1<?php
2
3namespace GuzzleHttp\Handler;
4
5use GuzzleHttp\Promise\PromiseInterface;
6use GuzzleHttp\RequestOptions;
7use Psr\Http\Message\RequestInterface;
8
9/**
10 * Provides basic proxies for handlers.
11 *
12 * @final
13 */
14class 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}
52