I am creating a module to capture response on controller_front_send_response_before event.

In my observer file, I am getting both request and response object but I am not able to locate below class of response object:


I am searching in /magento root/vendor/magento/framework/App directory.

Also, When I was trying to log response, I got only headers in log file. How can I get final content that will print on browser?

In onbserver file I have written following code:


namespace Ktpl\Logresponse\Observer\Response;

use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\Event\Observer;

class Capture implements ObserverInterface
    private $logger;

    public function __construct(\Psr\Log\LoggerInterface $logger) {
        $this->logger = $logger;

    public function execute(Observer $observer) {
        try {
            $response = $observer->getEvent()->getData('response');
        } catch(\Exception $e) {

Please share if anyone has any idea about this.

  • Refer useful to you blog.belvg.com/declaring-observers-in-magento-2-0.html Mar 2, 2016 at 12:52
  • Thank you for this useful link -- but my observer is working fine. When I call get_class function for response object, it gives me this class: Magento\Framework\App\Response\Http\Interceptor and I'm not able to locate this class.
    – Shyam
    Mar 2, 2016 at 12:56
  • Also, how can I get final content from response object?
    – Shyam
    Mar 2, 2016 at 12:57

1 Answer 1


the class Magento\Framework\App\Response\Http\Interceptor is generated by the ObjectManager.

You can find the class on your Server under var/generation/Magento/Framework/App/Response/Http/Interceptor.php

This class is responsible for executing all Plugins defined for Magento\Framework\App\Response\Http

So the Actual Response Object is still Magento\Framework\App\Response\Http, but the Interceptor class is injected as a wrapper for this.


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