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<?php |
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/** |
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* Whoops - php errors for cool kids |
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* @author Filipe Dobreira <http://github.com/filp> |
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*/ |
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namespace Whoops; |
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use InvalidArgumentException; |
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use Whoops\Exception\ErrorException; |
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use Whoops\Exception\Inspector; |
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use Whoops\Handler\CallbackHandler; |
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use Whoops\Handler\Handler; |
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use Whoops\Handler\HandlerInterface; |
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use Whoops\Util\Misc; |
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use Whoops\Util\SystemFacade; |
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final class Run implements RunInterface |
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{ |
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private $isRegistered; |
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private $allowQuit = true; |
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private $sendOutput = true; |
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/** |
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* @var integer|false |
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*/ |
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private $sendHttpCode = 500; |
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/** |
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* @var HandlerInterface[] |
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*/ |
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private $handlerStack = []; |
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private $silencedPatterns = []; |
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private $system; |
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public function __construct(SystemFacade $system = null) |
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{ |
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$this->system = $system ?: new SystemFacade; |
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} |
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/** |
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* Pushes a handler to the end of the stack |
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* |
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* @throws InvalidArgumentException If argument is not callable or instance of HandlerInterface |
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* @param Callable|HandlerInterface $handler |
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* @return Run |
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*/ |
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public function pushHandler($handler) |
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{ |
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if (is_callable($handler)) { |
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$handler = new CallbackHandler($handler); |
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} |
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if (!$handler instanceof HandlerInterface) { |
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throw new InvalidArgumentException( |
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"Argument to " . __METHOD__ . " must be a callable, or instance of " |
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. "Whoops\\Handler\\HandlerInterface" |
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); |
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} |
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$this->handlerStack[] = $handler; |
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return $this; |
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} |
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/** |
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* Removes the last handler in the stack and returns it. |
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* Returns null if there"s nothing else to pop. |
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* @return null|HandlerInterface |
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*/ |
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public function popHandler() |
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{ |
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return array_pop($this->handlerStack); |
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} |
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/** |
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* Returns an array with all handlers, in the |
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* order they were added to the stack. |
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* @return array |
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*/ |
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public function getHandlers() |
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{ |
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return $this->handlerStack; |
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} |
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/** |
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* Clears all handlers in the handlerStack, including |
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* the default PrettyPage handler. |
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* @return Run |
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*/ |
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public function clearHandlers() |
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{ |
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$this->handlerStack = []; |
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return $this; |
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} |
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/** |
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* @param \Throwable $exception |
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* @return Inspector |
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*/ |
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private function getInspector($exception) |
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{ |
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return new Inspector($exception); |
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} |
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/** |
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* Registers this instance as an error handler. |
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* @return Run |
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*/ |
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public function register() |
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{ |
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if (!$this->isRegistered) { |
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// Workaround PHP bug 42098 |
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// https://bugs.php.net/bug.php?id=42098 |
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class_exists("\\Whoops\\Exception\\ErrorException"); |
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class_exists("\\Whoops\\Exception\\FrameCollection"); |
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class_exists("\\Whoops\\Exception\\Frame"); |
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class_exists("\\Whoops\\Exception\\Inspector"); |
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$this->system->setErrorHandler([$this, self::ERROR_HANDLER]); |
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$this->system->setExceptionHandler([$this, self::EXCEPTION_HANDLER]); |
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$this->system->registerShutdownFunction([$this, self::SHUTDOWN_HANDLER]); |
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$this->isRegistered = true; |
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} |
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return $this; |
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} |
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/** |
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* Unregisters all handlers registered by this Whoops\Run instance |
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* @return Run |
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*/ |
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public function unregister() |
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{ |
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if ($this->isRegistered) { |
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$this->system->restoreExceptionHandler(); |
