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@ -0,0 +1,347 @@
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<?php
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/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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declare(strict_types=1);
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namespace Friendica\Core\Logger\Handler;
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use Psr\Log\LoggerInterface;
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use Psr\Log\LogLevel;
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use Throwable;
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/**
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* A facility to enable logging of runtime errors, exceptions and fatal errors.
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*
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* Quick setup: <code>ErrorHandler::register($logger);</code>
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*/
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class ErrorHandler
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{
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/** @var LoggerInterface */
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private $logger;
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/** @var ?callable */
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private $previousExceptionHandler = null;
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/** @var array<class-string, LogLevel::*> an array of class name to LogLevel::* constant mapping */
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private $uncaughtExceptionLevelMap = [];
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/** @var callable|true|null */
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private $previousErrorHandler = null;
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/** @var array<int, LogLevel::*> an array of E_* constant to LogLevel::* constant mapping */
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private $errorLevelMap = [];
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/** @var bool */
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private $handleOnlyReportedErrors = true;
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/** @var bool */
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private $hasFatalErrorHandler = false;
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/** @var LogLevel::* */
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private $fatalLevel = LogLevel::ALERT;
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/** @var ?string */
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private $reservedMemory = null;
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/** @var ?mixed */
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private $lastFatalTrace;
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/** @var int[] */
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private static $fatalErrors = [E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR, E_USER_ERROR];
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public function __construct(LoggerInterface $logger)
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{
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$this->logger = $logger;
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}
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/**
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* Registers a new ErrorHandler for a given Logger
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*
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* By default it will handle errors, exceptions and fatal errors
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*
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* @param LoggerInterface $logger
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* @param array<int, LogLevel::*>|false $errorLevelMap an array of E_* constant to LogLevel::* constant mapping, or false to disable error handling
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* @param array<class-string, LogLevel::*>|false $exceptionLevelMap an array of class name to LogLevel::* constant mapping, or false to disable exception handling
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* @param LogLevel::*|null|false $fatalLevel a LogLevel::* constant, null to use the default LogLevel::ALERT or false to disable fatal error handling
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*
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* @return ErrorHandler
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*/
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public static function register(LoggerInterface $logger, $errorLevelMap = [], $exceptionLevelMap = [], $fatalLevel = null): self
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{
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/** @phpstan-ignore-next-line */
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$handler = new static($logger);
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if ($errorLevelMap !== false) {
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$handler->registerErrorHandler($errorLevelMap);
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}
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if ($exceptionLevelMap !== false) {
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$handler->registerExceptionHandler($exceptionLevelMap);
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}
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if ($fatalLevel !== false) {
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$handler->registerFatalHandler($fatalLevel);
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}
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return $handler;
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}
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/**
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* Stringify the class of the given object for logging purpose
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*
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* @param object $object An object to retrieve the class
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*
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* @return string the classname of the object
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*/
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public static function getClass(object $object): string
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{
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$class = \get_class($object);
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if (false === ($pos = \strpos($class, "@anonymous\0"))) {
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return $class;
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}
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if (false === ($parent = \get_parent_class($class))) {
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return \substr($class, 0, $pos + 10);
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}
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return $parent . '@anonymous';
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}
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/**
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* @param array<class-string, LogLevel::*> $levelMap an array of class name to LogLevel::* constant mapping
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* @param bool $callPrevious Set to true, if a previously defined exception handler should be called after handling this exception
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*
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* @return $this
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*/
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public function registerExceptionHandler(array $levelMap = [], bool $callPrevious = true): self
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{
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$prev = set_exception_handler(function (Throwable $e): void {
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$this->handleException($e);
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});
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$this->uncaughtExceptionLevelMap = $levelMap;
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foreach ($this->defaultExceptionLevelMap() as $class => $level) {
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if (!isset($this->uncaughtExceptionLevelMap[$class])) {
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$this->uncaughtExceptionLevelMap[$class] = $level;
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}
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}
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if ($callPrevious && $prev) {
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$this->previousExceptionHandler = $prev;
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}
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return $this;
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}
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/**
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* @param array<int, LogLevel::*> $levelMap an array of E_* constant to LogLevel::* constant mapping
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* @param bool $callPrevious Set to true, if a previously defined exception handler should be called after handling this exception
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* @param int $errorTypes a Mask for masking the errortypes, which should be handled by this error handler
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* @param bool $handleOnlyReportedErrors Set to true, only errors set per error_reporting() will be logged
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*
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* @return $this
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*/
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public function registerErrorHandler(array $levelMap = [], bool $callPrevious = true, int $errorTypes = -1, bool $handleOnlyReportedErrors = true): self
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{
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$prev = set_error_handler([$this, 'handleError'], $errorTypes);
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$this->errorLevelMap = array_replace($this->defaultErrorLevelMap(), $levelMap);
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if ($callPrevious) {
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$this->previousErrorHandler = $prev ?: true;
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} else {
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$this->previousErrorHandler = null;
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}
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$this->handleOnlyReportedErrors = $handleOnlyReportedErrors;
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return $this;
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}
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/**
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* @param LogLevel::*|null $level a LogLevel::* constant, null to use the default LogLevel::ALERT
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* @param int $reservedMemorySize Amount of KBs to reserve in memory so that it can be freed when handling fatal errors giving Monolog some room in memory to get its job done
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*
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* @return $this
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*/
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public function registerFatalHandler($level = null, int $reservedMemorySize = 20): self
