Request::forwardErrors() - Code Metrics - Respect/Rest - Measure and Improve Code Quality continuously with Scrutinizer

Request::forwardErrors() A
last analyzed 2019-03-22 22:45 UTC

↳ Parent: Request

Complexity

Conditions	6
Paths	9

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	12.1743

Importance

Changes

Metric	Value
dl	0
loc	16
ccs	4
cts	9
cp	0.4444
rs	9.1111
c	0
b	0
f	0
cc	6
nc	9
nop	1
crap	12.1743

<?php
/*
 * This file is part of the Respect\Rest package.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Respect\Rest;

use ReflectionFunctionAbstract;
use ReflectionParameter;
use Respect\Rest\Routes\AbstractRoute;
use Respect\Rest\Routines\Routinable;
use Respect\Rest\Routines\ProxyableBy;
use Respect\Rest\Routines\ProxyableThrough;
use Respect\Rest\Routines\ParamSynced;

/** A routed HTTP Request */
class Request
{
    /** @var string The HTTP method (commonly GET, POST, PUT, DELETE, HEAD) */
    public $method = '';

    /**
     * @var array A numeric array containing valid URL parameters. For a route
     * path like /users/*, a Request for /users/alganet should have an array
     * equivalent to ['alganet']
     */
    public $params = array();

    /** @var AbstractRoute A route matched for this request */
    public $route;

    /** @var string The called URI */
    public $uri = '';

    /**
     * @param string $method The HTTP method
     * @param string $uri    The called URI
     */
    public function __construct($method = null, $uri = null)
// Bad
class Router
{
    public function generate($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 = $request->query->get('page', 1);
    }
}
    {
        //Tries to infer request variables only if null
        if (is_null($method)) {
            $method = isset($_SERVER['REQUEST_METHOD'])
                ? $_SERVER['REQUEST_METHOD']
                : 'GET';
        }

        if (is_null($uri)) {
            $uri = isset($_SERVER['REQUEST_URI'])
                ? $_SERVER['REQUEST_URI']
                : '/';
        }

        $uri = parse_url($uri, PHP_URL_PATH);
        $this->uri = rtrim($uri, ' /');       //We always ignore the last /
        $this->method = strtoupper($method);  //normalizing the HTTP method
    }

    /**
     * Converting this request to string dispatch
     */
    public function __toString()
    {
        return $this->response();
    }

    /**
     * Declares an error handler for a single Router::errorRoute instance on the
     * fly before dispatching the request, so the application can capture the
     * errors. These are cleaned after dispatching by forwardErrors()
     *
     * @see    Respect\Rest\Request::forwardErrors
     * @see    http://php.net/set_error_handler
     *
     * @return mixed The previous error handler
     */
    protected function prepareForErrorForwards()
    {
       foreach ($this->route->sideRoutes as $sideRoute) {
            if ($sideRoute instanceof Routes\Error) {
                return set_error_handler(
                    function () use ($sideRoute) {
                        $sideRoute->errors[] = func_get_args();
                    }
                );
            }
        }
    }

    /**
     * Iterates over routines to find instances of
     * Respect\Rest\Routines\ProxyableBy and call them, forwarding if
     * necessary
     *
     * @see    Respect\Rest\Routines\ProxyableBy
     * @see    Respect\Rest\Request::routineCall
     *
     * @return mixed A route forwarding or false
     */
    protected function processPreRoutines()
    {
        foreach ($this->route->routines as $routine) {
            if (!$routine instanceof ProxyableBy) {
                continue;
            } else {
                $result = $this->routineCall(
                    'by',
                    $this->method,
                    $routine,
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                    $this->params
                );

                //Routine returned an instance, let's forward it
                if ($result instanceof AbstractRoute) {
                    return $this->forward($result);
                } elseif (false === $result) {
                    return false;
                }
            }
        }
    }

    /**
     * Iterates over routines to find instances of
     * Respect\Rest\Routines\ProxyableThrough and call them, forwarding if
     * necessary
     *
     * @see    Respect\Rest\Routines\ProxyableThrough
     * @see    Respect\Rest\Request::routineCall
     *
     * @return mixed A route forwarding or false
     */
    protected function processPosRoutines($response)
    {
        $proxyResults = array();

        foreach ($this->route->routines as $routine) {
            if ($routine instanceof ProxyableThrough) {
                $proxyResults[] = $this->routineCall(
                    'through',
                    $this->method,
                    $routine,
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                    $this->params
                );
            }
        }

