ErrorHandler::initializeHandlers() - Code Metrics - Inspection of "Fix duplicate registration handlers" - yiisoft/error-handler - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#70)

by Sergei

created 2023-01-23 07:55 UTC

ErrorHandler::initializeHandlers() B

↳ Parent: ErrorHandler

Complexity

Conditions	11
Paths	5

Size

Total Lines	48
Code Lines	22

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	14
CRAP Score	22.8932

Importance

Changes	1
Bugs	1	Features	0

Metric	Value
eloc	22
c	1
b	1
f	0
dl	0
loc	48
ccs	14
cts	26
cp	0.5385
rs	7.3166
cc	11
nc	5
nop	0
crap	22.8932

How to fix Complexity

<?php

declare(strict_types=1);

namespace Yiisoft\ErrorHandler;

use Psr\EventDispatcher\EventDispatcherInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Log\LoggerInterface;
use Throwable;
use Yiisoft\ErrorHandler\Event\ApplicationError;
use Yiisoft\ErrorHandler\Exception\ErrorException;
use Yiisoft\ErrorHandler\Renderer\PlainTextRenderer;
use Yiisoft\Http\Status;

use function error_get_last;
use function error_reporting;
use function function_exists;
use function ini_set;
use function http_response_code;
use function register_shutdown_function;
use function set_error_handler;
use function set_exception_handler;
use function str_repeat;

/**
 * `ErrorHandler` handles out of memory errors, fatals, warnings, notices and exceptions.
 */
final class ErrorHandler
{
    /**
     * @var int The size of the reserved memory. A portion of memory is pre-allocated so that
     * when an out-of-memory issue occurs, the error handler is able to handle the error with
     * the help of this reserved memory. If you set this value to be 0, no memory will be reserved.
     * Defaults to 256KB.
     */
    private int $memoryReserveSize = 262_144;

    private string $memoryReserve = '';
    private bool $debug = false;
    private ?string $workingDirectory = null;
    private bool $enabled = false;
    private bool $isHandlersInitialized = false;

    private LoggerInterface $logger;
    private ThrowableRendererInterface $defaultRenderer;
    private ?EventDispatcherInterface $eventDispatcher;

    public function __construct(
        LoggerInterface $logger,
        ThrowableRendererInterface $defaultRenderer,
        EventDispatcherInterface $eventDispatcher = null
    ) {
        $this->logger = $logger;
        $this->defaultRenderer = $defaultRenderer;
        $this->eventDispatcher = $eventDispatcher;
    }

    /**
     * Handles throwable and returns error data.
     *
     * @param Throwable $t
     * @param ThrowableRendererInterface|null $renderer
     * @param ServerRequestInterface|null $request
     *
     * @return ErrorData
     */
    public function handle(
        Throwable $t,
        ThrowableRendererInterface $renderer = null,
        ServerRequestInterface $request = null
    ): ErrorData {
        if ($renderer === null) {
            $renderer = $this->defaultRenderer;
        }

        try {
            $this->logger->error((string) (new PlainTextRenderer())->renderVerbose($t, $request), ['throwable' => $t]);
            return $this->debug ? $renderer->renderVerbose($t, $request) : $renderer->render($t, $request);
        } catch (Throwable $t) {
            return new ErrorData((string) $t);
        }
    }

    /**
     * Enables and disables debug mode.
     *
     * Ensure that is is disabled in production environment since debug mode exposes sensitive details.
     *
     * @param bool $enable Enable/disable debugging mode.
     */
    public function debug(bool $enable = true): void
    {
        $this->debug = $enable;
    }

    /**
     * Sets the size of the reserved memory.
     *
     * @param int $size The size of the reserved memory.
     *
     * @see $memoryReserveSize
     */
    public function memoryReserveSize(int $size): void
    {
        $this->memoryReserveSize = $size;
    }

    /**
     * Register PHP exception and error handlers once and enable this error handler.
     */
    public function register(): void
    {
        if ($this->memoryReserveSize > 0) {
            $this->memoryReserve = str_repeat('x', $this->memoryReserveSize);
        }

        $this->initializeHandlers();

        $this->enabled = true;
    }

    /**
     * Disable this error handler.
     */
    public function unregister(): void
    {
        $this->memoryReserve = '';

        $this->enabled = false;
    }

    private function initializeHandlers(): void
    {
        if ($this->isHandlersInitialized) {
            return;
        }

        // Disables the display of error.
        if (function_exists('ini_set')) {
            ini_set('display_errors', '0');
        }

