/usr/share/php/GuzzleHttp/RetryMiddleware.php is in php-guzzlehttp 6.1.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | <?php
namespace GuzzleHttp;
use GuzzleHttp\Promise\PromiseInterface;
use GuzzleHttp\Promise\RejectedPromise;
use GuzzleHttp\Psr7;
use Psr\Http\Message\RequestInterface;
/**
* Middleware that retries requests based on the boolean result of
* invoking the provided "decider" function.
*/
class RetryMiddleware
{
/** @var callable */
private $nextHandler;
/** @var callable */
private $decider;
/**
* @param callable $decider Function that accepts the number of retries,
* a request, [response], and [exception] and
* returns true if the request is to be
* retried.
* @param callable $nextHandler Next handler to invoke.
* @param callable $delay Function that accepts the number of retries
* and returns the number of milliseconds to
* delay.
*/
public function __construct(
callable $decider,
callable $nextHandler,
callable $delay = null
) {
$this->decider = $decider;
$this->nextHandler = $nextHandler;
$this->delay = $delay ?: __CLASS__ . '::exponentialDelay';
}
/**
* Default exponential backoff delay function.
*
* @param $retries
*
* @return int
*/
public static function exponentialDelay($retries)
{
return (int) pow(2, $retries - 1);
}
/**
* @param RequestInterface $request
* @param array $options
*
* @return PromiseInterface
*/
public function __invoke(RequestInterface $request, array $options)
{
if (!isset($options['retries'])) {
$options['retries'] = 0;
}
$fn = $this->nextHandler;
return $fn($request, $options)
->then(
$this->onFulfilled($request, $options),
$this->onRejected($request, $options)
);
}
private function onFulfilled(RequestInterface $req, array $options)
{
return function ($value) use ($req, $options) {
if (!call_user_func(
$this->decider,
$options['retries'],
$req,
$value,
null
)) {
return $value;
}
return $this->doRetry($req, $options);
};
}
private function onRejected(RequestInterface $req, array $options)
{
return function ($reason) use ($req, $options) {
if (!call_user_func(
$this->decider,
$options['retries'],
$req,
null,
$reason
)) {
return new RejectedPromise($reason);
}
return $this->doRetry($req, $options);
};
}
private function doRetry(RequestInterface $request, array $options)
{
$options['delay'] = call_user_func($this->delay, ++$options['retries']);
return $this($request, $options);
}
}
|