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<?php
/**
* SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\AppFramework\Middleware;
use OC\AppFramework\Http;
use OC\AppFramework\OCS\BaseResponse;
use OC\AppFramework\OCS\V1Response;
use OC\AppFramework\OCS\V2Response;
use OCP\AppFramework\Controller;
use OCP\AppFramework\Http\DataResponse;
use OCP\AppFramework\Http\JSONResponse;
use OCP\AppFramework\Http\Response;
use OCP\AppFramework\Middleware;
use OCP\AppFramework\OCS\OCSException;
use OCP\AppFramework\OCSController;
use OCP\IRequest;
class OCSMiddleware extends Middleware {
/** @var IRequest */
private $request;
/** @var int */
private $ocsVersion;
/**
* @param IRequest $request
*/
public function __construct(IRequest $request) {
$this->request = $request;
}
/**
* @param Controller $controller
* @param string $methodName
*/
public function beforeController($controller, $methodName) {
if ($controller instanceof OCSController) {
if (substr_compare($this->request->getScriptName(), '/ocs/v2.php', -strlen('/ocs/v2.php')) === 0) {
$this->ocsVersion = 2;
} else {
$this->ocsVersion = 1;
}
$controller->setOCSVersion($this->ocsVersion);
}
}
/**
* @param Controller $controller
* @param string $methodName
* @param \Exception $exception
* @throws \Exception
* @return BaseResponse
*/
public function afterException($controller, $methodName, \Exception $exception) {
if ($controller instanceof OCSController && $exception instanceof OCSException) {
$code = $exception->getCode();
if ($code === 0) {
$code = \OCP\AppFramework\OCSController::RESPOND_UNKNOWN_ERROR;
}
return $this->buildNewResponse($controller, $code, $exception->getMessage());
}
throw $exception;
}
/**
* @param Controller $controller
* @param string $methodName
* @param Response $response
* @return \OCP\AppFramework\Http\Response
*/
public function afterController($controller, $methodName, Response $response) {
/*
* If a different middleware has detected that a request unauthorized or forbidden
* we need to catch the response and convert it to a proper OCS response.
*/
if ($controller instanceof OCSController && !($response instanceof BaseResponse)) {
if ($response->getStatus() === Http::STATUS_UNAUTHORIZED) {
$message = '';
if ($response instanceof JSONResponse) {
/** @var DataResponse $response */
$message = $response->getData()['message'];
}
return $this->buildNewResponse($controller, OCSController::RESPOND_UNAUTHORISED, $message);
}
if ($response->getStatus() === Http::STATUS_FORBIDDEN) {
$message = '';
if ($response instanceof JSONResponse) {
/** @var DataResponse $response */
$message = $response->getData()['message'];
}
return $this->buildNewResponse($controller, Http::STATUS_FORBIDDEN, $message);
}
}
return $response;
}
/**
* @param Controller $controller
* @param int $code
* @param string $message
* @return V1Response|V2Response
*/
private function buildNewResponse(Controller $controller, $code, $message) {
$format = $this->getFormat($controller);
$data = new DataResponse();
$data->setStatus($code);
if ($this->ocsVersion === 1) {
$response = new V1Response($data, $format, $message);
} else {
$response = new V2Response($data, $format, $message);
}
return $response;
}
/**
* @param Controller $controller
* @return string
*/
private function getFormat(Controller $controller) {
// get format from the url format or request format parameter
$format = $this->request->getParam('format');
// if none is given try the first Accept header
if ($format === null) {
$headers = $this->request->getHeader('Accept');
$format = $controller->getResponderByHTTPHeader($headers, 'xml');
}
return $format;
}
}
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