        // Handles throwable, echo output and exit.
        set_exception_handler(function (Throwable $t): void {
            if ($this->enabled) {
                $this->renderThrowableAndTerminate($t);
            }
        });

        // Handles PHP execution errors such as warnings and notices.
        set_error_handler(function (int $severity, string $message, string $file, int $line): bool {
            if (!$this->enabled || !(error_reporting() & $severity)) {
                // This error code is not included in error_reporting.
                return true;
            }

            throw new ErrorException($message, $severity, $severity, $file, $line);
        });

        // Handles fatal error.
        register_shutdown_function(function (): void {
            if (!$this->enabled) {
                return;
            }

            $this->memoryReserve = '';
            $e = error_get_last();

            if ($e !== null && ErrorException::isFatalError($e)) {
                $error = new ErrorException($e['message'], $e['type'], $e['type'], $e['file'], $e['line']);
                $this->renderThrowableAndTerminate($error);
            }
        });

        if (!(PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg')) {
            $this->workingDirectory = getcwd();
        }

        $this->isHandlersInitialized = true;
    }

    /**
     * Renders the throwable and terminates the script.
     *
     * @param Throwable $t
     */
    private function renderThrowableAndTerminate(Throwable $t): void
    {
        if (!empty($this->workingDirectory)) {
            chdir($this->workingDirectory);
        }
        // disable error capturing to avoid recursive errors while handling exceptions
        $this->unregister();
        // set preventive HTTP status code to 500 in case error handling somehow fails and headers are sent
        http_response_code(Status::INTERNAL_SERVER_ERROR);

        echo $this->handle($t);
        if ($this->eventDispatcher !== null) {
            $this->eventDispatcher->dispatch(new ApplicationError($t));
        }

        register_shutdown_function(static function (): void {
            exit(1);