        //Some routine returned a callback as its result. Let's run
        //these callbacks on our actual response.
        //This is mainly used by accept() and similar ones.
        foreach ($proxyResults as $proxyCallback) {
            if (is_callable($proxyCallback)) {
                $response = call_user_func_array(
                    $proxyCallback,
                    array($response)
                );
            }
        }

        return $response;
    }

    /**
     * Restores the previous error handler if present then check error routes
     * for logged errors, forwarding them or returning null silently
     *
     * @param mixed $errorHandler Some error handler (internal or external to
     *                            Respect)
     *
     * @return mixed A route forwarding or a silent null
     */
    protected function forwardErrors($errorHandler)
    {
        if (isset($errorHandler)) {
            if (!$errorHandler) {
                restore_error_handler();
            } else {
                set_error_handler($errorHandler);
            }
        }

        foreach ($this->route->sideRoutes as $sideRoute) {
            if ($sideRoute instanceof Routes\Error && $sideRoute->errors) {

                return $this->forward($sideRoute);
            }
        }
    }

    /**
     * Does a catch-like operation on an exception based on previously
     * declared instances from Router::exceptionRoute
     *
     * @param Exception $e Any exception
     *
     * @return mixed A route forwarding or a silent null
     */
    protected function catchExceptions($e)
    {
        foreach ($this->route->sideRoutes as $sideRoute) {
            $exceptionClass = get_class($e);
            if (
                $exceptionClass      === $sideRoute->class
                || $sideRoute->class === 'Exception'
                || $sideRoute->class === '\Exception'
            ) {
                $sideRoute->exception = $e;

                return $this->forward($sideRoute);
            }
        }
    }

    /**
     * Generates and returns the response from the current route
     *
     * @return string A response!
     */
    public function response()
    {
        try {
            //No routes, get out
            if (!$this->route instanceof AbstractRoute) {
                return;
            }

            $errorHandler = $this->prepareForErrorForwards();
            $preRoutineResult = $this->processPreRoutines();


            if (!is_null($preRoutineResult)) {
                return $preRoutineResult;
            }

            $response = $this->route->runTarget($this->method, $this->params);

            //The code returned another route, this is a forward
            if ($response instanceof AbstractRoute) {
                return $this->forward($response);
            }

            $possiblyModifiedResponse = $this->processPosRoutines($response);
            $errorResponse = $this->forwardErrors($errorHandler);

            if (!is_null($errorResponse)) {
                return $errorResponse;
            }

            return $possiblyModifiedResponse;
        } catch (\Exception $e) {
            //Tries to catch it using catchExceptions()
            if (!$exceptionResponse = $this->catchExceptions($e)) {
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                throw $e;
            }

            //Returns whatever the exception routes returned
            return (string) $exceptionResponse;
        }
    }

    /**
     * Calls a routine on the current route and returns its result
     *
     * @param string     $type    The name of the routine (accept, when, etc)
     * @param string     $method  The method name (GET, HEAD, POST, etc)
     * @param Routinable $routine Some routine instance
     * @param array      $params  Params from the routine
     *
     * @return mixed Whatever the routine returns
     */
    public function routineCall($type, $method, Routinable $routine, &$params)
    {
        $reflection = $this->route->getReflection(
            //GET and HEAD are the same for routines
            $method == 'HEAD' ? 'GET' : $method
        );

        $callbackParameters = array();

        if (!$routine instanceof ParamSynced) {
            $callbackParameters = $params;
        } else {
            foreach ($routine->getParameters() as $parameter) {
                $callbackParameters[] = $this->extractRouteParam(
                    $reflection,
                    $parameter,
                    $params
                );
            }
        }

        return $routine->{$type}($this, $callbackParameters);
    }

    /**
     * Extracts a parameter value from the current route
     *
     * @param ReflectionFunctionAbstract $callback   Any function reflection
     * @param ReflectionParameter        $routeParam Any parameter reflection
     * @param array                      $params     Request URI params
     *
     * @return mixed a value from the reflected param
     */
    protected function extractRouteParam(
        ReflectionFunctionAbstract $callback,
        ReflectionParameter $routeParam,
        &$params
    ) {
        foreach ($callback->getParameters() as $callbackParamReflection) {
            //Check if parameters have same name and present (not filtered)
            if (
                $callbackParamReflection->getName() === $routeParam->getName()
                && isset($params[$callbackParamReflection->getPosition()])
            ) {
                return $params[$callbackParamReflection->getPosition()];
            }
        }

