// TODO trim(default)
        return "<field name=\"" + XmlUtil.escapeXml(name) + "\">" + buf.toString().trim() + "</field>\n";
    }

    /**
     * Returns the additional data for the response.
     * @param responseData The response data.
     * @param document The document.
     * @return The additional data.
     */
    protected String getAdditionalData(final ResponseData responseData, final Document document) {

    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {
                            "application/json": {



...
```

As part of the application object creation, a *path operation* for `/openapi.json` (or for whatever you set your `openapi_url`) is registered.

It just returns a JSON response with the result of the application's `.openapi()` method.

By default, what the method `.openapi()` does is check the property `.openapi_schema` to see if it has contents and return them.

Затем мы можем создать `AsyncClient` со ссылкой на приложение и посылать асинхронные запросы, используя `await`.

{* ../../docs_src/async_tests/test_main.py hl[9:12] *}

Это эквивалентно следующему:

```Python
response = client.get('/')
```

...которое мы использовали для отправки наших запросов с `TestClient`.

/// tip | Подсказка

Обратите внимание, что мы используем async/await с `AsyncClient` - запрос асинхронный.

///

     *
     * @param buf the buffer containing the transaction data
     * @param off the offset in the buffer
     * @param length the length of data to send
     * @param inB the buffer to receive the response
     * @param maxRecvCnt the maximum number of bytes to receive
     * @return len the number of bytes received
     * @throws IOException if an I/O error occurs
     */

# میان‌افزار - middleware

شما میتوانید میان‌افزارها را در **FastAPI** اضافه کنید.

"میان‌افزار" یک تابع است که با هر درخواست(request) قبل از پردازش توسط هر path operation (عملیات مسیر) خاص کار می‌کند. همچنین با هر پاسخ(response) قبل از بازگشت آن نیز کار می‌کند.

* هر **درخواستی (request)** که به برنامه شما می آید را می گیرد.
* سپس می تواند کاری برای آن **درخواست** انجام دهید یا هر کد مورد نیازتان را اجرا کنید.

    /**
     * Processes a result data object for web/file crawling.
     * Default implementation returns the target unchanged.
     *
     * @param target the result data to process
     * @param responseData the response data from crawling
     * @return the processed result data
     */
    public ResultData process(final ResultData target, final ResponseData responseData) {
        return target;
    }

    /**

    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {
                            "application/json": {



...
```

#### OpenAPI dùng để làm gì?

import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.dbflute.utflute.mocklet.MockletHttpServletRequest;
import org.lastaflute.web.response.next.HtmlNext;

public class VirtualHostHelperTest extends UnitFessTestCase {

    private VirtualHostHelper virtualHostHelper;

    @Override
    public void setUp() throws Exception {
        super.setUp();

  TF_DeviceList* response = new TF_DeviceList;
  if (session && session->session)
    status->status = session->session->ListDevices(&response->response);
  return response;
}

TF_DeviceList* TF_DeprecatedSessionListDevices(TF_DeprecatedSession* session,
                                               TF_Status* status) {
  TF_DeviceList* response = new TF_DeviceList;
  if (session && session->session)