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<?php namespace GuzzleHttp\Handler; use GuzzleHttp\Promise\PromiseInterface; use GuzzleHttp\RequestOptions; use Psr\Http\Message\RequestInterface; /** * Provides basic proxies for handlers. * * @final */ class Proxy { /** * Sends synchronous requests to a specific handler while sending all other * requests to another handler. * * @param callable(RequestInterface, array): PromiseInterface $default Handler used for normal responses * @param callable(RequestInterface, array): PromiseInterface $sync Handler used for synchronous responses. * * @return callable(RequestInterface, array): PromiseInterface Returns the composed handler. */ public static function wrapSync(callable $default, callable $sync): callable { return static function (RequestInterface $request, array $options) use ($default, $sync): PromiseInterface { return empty($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(RequestInterface, array): PromiseInterface $default Handler used for non-streaming responses * @param callable(RequestInterface, array): PromiseInterface $streaming Handler used for streaming responses * * @return callable(RequestInterface, array): PromiseInterface Returns the composed handler. */ public static function wrapStreaming(callable $default, callable $streaming): callable { return static function (RequestInterface $request, array $options) use ($default, $streaming): PromiseInterface { return empty($options['stream']) ? $default($request, $options) : $streaming($request, $options); }; } /** * Sends requests to a fallback handler when the default cURL handler cannot * honor TLS 1.2 selection. * * @param callable(RequestInterface, array): PromiseInterface $default * @param callable(RequestInterface, array): PromiseInterface $fallback * * @return callable(RequestInterface, array): PromiseInterface Returns the composed handler. */ public static function wrapTlsFallback(callable $default, callable $fallback): callable { return static function (RequestInterface $request, array $options) use ($default, $fallback): PromiseInterface { if (self::requiresTls12Fallback($options)) { return $fallback($request, $options); } return $default($request, $options); }; } /** * @param array<string, mixed> $options */ private static function requiresTls12Fallback(array $options): bool { return isset($options[RequestOptions::CRYPTO_METHOD]) && $options[RequestOptions::CRYPTO_METHOD] === \STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT && !CurlVersion::supportsTls12(); } }
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