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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpClient;
use Symfony\Component\HttpClient\Response\MockResponse;
use Symfony\Component\HttpClient\Response\ResponseStream;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\HttpCache\HttpCache;
use Symfony\Component\HttpKernel\HttpCache\StoreInterface;
use Symfony\Component\HttpKernel\HttpClientKernel;
use Symfony\Contracts\HttpClient\HttpClientInterface;
use Symfony\Contracts\HttpClient\ResponseInterface;
use Symfony\Contracts\HttpClient\ResponseStreamInterface;
/**
* Adds caching on top of an HTTP client.
*
* The implementation buffers responses in memory and doesn't stream directly from the network.
* You can disable/enable this layer by setting option "no_cache" under "extra" to true/false.
* By default, caching is enabled unless the "buffer" option is set to false.
*
* @author Nicolas Grekas <p@tchwork.com>
*/
class CachingHttpClient implements HttpClientInterface
{
use HttpClientTrait;
private $client;
private $cache;
private $defaultOptions = self::OPTIONS_DEFAULTS;
public function __construct(HttpClientInterface $client, StoreInterface $store, array $defaultOptions = [])
{
if (!class_exists(HttpClientKernel::class)) {
throw new \LogicException(sprintf('Using "%s" requires that the HttpKernel component version 4.3 or higher is installed, try running "composer require symfony/http-kernel:^4.3".', __CLASS__));
}
$this->client = $client;
$kernel = new HttpClientKernel($client);
$this->cache = new HttpCache($kernel, $store, null, $defaultOptions);
unset($defaultOptions['debug']);
unset($defaultOptions['default_ttl']);
unset($defaultOptions['private_headers']);
unset($defaultOptions['allow_reload']);
unset($defaultOptions['allow_revalidate']);
unset($defaultOptions['stale_while_revalidate']);
unset($defaultOptions['stale_if_error']);
unset($defaultOptions['trace_level']);
unset($defaultOptions['trace_header']);
if ($defaultOptions) {
[, $this->defaultOptions] = self::prepareRequest(null, null, $defaultOptions, $this->defaultOptions);
}
}
/**
* {@inheritdoc}
*/
public function request(string $method, string $url, array $options = []): ResponseInterface
{
[$url, $options] = $this->prepareRequest($method, $url, $options, $this->defaultOptions, true);
$url = implode('', $url);
if (!empty($options['body']) || !empty($options['extra']['no_cache']) || !\in_array($method, ['GET', 'HEAD', 'OPTIONS'])) {
return $this->client->request($method, $url, $options);
}
$request = Request::create($url, $method);
$request->attributes->set('http_client_options', $options);
foreach ($options['normalized_headers'] as $name => $values) {
if ('cookie' !== $name) {
foreach ($values as $value) {
$request->headers->set($name, substr($value, 2 + \strlen($name)), false);
}
continue;
}
foreach ($values as $cookies) {
foreach (explode('; ', substr($cookies, \strlen('Cookie: '))) as $cookie) {
if ('' !== $cookie) {
$cookie = explode('=', $cookie, 2);
$request->cookies->set($cookie[0], $cookie[1] ?? '');
}
}
}
}
$response = $this->cache->handle($request);
$response = new MockResponse($response->getContent(), [
'http_code' => $response->getStatusCode(),
'response_headers' => $response->headers->allPreserveCase(),
]);
return MockResponse::fromRequest($method, $url, $options, $response);
}
/**
* {@inheritdoc}
*/
public function stream($responses, float $timeout = null): ResponseStreamInterface
{
if ($responses instanceof ResponseInterface) {
$responses = [$responses];
} elseif (!is_iterable($responses)) {
throw new \TypeError(sprintf('"%s()" expects parameter 1 to be an iterable of ResponseInterface objects, "%s" given.', __METHOD__, get_debug_type($responses)));
}
$mockResponses = [];
$clientResponses = [];
foreach ($responses as $response) {
if ($response instanceof MockResponse) {
$mockResponses[] = $response;
} else {
$clientResponses[] = $response;
}
}
if (!$mockResponses) {
return $this->client->stream($clientResponses, $timeout);
}
if (!$clientResponses) {
return new ResponseStream(MockResponse::stream($mockResponses, $timeout));
}
return new ResponseStream((function () use ($mockResponses, $clientResponses, $timeout) {
yield from MockResponse::stream($mockResponses, $timeout);
yield $this->client->stream($clientResponses, $timeout);
})());
}
}