HTTPResponse - Code Metrics - Inspection of "Rename SS_ prefixed classes (#5974)" - silverstripe/silverstripe-framework - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( f5d71d...bfd9cb )

by Sam

created 2016-09-09 06:43 UTC

HTTPResponse A

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	306
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	306
rs	9
wmc	35
lcom	1
cbo	4

15 Methods

Rating	Name	Size	Complexity
A	__construct()	6	2
A	setStatusCode()	14	3
A	setStatusDescription()	4	1
A	getStatusCode()	3	1
A	getStatusDescription()	3	1
A	isError()	3	3
A	setBody()	4	2
A	getBody()	3	1
A	addHeader()	4	1
A	getHeader()	6	2
A	getHeaders()	3	1
A	removeHeader()	4	1
A	redirect()	9	2
C	output()	58	13
A	isFinished()	3	1

<?php

namespace SilverStripe\Control;

use InvalidArgumentException;
use SilverStripe\Core\Convert;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\View\Requirements;

/**
 * Represents a response returned by a controller.
 */
class HTTPResponse {

	/**
	 * @var array
	 */
	protected static $status_codes = array(
		100 => 'Continue',
		101 => 'Switching Protocols',
		200 => 'OK',
		201 => 'Created',
		202 => 'Accepted',
		203 => 'Non-Authoritative Information',
		204 => 'No Content',
		205 => 'Reset Content',
		206 => 'Partial Content',
		301 => 'Moved Permanently',
		302 => 'Found',
		303 => 'See Other',
		304 => 'Not Modified',
		305 => 'Use Proxy',
		307 => 'Temporary Redirect',
		400 => 'Bad Request',
		401 => 'Unauthorized',
		403 => 'Forbidden',
		404 => 'Not Found',
		405 => 'Method Not Allowed',
		406 => 'Not Acceptable',
		407 => 'Proxy Authentication Required',
		408 => 'Request Timeout',
		409 => 'Conflict',
		410 => 'Gone',
		411 => 'Length Required',
		412 => 'Precondition Failed',
		413 => 'Request Entity Too Large',
		414 => 'Request-URI Too Long',
		415 => 'Unsupported Media Type',
		416 => 'Request Range Not Satisfiable',
		417 => 'Expectation Failed',
		422 => 'Unprocessable Entity',
		429 => 'Too Many Requests',
		500 => 'Internal Server Error',
		501 => 'Not Implemented',
		502 => 'Bad Gateway',
		503 => 'Service Unavailable',
		504 => 'Gateway Timeout',
		505 => 'HTTP Version Not Supported',
	);

	/**
	 * @var array
	 */
	protected static $redirect_codes = array(
		301,
		302,
		303,
		304,
		305,
		307
	);

	/**
	 * @var int
	 */
	protected $statusCode = 200;

	/**
	 * @var string
	 */
	protected $statusDescription = "OK";

	/**
	 * HTTP Headers like "Content-Type: text/xml"
	 *
	 * @see http://en.wikipedia.org/wiki/List_of_HTTP_headers
	 * @var array
	 */
	protected $headers = array(
		"Content-Type" => "text/html; charset=utf-8",
	);

	/**
	 * @var string
	 */
	protected $body = null;

	/**
	 * Create a new HTTP response
	 *
	 * @param string $body The body of the response
	 * @param int $statusCode The numeric status code - 200, 404, etc
	 * @param string $statusDescription The text to be given alongside the status code.
	 *  See {@link setStatusCode()} for more information.
	 */
	public function __construct($body = null, $statusCode = null, $statusDescription = null) {
		$this->setBody($body);
		if($statusCode) {
0   == false // true
0   == null  // true
123 == false // false
123 == null  // false

// It is often better to use strict comparison
0 === false // false
0 === null  // false
			$this->setStatusCode($statusCode, $statusDescription);
		}
	}

