Viewing file:  CurlClientState.php (5.48 KB) -rw-r--r--
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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\Internal;
use Psr\Log\LoggerInterface;
use Symfony\Component\HttpClient\Response\CurlResponse;
/**
* Internal representation of the cURL client's state.
*
* @author Alexander M. Turek <me@derrabus.de>
*
* @internal
*/
final class CurlClientState extends ClientState
{
public ?\CurlMultiHandle $handle;
public ?\CurlShareHandle $share;
/** @var PushedResponse[] */
public array $pushedResponses = [];
public DnsCache $dnsCache;
/** @var float[] */
public array $pauseExpiries = [];
public int $execCounter = \PHP_INT_MIN;
public ?LoggerInterface $logger = null;
public static array $curlVersion;
public function __construct(int $maxHostConnections, int $maxPendingPushes)
{
self::$curlVersion ??= curl_version();
$this->handle = curl_multi_init();
$this->dnsCache = new DnsCache();
$this->reset();
// Don't enable HTTP/1.1 pipelining: it forces responses to be sent in order
if (\defined('CURLPIPE_MULTIPLEX')) {
curl_multi_setopt($this->handle, \CURLMOPT_PIPELINING, \CURLPIPE_MULTIPLEX);
}
if (\defined('CURLMOPT_MAX_HOST_CONNECTIONS')) {
$maxHostConnections = curl_multi_setopt($this->handle, \CURLMOPT_MAX_HOST_CONNECTIONS, 0 < $maxHostConnections ? $maxHostConnections : \PHP_INT_MAX) ? 0 : $maxHostConnections;
}
if (\defined('CURLMOPT_MAXCONNECTS') && 0 < $maxHostConnections) {
curl_multi_setopt($this->handle, \CURLMOPT_MAXCONNECTS, $maxHostConnections);
}
// Skip configuring HTTP/2 push when it's unsupported or buggy, see https://bugs.php.net/77535
if (0 >= $maxPendingPushes) {
return;
}
// HTTP/2 push crashes before curl 7.61
if (!\defined('CURLMOPT_PUSHFUNCTION') || 0x073D00 > self::$curlVersion['version_number'] || !(\CURL_VERSION_HTTP2 & self::$curlVersion['features'])) {
return;
}
// Clone to prevent a circular reference
$multi = clone $this;
$multi->handle = null;
$multi->share = null;
$multi->pushedResponses = &$this->pushedResponses;
$multi->logger = &$this->logger;
$multi->handlesActivity = &$this->handlesActivity;
$multi->openHandles = &$this->openHandles;
curl_multi_setopt($this->handle, \CURLMOPT_PUSHFUNCTION, static function ($parent, $pushed, array $requestHeaders) use ($multi, $maxPendingPushes) {
return $multi->handlePush($parent, $pushed, $requestHeaders, $maxPendingPushes);
});
}
public function reset()
{
foreach ($this->pushedResponses as $url => $response) {
$this->logger?->debug(sprintf('Unused pushed response: "%s"', $url));
curl_multi_remove_handle($this->handle, $response->handle);
curl_close($response->handle);
}
$this->pushedResponses = [];
$this->dnsCache->evictions = $this->dnsCache->evictions ?: $this->dnsCache->removals;
$this->dnsCache->removals = $this->dnsCache->hostnames = [];
$this->share = curl_share_init();
curl_share_setopt($this->share, \CURLSHOPT_SHARE, \CURL_LOCK_DATA_DNS);
curl_share_setopt($this->share, \CURLSHOPT_SHARE, \CURL_LOCK_DATA_SSL_SESSION);
if (\defined('CURL_LOCK_DATA_CONNECT') && \PHP_VERSION_ID >= 80000) {
curl_share_setopt($this->share, \CURLSHOPT_SHARE, \CURL_LOCK_DATA_CONNECT);
}
}
private function handlePush($parent, $pushed, array $requestHeaders, int $maxPendingPushes): int
{
$headers = [];
$origin = curl_getinfo($parent, \CURLINFO_EFFECTIVE_URL);
foreach ($requestHeaders as $h) {
if (false !== $i = strpos($h, ':', 1)) {
$headers[substr($h, 0, $i)][] = substr($h, 1 + $i);
}
}
if (!isset($headers[':method']) || !isset($headers[':scheme']) || !isset($headers[':authority']) || !isset($headers[':path'])) {
$this->logger?->debug(sprintf('Rejecting pushed response from "%s": pushed headers are invalid', $origin));
return \CURL_PUSH_DENY;
}
$url = $headers[':scheme'][0].'://'.$headers[':authority'][0];
// curl before 7.65 doesn't validate the pushed ":authority" header,
// but this is a MUST in the HTTP/2 RFC; let's restrict pushes to the original host,
// ignoring domains mentioned as alt-name in the certificate for now (same as curl).
if (!str_starts_with($origin, $url.'/')) {
$this->logger?->debug(sprintf('Rejecting pushed response from "%s": server is not authoritative for "%s"', $origin, $url));
return \CURL_PUSH_DENY;
}
if ($maxPendingPushes <= \count($this->pushedResponses)) {
$fifoUrl = key($this->pushedResponses);
unset($this->pushedResponses[$fifoUrl]);
$this->logger?->debug(sprintf('Evicting oldest pushed response: "%s"', $fifoUrl));
}
$url .= $headers[':path'][0];
$this->logger?->debug(sprintf('Queueing pushed response: "%s"', $url));
$this->pushedResponses[$url] = new PushedResponse(new CurlResponse($this, $pushed), $headers, $this->openHandles[(int) $parent][1] ?? [], $pushed);
return \CURL_PUSH_OK;
}
}
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