ErrorHandler::errorHtml() - Code Metrics - Inspection of "typos" - oscarotero/psr7-middlewares - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 01eb59...230b2e )

by Oscar

created 2016-04-18 23:04 UTC

ErrorHandler::errorHtml() A

↳ Parent: ErrorHandler

Complexity

Conditions	1
Paths	1

Size

Total Lines	18
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	18
rs	9.4285
cc	1
eloc	7
nc	1
nop	2

<?php

namespace Psr7Middlewares\Middleware;

use Psr7Middlewares\Utils;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;

/**
 * Middleware to handle php errors and exceptions.
 */
class ErrorHandler
{
    const KEY = 'EXCEPTION';

    use Utils\CallableTrait;
    use Utils\AttributeTrait;

    /**
     * @var callable|string The handler used
     */
    private $handler;

    /**
     * @var bool Whether or not catch exceptions
     */
    private $catchExceptions = false;

    /**
     * Returns the exception throwed.
     *
     * @param ServerRequestInterface $request
     *
     * @return \Exception|null
     */
    public static function getException(ServerRequestInterface $request)
    {
        return self::getAttribute($request, self::KEY);
    }

    /**
     * Constructor.
     *
     * @param callable|string|null $handler
     */
    public function __construct($handler = null)
    {
        $this->handler = $handler;
    }

    /**
     * Configure the catchExceptions.
     *
     * @param bool $catch
     *
     * @return self
     */
    public function catchExceptions($catch = true)
    {
        $this->catchExceptions = (boolean) $catch;

        return $this;
    }

    /**
     * Execute the middleware.
     *
     * @param ServerRequestInterface $request
     * @param ResponseInterface      $response
     * @param callable               $next
     *
     * @return ResponseInterface
     */
    public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $next)
    {
        ob_start();
        $level = ob_get_level();

        try {
            $response = $next($request, $response);
        } catch (\Throwable $exception) {

            if (!$this->catchExceptions) {
                throw $exception;
            }

            $request = self::setAttribute($request, self::KEY, $exception);
            $response = $response->withStatus(500);
        } catch (\Exception $exception) {
            if (!$this->catchExceptions) {
                throw $exception;
            }

            $request = self::setAttribute($request, self::KEY, $exception);
            $response = $response->withStatus(500);
        } finally {
            Utils\Helpers::getOutput($level);
        }

        if ($response->getStatusCode() >= 400 && $response->getStatusCode() < 600) {
            $callable = $this->handler ?: [$this, 'defaultHandler'];

            return $this->executeCallable($callable, $request, $response);
        }

        return $response;
    }

    /**
     * Default handler.
     * 
     * @param ServerRequestInterface $request
     * @param ResponseInterface      $response
     * 
     * @return string
     */
    private function defaultHandler(ServerRequestInterface $request, ResponseInterface $response)
    {
        $statusCode = $response->getStatusCode();
        $exception = self::getException($request);
        $message = $exception ? $exception->getMessage() : '';

        switch (Utils\Helpers::getMimeType($response)) {
            case 'text/plain':
            case 'text/css':
            case 'text/javascript':
                return self::errorText($statusCode, $message);

            case 'image/jpeg':
                return self::errorImage($statusCode, $message, 'imagejpeg');

            case 'image/gif':
                return self::errorImage($statusCode, $message, 'imagegif');

            case 'image/png':
                return self::errorImage($statusCode, $message, 'imagepng');

            case 'image/svg+xml':
                return self::errorSvg($statusCode, $message);

            case 'application/json':
                return self::errorJson($statusCode, $message);

            case 'text/xml':
                return self::errorXml($statusCode, $message);

            default:
                return self::errorHtml($statusCode, $message);
        }
    }

    /**
     * Print the error as plain text.
     * 
     * @param int    $statusCode
     * @param string $message
     * 
     * @return string
     */
    private static function errorText($statusCode, $message)
    {
        return sprintf("Error %s\n%s", $statusCode, $message);
    }

    /**
     * Print the error as svg image.
     * 
     * @param int    $statusCode
     * @param string $message
     * 
     * @return string
     */
    private static function errorSvg($statusCode, $message)
    {
        return <<<EOT
<svg xmlns="http://www.w3.org/2000/svg" width="200" height="50" viewBox="0 0 200 50">
    <text x="20" y="30" font-family="sans-serif" title="{$message}">
        Error {$statusCode}
    </text>
</svg>
EOT;
    }

