## Retrying Requests

Sometimes connections fail: either a pooled connection was stale and disconnected, or the webserver itself couldn’t be reached. OkHttp will retry the request with a different route if one is available.

* `allow_credentials` - Indicate that cookies should be supported for cross-origin requests. Defaults to `False`.

{* ../../docs_src/path_params_numeric_validations/tutorial001_an_py310.py hl[10] *}

/// note | Примітка

Параметр шляху завжди є обов’язковим, оскільки він має бути частиною шляху. Навіть якщо Ви оголосите його зі значенням `None` або встановите значення за замовчуванням — він все одно залишатиметься обов’язковим.

///

## Упорядковуйте параметри, як Вам потрібно

<a name="http2_naughty"></a>
#### ² HTTP/2 Cipher Suite Denylist

Cipher suites that are [discouraged for use][http2_denylist] with HTTP/2. OkHttp includes them because better suites are not commonly available. For example, none of the better cipher suites listed above shipped with Android 4.4 or Java 7.

[OkHttp30]: https://square.github.io/okhttp/changelog_3x/#version-300
[OkHttp310]: https://square.github.io/okhttp/changelog_3x/#version-310

   *
   * @throws IllegalArgumentException if the stream consists of two or more elements.
   * @throws NullPointerException if any element in the stream is {@code null}.
   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be
   *     {@code null}) and returns {@code Optional.empty()} if it has none.
   */
  @SuppressWarnings("unchecked")

   */
  @get:JvmName("proxy") val proxy: Proxy?,
  protocols: List<Protocol>,
  connectionSpecs: List<ConnectionSpec>,
  /**
   * Returns this address's proxy selector. Only used if the proxy is null. If none of this
   * selector's proxies are reachable, a direct connection will be attempted.
   */
  @get:JvmName("proxySelector") val proxySelector: ProxySelector,
) {
  /**

    RealConnectionPool(
      taskRunner = taskRunner,
      maxIdleConnections = maxIdleConnections,
      keepAliveDuration = 100L,
      timeUnit = TimeUnit.NANOSECONDS,
      connectionListener = ConnectionListener.NONE,
      exchangeFinderFactory = { pool, address, user ->
        FastFallbackExchangeFinder(
          routePlanner ?: RealRoutePlanner(
            taskRunner = taskRunner,
            connectionPool = pool,

    immutable = immutable,
    headerValue = headerValue,
  )
}

/**
 * Returns the next index in this at or after [startIndex] that is a character from
 * [characters]. Returns the input length if none of the requested characters can be found.
 */
private fun String.indexOfElement(
  characters: String,
  startIndex: Int = 0,
): Int {
  for (i in startIndex until length) {
    if (this[i] in characters) {

Wenn Sie jedoch eine benutzerdefinierte Response-Klasse mit `None` als Medientyp angegeben haben, verwendet FastAPI `application/json` für jede zusätzliche Response, die über ein zugehöriges Modell verfügt.

///

## Informationen kombinieren

Pero si has especificado una clase de response personalizada con `None` como su media type, FastAPI usará `application/json` para cualquier response adicional que tenga un modelo asociado.

///

## Combinando información