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<?php |
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namespace Core; |
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/** |
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* Class AjaxController |
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* @package Core |
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* |
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* out parent controller for all ajax calls |
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* |
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*/ |
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abstract class AjaxController extends Controller |
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{ |
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/** |
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* The request object to handle all gets and posts |
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* @var Dependency\Request |
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* |
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*/ |
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protected $request; |
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/** |
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* The response module to handle response messages |
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* @var Dependency\Response |
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*/ |
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protected $response; |
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/** |
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* On construction, we imediatly check for security and bail out on the first sign of fraude |
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* Only allow XmlHTTPRequests or throw an exception |
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* Only allowed to call if Csrf token is valid or throw a json error |
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* AjaxController constructor. |
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* @param Container $container |
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* @throws \Exception |
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* |
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*/ |
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public function __construct(Container $container) |
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{ |
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parent::__construct($container); |
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$this->request = $container->getRequest(); //adding our request object as it will be needed in the ajax calls |
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$this->response = $container->getResponse(); |
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//we only allow xmlHTTPRequests here for security |
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$this->checkXlmRequest(); |
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$this->checkReferer(); |
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$this->csrf->checkJsonCsrf(); |
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} |
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/** |
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* Checks if we have an Xml Http request and throws an error if not |
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* @throws \ErrorException |
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*/ |
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private function checkXlmRequest(): void |
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{ |
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if (!$this->request->isXmlRequest()) { |
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throw new \ErrorException('Call not permitted', 404); |
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} |
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} |
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/** |
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* Check if the request is coming from the same domain as the base url of the site |
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* @throws JsonException |
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*/ |
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private function checkReferer(): void |
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{ |
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$referer = $this->request->getReferer(); |
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$baseUrl = $this->request->getBaseUrl(); |
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$inUrl = strpos($referer, $baseUrl); |
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if ($inUrl === false || $inUrl > 0) { //not at start of referer |
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if ($referer !== null) {//the referer can be null with certain navigators, so don't block on that |
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throw new JsonException('Illegal referer.'); |
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} |
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} |
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} |
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/** |
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* Construct our json reply message |
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* @param $message |
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* @param int $code |
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* @return string json encoded message |
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*/ |
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public function jsonResponse($message = null, $code = 200): string |
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{ |
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// clear the old headers |
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//header_remove(); //->this removes our csrf error checking so no go for the moment. |
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// set the actual code |
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http_response_code($code); |
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// set the header to make sure cache is forced |
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header("Cache-Control: no-transform,public,max-age=300,s-maxage=900"); |
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// treat this as json |
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//header('Content-Type: application/json'); |
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$this->response->setHeaderContentType('json'); |
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$status = array( |
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200 => '200 OK', |
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400 => '400 Bad Request', |
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422 => 'Unprocessable Entity', |
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500 => '500 Internal Server Error' |
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); |
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// ok, validation error, or failure |
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header('Status: ' . $status[$code]); |
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// return the encoded json |
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return json_encode(array( |
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'status' => $code < 300, // success or not? |
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'message' => $message |
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)); |
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} |
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114
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} |
Starbugstone /
blogoc
