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<?php |
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namespace Autumn\Api\Classes; |
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use Carbon\Carbon; |
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use Illuminate\Contracts\Cache\Repository as Cache; |
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class RateLimiter |
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{ |
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/** |
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* The cache store implementation. |
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* |
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* @var \Illuminate\Contracts\Cache\Repository |
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*/ |
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protected $cache; |
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/** |
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* Create a new rate limiter instance. |
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* |
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* @param \Illuminate\Contracts\Cache\Repository $cache |
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* |
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* @return void |
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*/ |
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public function __construct(Cache $cache) |
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{ |
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$this->cache = $cache; |
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} |
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/** |
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* Determine if the given key has been "accessed" too many times. |
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* |
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* @param string $key |
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* @param int $maxAttempts |
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* @param float|int $decayMinutes |
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* |
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* @return bool |
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*/ |
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public function tooManyAttempts($key, $maxAttempts, $decayMinutes = 1) |
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{ |
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if ($this->cache->has($key.':lockout')) { |
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return true; |
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} |
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if ($this->attempts($key) > $maxAttempts) { |
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$this->lockout($key, $decayMinutes); |
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$this->resetAttempts($key); |
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return true; |
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} |
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return false; |
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} |
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/** |
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* Add the lockout key to the cache. |
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* |
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* @param string $key |
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* @param int $decayMinutes |
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* |
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* @return void |
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*/ |
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protected function lockout($key, $decayMinutes) |
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{ |
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$this->cache->add( |
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$key.':lockout', Carbon::now()->getTimestamp() + ($decayMinutes * 60), $decayMinutes |
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); |
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} |
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/** |
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* Increment the counter for a given key for a given decay time. |
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* |
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* @param string $key |
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* @param float|int $decayMinutes |
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* |
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* @return int |
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*/ |
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public function hit($key, $decayMinutes = 1) |
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{ |
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$this->cache->add($key, 1, $decayMinutes); |
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return (int) $this->cache->increment($key); |
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} |
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/** |
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* Get the number of attempts for the given key. |
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* |
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* @param string $key |
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* |
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* @return mixed |
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*/ |
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public function attempts($key) |
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{ |
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return $this->cache->get($key, 0); |
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} |
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/** |
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* Reset the number of attempts for the given key. |
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* |
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* @param string $key |
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* |
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* @return mixed |
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*/ |
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public function resetAttempts($key) |
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{ |
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return $this->cache->forget($key); |
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} |
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/** |
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* Get the number of retries left for the given key. |
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* |
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* @param string $key |
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* @param int $maxAttempts |
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* |
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* @return int |
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*/ |
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public function retriesLeft($key, $maxAttempts) |
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{ |
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$attempts = $this->attempts($key); |
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return $attempts === 0 ? $maxAttempts : $maxAttempts - $attempts + 1; |
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} |
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/** |
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* Clear the hits and lockout for the given key. |
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* |
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* @param string $key |
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* |
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* @return void |
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*/ |
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public function clear($key) |
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{ |
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$this->resetAttempts($key); |
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$this->cache->forget($key.':lockout'); |
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} |
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/** |
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* Get the number of seconds until the "key" is accessible again. |
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* |
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* @param string $key |
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* |
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* @return int |
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*/ |
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public function availableIn($key) |
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{ |
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return $this->cache->get($key.':lockout') - Carbon::now()->getTimestamp(); |
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} |
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} |
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Adding a
@return
annotation to a constructor is not recommended, since a constructor does not have a meaningful return value.Please refer to the PHP core documentation on constructors.