	/**
	 * @param string $code
	 * @param string $description Optional. See {@link setStatusDescription()}.
	 *  No newlines are allowed in the description.
	 *  If omitted, will default to the standard HTTP description
	 *  for the given $code value (see {@link $status_codes}).
	 * @return $this
	 */
	public function setStatusCode($code, $description = null) {
		if(isset(self::$status_codes[$code])) {
			$this->statusCode = $code;
$answer = 42;

$correct = false;

$correct = (bool) $answer;
		} else {
			throw new InvalidArgumentException("Unrecognised HTTP status code '$code'");
		}

		if($description) {
''   == false // true
''   == null  // true
'ab' == false // false
'ab' == null  // false

// It is often better to use strict comparison
'' === false // false
'' === null  // false
			$this->statusDescription = $description;
		} else {
			$this->statusDescription = self::$status_codes[$code];
		}
		return $this;
	}

	/**
	 * The text to be given alongside the status code ("reason phrase").
	 * Caution: Will be overwritten by {@link setStatusCode()}.
	 *
	 * @param string $description
	 * @return $this
	 */
	public function setStatusDescription($description) {
		$this->statusDescription = $description;
		return $this;
	}

	/**
	 * @return int
	 */
	public function getStatusCode() {
		return $this->statusCode;
	}

	/**
	 * @return string Description for a HTTP status code
	 */
	public function getStatusDescription() {
		return str_replace(array("\r","\n"), '', $this->statusDescription);
	}

	/**
	 * Returns true if this HTTP response is in error
	 *
	 * @return bool
	 */
	public function isError() {
		return $this->statusCode && ($this->statusCode < 200 || $this->statusCode > 399);
	}

	/**
	 * @param string $body
	 * @return $this
	 */
	public function setBody($body) {
		$this->body = $body ? (string) $body : $body; // Don't type-cast false-ish values, eg null is null not ''
		return $this;
	}

	/**
	 * @return string
	 */
	public function getBody() {
		return $this->body;
	}

	/**
	 * Add a HTTP header to the response, replacing any header of the same name.
	 *
	 * @param string $header Example: "Content-Type"
	 * @param string $value Example: "text/xml"
	 * @return $this
	 */
	public function addHeader($header, $value) {
		$this->headers[$header] = $value;
		return $this;
	}

	/**
	 * Return the HTTP header of the given name.
	 *
	 * @param string $header
	 * @returns string
	 */
	public function getHeader($header) {
		if(isset($this->headers[$header])) {
			return $this->headers[$header];
		}
		return null;
	}

	/**
	 * @return array
	 */
	public function getHeaders() {
		return $this->headers;
	}

	/**
	 * Remove an existing HTTP header by its name,
	 * e.g. "Content-Type".
	 *
	 * @param string $header
	 * @return $this
	 */
	public function removeHeader($header) {
		unset($this->headers[$header]);
		return $this;
	}

	/**
	 * @param string $dest
	 * @param int $code
	 * @return $this
	 */
	public function redirect($dest, $code = 302) {
		if(!in_array($code, self::$redirect_codes)) {
			trigger_error("Invalid HTTP redirect code {$code}", E_USER_WARNING);
			$code = 302;
		}
		$this->setStatusCode($code);
		$this->headers['Location'] = $dest;
		return $this;
	}

	/**
	 * Send this HTTPReponse to the browser
	 */
	public function output() {
// Bad
class Router
{
    public function generate($path)
    {
        return $_SERVER['HOST'].$path;
    }
}

// Better
class Router
{
    private $host;

    public function __construct($host)
    {
        $this->host = $host;
    }

    public function generate($path)
    {
        return $this->host.$path;
    }
}

class Controller
{
    public function myAction(Request $request)
    {
        // Instead of
        $page = isset($_GET['page']) ? intval($_GET['page']) : 1;