        if ($routeParam->isDefaultValueAvailable()) {
            return $routeParam->getDefaultValue();
        }

        return;
    }

    /**
     * Forwards a route
     *
     * @param AbstractRoute $route Any route
     *
     * @return Response from the forwarded route
     */
    public function forward(AbstractRoute $route)
    {
        $this->route = $route;

        return $this->response();
    }
}


1		<?php
2		/*
3		* This file is part of the Respect\Rest package.
4		*
5		* For the full copyright and license information, please view the LICENSE
6		* file that was distributed with this source code.
7		*/
8
9		namespace Respect\Rest;
10
11		use ReflectionFunctionAbstract;
12		use ReflectionParameter;
13		use Respect\Rest\Routes\AbstractRoute;
14		use Respect\Rest\Routines\Routinable;
15		use Respect\Rest\Routines\ProxyableBy;
16		use Respect\Rest\Routines\ProxyableThrough;
17		use Respect\Rest\Routines\ParamSynced;
18
19		/** A routed HTTP Request */
20		class Request
21		{
22		/** @var string The HTTP method (commonly GET, POST, PUT, DELETE, HEAD) */
23		public $method = '';
24
25		/**
26		* @var array A numeric array containing valid URL parameters. For a route
27		* path like /users/*, a Request for /users/alganet should have an array
28		* equivalent to ['alganet']
29		*/
30		public $params = array();
31
32		/** @var AbstractRoute A route matched for this request */
33		public $route;
34
35		/** @var string The called URI */
36		public $uri = '';
37
38		/**
39		* @param string $method The HTTP method
40		* @param string $uri The called URI
41		*/
42	130	public function __construct($method = null, $uri = null)
		0 ignored issues – show Coding Style introduced 2017-10-11 18:44 UTC by Report Bug Copy Issue Report `__construct` uses the super-global variable `$_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 = $request->query->get('page', 1); } } Loading history...
43		{
44		//Tries to infer request variables only if null
45	130	if (is_null($method)) {
46	5	$method = isset($_SERVER['REQUEST_METHOD'])
47	5	? $_SERVER['REQUEST_METHOD']
48	5	: 'GET';
49		}
50
51	130	if (is_null($uri)) {
52	6	$uri = isset($_SERVER['REQUEST_URI'])
53	6	? $_SERVER['REQUEST_URI']
54	6	: '/';
55		}
56
57	130	$uri = parse_url($uri, PHP_URL_PATH);
58	130	$this->uri = rtrim($uri, ' /'); //We always ignore the last /
59	130	$this->method = strtoupper($method); //normalizing the HTTP method
60	130	}
61
62		/**
63		* Converting this request to string dispatch
64		*/
65	7	public function __toString()
66		{
67	7	return $this->response();
68		}
69
70		/**
71		* Declares an error handler for a single Router::errorRoute instance on the
72		* fly before dispatching the request, so the application can capture the
73		* errors. These are cleaned after dispatching by forwardErrors()
74		*
75		* @see Respect\Rest\Request::forwardErrors
76		* @see http://php.net/set_error_handler
77		*
78		* @return mixed The previous error handler
79		*/
80	111	protected function prepareForErrorForwards()
81		{
82	111	foreach ($this->route->sideRoutes as $sideRoute) {
83		if ($sideRoute instanceof Routes\Error) {
84		return set_error_handler(
85		function () use ($sideRoute) {
86		$sideRoute->errors[] = func_get_args();
87		}
88		);
89		}
90		}
91	111	}
92
93		/**
94		* Iterates over routines to find instances of
95		* Respect\Rest\Routines\ProxyableBy and call them, forwarding if
96		* necessary
97		*
98		* @see Respect\Rest\Routines\ProxyableBy
99		* @see Respect\Rest\Request::routineCall
100		*
101		* @return mixed A route forwarding or false
102		*/
103	111	protected function processPreRoutines()
104		{
105	111	foreach ($this->route->routines as $routine) {
106	48	if (!$routine instanceof ProxyableBy) {
107	9	continue;
108		} else {
109	40	$result = $this->routineCall(
110	40	'by',
111	40	$this->method,
112	40	$routine,
		0 ignored issues – show Documentation introduced 2015-12-08 16:07 UTC by Report Bug Copy Issue Report `$routine` is of type `object<Respect\Rest\Routines\ProxyableBy>`, but the function expects a `object<Respect\Rest\Routines\Routinable>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
