PHP code example of muffin / throttle

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

muffin / throttle example snippets

'throttle' => [
    'className' => 'Apcu',
    'prefix' => 'throttle_'
],

public function middleware(MiddlewareQueue $middlewareQueue): MiddlewareQueue
{
    // Various other middlewares for error handling, routing etc. added here.

    $throttleMiddleware = new \Muffin\Throttle\Middleware\ThrottleMiddleware([
        // Data used to generate response with HTTP code 429 when limit is exceeded.
        'response' => [
            'body' => 'Rate limit exceeded',
        ],
        // Time period as number of seconds
        'period' => 60,
        // Number of requests allowed within the above time period
        'limit' => 100,
        // Client identifier
        'identifier' => function ($request) {
            if (!empty($request->getHeaderLine('Authorization'))) {
                return str_replace('Bearer ', '', $request->getHeaderLine('Authorization'));
            }

            return $request->clientIp();
        }
    ]);

    $middlewareQueue->add($throttleMiddleware);

    return $middlewareQueue;
}

\Cake\Event\EventManager::instance()->on(
    \Muffin\Throttle\Middleware\ThrottleMiddleware::EVENT_BEFORE_THROTTLE,
    function ($event, $request) {
        if (/* check for something here, most likely using $request */) {
            $event->stopPropagation();
        }
    }
);

\Cake\Event\EventManager::instance()->on(
    \Muffin\Throttle\Middleware\ThrottleMiddleware::EVENT_GET_THROTTLE_INFO,
    function ($event, $request, \Muffin\Throttle\ValueObject\ThrottleInfo $throttle) {
        // Set a different period for POST request.
        if ($request->is('POST')) {
            // This will change the cache key from default "{identifer}" to "{identifer}.post".
            $throttle->appendToKey('post');
            $throttle->setPeriod(30);
        }

        // Modify limit for logged in user
        $identity = $request->getAttribute('identity');
        if ($identity) {
            $throttle->appendToKey($identity->get('role'));
            $throttle->setLimit(200);
        }
    }
);

\Cake\Event\EventManager::instance()->on(
    \Muffin\Throttle\Middleware\ThrottleMiddleware::EVENT_BEFORE_CACHE_SET,
    function ($event, \Muffin\Throttle\ValueObject\RateLimitInfo $rateLimit, int $ttl, \Muffin\Throttle\ValueObject\ThrottleInfo $throttleInfo) {
        \Cake\Log\Log::debug(sprintf("key(%s) remaining(%d) resetTimestamp(%d) ttl(%d)", $throttleInfo->getKey(), $rateLimit->getRemaining(), $rateLimit->getResetTimestamp(), $ttl));
    }
);

'headers' => [
    'limit' => 'X-MyRateLimit-Limit',
    'remaining' => 'X-MyRateLimit-Remaining',
    'reset' => 'X-MyRateLimit-Reset',
]

new \Muffin\Throttle\Middleware\ThrottleMiddleware([
    'response' => [
        'body' => json_encode(['error' => 'Rate limit exceeded']),
        'type' => 'json',
        'headers' => [
            'Custom-Header' => 'custom_value',
        ]
    ],
    'limit' => 300,
]);