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<?php |
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declare(strict_types=1); |
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namespace HttpSoft\ErrorHandler; |
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use ErrorException; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Throwable; |
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use function error_reporting; |
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use function get_class; |
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use function restore_error_handler; |
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use function set_error_handler; |
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trait ErrorHandlerTrait |
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{ |
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/** |
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* @var ErrorListenerInterface[] |
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*/ |
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private array $listeners = []; |
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/** |
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* @var ErrorResponseGeneratorInterface |
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*/ |
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private ErrorResponseGeneratorInterface $responseGenerator; |
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/** |
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* Adds an error listener to the queue. |
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* |
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* @param ErrorListenerInterface $listener |
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*/ |
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public function addListener(ErrorListenerInterface $listener): void |
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{ |
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$this->listeners[get_class($listener)] = $listener; |
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} |
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/** |
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* Handles errors and exceptions in the layers it wraps. |
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* |
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* When an exception is intercepted, a response with error information is generated and returned; |
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* otherwise, the response returned by `Psr\Http\Server\RequestHandlerInterface` instance is used. |
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* |
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* @param ServerRequestInterface $request |
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* @param RequestHandlerInterface $handler |
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* @return ResponseInterface |
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* @throws ErrorException |
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*/ |
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private function handleError(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
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{ |
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set_error_handler(static function (int $severity, string $message, string $file, int $line): bool { |
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// https://www.php.net/manual/en/function.error-reporting.php#8866 |
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// Usages the defined levels of `error_reporting()`. |
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if (!(error_reporting() & $severity)) { |
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// This error code is not included in `error_reporting()`. |
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return true; |
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} |
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throw new ErrorException($message, 0, $severity, $file, $line); |
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}); |
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try { |
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$response = $handler->handle($request); |
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} catch (Throwable $error) { |
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$this->triggerListeners($error, $request); |
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$response = $this->generateResponse($error, $request); |
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} |
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restore_error_handler(); |
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return $response; |
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} |
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/** |
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* Trigger all error listeners. |
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* |
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* @param Throwable $error |
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* @param ServerRequestInterface $request |
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*/ |
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private function triggerListeners(Throwable $error, ServerRequestInterface $request): void |
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{ |
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foreach ($this->listeners as $listener) { |
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$listener->trigger($error, $request); |
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} |
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} |
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/** |
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* Returns a response with a valid status code. |
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* |
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* If the generated response has a valid status code, it will be returned unchanged. |
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* |
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* If the status code of the generated response is invalid, but the error |
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* code is valid, the response code will be changed to an error code. |
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* |
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* If the status code of the generated response and error code are |
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* not valid, a response with the status code 500 is returned. |
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* |
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* @see isValidResponseCode() |
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* @param Throwable $error |
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* @param ServerRequestInterface $request |
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* @return ResponseInterface |
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* @psalm-suppress RedundantCastGivenDocblockType |
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*/ |
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private function generateResponse(Throwable $error, ServerRequestInterface $request): ResponseInterface |
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{ |
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$response = $this->responseGenerator->generate($error, $request); |
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if ($this->isValidResponseCode((int) $response->getStatusCode())) { |
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return $response; |
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} |
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if ($this->isValidResponseCode((int) $error->getCode())) { |
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return $response->withStatus((int) $error->getCode()); |
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} |
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return $response->withStatus(500); |
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} |
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/** |
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* Checks whether the response status code is valid or not. |
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* |
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* The valid response status code must be 4xx (client errors) or 5xx (server errors). |
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* |
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* @param int $responseCode |
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* @return bool |
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*/ |
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private function isValidResponseCode(int $responseCode): bool |
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{ |
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return ($responseCode >= 400 && $responseCode < 600); |
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} |
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} |
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httpsoft /
http-error-handler
