Php – How to get the body of SENT data with Guzzle PHP

guzzlehttpPHP

I am using Guzzle (v6.1.1) in PHP to make a POST request to a server. It works fine. I am adding some logging functions to log what was sent and received and I can't figure out how to get the data that Guzzle sent to the server. I can get the response just fine, but how do I get the sent data? (Which would be the JSON string.)

Here is the relevant portion of my code:

$client = new GuzzleHttp\Client(['base_uri' => $serviceUrlPayments ]);
    try {
       $response = $client->request('POST', 'Charge', [
            'auth' => [$securenetId, $secureKey],
            'json' => [     "amount" => $amount,
                            "paymentVaultToken" => array(
                                    "customerId" => $customerId,
                                    "paymentMethodId" => $token,
                                    "publicKey" => $publicKey
                                    ),
                            "extendedInformation" => array(
                                    "typeOfGoods" => $typeOfGoods,
                                    "userDefinedFields" => $udfs,
                                    "notes" => $Notes
                                    ),
                            'developerApplication'=> $developerApplication 
            ]
    ]);

    } catch (ServerErrorResponseException $e) {
        echo (string) $e->getResponse()->getBody();
    }


    echo $response->getBody(); // THIS CORRECTLY SHOWS THE SERVER RESPONSE
    echo $client->getBody();           // This doesn't work
    echo $client->request->getBody();  // nor does this

Any help would be appreciated. I did try to look in Guzzle sourcecode for a function similar to getBody() that would work with the request, but I'm not a PHP expert so I didn't come up with anything helpful. I also searched Google a lot but found only people talking about getting the response back from the server, which I have no trouble with.

Best Answer

You can do this work by creating a Middleware. 

use GuzzleHttp\Client;
use GuzzleHttp\HandlerStack;
use GuzzleHttp\Middleware;
use Psr\Http\Message\RequestInterface;

$stack = HandlerStack::create();
// my middleware
$stack->push(Middleware::mapRequest(function (RequestInterface $request) {
    $contentsRequest = (string) $request->getBody();
    //var_dump($contentsRequest);

    return $request;
}));

$client = new Client([
    'base_uri' => 'http://www.example.com/api/',
    'handler' => $stack
]);

$response = $client->request('POST', 'itemupdate', [
    'auth' => [$username, $password],
    'json' => [
        "key" => "value",
        "key2" => "value",
    ]
]);

This, however, is triggered before to receive the response. You may want to do something like this:

$stack->push(function (callable $handler) {
    return function (RequestInterface $request, array $options) use ($handler) {
        return $handler($request, $options)->then(
            function ($response) use ($request) {
                // work here
                $contentsRequest = (string) $request->getBody();
                //var_dump($contentsRequest);
                return $response;
            }
        );
    };
});
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