        // Better (assuming you use the Symfony2 request)
        $page = $request->query->get('page', 1);
    }
}
		// Attach appropriate X-Include-JavaScript and X-Include-CSS headers
		if(Director::is_ajax()) {
			Requirements::include_in_response($this);
		}

		if(in_array($this->statusCode, self::$redirect_codes) && headers_sent($file, $line)) {
			$url = Director::absoluteURL($this->headers['Location'], true);
			$urlATT = Convert::raw2htmlatt($url);
<?php

function getDate($date)
{
    if ($date !== null) {
        return new DateTime($date);
    }

    return false;
}
			$urlJS = Convert::raw2js($url);
<?php

function getDate($date)
{
    if ($date !== null) {
        return new DateTime($date);
    }

    return false;
}
			$title = Director::isDev()
				? "{$urlATT}... (output started on {$file}, line {$line})"
				: "{$urlATT}...";
			echo <<<EOT
<p>Redirecting to <a href="{$urlATT}" title="Click this link if your browser does not redirect you">{$title}</a></p>
<meta http-equiv="refresh" content="1; url={$urlATT}" />
<script type="application/javascript">setTimeout(function(){
	window.location.href = "{$urlJS}";
}, 50);</script>
EOT
			;
		} else {
			$line = $file = null;
			if(!headers_sent($file, $line)) {
				header($_SERVER['SERVER_PROTOCOL'] . " $this->statusCode " . $this->getStatusDescription());
				foreach($this->headers as $header => $value) {
					//etags need to be quoted
					if (strcasecmp('etag', $header) === 0 && 0 !== strpos($value, '"')) {
						$value = sprintf('"%s"', $value);
					}
					header("$header: $value", true, $this->statusCode);
				}
			} else {
				// It's critical that these status codes are sent; we need to report a failure if not.
				if($this->statusCode >= 300) {
					user_error(
						"Couldn't set response type to $this->statusCode because " .
						"of output on line $line of $file",
						E_USER_WARNING
					);
				}
			}

			// Only show error pages or generic "friendly" errors if the status code signifies
			// an error, and the response doesn't have any body yet that might contain
			// a more specific error description.
			if(Director::isLive() && $this->isError() && !$this->body) {
				$formatter = Injector::inst()->get('FriendlyErrorFormatter');
				echo $formatter->format(array(
					'code' => $this->statusCode
				));

			} else {
				echo $this->body;
			}

		}
	}

	/**
	 * Returns true if this response is "finished", that is, no more script execution should be done.
	 * Specifically, returns true if a redirect has already been requested
	 *
	 * @return bool
	 */
	public function isFinished() {
		return in_array($this->statusCode, array(301, 302, 303, 304, 305, 307, 401, 403));
	}

