74 lines
2.7 KiB
PHP
74 lines
2.7 KiB
PHP
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<?php
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/*
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* Copyright 2018 Google LLC
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google Inc. nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace Google\ApiCore\Middleware;
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use Google\ApiCore\Call;
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use GuzzleHttp\Promise\Promise;
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use GuzzleHttp\Promise\PromiseInterface;
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/**
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* Middleware which transforms $response into [$response, $metadata]
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*
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* @internal
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*/
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class ResponseMetadataMiddleware implements MiddlewareInterface
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{
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/** @var callable */
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private $nextHandler;
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/**
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* @param callable $nextHandler
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*/
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public function __construct(callable $nextHandler)
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{
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$this->nextHandler = $nextHandler;
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}
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public function __invoke(Call $call, array $options)
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{
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$metadataReceiver = new Promise();
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$options['metadataCallback'] = function ($metadata) use ($metadataReceiver) {
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$metadataReceiver->resolve($metadata);
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};
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$next = $this->nextHandler;
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return $next($call, $options)->then(
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function ($response) use ($metadataReceiver) {
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if ($metadataReceiver->getState() === PromiseInterface::FULFILLED) {
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return [$response, $metadataReceiver->wait()];
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} else {
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return [$response, []];
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}
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}
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);
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}
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}
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