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$this->system->restoreErrorHandler(); |
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$this->isRegistered = false; |
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} |
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return $this; |
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} |
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/** |
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* Should Whoops allow Handlers to force the script to quit? |
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* @param bool|int $exit |
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* @return bool |
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*/ |
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public function allowQuit($exit = null) |
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{ |
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if (func_num_args() == 0) { |
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return $this->allowQuit; |
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} |
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return $this->allowQuit = (bool) $exit; |
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} |
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/** |
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* Silence particular errors in particular files |
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* @param array|string $patterns List or a single regex pattern to match |
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* @param int $levels Defaults to E_STRICT | E_DEPRECATED |
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* @return \Whoops\Run |
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*/ |
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public function silenceErrorsInPaths($patterns, $levels = 10240) |
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{ |
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$this->silencedPatterns = array_merge( |
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$this->silencedPatterns, |
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array_map( |
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function ($pattern) use ($levels) { |
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return [ |
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"pattern" => $pattern, |
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"levels" => $levels, |
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]; |
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}, |
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(array) $patterns |
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) |
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); |
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return $this; |
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} |
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/** |
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* Returns an array with silent errors in path configuration |
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* |
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* @return array |
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*/ |
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public function getSilenceErrorsInPaths() |
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{ |
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return $this->silencedPatterns; |
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} |
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/* |
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* Should Whoops send HTTP error code to the browser if possible? |
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* Whoops will by default send HTTP code 500, but you may wish to |
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* use 502, 503, or another 5xx family code. |
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* |
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* @param bool|int $code |
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* @return int|false |
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*/ |
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public function sendHttpCode($code = null) |
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{ |
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if (func_num_args() == 0) { |
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return $this->sendHttpCode; |
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} |
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if (!$code) { |
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return $this->sendHttpCode = false; |
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} |
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if ($code === true) { |
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$code = 500; |
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} |
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if ($code < 400 || 600 <= $code) { |
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throw new InvalidArgumentException( |
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"Invalid status code '$code', must be 4xx or 5xx" |
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); |
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} |
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return $this->sendHttpCode = $code; |
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} |
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/** |
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* Should Whoops push output directly to the client? |
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* If this is false, output will be returned by handleException |
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* @param bool|int $send |
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* @return bool |
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*/ |
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public function writeToOutput($send = null) |
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{ |
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if (func_num_args() == 0) { |
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return $this->sendOutput; |
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} |
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return $this->sendOutput = (bool) $send; |
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} |
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/** |
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* Handles an exception, ultimately generating a Whoops error |
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* page. |
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* |
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* @param \Throwable $exception |
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* @return string Output generated by handlers |
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*/ |
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public function handleException($exception) |
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{ |
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// Walk the registered handlers in the reverse order |
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// they were registered, and pass off the exception |
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$inspector = $this->getInspector($exception); |
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// Capture output produced while handling the exception, |
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// we might want to send it straight away to the client, |
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// or return it silently. |
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$this->system->startOutputBuffering(); |
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// Just in case there are no handlers: |
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$handlerResponse = null; |
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$handlerContentType = null; |
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foreach (array_reverse($this->handlerStack) as $handler) { |
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$handler->setRun($this); |
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$handler->setInspector($inspector); |
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$handler->setException($exception); |
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// The HandlerInterface does not require an Exception passed to handle() |
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// and neither of our bundled handlers use it. |
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// However, 3rd party handlers may have already relied on this parameter, |
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// and removing it would be possibly breaking for users. |
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$handlerResponse = $handler->handle($exception); |
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// Collect the content type for possible sending in the headers. |