        });
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\ErrorHandler;
6
7		use Psr\EventDispatcher\EventDispatcherInterface;
8		use Psr\Http\Message\ServerRequestInterface;
9		use Psr\Log\LoggerInterface;
10		use Throwable;
11		use Yiisoft\ErrorHandler\Event\ApplicationError;
12		use Yiisoft\ErrorHandler\Exception\ErrorException;
13		use Yiisoft\ErrorHandler\Renderer\PlainTextRenderer;
14		use Yiisoft\Http\Status;
15
16		use function error_get_last;
17		use function error_reporting;
18		use function function_exists;
19		use function ini_set;
20		use function http_response_code;
21		use function register_shutdown_function;
22		use function set_error_handler;
23		use function set_exception_handler;
24		use function str_repeat;
25
26		/**
27		* `ErrorHandler` handles out of memory errors, fatals, warnings, notices and exceptions.
28		*/
29		final class ErrorHandler
30		{
31		/**
32		* @var int The size of the reserved memory. A portion of memory is pre-allocated so that
33		* when an out-of-memory issue occurs, the error handler is able to handle the error with
34		* the help of this reserved memory. If you set this value to be 0, no memory will be reserved.
35		* Defaults to 256KB.
36		*/
37		private int $memoryReserveSize = 262_144;
		0 ignored issues – show Bug introduced 2020-11-04 17:46 UTC by Report Bug Copy Issue Report The constant `Yiisoft\ErrorHandler\262_144` was not found. Maybe you did not declare it correctly or list all dependencies? Loading history...
38		private string $memoryReserve = '';
39		private bool $debug = false;
40		private ?string $workingDirectory = null;
41		private bool $enabled = false;
42		private bool $isHandlersInitialized = false;
43
44		private LoggerInterface $logger;
45		private ThrowableRendererInterface $defaultRenderer;
46		private ?EventDispatcherInterface $eventDispatcher;
47
48	17	public function __construct(
49		LoggerInterface $logger,
50		ThrowableRendererInterface $defaultRenderer,
51		EventDispatcherInterface $eventDispatcher = null
52		) {
53	17	$this->logger = $logger;
54	17	$this->defaultRenderer = $defaultRenderer;
55	17	$this->eventDispatcher = $eventDispatcher;
56		}
57
58		/**
59		* Handles throwable and returns error data.
60		*
61		* @param Throwable $t
62		* @param ThrowableRendererInterface\|null $renderer
63		* @param ServerRequestInterface\|null $request
64		*
65		* @return ErrorData
66		*/
67	12	public function handle(
68		Throwable $t,
69		ThrowableRendererInterface $renderer = null,
70		ServerRequestInterface $request = null
71		): ErrorData {
72	12	if ($renderer === null) {
73	5	$renderer = $this->defaultRenderer;
74		}
75
76		try {
77	12	$this->logger->error((string) (new PlainTextRenderer())->renderVerbose($t, $request), ['throwable' => $t]);
78	12	return $this->debug ? $renderer->renderVerbose($t, $request) : $renderer->render($t, $request);
79	4	} catch (Throwable $t) {
80	4	return new ErrorData((string) $t);
81		}
82		}
83
84		/**
85		* Enables and disables debug mode.
86		*
87		* Ensure that is is disabled in production environment since debug mode exposes sensitive details.
88		*
89		* @param bool $enable Enable/disable debugging mode.
90		*/
91	2	public function debug(bool $enable = true): void
92		{
93	2	$this->debug = $enable;
94		}
95
96		/**
97		* Sets the size of the reserved memory.
98		*
99		* @param int $size The size of the reserved memory.
100		*
101		* @see $memoryReserveSize
102		*/
103	6	public function memoryReserveSize(int $size): void
104		{
105	6	$this->memoryReserveSize = $size;
106		}
107
108		/**
109		* Register PHP exception and error handlers once and enable this error handler.
110		*/
111	2	public function register(): void
112		{
113	2	if ($this->memoryReserveSize > 0) {
114		$this->memoryReserve = str_repeat('x', $this->memoryReserveSize);
115		}
116
117	2	$this->initializeHandlers();
118
119	2	$this->enabled = true;
120		}
121
122		/**
123		* Disable this error handler.
124		*/
125	1	public function unregister(): void
126		{
127	1	$this->memoryReserve = '';
128
129	1	$this->enabled = false;
130		}
131
132	2	private function initializeHandlers(): void
133		{
134	2	if ($this->isHandlersInitialized) {
135		return;
136		}
137
138		// Disables the display of error.
139	2	if (function_exists('ini_set')) {
140	2	ini_set('display_errors', '0');
141		}
142
143		// Handles throwable, echo output and exit.
144	2	set_exception_handler(function (Throwable $t): void {
145		if ($this->enabled) {
146		$this->renderThrowableAndTerminate($t);
147		}
148	2	});
149
150		// Handles PHP execution errors such as warnings and notices.
151	2	set_error_handler(function (int $severity, string $message, string $file, int $line): bool {
152	2	if (!$this->enabled \|\| !(error_reporting() & $severity)) {
153		// This error code is not included in error_reporting.
154		return true;
155		}
156
157	2	throw new ErrorException($message, $severity, $severity, $file, $line);
158	2	});
159
160		// Handles fatal error.
161	2	register_shutdown_function(function (): void {
162		if (!$this->enabled) {
163		return;
164		}
165
166		$this->memoryReserve = '';
167		$e = error_get_last();
168
169		if ($e !== null && ErrorException::isFatalError($e)) {
170		$error = new ErrorException($e['message'], $e['type'], $e['type'], $e['file'], $e['line']);
171		$this->renderThrowableAndTerminate($error);
172		}
173	2	});
174
175	2	if (!(PHP_SAPI === 'cli' \|\| PHP_SAPI === 'phpdbg')) {
176		$this->workingDirectory = getcwd();
177		}
178
179	2	$this->isHandlersInitialized = true;
180		}
181
182		/**
183		* Renders the throwable and terminates the script.
184		*
185		* @param Throwable $t
186		*/
187		private function renderThrowableAndTerminate(Throwable $t): void
188		{
189		if (!empty($this->workingDirectory)) {
190		chdir($this->workingDirectory);
191		}
192		// disable error capturing to avoid recursive errors while handling exceptions
193		$this->unregister();
194		// set preventive HTTP status code to 500 in case error handling somehow fails and headers are sent
195		http_response_code(Status::INTERNAL_SERVER_ERROR);
196
197		echo $this->handle($t);
198		if ($this->eventDispatcher !== null) {
199		$this->eventDispatcher->dispatch(new ApplicationError($t));
200		}
201
202		register_shutdown_function(static function (): void {
203		exit(1);
		0 ignored issues – show Best Practice introduced 2020-11-04 17:46 UTC by Report Bug Copy Issue Report Using `exit` here is not recommended. In general, usage of exit should be done with care and only when running in a scripting context like a CLI script. Loading history...
204		});
205		}
206		}
207

yiisoft / error-handler

Pull Request — master (#70)

ErrorHandler::initializeHandlers() B

Complexity

Size

Duplication

Code Coverage

Importance

How to fix Complexity

Long Method

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