README

Middleware components with the following cache utilities:

• CachePrevention
• Expires
• Cache
• ClearSiteData

Requirements

• PHP >= 8.1
• A PSR-7 http library
• A PSR-15 middleware dispatcher

Installation

This package is installable and autoloadable via Composer as middlewares/cache.

composer require middlewares/cache

CachePrevention

To add the response headers for cache prevention. Useful in development environments:

Dispatcher::run([
    new Middlewares\CachePrevention()
]);

Expires

This middleware adds the Expires and Cache-Control: max-age headers to the response. You can configure the cache duration for each mimetype. If it's not defined, use the defaults.

// Use the default configuration
$expires = new Middlewares\Expires();

// Custom durations
$expires = new Middlewares\Expires([
    'text/css' => '+1 year',
    'text/js' => '+1 week',
]);

defaultExpires

Set the default expires value if the request mimetype is not configured. By default is 1 month. Example:

//set 1 year lifetime to css and js
$durations = [
    'text/css' => '+1 year',
    'text/javascript' => '+1 year',
];

//and 1 hour to everything else
$default = '+1 hour';

$expires = (new Middlewares\Expires($durations))->defaultExpires($default);

Cache

Saves the response headers in a PSR-6 cache pool and returns 304 responses (Not modified) if the response is still valid (based on its ETag or Last-Modified header). This saves server resources and bandwidth because the body is returned empty. It's recomended to combine it with Expires to set the lifetime of the responses.

$cachePool = new Psr6CachePool();

Dispatcher::run([
    new Middlewares\Cache($cachePool),
    new Middlewares\Expires()
]);

Optionally, you can provide a Psr\Http\Message\ResponseFactoryInterface as the second argument to create the 304 empty responses. If it's not defined, Middleware\Utils\Factory will be used to detect it automatically.

$cachePool = new Psr6CachePool();
$responseFactory = new MyOwnResponseFactory();

$cache = new Middlewares\Cache($cachePool, $responseFactory);

ClearSiteData

Send the header Clear-Site-Data to remove all site data in the client (cache, cookies, storage etc)

Dispatcher::run([
    new Middlewares\ClearSiteData()
]);

Optionally, you can provide the list of data types that you want to clear.

$cache = new Middlewares\ClearSiteData('cache', 'cookies');

Please see CHANGELOG for more information about recent changes and CONTRIBUTING for contributing details.

The MIT License (MIT). Please see LICENSE for more information.