}


1			<?php
2
3			namespace SilverStripe\Control;
4
5			use InvalidArgumentException;
6			use SilverStripe\Core\Convert;
7			use SilverStripe\Core\Injector\Injector;
8			use SilverStripe\View\Requirements;
9
10			/**
11			* Represents a response returned by a controller.
12			*/
13			class HTTPResponse {
14
15			/**
16			* @var array
17			*/
18			protected static $status_codes = array(
19			100 => 'Continue',
20			101 => 'Switching Protocols',
21			200 => 'OK',
22			201 => 'Created',
23			202 => 'Accepted',
24			203 => 'Non-Authoritative Information',
25			204 => 'No Content',
26			205 => 'Reset Content',
27			206 => 'Partial Content',
28			301 => 'Moved Permanently',
29			302 => 'Found',
30			303 => 'See Other',
31			304 => 'Not Modified',
32			305 => 'Use Proxy',
33			307 => 'Temporary Redirect',
34			400 => 'Bad Request',
35			401 => 'Unauthorized',
36			403 => 'Forbidden',
37			404 => 'Not Found',
38			405 => 'Method Not Allowed',
39			406 => 'Not Acceptable',
40			407 => 'Proxy Authentication Required',
41			408 => 'Request Timeout',
42			409 => 'Conflict',
43			410 => 'Gone',
44			411 => 'Length Required',
45			412 => 'Precondition Failed',
46			413 => 'Request Entity Too Large',
47			414 => 'Request-URI Too Long',
48			415 => 'Unsupported Media Type',
49			416 => 'Request Range Not Satisfiable',
50			417 => 'Expectation Failed',
51			422 => 'Unprocessable Entity',
52			429 => 'Too Many Requests',
53			500 => 'Internal Server Error',
54			501 => 'Not Implemented',
55			502 => 'Bad Gateway',
56			503 => 'Service Unavailable',
57			504 => 'Gateway Timeout',
58			505 => 'HTTP Version Not Supported',
59			);
60
61			/**
62			* @var array
63			*/
64			protected static $redirect_codes = array(
65			301,
66			302,
67			303,
68			304,
69			305,
70			307
71			);
72
73			/**
74			* @var int
75			*/
76			protected $statusCode = 200;
77
78			/**
79			* @var string
80			*/
81			protected $statusDescription = "OK";
82
83			/**
84			* HTTP Headers like "Content-Type: text/xml"
85			*
86			* @see http://en.wikipedia.org/wiki/List_of_HTTP_headers
87			* @var array
88			*/
89			protected $headers = array(
90			"Content-Type" => "text/html; charset=utf-8",
91			);
92
93			/**
94			* @var string
95			*/
96			protected $body = null;
97
98			/**
99			* Create a new HTTP response
100			*
101			* @param string $body The body of the response
102			* @param int $statusCode The numeric status code - 200, 404, etc
103			* @param string $statusDescription The text to be given alongside the status code.
104			* See {@link setStatusCode()} for more information.
105			*/
106			public function __construct($body = null, $statusCode = null, $statusDescription = null) {
107			$this->setBody($body);
108			if($statusCode) {
			0 ignored issues – show Bug Best Practice introduced 2016-09-09 02:12 UTC by Report Bug Copy Issue Report The expression `$statusCode` of type `integer\|null` is loosely compared to `true`; this is ambiguous if the integer can be zero. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `integer` values, zero is a special case, in particular the following results might be unexpected: 0 == false // true 0 == null // true 123 == false // false 123 == null // false // It is often better to use strict comparison 0 === false // false 0 === null // false Loading history...
109			$this->setStatusCode($statusCode, $statusDescription);
110			}
111			}
112
113			/**
114			* @param string $code
115			* @param string $description Optional. See {@link setStatusDescription()}.
116			* No newlines are allowed in the description.
117			* If omitted, will default to the standard HTTP description
118			* for the given $code value (see {@link $status_codes}).
119			* @return $this
120			*/
121			public function setStatusCode($code, $description = null) {
122			if(isset(self::$status_codes[$code])) {
123			$this->statusCode = $code;
			0 ignored issues – show Documentation Bug introduced 2016-09-09 02:12 UTC by Report Bug Copy Issue Report The property `$statusCode` was declared of type `integer`, but `$code` is of type `string`. Maybe add a type cast? This check looks for assignments to scalar types that may be of the wrong type. To ensure the code behaves as expected, it may be a good idea to add an explicit type cast. $answer = 42; $correct = false; $correct = (bool) $answer; Loading history...
124			} else {
125			throw new InvalidArgumentException("Unrecognised HTTP status code '$code'");
126			}
127
128			if($description) {
