/**
* Cleans the output buffer and builds a default HTTP 200 OK "Allow" response to an OPTIONS request.
*/
private function prepareOptionsResponse()
{
ob_clean();
// Determine which options have been set up for this route based on the registered routes
$optionsForRoute = $this->router->getOptions($this->request);
$methodsAllowed = [RequestMethod::OPTIONS];
foreach ($optionsForRoute as $route) {
// Extend the set of acceptable methods with the ones set up for this route
$acceptableMethods = $route->getAcceptableMethods();
$methodsAllowed = array_merge_recursive($methodsAllowed, $acceptableMethods);
}
array_unique($methodsAllowed);
$this->response = new Response();
$this->response->setResponseCode(ResponseCode::HTTP_OK);
$this->response->setHeader('Allow', implode(',', $methodsAllowed));
$this->response->setBody('');
$this->context->registerInstance($this->response);
$this->finalizeOutputBuffer();
}
