Laravel Cache::store('file')

[J-Yen]

Does the following code work?

$stack->push(
    new CacheMiddleware(
        new PrivateCacheStrategy(
            new LaravelCacheStorage(
                Cache::store('file')
            )
        )
    ),
    'cache'
);

Where is the cache saved? Normally in storage/framework/cache but i don't find the cache file.

[Kevinrob]

@M165437 Can you help us on this?

[M165437]

@J-Yen Have a look at the file config/cache.php and https://laravel.com/docs/5.2/cache. Make sure caching works outside of the Guzzle middleware before using it, e.g. in the router

Route::get('/', function () {
    Cache::store('file')->put('hello', 'world', 5);
    $value = Cache::store('file')->get('hello');
    return $value; // -> world
});

By the way, it's not one cache file but rather a folder structure. Correct, by default in storage/framework/cache.

[J-Yen]

Caching already works outside the Guzzle middleware and i already use it. Also your example works.
But with the middleware, no new directory or file is created in the folder structure.

[M165437]

Can you post more of your code? The part you posted above should work.

[J-Yen]

class ConnectorService
{
    private $connectionUrl = 'http://...';
    private $client;

    function __construct()
    {
        $stack = HandlerStack::create();

        $stack->push(
            new CacheMiddleware(
                new PrivateCacheStrategy(
                    new LaravelCacheStorage(
                        Cache::store('file')
                    )
                )
            ),
            'cache'
        );
        $this->client = new GuzzleHttp\Client(['handler' => $stack]);
    }



public function post_request($postArgs)
 {
        $response = $this->client->request('POST', $this->connectionUrl, [
            'form_params' => $postArgs,
        ])->getBody();
        return json_decode($response);
}

[M165437]

Looks good. What about the response headers? Are you sure the response wants to be cached? You can check the headers with Laravel's dd() (dump and die) method, although you'd need to remove the ->getBody() from your client request:

public function post_request($postArgs)
 {
        $response = $this->client->request('POST', $this->connectionUrl, [
            'form_params' => $postArgs,
        ]);
        dd($response->getHeaders()); // temporarily
        return json_decode($response->getBody());
}

[J-Yen]

Ow yes that is the cause.

["Cache-Control"]=>
  array(1) {
    [0]=>
    string(62) "no-store, no-cache, must-revalidate, post-check=0, pre-check=0"
  }
  ["Pragma"]=>
  array(1) {
    [0]=>
    string(8) "no-cache"
  }

Thank you very much!

[M165437]

You're welcome! :-)

[J-Yen]

Now only figure out how to change it :-)

[M165437]

@Kevinrob Honestly, I had the same struggle initially. :-) The Cache-Control header might be worth a paragraph in the README file.

[Kevinrob]

You can use the GreedyCacheStrategy. It doesn't care about headers from the server.
Yeah, I think that it can be added to the README 😄 (#42)

[J-Yen]

So i have changed my code to:

$stack->push(
   new CacheMiddleware(
        new GreedyCacheStrategy(
            new LaravelCacheStorage(
                Cache::store('file')
            ),
            5000
        )
    ),
    'cache'
);

But still no caching...

[M165437]

Try this minimal example in App/Http/routes.php. This works for me.

use GuzzleHttp\Client;
use GuzzleHttp\HandlerStack;
use Illuminate\Support\Facades\Cache;
use Kevinrob\GuzzleCache\CacheMiddleware;
use Kevinrob\GuzzleCache\Storage\LaravelCacheStorage;
use Kevinrob\GuzzleCache\Strategy\GreedyCacheStrategy;

Route::get('/guzzle-cache-test', function () {
    $stack = HandlerStack::create();

    $stack->push(new CacheMiddleware(
        new GreedyCacheStrategy(
            new LaravelCacheStorage(
                Cache::store('file')
            ), 5000
        )
    ), 'cache');

    $client = new Client(['handler' => $stack]);
    $responseBody = $client->get('http://github.com')->getBody();

    return $responseBody->getContents();
});

[M165437]

What about File Permissions? Have you checked your error logs? Maybe Laravel isn't able to write the cache to the file system?

[J-Yen]

No errors in the error logs. It should be able to write the cache to the file system because it's working with your example and in the rest of my code?

[J-Yen]

It is a Lumen project, can this be a problem?

[M165437]

That's quite a valuable info. Did you uncommented the $app->withFacades() method call in the bootstrap/app.php file?

[M165437]

Well, of course, otherwise the caching wouldn't work at all.

[M165437]

So, if my example works, it's obviously not a problem with the middleware.

[J-Yen]

yes i did uncommented the $app->withFacades() method.
Does your example work or are you going to test it?

[M165437]

It works in Laravel. Lumen and Laravel are not the same thing. Something that works in Lumen will probably work in Laravel but not necessarily vice versa. Next time please specify your framework up front. The Laravel interface was created for and tested with Laravel. I don't know if it works with Lumen.

[J-Yen]

Yes you're right I forgot an important detail. Nevertheless thank you very much for the quick help.

[M165437]

Out of curiosity I set up a Lumen project. The route example above works fine. So the LaravelCacheStorage interface is Lumen compatible as well. :-)

[Kevinrob]

Can we close this issue?

[M165437]

Yes, I think so.

[tuanpht]

I use this to check if cache works. Hope it help someone :)

use GuzzleHttp\Client;
use GuzzleHttp\HandlerStack;
use Illuminate\Support\Facades\Cache;
use Kevinrob\GuzzleCache\CacheMiddleware;
use Kevinrob\GuzzleCache\Storage\LaravelCacheStorage;
use Kevinrob\GuzzleCache\Strategy\GreedyCacheStrategy;

Route::get('/guzzle-cache-test', function () {
    $stack = HandlerStack::create();

    $stack->push(new CacheMiddleware(
        new GreedyCacheStrategy(
            new LaravelCacheStorage(
                Cache::store('file')
            ), 5
        )
    ), 'cache');

    $client = new Client(['handler' => $stack]);
    $responseBody = $client->get('http://localhost:1234/time.php')->getBody();

    return $responseBody->getContents();
});

// http://localhost:1234/time.php
echo 'SERVER TIME: ' . date('Y-m-d H:i:s') . PHP_EOL;

If cache works, time will be increased by 5 seconds.

[randhipp]

Try this minimal example in App/Http/routes.php. This works for me.

use GuzzleHttp\Client;
use GuzzleHttp\HandlerStack;
use Illuminate\Support\Facades\Cache;
use Kevinrob\GuzzleCache\CacheMiddleware;
use Kevinrob\GuzzleCache\Storage\LaravelCacheStorage;
use Kevinrob\GuzzleCache\Strategy\GreedyCacheStrategy;

Route::get('/guzzle-cache-test', function () {
    $stack = HandlerStack::create();

    $stack->push(new CacheMiddleware(
        new GreedyCacheStrategy(
            new LaravelCacheStorage(
                Cache::store('file')
            ), 5000
        )
    ), 'cache');

    $client = new Client(['handler' => $stack]);
    $responseBody = $client->get('http://github.com')->getBody();

    return $responseBody->getContents();
});

This method working for me