Breaking: #92502 - Make Extbase handle PSR-7 responses only 

Description 

Extbase does no longer handle/return extbase responses whose api was defined by the interface \TYPO3\CMS\Extbase\Mvc\ResponseInterface. Instead, Extbase does create a PSR-7 compatible response object (see \Psr\Http\Message\ResponseInterface ) and passes it back through the request handling stack.

Since PSR-7 requires response objects to be immutable, it no longer makes sense to expose the response object to the user via TYPO3\CMS\Extbase\Mvc\Controller\ActionController::$response and TYPO3\CMS\Extbase\Mvc\Controller\ControllerContext->getResponse().

The following interface has been removed and is no longer usable:

• \TYPO3\CMS\Extbase\Mvc\ResponseInterface

The following class has been removed and is no longer usable:

• \TYPO3\CMS\Extbase\Mvc\Response

Impact 

Since interface \TYPO3\CMS\Extbase\Mvc\ResponseInterface and class \TYPO3\CMS\Extbase\Mvc\Response have been removed, they can no longer be used.

Affected Installations 

All installations that:

• declared classes that implemented the interface \TYPO3\CMS\Extbase\Mvc\ResponseInterface
• instantiated or extended class \TYPO3\CMS\Extbase\Mvc\Response
• accessed the request object through TYPO3\CMS\Extbase\Mvc\Controller\ActionController::$response or TYPO3\CMS\Extbase\Mvc\Controller\ControllerContext->getResponse()

Migration 

To regain full control over the response object, a PSR-7 compatible response object SHOULD be created in the controller action and returned instead of returning a string or void.

Example:

public function listAction()
{
    // do your action stuff
    return $this->htmlResponse();
}

Further: Method TYPO3\CMS\Extbase\Mvc\Response::addAdditionalHeaderData() had been used to add additional header data such as css or js to the global TypoScriptFrontendController. This has to be done via \TYPO3\CMS\Core\Page\AssetCollector now.