ErrorHandler::handle() - Code Metrics - Inspection of "Add grouping call stack items for vendor packages" - yiisoft/error-handler - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#36)

by Evgeniy

created 2021-03-03 11:22 UTC

ErrorHandler::handle() A

↳ Parent: ErrorHandler

Complexity

Conditions	4
Paths	8

Size

Total Lines	14
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	7
CRAP Score	4

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
eloc	7
c	1
b	0
f	0
dl	0
loc	14
ccs	7
cts	7
cp	1
rs	10
cc	4
nc	8
nop	3
crap	4

<?php

declare(strict_types=1);

namespace Yiisoft\ErrorHandler;

use Psr\Http\Message\ServerRequestInterface;
use Psr\Log\LoggerInterface;
use Throwable;
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 restore_error_handler;
use function restore_exception_handler;
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 LoggerInterface $logger;
    private ThrowableRendererInterface $defaultRenderer;

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

    /**
     * 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 this error handler.
     */
    public function register(): void
    {
        // 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 {
            $this->renderThrowableAndTerminate($t);
        });

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

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

        if ($this->memoryReserveSize > 0) {
            $this->memoryReserve = str_repeat('x', $this->memoryReserveSize);
        }

        // Handles fatal error.
        register_shutdown_function(function (): void {
            $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);
            }
        });
    }

    /**
     * Unregisters this error handler by restoring the PHP error and exception handlers.
     */
    public function unregister(): void
    {
        restore_error_handler();
        restore_exception_handler();
    }

    /**
     * Renders the throwable and terminates the script.
     *
     * @param Throwable $t
     */
    private function renderThrowableAndTerminate(Throwable $t): void
    {
        // 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);
        exit(1);

    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\ErrorHandler;
6
7		use Psr\Http\Message\ServerRequestInterface;
8		use Psr\Log\LoggerInterface;
9		use Throwable;
10		use Yiisoft\ErrorHandler\Exception\ErrorException;
11		use Yiisoft\ErrorHandler\Renderer\PlainTextRenderer;
12		use Yiisoft\Http\Status;
13
14		use function error_get_last;
15		use function error_reporting;
16		use function function_exists;
17		use function ini_set;
18		use function http_response_code;
19		use function register_shutdown_function;
20		use function restore_error_handler;
21		use function restore_exception_handler;
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
41		private LoggerInterface $logger;
42		private ThrowableRendererInterface $defaultRenderer;
43
44	17	public function __construct(LoggerInterface $logger, ThrowableRendererInterface $defaultRenderer)
45		{
46	17	$this->logger = $logger;
47	17	$this->defaultRenderer = $defaultRenderer;
48	17	}
49
50		/**
51		* Handles throwable and returns error data.
52		*
53		* @param Throwable $t
54		* @param ThrowableRendererInterface\|null $renderer
55		* @param ServerRequestInterface\|null $request
56		*
57		* @return ErrorData
58		*/
59	12	public function handle(
60		Throwable $t,
61		ThrowableRendererInterface $renderer = null,
62		ServerRequestInterface $request = null
63		): ErrorData {
64	12	if ($renderer === null) {
65	5	$renderer = $this->defaultRenderer;
66		}
67
68		try {
69	12	$this->logger->error((string) (new PlainTextRenderer())->renderVerbose($t, $request), ['throwable' => $t]);
70	12	return $this->debug ? $renderer->renderVerbose($t, $request) : $renderer->render($t, $request);
71	4	} catch (Throwable $t) {
72	4	return new ErrorData((string) $t);
73		}
74		}
75
76		/**
77		* Enables and disables debug mode.
78		*
79		* Ensure that is is disabled in production environment since debug mode exposes sensitive details.
80		*
81		* @param bool $enable Enable/disable debugging mode.
82		*/
83	2	public function debug(bool $enable = true): void
84		{
85	2	$this->debug = $enable;
86	2	}
87
88		/**
89		* Sets the size of the reserved memory.
90		*
91		* @param int $size The size of the reserved memory.
92		*
93		* @see $memoryReserveSize
94		*/
95	6	public function memoryReserveSize(int $size): void
96		{
97	6	$this->memoryReserveSize = $size;
98	6	}
99
100		/**
101		* Register this error handler.
102		*/
103	2	public function register(): void
104		{
105		// Disables the display of error.
106	2	if (function_exists('ini_set')) {
107	2	ini_set('display_errors', '0');
108		}
109
110		// Handles throwable, echo output and exit.
111	2	set_exception_handler(function (Throwable $t): void {
112		$this->renderThrowableAndTerminate($t);
113	2	});
114
115		// Handles PHP execution errors such as warnings and notices.
116	2	set_error_handler(static function (int $severity, string $message, string $file, int $line): bool {
117	2	if (!(error_reporting() & $severity)) {
118		// This error code is not included in error_reporting.
119		return true;
120		}
121
122	2	throw new ErrorException($message, $severity, $severity, $file, $line);
123	2	});
124
125	2	if ($this->memoryReserveSize > 0) {
126		$this->memoryReserve = str_repeat('x', $this->memoryReserveSize);
127		}
128
129		// Handles fatal error.
130	2	register_shutdown_function(function (): void {
131		$this->memoryReserve = '';
132		$e = error_get_last();
133
134		if ($e !== null && ErrorException::isFatalError($e)) {
135		$error = new ErrorException($e['message'], $e['type'], $e['type'], $e['file'], $e['line']);
136		$this->renderThrowableAndTerminate($error);
137		}
138	2	});
139	2	}
140
141		/**
142		* Unregisters this error handler by restoring the PHP error and exception handlers.
143		*/
144	1	public function unregister(): void
145		{
146	1	restore_error_handler();
147	1	restore_exception_handler();
148	1	}
149
150		/**
151		* Renders the throwable and terminates the script.
152		*
153		* @param Throwable $t
154		*/
155		private function renderThrowableAndTerminate(Throwable $t): void
156		{
157		// disable error capturing to avoid recursive errors while handling exceptions
158		$this->unregister();
159		// set preventive HTTP status code to 500 in case error handling somehow fails and headers are sent
160		http_response_code(Status::INTERNAL_SERVER_ERROR);
161
162		echo $this->handle($t);
163		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...
164		}
165		}
166

yiisoft / error-handler

Pull Request — master (#36)

ErrorHandler::handle() A

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