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DebugHandlersListener.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\HttpKernel\EventListener;
013
014 use Psr\Log\LoggerInterface;
015 use Symfony\Component\Console\ConsoleEvents;
016 use Symfony\Component\Console\Event\ConsoleEvent;
017 use Symfony\Component\Console\Output\ConsoleOutputInterface;
018 use Symfony\Component\Debug\ErrorHandler;
019 use Symfony\Component\Debug\ExceptionHandler;
020 use Symfony\Component\EventDispatcher\Event;
021 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
022 use Symfony\Component\HttpKernel\Debug\FileLinkFormatter;
023 use Symfony\Component\HttpKernel\Event\KernelEvent;
024 use Symfony\Component\HttpKernel\KernelEvents;
025
026 /**
027 * Configures errors and exceptions handlers.
028 *
029 * @author Nicolas Grekas <p@tchwork.com>
030 */
031 class DebugHandlersListener implements EventSubscriberInterface
032 {
033 private $exceptionHandler;
034 private $logger;
035 private $levels;
036 private $throwAt;
037 private $scream;
038 private $fileLinkFormat;
039 private $scope;
040 private $firstCall = true;
041 private $hasTerminatedWithException;
042
043 /**
044 * @param callable|null $exceptionHandler A handler that will be called on Exception
045 * @param LoggerInterface|null $logger A PSR-3 logger
046 * @param array|int $levels An array map of E_* to LogLevel::* or an integer bit field of E_* constants
047 * @param int|null $throwAt Thrown errors in a bit field of E_* constants, or null to keep the current value
048 * @param bool $scream Enables/disables screaming mode, where even silenced errors are logged
049 * @param string|FileLinkFormatter|null $fileLinkFormat The format for links to source files
050 * @param bool $scope Enables/disables scoping mode
051 */
052 public function __construct(callable $exceptionHandler = null, LoggerInterface $logger = null, $levels = \E_ALL, $throwAt = \E_ALL, $scream = true, $fileLinkFormat = null, $scope = true)
053 {
054 $this->exceptionHandler = $exceptionHandler;
055 $this->logger = $logger;
056 $this->levels = null === $levels ? \E_ALL : $levels;
057 $this->throwAt = is_numeric($throwAt) ? (int) $throwAt : (null === $throwAt ? null : ($throwAt ? \E_ALL : null));
058 $this->scream = (bool) $scream;
059 $this->fileLinkFormat = $fileLinkFormat;
060 $this->scope = (bool) $scope;
061 }
062
063 /**
064 * Configures the error handler.
065 */
066 public function configure(Event $event = null)
067 {
068 if ($event instanceof ConsoleEvent && !\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
069 return;
070 }
071 if (!$event instanceof KernelEvent ? !$this->firstCall : !$event->isMasterRequest()) {
072 return;
073 }
074 $this->firstCall = $this->hasTerminatedWithException = false;
075
076 $handler = set_exception_handler('var_dump');
077 $handler = \is_array($handler) ? $handler[0] : null;
078 restore_exception_handler();
079
080 if ($this->logger || null !== $this->throwAt) {
081 if ($handler instanceof ErrorHandler) {
082 if ($this->logger) {
083 $handler->setDefaultLogger($this->logger, $this->levels);
084 if (\is_array($this->levels)) {
085 $levels = 0;
086 foreach ($this->levels as $type => $log) {
087 $levels |= $type;
088 }
089 } else {
090 $levels = $this->levels;
091 }
092 if ($this->scream) {
093 $handler->screamAt($levels);
094 }
095 if ($this->scope) {
096 $handler->scopeAt($levels & ~\E_USER_DEPRECATED & ~\E_DEPRECATED);
097 } else {
098 $handler->scopeAt(0, true);
099 }
100 $this->logger = $this->levels = null;
101 }
102 if (null !== $this->throwAt) {
103 $handler->throwAt($this->throwAt, true);
104 }
105 }
106 }
107 if (!$this->exceptionHandler) {
108 if ($event instanceof KernelEvent) {
109 if (method_exists($kernel = $event->getKernel(), 'terminateWithException')) {
110 $request = $event->getRequest();
111 $hasRun = &$this->hasTerminatedWithException;
112 $this->exceptionHandler = static function (\Exception $e) use ($kernel, $request, &$hasRun) {
113 if ($hasRun) {
114 throw $e;
115 }
116 $hasRun = true;
117 $kernel->terminateWithException($e, $request);
118 };
119 }
120 } elseif ($event instanceof ConsoleEvent && $app = $event->getCommand()->getApplication()) {
121 $output = $event->getOutput();
122 if ($output instanceof ConsoleOutputInterface) {
123 $output = $output->getErrorOutput();
124 }
125 $this->exceptionHandler = function ($e) use ($app, $output) {
126 $app->renderException($e, $output);
127 };
128 }
129 }
130 if ($this->exceptionHandler) {
131 if ($handler instanceof ErrorHandler) {
132 $h = $handler->setExceptionHandler('var_dump');
133 if (\is_array($h) && $h[0] instanceof ExceptionHandler) {
134 $handler->setExceptionHandler($h);
135 $handler = $h[0];
136 } else {
137 $handler->setExceptionHandler($this->exceptionHandler);
138 }
139 }
140 if ($handler instanceof ExceptionHandler) {
141 $handler->setHandler($this->exceptionHandler);
142 if (null !== $this->fileLinkFormat) {
143 $handler->setFileLinkFormat($this->fileLinkFormat);
144 }
145 }
146 $this->exceptionHandler = null;
147 }
148 }
149
150 public static function getSubscribedEvents()
151 {
152 $events = [KernelEvents::REQUEST => ['configure', 2048]];
153
154 if (\defined('Symfony\Component\Console\ConsoleEvents::COMMAND')) {
155 $events[ConsoleEvents::COMMAND] = ['configure', 2048];
156 }
157
158 return $events;
159 }
160 }
161