* PodSpecs containing parent directory references such as `..` (for example, `../bar`) in hostPath volume path or in volumeMount subpaths must be changed to the simple absolute path. Backsteps `..` are no longer allowed.([#47290](https://github.com/kubernetes/kubernetes/pull/47290), [@jhorwit2](https://github.com/jhorwit2)).


### API Machinery

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Example upgrade { #example-upgrade }

Now modify the file `main.py` to receive a body from a `PUT` request.

Declare the body using standard Python types, thanks to Pydantic.

```Python hl_lines="4  9-12  25-27"
from typing import Union

*  **🔢 🏷** 💪 💪 ✔️ 🔐.
*  **🔢 🏷** 🔜 🚫 ✔️ 🔐.
*  **💽 🏷** 🔜 🎲 💪 ✔️ #️⃣ 🔐.

/// danger

🙅 🏪 👩‍💻 🔢 🔐. 🕧 🏪 "🔐 #️⃣" 👈 👆 💪 ⤴️ ✔.

🚥 👆 🚫 💭, 👆 🔜 💡 ⚫️❔ "🔐#️⃣" [💂‍♂ 📃](security/simple-oauth2.md#_4){.internal-link target=_blank}.

///

## 💗 🏷

📥 🏢 💭 ❔ 🏷 💪 👀 💖 ⏮️ 👫 🔐 🏑 & 🥉 🌐❔ 👫 ⚙️:

{* ../../docs_src/extra_models/tutorial001.py hl[9,11,16,22,24,29:30,33:35,40:41] *}

<img src="/img/deployment/https/https05.drawio.svg">

### Response HTTP

La aplicación procesaría el request y enviaría un **response HTTP simple (sin encriptar)** al TLS Termination Proxy.

  stars: 1209
  owner_login: slackapi
  owner_html_url: https://github.com/slackapi
- name: bedrock-chat
  html_url: https://github.com/aws-samples/bedrock-chat
  stars: 1199
  owner_login: aws-samples
  owner_html_url: https://github.com/aws-samples
- name: fastapi_production_template
  html_url: https://github.com/zhanymkanov/fastapi_production_template
  stars: 1182
  owner_login: zhanymkanov

	}
	if err := scanner.Err(); err != nil {
		fmt.Fprintln(os.Stderr, "shouldn't see an error scanning a string")
	}
	// Output:
	// true
}

// Use a Scanner to implement a simple word-count utility by scanning the
// input as a sequence of space-delimited tokens.
func ExampleScanner_words() {
	// An artificial input source.

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

## Example upgrade { #example-upgrade }

Now modify the file `main.py` to receive a body from a `PUT` request.

Declare the body using standard Python types, thanks to Pydantic.

```Python hl_lines="4  9-12  25-27"
from typing import Union

Nunca almacenes contraseñas de usuarios en texto plano. Siempre almacena un "hash seguro" que puedas verificar luego.

Si no lo sabes, aprenderás qué es un "hash de contraseña" en los [capítulos de seguridad](security/simple-oauth2.md#password-hashing){.internal-link target=_blank}.

///

## Múltiples modelos

Aquí tienes una idea general de cómo podrían ser los modelos con sus campos de contraseña y los lugares donde se utilizan:

```Python
from unicorn import UnicornMiddleware

app = SomeASGIApp()

new_app = UnicornMiddleware(app, some_config="rainbow")
```

Pero FastAPI (en realidad Starlette) proporciona una forma más simple de hacerlo que asegura que los middlewares internos manejen errores del servidor y los controladores de excepciones personalizadas funcionen correctamente.

Para eso, usas `app.add_middleware()` (como en el ejemplo para CORS).

### Multiple Applications { #multiple-applications }

In the same server (or servers), there could be **multiple applications**, for example, other API programs or a database.

Only one process can be handling the specific IP and port (the TLS Termination Proxy in our example) but the other applications/processes can be running on the server(s) too, as long as they don't try to use the same **combination of public IP and port**.