			0 ignored issues – show Bug Best Practice introduced 2016-09-09 02:12 UTC by Report Bug Copy Issue Report The expression `$description` of type `string\|null` is loosely compared to `true`; this is ambiguous if the string can be empty. You might want to explicitly use `!== null` instead. In PHP, under loose comparison (like `==`, or `!=`, or `switch` conditions), values of different types might be equal. For `string` values, the empty string `''` is a special case, in particular the following results might be unexpected: '' == false // true '' == null // true 'ab' == false // false 'ab' == null // false // It is often better to use strict comparison '' === false // false '' === null // false Loading history...
129			$this->statusDescription = $description;
130			} else {
131			$this->statusDescription = self::$status_codes[$code];
132			}
133			return $this;
134			}
135
136			/**
137			* The text to be given alongside the status code ("reason phrase").
138			* Caution: Will be overwritten by {@link setStatusCode()}.
139			*
140			* @param string $description
141			* @return $this
142			*/
143			public function setStatusDescription($description) {
144			$this->statusDescription = $description;
145			return $this;
146			}
147
148			/**
149			* @return int
150			*/
151			public function getStatusCode() {
152			return $this->statusCode;
153			}
154
155			/**
156			* @return string Description for a HTTP status code
157			*/
158			public function getStatusDescription() {
159			return str_replace(array("\r","\n"), '', $this->statusDescription);
160			}
161
162			/**
163			* Returns true if this HTTP response is in error
164			*
165			* @return bool
166			*/
167			public function isError() {
168			return $this->statusCode && ($this->statusCode < 200 \|\| $this->statusCode > 399);
169			}
170
171			/**
172			* @param string $body
173			* @return $this
174			*/
175			public function setBody($body) {
176			$this->body = $body ? (string) $body : $body; // Don't type-cast false-ish values, eg null is null not ''
177			return $this;
178			}
179
180			/**
181			* @return string
182			*/
183			public function getBody() {
184			return $this->body;
185			}
186
187			/**
188			* Add a HTTP header to the response, replacing any header of the same name.
189			*
190			* @param string $header Example: "Content-Type"
191			* @param string $value Example: "text/xml"
192			* @return $this
193			*/
194			public function addHeader($header, $value) {
195			$this->headers[$header] = $value;
196			return $this;
197			}
198
199			/**
200			* Return the HTTP header of the given name.
201			*
202			* @param string $header
203			* @returns string
204			*/
205			public function getHeader($header) {
206			if(isset($this->headers[$header])) {
207			return $this->headers[$header];
208			}
209			return null;
210			}
211
212			/**
213			* @return array
214			*/
215			public function getHeaders() {
216			return $this->headers;
217			}
218
219			/**
220			* Remove an existing HTTP header by its name,
221			* e.g. "Content-Type".
222			*
223			* @param string $header
224			* @return $this
225			*/
226			public function removeHeader($header) {
227			unset($this->headers[$header]);
228			return $this;
229			}
230
231			/**
232			* @param string $dest
233			* @param int $code
234			* @return $this
235			*/
236			public function redirect($dest, $code = 302) {
237			if(!in_array($code, self::$redirect_codes)) {
238			trigger_error("Invalid HTTP redirect code {$code}", E_USER_WARNING);
239			$code = 302;
240			}
241			$this->setStatusCode($code);
242			$this->headers['Location'] = $dest;
243			return $this;
244			}
245
246			/**
247			* Send this HTTPReponse to the browser
248			*/
249			public function output() {
			0 ignored issues – show Coding Style introduced 2016-09-09 02:12 UTC by Report Bug Copy Issue Report `output` uses the super-global variable `$_SERVER` which is generally not recommended. Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable: // Bad class Router { public function generate($path) { return $_SERVER['HOST'].$path; } } // Better class Router { private $host; public function __construct($host) { $this->host = $host; } public function generate($path) { return $this->host.$path; } } class Controller { public function myAction(Request $request) { // Instead of $page = isset($_GET['page']) ? intval($_GET['page']) : 1; // Better (assuming you use the Symfony2 request) $page = $request->query->get('page', 1); } } Loading history...
250			// Attach appropriate X-Include-JavaScript and X-Include-CSS headers
251			if(Director::is_ajax()) {
252			Requirements::include_in_response($this);
253			}
254
