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   1  <?php
   2  
   3  namespace GuzzleHttp\Handler;
   4  
   5  use GuzzleHttp\Promise\PromiseInterface;
   6  use GuzzleHttp\RequestOptions;
   7  use Psr\Http\Message\RequestInterface;
   8  
   9  /**
  10   * Provides basic proxies for handlers.
  11   *
  12   * @final
  13   */
  14  class Proxy
  15  {
  16      /**
  17       * Sends synchronous requests to a specific handler while sending all other
  18       * requests to another handler.
  19       *
  20       * @param callable(\Psr\Http\Message\RequestInterface, array): \GuzzleHttp\Promise\PromiseInterface $default Handler used for normal responses
  21       * @param callable(\Psr\Http\Message\RequestInterface, array): \GuzzleHttp\Promise\PromiseInterface $sync    Handler used for synchronous responses.
  22       *
  23       * @return callable(\Psr\Http\Message\RequestInterface, array): \GuzzleHttp\Promise\PromiseInterface Returns the composed handler.
  24       */
  25      public static function wrapSync(callable $default, callable $sync): callable
  26      {
  27          return static function (RequestInterface $request, array $options) use ($default, $sync): PromiseInterface {
  28              return empty($options[RequestOptions::SYNCHRONOUS]) ? $default($request, $options) : $sync($request, $options);
  29          };
  30      }
  31  
  32      /**
  33       * Sends streaming requests to a streaming compatible handler while sending
  34       * all other requests to a default handler.
  35       *
  36       * This, for example, could be useful for taking advantage of the
  37       * performance benefits of curl while still supporting true streaming
  38       * through the StreamHandler.
  39       *
  40       * @param callable(\Psr\Http\Message\RequestInterface, array): \GuzzleHttp\Promise\PromiseInterface $default   Handler used for non-streaming responses
  41       * @param callable(\Psr\Http\Message\RequestInterface, array): \GuzzleHttp\Promise\PromiseInterface $streaming Handler used for streaming responses
  42       *
  43       * @return callable(\Psr\Http\Message\RequestInterface, array): \GuzzleHttp\Promise\PromiseInterface Returns the composed handler.
  44       */
  45      public static function wrapStreaming(callable $default, callable $streaming): callable
  46      {
  47          return static function (RequestInterface $request, array $options) use ($default, $streaming): PromiseInterface {
  48              return empty($options['stream']) ? $default($request, $options) : $streaming($request, $options);
  49          };
  50      }
  51  }