    /**
     * Print the error as html.
     * 
     * @param int    $statusCode
     * @param string $message
     * 
     * @return string
     */
    private static function errorHtml($statusCode, $message)
    {
        return <<<EOT
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>Error {$statusCode}</title>
    <style>html{font-family: sans-serif;}</style>
    <meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
    <h1>Error {$statusCode}</h1>
    {$message}
</body>
</html>
EOT;
    }

    /**
     * Print the error as image.
     * 
     * @param int    $statusCode
     * @param string $message
     * @param string $output
     * 
     * @return string
     */
    private static function errorImage($statusCode, $message, $output)
    {
        $size = 200;
        $image = imagecreatetruecolor($size, $size);
        $textColor = imagecolorallocate($image, 255, 255, 255);
        imagestring($image, 5, 10, 10, "Error {$statusCode}", $textColor);

        foreach (str_split($message, intval($size / 10)) as $line => $text) {
            imagestring($image, 5, 10, ($line * 18) + 28, $text, $textColor);
        }

        ob_start();
        $output($image);

        return ob_get_clean();
    }

    /**
     * Print the error as json.
     * 
     * @param int    $statusCode
     * @param string $message
     * 
     * @return string
     */
    private static function errorJson($statusCode, $message)
    {
        $output = ['error' => $statusCode];

        if (!empty($message)) {
            $output['message'] = $message;
        }

        return json_encode($output);
    }

    /**
     * Print the error as xml.
     * 
     * @param int    $statusCode
     * @param string $message
     * 
     * @return string
     */
    private static function errorXml($statusCode, $message)
    {
        return <<<EOT
<?xml version="1.0" encoding="UTF-8"?>
<error>
    <code>{$statusCode}</code>
    <message>{$message}</message>
</error>
EOT;
    }
}


