## Language Detection and Selection

### User Interface Language

Fess determines the UI language in this order:

1. **Query parameter**: `?browser_lang=[locale]` (highest priority)
2. **Browser header**: `Accept-Language` header
3. **Fallback**: English (from `fess_label.properties` and `fess_message.properties`)

### Document Language Detection

During crawling and indexing, Fess:

# ========================================================================================
# Framework Default
# =================
# ----------------------------------------------------------
# Lasta Taglib
# ------------
errors.header = <ul class="has-error">
errors.footer = </ul>
errors.prefix = <li><i class="fa fa-exclamation-circle"></i>
errors.suffix = </li>
# ----------------------------------------------------------
# Javax Validator

        when(mockInfo.encode(any(byte[].class), anyInt())).thenReturn(20);
        when(mockInfo.size()).thenReturn(20);
        request.setInfo(mockInfo);

        // Set up header start for offset calculation
        try {
            Method getHeaderStartMethod = ServerMessageBlock2.class.getDeclaredMethod("getHeaderStart");
            getHeaderStartMethod.setAccessible(true);

    assertEquals(setOf(OkHttpTest::class.java.name), testHandler.calls.keys)
  }

  fun testCachedRequest() {
    enableTls()

    server.enqueue(MockResponse(body = "abc", headers = Headers.headersOf("cache-control", "public, max-age=3")))
    server.enqueue(MockResponse(body = "abc"))

    val ctxt = InstrumentationRegistry.getInstrumentation().targetContext.applicationContext

    page.get_by_role("button", name="GET /items/ Read Items").click()
    page.get_by_role("button", name="Try it out").click()
    # Manually add the screenshot
    page.screenshot(path="docs/en/docs/img/tutorial/header-param-models/image01.png")

    # ---------------------
    context.close()
    browser.close()


process = subprocess.Popen(
    ["fastapi", "run", "docs_src/header_param_models/tutorial001.py"]
)
try:

)
def get_client(request: pytest.FixtureRequest):
    mod = importlib.import_module(
        f"docs_src.path_operation_advanced_configuration.{request.param}"
    )

    client = TestClient(mod.app)
    client.headers.clear()
    return client


def test_query_params_str_validations(client: TestClient):
    response = client.post("/items/", json={"name": "Foo", "price": 42})
    assert response.status_code == 200, response.text

{* ../../docs_src/schema_extra_example/tutorial002_py310.py hl[2,8:11] *}

## `examples` в JSON Schema — OpenAPI { #examples-in-json-schema-openapi }

При использовании любой из функций:

* `Path()`
* `Query()`
* `Header()`
* `Cookie()`
* `Body()`
* `Form()`
* `File()`

вы также можете объявить набор `examples` с дополнительной информацией, которая будет добавлена в их **JSON Schema** внутри **OpenAPI**.

      ProtocolException::class.java,
      "Expected 'Sec-WebSocket-Accept' header value 'ujmZX4KXZqjwy6vi1aQFH5p4Ygk=' but was 'magic'",
    )
    webSocket.cancel()
  }

  @Test
  @Throws(IOException::class)
  fun clientIncludesForbiddenHeader() {
    newWebSocket(
      Request
        .Builder()
        .url(webServer.url("/"))
        .header("Sec-WebSocket-Extensions", "permessage-deflate")
        .build(),

Pero puedes devolver un `JSONResponse` directamente desde tus *path operations*.

Esto podría ser útil, por ejemplo, para devolver headers o cookies personalizados.

## Devolver una `Response` { #return-a-response }

De hecho, puedes devolver cualquier `Response` o cualquier subclase de ella.

/// tip | Consejo

	data := url.Values{}
	data.Set("grant_type", "client_credentials")
	req, err := http.NewRequest(http.MethodPost, idpEndpoint, strings.NewReader(data.Encode()))
	if err != nil {
		return nil, err
	}
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	req.SetBasicAuth(clientID, clientSecret)
	t := &http.Transport{
		TLSClientConfig: &tls.Config{
			InsecureSkipVerify: true,
		},
	}
	hclient := http.Client{