Caching your Laravel API with ETag and Conditional Requests

Hi Christian Widlund, if you wish to just use If-None-Match in your application in the easiest way possible, I would recommend using the cache control middleware bundled with Laravel. One small difference using our package is the support for HEAD requests, the Laravel middleware uses this condition:

        if (! $request->isMethodCacheable() || ! $response->getContent()) {
            return $response;
        }

In which the first condition will check if the request is either a GET or HEAD request, but the second condition will return false for HEAD requests as they don't return content.

The biggest difference however is simple the If-Match support. This is not included in the Laravel middleware at all. I suspect because it is almost impossible to make a "on size fits all" solution for If-Match, but our implementation should work for most common use cases.

This package will also keep getting updated and if possible, more conditional requests might get added.