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{
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register_shutdown_function([$this, 'handleFatalError']);
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$this->reservedMemory = str_repeat(' ', 1024 * $reservedMemorySize);
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$this->fatalLevel = null === $level ? LogLevel::ALERT : $level;
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$this->hasFatalErrorHandler = true;
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return $this;
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}
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/**
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* @return array<class-string, LogLevel::*>
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*/
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protected function defaultExceptionLevelMap(): array
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{
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return [
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'ParseError' => LogLevel::CRITICAL,
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'Throwable' => LogLevel::ERROR,
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];
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}
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/**
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* @return array<int, LogLevel::*>
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*/
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protected function defaultErrorLevelMap(): array
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{
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return [
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E_ERROR => LogLevel::CRITICAL,
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E_WARNING => LogLevel::WARNING,
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E_PARSE => LogLevel::ALERT,
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E_NOTICE => LogLevel::NOTICE,
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E_CORE_ERROR => LogLevel::CRITICAL,
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E_CORE_WARNING => LogLevel::WARNING,
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E_COMPILE_ERROR => LogLevel::ALERT,
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E_COMPILE_WARNING => LogLevel::WARNING,
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E_USER_ERROR => LogLevel::ERROR,
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E_USER_WARNING => LogLevel::WARNING,
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E_USER_NOTICE => LogLevel::NOTICE,
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E_STRICT => LogLevel::NOTICE,
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E_RECOVERABLE_ERROR => LogLevel::ERROR,
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E_DEPRECATED => LogLevel::NOTICE,
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E_USER_DEPRECATED => LogLevel::NOTICE,
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];
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}
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/**
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* The Exception handler
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*
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* @param Throwable $e The Exception to handle
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*/
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private function handleException(Throwable $e): void
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{
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$level = LogLevel::ERROR;
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foreach ($this->uncaughtExceptionLevelMap as $class => $candidate) {
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if ($e instanceof $class) {
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$level = $candidate;
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break;
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}
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}
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$this->logger->log(
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$level,
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sprintf('Uncaught Exception %s: "%s" at %s line %s', self::getClass($e), $e->getMessage(), $e->getFile(), $e->getLine()),
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['exception' => $e]
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);
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if ($this->previousExceptionHandler) {
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($this->previousExceptionHandler)($e);
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}
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if (!headers_sent() && !ini_get('display_errors')) {
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http_response_code(500);
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}
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exit(255);
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}
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/**
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* The Error handler
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*
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* @private
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*
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* @param int $code The PHP error code
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* @param string $message The error message
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* @param string $file If possible, set the file at which the failure occurred
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* @param int $line
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* @param array|null $context If possible, add a context to the error for better analysis
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*
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* @return bool
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*/
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public function handleError(int $code, string $message, string $file = '', int $line = 0, ?array $context = []): bool
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{
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if ($this->handleOnlyReportedErrors && !(error_reporting() & $code)) {
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return false;
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}
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// fatal error codes are ignored if a fatal error handler is present as well to avoid duplicate log entries
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if (!$this->hasFatalErrorHandler || !in_array($code, self::$fatalErrors, true)) {
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$level = $this->errorLevelMap[$code] ?? LogLevel::CRITICAL;
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$this->logger->log($level, self::codeToString($code).': '.$message, ['code' => $code, 'message' => $message, 'file' => $file, 'line' => $line]);
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} else {
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$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
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array_shift($trace); // Exclude handleError from trace
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$this->lastFatalTrace = $trace;
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}
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if ($this->previousErrorHandler === true) {
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return false;
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} elseif ($this->previousErrorHandler) {
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return (bool) ($this->previousErrorHandler)($code, $message, $file, $line, $context);
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}
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return true;
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}
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/**
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* @private
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*/
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public function handleFatalError(): void
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{
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$this->reservedMemory = '';
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$lastError = error_get_last();
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if ($lastError && in_array($lastError['type'], self::$fatalErrors, true)) {
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$this->logger->log(
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$this->fatalLevel,
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'Fatal Error ('.self::codeToString($lastError['type']).'): '.$lastError['message'],
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['code' => $lastError['type'], 'message' => $lastError['message'], 'file' => $lastError['file'], 'line' => $lastError['line'], 'trace' => $this->lastFatalTrace]
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);
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}
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}
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/**
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* @param mixed $code
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*
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* @return string
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*/
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private static function codeToString($code): string
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{
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switch ($code) {
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case E_ERROR:
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return 'E_ERROR';
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case E_WARNING:
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return 'E_WARNING';
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case E_PARSE:
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return 'E_PARSE';
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case E_NOTICE:
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return 'E_NOTICE';
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case E_CORE_ERROR:
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return 'E_CORE_ERROR';
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case E_CORE_WARNING:
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return 'E_CORE_WARNING';
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case E_COMPILE_ERROR:
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return 'E_COMPILE_ERROR';
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case E_COMPILE_WARNING:
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return 'E_COMPILE_WARNING';
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case E_USER_ERROR:
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return 'E_USER_ERROR';
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case E_USER_WARNING:
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|
return 'E_USER_WARNING';
|
|
|
|
|
case E_USER_NOTICE:
|
|
|
|
|
return 'E_USER_NOTICE';
|
|
|
|
|
case E_STRICT:
|
|
|
|
|
return 'E_STRICT';
|
|
|
|
|
case E_RECOVERABLE_ERROR:
|
|
|
|
|
return 'E_RECOVERABLE_ERROR';
|
|
|
|
|
case E_DEPRECATED:
|
|
|
|
|
return 'E_DEPRECATED';
|
|
|
|
|
case E_USER_DEPRECATED:
|
|
|
|
|
return 'E_USER_DEPRECATED';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 'Unknown PHP error';
|
|
|
|
|
}
|
|
|
|
|
}
|