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<?php
namespace Illuminate\Queue\Middleware;
use Illuminate\Cache\RateLimiter;
use Illuminate\Cache\RateLimiting\Unlimited;
use Illuminate\Container\Container;
use Illuminate\Support\Arr;
class RateLimited
{
/**
* The rate limiter instance.
*
* @var \Illuminate\Cache\RateLimiter
*/
protected $limiter;
/**
* The name of the rate limiter.
*
* @var string
*/
protected $limiterName;
/**
* Indicates if the job should be released if the limit is exceeded.
*
* @var bool
*/
public $shouldRelease = true;
/**
* Create a new middleware instance.
*
* @param string $limiterName
* @return void
*/
public function __construct($limiterName)
{
$this->limiter = Container::getInstance()->make(RateLimiter::class);
$this->limiterName = $limiterName;
}
/**
* Process the job.
*
* @param mixed $job
* @param callable $next
* @return mixed
*/
public function handle($job, $next)
{
if (is_null($limiter = $this->limiter->limiter($this->limiterName))) {
return $next($job);
}
$limiterResponse = call_user_func($limiter, $job);
if ($limiterResponse instanceof Unlimited) {
return $next($job);
}
return $this->handleJob(
$job,
$next,
collect(Arr::wrap($limiterResponse))->map(function ($limit) {
return (object) [
'key' => md5($this->limiterName.$limit->key),
'maxAttempts' => $limit->maxAttempts,
'decayMinutes' => $limit->decayMinutes,
];
})->all()
);
}
/**
* Handle a rate limited job.
*
* @param mixed $job
* @param callable $next
* @param array $limits
* @return mixed
*/
protected function handleJob($job, $next, array $limits)
{
foreach ($limits as $limit) {
if ($this->limiter->tooManyAttempts($limit->key, $limit->maxAttempts)) {
return $this->shouldRelease
? $job->release($this->getTimeUntilNextRetry($limit->key))
: false;
}
$this->limiter->hit($limit->key, $limit->decayMinutes * 60);
}
return $next($job);
}
/**
* Do not release the job back to the queue if the limit is exceeded.
*
* @return $this
*/
public function dontRelease()
{
$this->shouldRelease = false;
return $this;
}
/**
* Get the number of seconds that should elapse before the job is retried.
*
* @param string $key
* @return int
*/
protected function getTimeUntilNextRetry($key)
{
return $this->limiter->availableIn($key) + 3;
}
/**
* Prepare the object for serialization.
*
* @return array
*/
public function __sleep()
{
return [
'limiterName',
'shouldRelease',
];
}
/**
* Prepare the object after unserialization.
*
* @return void
*/
public function __wakeup()
{
$this->limiter = Container::getInstance()->make(RateLimiter::class);
}
}