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$handlerContentType = method_exists($handler, 'contentType') ? $handler->contentType() : null; |
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if (in_array($handlerResponse, [Handler::LAST_HANDLER, Handler::QUIT])) { |
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// The Handler has handled the exception in some way, and |
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// wishes to quit execution (Handler::QUIT), or skip any |
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// other handlers (Handler::LAST_HANDLER). If $this->allowQuit |
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// is false, Handler::QUIT behaves like Handler::LAST_HANDLER |
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break; |
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} |
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} |
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$willQuit = $handlerResponse == Handler::QUIT && $this->allowQuit(); |
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$output = $this->system->cleanOutputBuffer(); |
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// If we're allowed to, send output generated by handlers directly |
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// to the output, otherwise, and if the script doesn't quit, return |
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// it so that it may be used by the caller |
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if ($this->writeToOutput()) { |
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// @todo Might be able to clean this up a bit better |
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if ($willQuit) { |
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// Cleanup all other output buffers before sending our output: |
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while ($this->system->getOutputBufferLevel() > 0) { |
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$this->system->endOutputBuffering(); |
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} |
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// Send any headers if needed: |
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if (Misc::canSendHeaders() && $handlerContentType) { |
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header("Content-Type: {$handlerContentType}"); |
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} |
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} |
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$this->writeToOutputNow($output); |
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} |
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if ($willQuit) { |
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// HHVM fix for https://github.com/facebook/hhvm/issues/4055 |
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$this->system->flushOutputBuffer(); |
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$this->system->stopExecution(1); |
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} |
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return $output; |
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} |
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/** |
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* Converts generic PHP errors to \ErrorException |
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* instances, before passing them off to be handled. |
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* |
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* This method MUST be compatible with set_error_handler. |
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* |
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* @param int $level |
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* @param string $message |
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* @param string $file |
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* @param int $line |
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* |
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* @return bool |
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* @throws ErrorException |
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*/ |
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5 |
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public function handleError($level, $message, $file = null, $line = null) |
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{ |
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5 |
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if ($level & $this->system->getErrorReportingLevel()) { |
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2 |
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foreach ($this->silencedPatterns as $entry) { |
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$pathMatches = (bool) preg_match($entry["pattern"], $file); |
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$levelMatches = $level & $entry["levels"]; |
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if ($pathMatches && $levelMatches) { |
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// Ignore the error, abort handling |
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// See https://github.com/filp/whoops/issues/418 |
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return true; |
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} |
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2 |
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} |
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// XXX we pass $level for the "code" param only for BC reasons. |
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// see https://github.com/filp/whoops/issues/267 |
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$exception = new ErrorException($message, /*code*/ $level, /*severity*/ $level, $file, $line); |
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2 |
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if ($this->canThrowExceptions) { |
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throw $exception; |
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} else { |
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$this->handleException($exception); |
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} |
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// Do not propagate errors which were already handled by Whoops. |
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return true; |
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} |
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// Propagate error to the next handler, allows error_get_last() to |
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// work on silenced errors. |
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3 |
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return false; |
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} |
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/** |
365
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* Special case to deal with Fatal errors and the like. |
366
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*/ |
367
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public function handleShutdown() |
368
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{ |
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// If we reached this step, we are in shutdown handler. |
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// An exception thrown in a shutdown handler will not be propagated |
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// to the exception handler. Pass that information along. |
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$this->canThrowExceptions = false; |
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|
374
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$error = $this->system->getLastError(); |
375
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if ($error && Misc::isLevelFatal($error['type'])) { |
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// If there was a fatal error, |
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// it was not handled in handleError yet. |
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$this->allowQuit = false; |
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$this->handleError( |
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$error['type'], |
381
|
|
|
$error['message'], |
382
|
|
|
$error['file'], |
383
|
|
|
$error['line'] |
384
|
|
|
); |
385
|
|
|
} |
386
|
|
|
} |
387
|
|
|
|
388
|
|
|
/** |
389
|
|
|
* In certain scenarios, like in shutdown handler, we can not throw exceptions |
390
|
|
|
* @var bool |
391
|
|
|
*/ |
392
|
|
|
private $canThrowExceptions = true; |
393
|
|
|
|
394
|
|
|
/** |
395
|
|
|
* Echo something to the browser |
396
|
|
|
* @param string $output |
397
|
|
|
* @return $this |
398
|
|
|
*/ |
399
|
3 |
|
private function writeToOutputNow($output) |
400
|
|
|
{ |
401
|
3 |
|
if ($this->sendHttpCode() && \Whoops\Util\Misc::canSendHeaders()) { |
402
|
|
|
$this->system->setHttpResponseCode( |
403
|
|
|
$this->sendHttpCode() |
|
|
|
|
404
|
|
|
); |
405
|
|
|
} |
406
|
|
|
|
407
|
3 |
|
echo $output; |
408
|
|
|
|
409
|
3 |
|
return $this; |
410
|
|
|
} |
411
|
|
|
} |
412
|
|
|
|