*  Fix: Include a backwards-compatible `OkHttp-Response-Source` header with
    `OkUrlFactory `responses.
 *  Fix: Don't include a default User-Agent header in requests made with the Call
    API. Requests made with OkUrlFactory will continue to have a default user
    agent.
 *  New: Guava-like API to create headers:

    ```java
    Headers headers = Headers.of(name1, value1, name2, value2, ...).
    ```

def test_read_nonexistent_item():
    response = client.get("/items/baz", headers={"X-Token": "coneofsilence"})
    assert response.status_code == 404
    assert response.json() == {"detail": "Item not found"}


def test_create_item():
    response = client.post(
        "/items/",
        headers={"X-Token": "coneofsilence"},

    multipartBody.writeTo(buffer)

    val multipartReader = MultipartReader(buffer, "foo")
    val onlyPart = multipartReader.nextPart()!!
    assertThat(onlyPart.headers).isEqualTo(
      headersOf(
        "header-name",
        "header-value",
        "Content-Type",
        "application/octet-stream",
      ),
    )
    val readBuff = Buffer()
    var byteCount = 0L
    while (true) {

### CORS-Preflight-Requests { #cors-preflight-requests }

Dies sind alle `OPTIONS`-Requests mit `Origin`- und `Access-Control-Request-Method`-Headern.

In diesem Fall wird die Middleware den eingehenden Request abfangen und mit entsprechenden CORS-Headern, und entweder einer `200`- oder `400`-<abbr title="Response – Antwort: Daten, die der Server zum anfragenden Client zurücksendet">Response</abbr> zu Informationszwecken antworten.

)
def test_hidden_header(path, headers, expected_status, expected_response):
    client = TestClient(app)
    response = client.get(path, headers=headers)
    assert response.status_code == expected_status
    assert response.json() == expected_response


def test_hidden_path():
    client = TestClient(app)
    response = client.get("/hidden_path/hidden_path")
    assert response.status_code == 200

//   - SSE-KMS
type Type interface {
	fmt.Stringer

	IsRequested(http.Header) bool
	IsEncrypted(map[string]string) bool
}

// IsRequested returns true and the SSE Type if the HTTP headers
// indicate that some form server-side encryption is requested.
//
// If no SSE headers are present then IsRequested returns false
// and no Type.
func IsRequested(h http.Header) (Type, bool) {
	switch {
	case S3.IsRequested(h):
		return S3, true

* `allow_headers` - Una lista de headers de request HTTP que deberían estar soportados para requests cross-origin. Por defecto es `[]`. Puedes usar `['*']` para permitir todos los headers. Los headers `Accept`, `Accept-Language`, `Content-Language` y `Content-Type` siempre están permitidos para [requests CORS simples](https://developer.mozilla.org/en-US/docs/Web/HT...

      length: Int,
    )

    /**
     * Create or update incoming headers, creating the corresponding streams if necessary. Frames
     * that trigger this are HEADERS and PUSH_PROMISE.
     *
     * @param inFinished true if the sender will not send further frames.
     * @param streamId the stream owning these headers.
     * @param associatedStreamId the stream that triggered the sender to create this stream.
     */

      System.out.println(response.request().header("Date"));
    }
  }

  static class CurrentDateInterceptor implements Interceptor {
    @Override public Response intercept(Chain chain) throws IOException {
      Request request = chain.request();
      Headers newHeaders = request.headers()
          .newBuilder()
          .add("Date", new Date())
          .build();

  }

  @Test
  fun emptyResponseHeaderNameFromCacheIsLenient() {
    val headers =
      Headers
        .Builder()
        .add("Cache-Control: max-age=120")
    addHeaderLenient(headers, ": A")
    server.enqueue(
      MockResponse
        .Builder()
        .headers(headers.build())
        .body("body")
        .build(),
    )
    val response = get(server.url("/"))