚒ 💭 👈 👆 ⚙️ ⏬ 👈 👷 ☑ ⏮️ 🎂 👆 📟.

## 📌 👆 `fastapi` ⏬