1			<?php
2
3			namespace Psr7Middlewares\Middleware;
4
5			use Psr7Middlewares\Utils;
6			use Psr\Http\Message\ServerRequestInterface;
7			use Psr\Http\Message\ResponseInterface;
8
9			/**
10			* Middleware to handle php errors and exceptions.
11			*/
12			class ErrorHandler
13			{
14			const KEY = 'EXCEPTION';
15
16			use Utils\CallableTrait;
17			use Utils\AttributeTrait;
18
19			/**
20			* @var callable\|string The handler used
21			*/
22			private $handler;
23
24			/**
25			* @var bool Whether or not catch exceptions
26			*/
27			private $catchExceptions = false;
28
29			/**
30			* Returns the exception throwed.
31			*
32			* @param ServerRequestInterface $request
33			*
34			* @return \Exception\|null
35			*/
36			public static function getException(ServerRequestInterface $request)
37			{
38			return self::getAttribute($request, self::KEY);
39			}
40
41			/**
42			* Constructor.
43			*
44			* @param callable\|string\|null $handler
45			*/
46			public function __construct($handler = null)
47			{
48			$this->handler = $handler;
49			}
50
51			/**
52			* Configure the catchExceptions.
53			*
54			* @param bool $catch
55			*
56			* @return self
57			*/
58			public function catchExceptions($catch = true)
59			{
60			$this->catchExceptions = (boolean) $catch;
61
62			return $this;
63			}
64
65			/**
66			* Execute the middleware.
67			*
68			* @param ServerRequestInterface $request
69			* @param ResponseInterface $response
70			* @param callable $next
71			*
72			* @return ResponseInterface
73			*/
74			public function __invoke(ServerRequestInterface $request, ResponseInterface $response, callable $next)
75			{
76			ob_start();
77			$level = ob_get_level();
78
79			try {
80			$response = $next($request, $response);
81			} catch (\Throwable $exception) {
			0 ignored issues – show Bug introduced 2016-03-01 11:14 UTC by Report Bug Copy Issue Report The class `Throwable` does not exist. Did you forget a USE statement, or did you not list all dependencies? Scrutinizer analyzes your `composer.json`/`composer.lock` file if available to determine the classes, and functions that are defined by your dependencies. It seems like the listed class was neither found in your dependencies, nor was it found in the analyzed files in your repository. If you are using some other form of dependency management, you might want to disable this analysis. Loading history...
82			if (!$this->catchExceptions) {
83			throw $exception;
84			}
85
86			$request = self::setAttribute($request, self::KEY, $exception);
87			$response = $response->withStatus(500);
88			} catch (\Exception $exception) {
89			if (!$this->catchExceptions) {
90			throw $exception;
91			}
92
93			$request = self::setAttribute($request, self::KEY, $exception);
94			$response = $response->withStatus(500);
95			} finally {
96			Utils\Helpers::getOutput($level);
97			}
98
99			if ($response->getStatusCode() >= 400 && $response->getStatusCode() < 600) {
100			$callable = $this->handler ?: [$this, 'defaultHandler'];
101
102			return $this->executeCallable($callable, $request, $response);
103			}
104
105			return $response;
106			}
107
108			/**
109			* Default handler.
110			*
111			* @param ServerRequestInterface $request
112			* @param ResponseInterface $response
113			*
114			* @return string
115			*/
116			private function defaultHandler(ServerRequestInterface $request, ResponseInterface $response)
117			{
118			$statusCode = $response->getStatusCode();
119			$exception = self::getException($request);
120			$message = $exception ? $exception->getMessage() : '';
121
122			switch (Utils\Helpers::getMimeType($response)) {
123			case 'text/plain':
124			case 'text/css':
125			case 'text/javascript':
126			return self::errorText($statusCode, $message);
127
128			case 'image/jpeg':
129			return self::errorImage($statusCode, $message, 'imagejpeg');
130
131			case 'image/gif':
132			return self::errorImage($statusCode, $message, 'imagegif');
133
134			case 'image/png':
135			return self::errorImage($statusCode, $message, 'imagepng');
136
137			case 'image/svg+xml':
138			return self::errorSvg($statusCode, $message);
139
140			case 'application/json':
141			return self::errorJson($statusCode, $message);
142
143			case 'text/xml':
144			return self::errorXml($statusCode, $message);
145
146			default:
147			return self::errorHtml($statusCode, $message);
148			}
149			}
150
151			/**
152			* Print the error as plain text.
153			*
154			* @param int $statusCode
155			* @param string $message
156			*
157			* @return string
158			*/
159			private static function errorText($statusCode, $message)
160			{
161			return sprintf("Error %s\n%s", $statusCode, $message);
162			}
163
164			/**
165			* Print the error as svg image.
166			*
167			* @param int $statusCode
168			* @param string $message
169			*
170			* @return string
171			*/
172			private static function errorSvg($statusCode, $message)
173			{
174			return <<<EOT
175			<svg xmlns="http://www.w3.org/2000/svg" width="200" height="50" viewBox="0 0 200 50">
176			<text x="20" y="30" font-family="sans-serif" title="{$message}">
177			Error {$statusCode}
178			</text>
179			</svg>
180			EOT;
181			}
182
183			/**
184			* Print the error as html.
185			*
186			* @param int $statusCode
187			* @param string $message
188			*
189			* @return string
190			*/
191			private static function errorHtml($statusCode, $message)
192			{
193			return <<<EOT
194			<!DOCTYPE html>
195			<html>
196			<head>
197			<meta charset="utf-8">
198			<title>Error {$statusCode}</title>
199			<style>html{font-family: sans-serif;}</style>
200			<meta name="viewport" content="width=device-width, initial-scale=1">
201			</head>
202			<body>
203			<h1>Error {$statusCode}</h1>
204			{$message}
205			</body>
206			</html>
207			EOT;
208			}
209
210			/**
211			* Print the error as image.
212			*
213			* @param int $statusCode
214			* @param string $message
215			* @param string $output
216			*
217			* @return string
218			*/
219			private static function errorImage($statusCode, $message, $output)
220			{
221			$size = 200;
222			$image = imagecreatetruecolor($size, $size);
223			$textColor = imagecolorallocate($image, 255, 255, 255);
224			imagestring($image, 5, 10, 10, "Error {$statusCode}", $textColor);
225
226			foreach (str_split($message, intval($size / 10)) as $line => $text) {
227			imagestring($image, 5, 10, ($line * 18) + 28, $text, $textColor);
228			}
229
230			ob_start();
231			$output($image);
232
233			return ob_get_clean();
234			}
235
236			/**
237			* Print the error as json.
238			*
239			* @param int $statusCode
240			* @param string $message
241			*
242			* @return string
243			*/
244			private static function errorJson($statusCode, $message)
245			{
246			$output = ['error' => $statusCode];
247
248			if (!empty($message)) {
249			$output['message'] = $message;
250			}
251
252			return json_encode($output);
253			}
254
255			/**
256			* Print the error as xml.
257			*
258			* @param int $statusCode
259			* @param string $message
260			*
261			* @return string
262			*/
263			private static function errorXml($statusCode, $message)
264			{
265			return <<<EOT
266			<?xml version="1.0" encoding="UTF-8"?>
267			<error>
268			<code>{$statusCode}</code>
269			<message>{$message}</message>
270			</error>
271			EOT;
272			}
273			}
274

oscarotero / psr7-middlewares

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ErrorHandler::errorHtml() A

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