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<?phpnamespace GuzzleHttp\Handler;
 
 use GuzzleHttp\RequestOptions;
 use Psr\Http\Message\RequestInterface;
 
 /**
 * Provides basic proxies for handlers.
 */
 class Proxy
 {
 /**
 * Sends synchronous requests to a specific handler while sending all other
 * requests to another handler.
 *
 * @param callable $default Handler used for normal responses
 * @param callable $sync    Handler used for synchronous responses.
 *
 * @return callable Returns the composed handler.
 */
 public static function wrapSync(
 callable $default,
 callable $sync
 ) {
 return function (RequestInterface $request, array $options) use ($default, $sync) {
 return empty($options[RequestOptions::SYNCHRONOUS])
 ? $default($request, $options)
 : $sync($request, $options);
 };
 }
 
 /**
 * Sends streaming requests to a streaming compatible handler while sending
 * all other requests to a default handler.
 *
 * This, for example, could be useful for taking advantage of the
 * performance benefits of curl while still supporting true streaming
 * through the StreamHandler.
 *
 * @param callable $default   Handler used for non-streaming responses
 * @param callable $streaming Handler used for streaming responses
 *
 * @return callable Returns the composed handler.
 */
 public static function wrapStreaming(
 callable $default,
 callable $streaming
 ) {
 return function (RequestInterface $request, array $options) use ($default, $streaming) {
 return empty($options['stream'])
 ? $default($request, $options)
 : $streaming($request, $options);
 };
 }
 }
 
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