und sie würde eine Response von dieser *externen API* mit einem JSON-Body wie dem folgenden erwarten:

```JSON
{
    "ok": true
}
```

/// tip | "Tipp"

Beachten Sie, dass die verwendete Callback-URL die URL enthält, die als Query-Parameter in `callback_url` (`https://www.external.org/events`) empfangen wurde, und auch die Rechnungs-`id` aus dem JSON-Body (`2expen51ve`).

///

### Den Callback-Router hinzufügen

package org.apache.maven.model.building;

import java.net.URL;

import org.apache.maven.building.UrlSource;

/**
 * Wraps an ordinary {@link URL} as a model source.
 *
 *
 * @deprecated instead use {@link UrlSource}
 */
@Deprecated
public class UrlModelSource extends UrlSource implements ModelSource {
    /**
     * Creates a new model source backed by the specified URL.
     *

client = TestClient(app)


def test_multi_query_values():
    url = "/items/?q=foo&q=bar"
    response = client.get(url)
    assert response.status_code == 200, response.text
    assert response.json() == {"q": ["foo", "bar"]}


def test_query_no_values():
    url = "/items/"
    response = client.get(url)
    assert response.status_code == 200, response.text
    assert response.json() == {"q": []}

    }

    public static String getFessUrl() {
        return System.getProperty("test.fess.url", DEFAULT_FESS_URL);
    }

    public static String getEsUrl() {
        return System.getProperty("test.search_engine.url", DEFAULT_SEARCH_ENGINE_URL);
    }

    protected static RequestSpecification checkMethodBase(final Map<String, Object> body) {

    assertThat(responseString).isEmpty()
  }

  private fun response(
    url: String,
    bodyHex: ByteString,
    fn: Response.Builder.() -> Unit = {},
  ): Response {
    return Response.Builder()
      .body(bodyHex.toResponseBody("text/plain".toMediaType()))
      .code(200)
      .message("OK")
      .request(Request.Builder().url(url).build())
      .protocol(Protocol.HTTP_2)
      .apply(fn)
      .build()

import okio.sink

internal fun Main.commonCreateRequest(): Request {
  val request = Request.Builder()

  val requestMethod = method ?: if (data != null) "POST" else "GET"

  val url = url ?: throw IOException("No url provided")

  request.url(url)

  data?.let {
    request.method(requestMethod, it.toRequestBody(mediaType()))
  }

  for (header in headers.orEmpty()) {
    val parts = header.split(':', limit = 2)

    }

    @Override public void callStart(Call call) {
      printEvent("callStart");
    }

    @Override public void proxySelectStart(Call call, HttpUrl url) {
      printEvent("proxySelectStart");
    }

    @Override public void proxySelectEnd(Call call, HttpUrl url, List<Proxy> proxies) {
      printEvent("proxySelectEnd");
    }

    @Override public void dnsStart(Call call, String domainName) {
      printEvent("dnsStart");

            duplicateHostList = new ArrayList<>();
        }
        duplicateHostList.add(duplicateHost);
    }

    public String convert(final String url) {
        if (duplicateHostList == null) {
            init();
        }

        String newUrl = url;
        for (final DuplicateHost duplicateHost : duplicateHostList) {
            newUrl = duplicateHost.convert(newUrl);
        }
        return newUrl;
    }

                        {
                            "required": True,
                            "schema": IsDict(
                                {
                                    "title": "Callback Url",
                                    "minLength": 1,
                                    "type": "string",
                                    "format": "uri",
                                }
                            )

pkg encoding, type TextAppender interface { AppendText } #62384
pkg encoding, type TextAppender interface, AppendText([]uint8) ([]uint8, error) #62384
pkg net/url, method (*URL) AppendBinary([]uint8) ([]uint8, error) #62384
pkg log/slog, method (Level) AppendText([]uint8) ([]uint8, error) #62384
pkg log/slog, method (*LevelVar) AppendText([]uint8) ([]uint8, error) #62384