Durch Setzen von `--proxy-headers` kann FastAPI jetzt an den richtigen Ort umleiten. 😎

```
https://mysuperapp.com/items/
```

/// tip | Tipp

Wenn Sie mehr über HTTPS erfahren möchten, lesen Sie den Leitfaden [Über HTTPS](../deployment/https.md){.internal-link target=_blank}.

///

/// tip | Dica

No próximo capítulo, você verá uma implementação realmente segura, com hash de senha e tokens <abbr title="JSON Web Tokens">JWT</abbr>.

Mas, por enquanto, vamos nos concentrar nos detalhes específicos de que precisamos.

///

{* ../../docs_src/security/tutorial003_an_py310.py hl[87] *}

/// tip | Dica

/// tip | Tipp

Der „PATCH“ ist die letzte Zahl, zum Beispiel ist in `0.2.3` die PATCH-Version `3`.

///

Sie sollten also in der Lage sein, eine Version wie folgt anzupinnen:

```txt
fastapi>=0.45.0,<0.46.0
```

Nicht abwärtskompatible Änderungen und neue Funktionen werden in „MINOR“-Versionen hinzugefügt.

/// tip | Tipp

/// tip | Dica

O "PATCH" é o último número, por exemplo, em `0.2.3`, a versão PATCH é `3`.

///

Logo, você deveria conseguir fixar a versão, como:

```txt
fastapi>=0.45.0,<0.46.0
```

Mudanças significativas e novas funcionalidades são adicionadas em versões "MINOR".

/// tip | Dica

        -H "Content-Type: application/json" \
        "https://api.github.com/repos/gradle/gradle$endpoint" \
        -d "$data" \
        -w "\n%{http_code}" \
        2>/dev/null)

    local http_code=$(echo "$response" | tail -n1)
    local body=$(echo "$response" | head -n -1)

    if [[ "$http_code" -ge 400 ]]; then
        printf "Error: HTTP %s - %s\n" "$http_code" "$body" >&2
        exit 1
    fi

    echo "$body"
}

Sie können normale FastAPI-*Pfadoperationen* mit GraphQL in derselben Anwendung kombinieren.

/// tip | Tipp

**GraphQL** löst einige sehr spezifische Anwendungsfälle.

Es hat **Vorteile** und **Nachteile** im Vergleich zu gängigen **Web-APIs**.

```Python hl_lines="1"
async def needy_dependency(fresh_value: Annotated[str, Depends(get_value, use_cache=False)]):
    return {"fresh_value": fresh_value}
```

////

//// tab | Python 3.9+ nicht annotiert

/// tip | Tipp

Bevorzugen Sie die `Annotated`-Version, falls möglich.

///

```Python hl_lines="1"
async def needy_dependency(fresh_value: str = Depends(get_value, use_cache=False)):
    return {"fresh_value": fresh_value}

    }
}
```

/// tip | Consejo

Observa el server auto-generado con un valor `url` de `/api/v1`, tomado del `root_path`.

///

En la UI de los docs en <a href="http://127.0.0.1:9999/api/v1/docs" class="external-link" target="_blank">http://127.0.0.1:9999/api/v1/docs</a> se vería como:

<img src="/img/tutorial/behind-a-proxy/image03.png">

/// tip | Consejo

/// tip | Consejo

# Environment Variables { #environment-variables }

/// tip

If you already know what "environment variables" are and how to use them, feel free to skip this.

///

An environment variable (also known as "**env var**") is a variable that lives **outside** of the Python code, in the **operating system**, and could be read by your Python code (or by other programs as well).