return new Tuple3[] { new Tuple3<>("Host", "example.com", "site1"), new Tuple3<>("X-Forwarded-Host", "test.com", "site2") };
            }
        });

        MockletHttpServletRequest request = getMockRequest();

        // No matching host header
        String key = virtualHostHelper.getVirtualHostKey();
        assertEquals("", key);

        // Matching host header
        request.addHeader("Host", "example.com");

  }

  public void testSerialization() {
    SerializableTester.reserializeAndAssert(HostAndPort.fromParts("host", 80));
    SerializableTester.reserializeAndAssert(HostAndPort.fromString("host"));
    SerializableTester.reserializeAndAssert(HostAndPort.fromString("host:80"));
    SerializableTester.reserializeAndAssert(HostAndPort.fromString("[::1]:104"));

  }

  public void testSerialization() {
    SerializableTester.reserializeAndAssert(HostAndPort.fromParts("host", 80));
    SerializableTester.reserializeAndAssert(HostAndPort.fromString("host"));
    SerializableTester.reserializeAndAssert(HostAndPort.fromString("host:80"));
    SerializableTester.reserializeAndAssert(HostAndPort.fromString("[::1]:104"));

    val cookieA = HttpCookie("a", "android")
    cookieA.domain = serverUrl.host
    cookieA.path = "/"
    cookieManager.cookieStore.add(serverUrl.toUri(), cookieA)
    val cookieB = HttpCookie("b", "banana")
    cookieB.domain = serverUrl.host
    cookieB.path = "/"
    cookieManager.cookieStore.add(serverUrl.toUri(), cookieB)
    client =
      client

Garante que todas as requisições recebidas tenham um cabeçalho `Host` corretamente configurado, a fim de proteger contra ataques de cabeçalho de host HTTP.

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

Os seguintes argumentos são suportados:

Impone que todas las requests entrantes tengan correctamente configurado el header `Host`, para proteger contra ataques de HTTP Host Header.

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

Se soportan los siguientes argumentos:

        try {
            final URI uri = new URI(url);
            String host = uri.getHost();
            String path = uri.getPath();

            if (host == null || host.isEmpty()) {
                host = "_local";
            }

            if (path == null || path.isEmpty()) {
                path = "/" + formatter.getIndexFileName();

* [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)

///

### Proxy Forwarded Header'larını Etkinleştirme { #enable-proxy-forwarded-headers }

        final String result = indexExportJob.query(QueryBuilders.termQuery("host", "example.com")).execute();

        assertEquals("Exported 0 documents.", result);
    }

    // --- Edge cases ---

    @Test
    public void test_buildFilePath_emptyString() {
        // Empty string is a valid relative URI with null host and empty path

```

</div>

Python tarafından otomatik oluşturulan, dosyanızın içindeki `__name__` adlı dahili değişkenin değeri `"__main__"` string'i olur.

Dolayısıyla şu bölüm:

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

çalışır.

---

Ancak modülü (dosyayı) import ederseniz bu gerçekleşmez.

Yani örneğin `importer.py` adında başka bir dosyanız var ve içinde şunlar bulunuyorsa:

```Python