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<?php
namespace GuzzleHttp\Ring\Client;
use GuzzleHttp\Ring\Future\CompletedFutureArray;
use GuzzleHttp\Ring\Core;
/**
* HTTP handler that uses cURL easy handles as a transport layer.
*
* Requires PHP 5.5+
*
* When using the CurlHandler, custom curl options can be specified as an
* associative array of curl option constants mapping to values in the
* **curl** key of the "client" key of the request.
*/
class CurlHandler
{
/** @var callable */
private $factory;
/** @var array Array of curl easy handles */
private $handles = [];
/** @var array Array of owned curl easy handles */
private $ownedHandles = [];
/** @var int Total number of idle handles to keep in cache */
private $maxHandles;
/**
* Accepts an associative array of options:
*
* - factory: Optional callable factory used to create cURL handles.
* The callable is passed a request hash when invoked, and returns an
* array of the curl handle, headers resource, and body resource.
* - max_handles: Maximum number of idle handles (defaults to 5).
*
* @param array $options Array of options to use with the handler
*/
public function __construct(array $options = [])
{
$this->handles = $this->ownedHandles = [];
$this->factory = isset($options['handle_factory'])
? $options['handle_factory']
: new CurlFactory();
$this->maxHandles = isset($options['max_handles'])
? $options['max_handles']
: 5;
}
public function __destruct()
{
foreach ($this->handles as $handle) {
if (is_resource($handle)) {
curl_close($handle);
}
}
}
/**
* @param array $request
*
* @return CompletedFutureArray
*/
public function __invoke(array $request)
{
return new CompletedFutureArray(
$this->_invokeAsArray($request)
);
}
/**
* @internal
*
* @param array $request
*
* @return array
*/
public function _invokeAsArray(array $request)
{
$factory = $this->factory;
// Ensure headers are by reference. They're updated elsewhere.
$result = $factory($request, $this->checkoutEasyHandle());
$h = $result[0];
$hd =& $result[1];
$bd = $result[2];
Core::doSleep($request);
curl_exec($h);
$response = ['transfer_stats' => curl_getinfo($h)];
$response['curl']['error'] = curl_error($h);
$response['curl']['errno'] = curl_errno($h);
$response['transfer_stats'] = array_merge($response['transfer_stats'], $response['curl']);
$this->releaseEasyHandle($h);
return CurlFactory::createResponse([$this, '_invokeAsArray'], $request, $response, $hd, $bd);
}
private function checkoutEasyHandle()
{
// Find an unused handle in the cache
if (false !== ($key = array_search(false, $this->ownedHandles, true))) {
$this->ownedHandles[$key] = true;
return $this->handles[$key];
}
// Add a new handle
$handle = curl_init();
$id = (int) $handle;
$this->handles[$id] = $handle;
$this->ownedHandles[$id] = true;
return $handle;
}
private function releaseEasyHandle($handle)
{
$id = (int) $handle;
if (count($this->ownedHandles) > $this->maxHandles) {
curl_close($this->handles[$id]);
unset($this->handles[$id], $this->ownedHandles[$id]);
} else {
// curl_reset doesn't clear these out for some reason
static $unsetValues = [
CURLOPT_HEADERFUNCTION => null,
CURLOPT_WRITEFUNCTION => null,
CURLOPT_READFUNCTION => null,
CURLOPT_PROGRESSFUNCTION => null,
];
curl_setopt_array($handle, $unsetValues);
curl_reset($handle);
$this->ownedHandles[$id] = false;
}
}
}