따라서 섹션

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

이 실행됩니다.

---

해당 모듈(파일)을 가져오면 이런 일이 발생하지 않습니다

그래서 다음과 같은 다른 파일 `importer.py`가 있는 경우:

```Python
from myapp import app

# Some more code
```

이 경우 `myapp.py` 내부의 자동 변수 `__name__`에는 값이 `"__main__"`이 들어가지 않습니다.

따라서 다음 행

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

은 실행되지 않습니다.

{* ../../docs_src/advanced_middleware/tutorial001_py310.py hl[2,6] *}

## `TrustedHostMiddleware` { #trustedhostmiddleware }

HTTP Host Header saldırılarına karşı korunmak için, gelen tüm request'lerde `Host` header'ının doğru ayarlanmış olmasını zorunlu kılar.

{* ../../docs_src/advanced_middleware/tutorial002_py310.py hl[2,6:8] *}

Aşağıdaki argümanlar desteklenir:

* [X-Forwarded-Proto](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Proto)
* [X-Forwarded-Host](https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-Host)

///

### Enable Proxy Forwarded Headers { #enable-proxy-forwarded-headers }

```

</div>

alors la variable interne `__name__` de votre fichier, créée automatiquement par Python, aura pour valeur la chaîne de caractères `"__main__"`.

Ainsi, la section :

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

va s'exécuter.

---

Cela ne se produira pas si vous importez ce module (fichier).

Par exemple, si vous avez un autre fichier `importer.py` qui contient :

```Python

It provides an API at

```
http://localhost:8000/v1/agents/multivac
```

There's also a frontend at

```
http://localhost:8000
```

/// tip

Note that both have the same host.

///

Then using the frontend you can make the AI agent do things on your behalf.

Ele fornece uma API em

```
http://localhost:8000/v1/agents/multivac
```

Há também um frontend em

```
http://localhost:8000
```

/// tip | Dica

Observe que ambos têm o mesmo host.

///

Usando o frontend, você pode fazer o agente de IA executar ações em seu nome.

    /**
     * Checks if this tree handle uses SMB2 or later protocol
     * @return whether this tree handle uses SMB2+
     */
    boolean isSMB2();

    /**
     * Gets the remote host name for this tree connection
     * @return the remote host name
     */
    String getRemoteHostName();

    /**
     * Gets the tree type (share type such as disk, printer, pipe, etc.)
     * @return the tree type
     */

     * Constructs a NetBIOS session request packet.
     *
     * @param config the configuration to use for this packet
     * @param calledName the NetBIOS name of the called (destination) host
     * @param callingName the NetBIOS name of the calling (source) host
     */
    public SessionRequestPacket(final Configuration config, final NetbiosName calledName, final NetbiosName callingName) {
        this.type = SESSION_REQUEST;

var DB *gorm.DB
var (
	mysqlDSN     = "gorm:gorm@tcp(localhost:9910)/gorm?charset=utf8&parseTime=True&loc=Local"
	postgresDSN  = "user=gorm password=gorm dbname=gorm host=localhost port=9920 sslmode=disable TimeZone=Asia/Shanghai"
	gaussdbDSN   = "user=gaussdb password=Gaussdb@123 dbname=gorm host=localhost port=9950 sslmode=disable TimeZone=Asia/Shanghai"
	sqlserverDSN = "sqlserver://sa:LoremIpsum86@localhost:9930?database=master"

from fastapi import FastAPI, Header
from pydantic import BaseModel

app = FastAPI()


class CommonHeaders(BaseModel):
    model_config = {"extra": "forbid"}

    host: str
    save_data: bool
    if_modified_since: str | None = None
    traceparent: str | None = None
    x_tag: list[str] = []


@app.get("/items/")
async def read_items(headers: CommonHeaders = Header()):