255			if(in_array($this->statusCode, self::$redirect_codes) && headers_sent($file, $line)) {
256			$url = Director::absoluteURL($this->headers['Location'], true);
257			$urlATT = Convert::raw2htmlatt($url);
			0 ignored issues – show Security Bug introduced 2016-09-09 02:12 UTC by Report Bug Copy Issue Report It seems like `$url` defined by `\SilverStripe\Control\Di...ders['Location'], true)` on line `256` can also be of type `false`; however, `SilverStripe\Core\Convert::raw2htmlatt()` does only seem to accept `string\|array`, did you maybe forget to handle an error condition? This check looks for type mismatches where the missing type is `false`. This is usually indicative of an error condtion. Consider the follow example <?php function getDate($date) { if ($date !== null) { return new DateTime($date); } return false; } This function either returns a new `DateTime` object or false, if there was an error. This is a typical pattern in PHP programming to show that an error has occurred without raising an exception. The calling code should check for this returned `false` before passing on the value to another function or method that may not be able to handle a `false`. Loading history...
258			$urlJS = Convert::raw2js($url);
			0 ignored issues – show Security Bug introduced 2016-09-09 02:12 UTC by Report Bug Copy Issue Report It seems like `$url` defined by `\SilverStripe\Control\Di...ders['Location'], true)` on line `256` can also be of type `false`; however, `SilverStripe\Core\Convert::raw2js()` does only seem to accept `array\|string`, did you maybe forget to handle an error condition? This check looks for type mismatches where the missing type is `false`. This is usually indicative of an error condtion. Consider the follow example <?php function getDate($date) { if ($date !== null) { return new DateTime($date); } return false; } This function either returns a new `DateTime` object or false, if there was an error. This is a typical pattern in PHP programming to show that an error has occurred without raising an exception. The calling code should check for this returned `false` before passing on the value to another function or method that may not be able to handle a `false`. Loading history...
259			$title = Director::isDev()
260			? "{$urlATT}... (output started on {$file}, line {$line})"
261			: "{$urlATT}...";
262			echo <<<EOT
263			<p>Redirecting to <a href="{$urlATT}" title="Click this link if your browser does not redirect you">{$title}</a></p>
264			<meta http-equiv="refresh" content="1; url={$urlATT}" />
265			<script type="application/javascript">setTimeout(function(){
266			window.location.href = "{$urlJS}";
267			}, 50);</script>
268			EOT
269			;
270			} else {
271			$line = $file = null;
272			if(!headers_sent($file, $line)) {
273			header($_SERVER['SERVER_PROTOCOL'] . " $this->statusCode " . $this->getStatusDescription());
274			foreach($this->headers as $header => $value) {
275			//etags need to be quoted
276			if (strcasecmp('etag', $header) === 0 && 0 !== strpos($value, '"')) {
277			$value = sprintf('"%s"', $value);
278			}
279			header("$header: $value", true, $this->statusCode);
280			}
281			} else {
282			// It's critical that these status codes are sent; we need to report a failure if not.
283			if($this->statusCode >= 300) {
284			user_error(
285			"Couldn't set response type to $this->statusCode because " .
286			"of output on line $line of $file",
287			E_USER_WARNING
288			);
289			}
290			}
291
292			// Only show error pages or generic "friendly" errors if the status code signifies
293			// an error, and the response doesn't have any body yet that might contain
294			// a more specific error description.
295			if(Director::isLive() && $this->isError() && !$this->body) {
296			$formatter = Injector::inst()->get('FriendlyErrorFormatter');
297			echo $formatter->format(array(
298			'code' => $this->statusCode
299			));
300
301			} else {
302			echo $this->body;
303			}
304
305			}
306			}
307
308			/**
309			* Returns true if this response is "finished", that is, no more script execution should be done.
310			* Specifically, returns true if a redirect has already been requested
311			*
312			* @return bool
313			*/
314			public function isFinished() {
315			return in_array($this->statusCode, array(301, 302, 303, 304, 305, 307, 401, 403));
316			}
317
318			}
319

silverstripe / silverstripe-framework

Push — master ( f5d71d...bfd9cb )

HTTPResponse A

Complexity

Size/Duplication

Coupling/Cohesion

Importance

15 Methods

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