113	40	$this->params
114		);
115
116		//Routine returned an instance, let's forward it
117	40	if ($result instanceof AbstractRoute) {
118	2	return $this->forward($result);
119	38	} elseif (false === $result) {
120	4	return false;
121		}
122		}
123		}
124	107	}
125
126		/**
127		* Iterates over routines to find instances of
128		* Respect\Rest\Routines\ProxyableThrough and call them, forwarding if
129		* necessary
130		*
131		* @see Respect\Rest\Routines\ProxyableThrough
132		* @see Respect\Rest\Request::routineCall
133		*
134		* @return mixed A route forwarding or false
135		*/
136	105	protected function processPosRoutines($response)
137		{
138	105	$proxyResults = array();
139
140	105	foreach ($this->route->routines as $routine) {
141	42	if ($routine instanceof ProxyableThrough) {
142	30	$proxyResults[] = $this->routineCall(
143	30	'through',
144	30	$this->method,
145	30	$routine,
		0 ignored issues – show Documentation introduced 2015-12-08 16:07 UTC by Report Bug Copy Issue Report `$routine` is of type `object<Respect\Rest\Routines\ProxyableThrough>`, but the function expects a `object<Respect\Rest\Routines\Routinable>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
146	30	$this->params
147		);
148		}
149		}
150
151		//Some routine returned a callback as its result. Let's run
152		//these callbacks on our actual response.
153		//This is mainly used by accept() and similar ones.
154	105	foreach ($proxyResults as $proxyCallback) {
155	30	if (is_callable($proxyCallback)) {
156	28	$response = call_user_func_array(
157	28	$proxyCallback,
158	28	array($response)
159		);
160		}
161		}
162
163	105	return $response;
164		}
165
166		/**
167		* Restores the previous error handler if present then check error routes
168		* for logged errors, forwarding them or returning null silently
169		*
170		* @param mixed $errorHandler Some error handler (internal or external to
171		* Respect)
172		*
173		* @return mixed A route forwarding or a silent null
174		*/
175	105	protected function forwardErrors($errorHandler)
176		{
177	105	if (isset($errorHandler)) {
178		if (!$errorHandler) {
179		restore_error_handler();
180		} else {
181		set_error_handler($errorHandler);
182		}
183		}
184
185	105	foreach ($this->route->sideRoutes as $sideRoute) {
186		if ($sideRoute instanceof Routes\Error && $sideRoute->errors) {
		0 ignored issues – show Bug Best Practice introduced 2015-12-08 16:07 UTC by Report Bug Copy Issue Report The expression `$sideRoute->errors` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `! empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
187		return $this->forward($sideRoute);
188		}
189		}
190	105	}
191
192		/**
193		* Does a catch-like operation on an exception based on previously
194		* declared instances from Router::exceptionRoute
195		*
196		* @param Exception $e Any exception
197		*
198		* @return mixed A route forwarding or a silent null
199		*/
200	2	protected function catchExceptions($e)
201		{
202	2	foreach ($this->route->sideRoutes as $sideRoute) {
203		$exceptionClass = get_class($e);
204		if (
205		$exceptionClass === $sideRoute->class
206		\|\| $sideRoute->class === 'Exception'
207		\|\| $sideRoute->class === '\Exception'
208		) {
209		$sideRoute->exception = $e;
210
211		return $this->forward($sideRoute);
212		}
213		}
214	2	}
215
216		/**
217		* Generates and returns the response from the current route
218		*
219		* @return string A response!
220		*/
221	115	public function response()
222		{
223		try {
224		//No routes, get out
225	115	if (!$this->route instanceof AbstractRoute) {
226	4	return;
227		}
228
229	111	$errorHandler = $this->prepareForErrorForwards();
230	111	$preRoutineResult = $this->processPreRoutines();
		0 ignored issues – show Comprehensibility Best Practice introduced 2016-03-11 17:48 UTC by Report Bug Copy Issue Report The expression `$this->processPreRoutines();` of type `string\|false\|null` adds `false` to the return on line 233 which is incompatible with the return type documented by `Respect\Rest\Request::response` of type `string`. It seems like you forgot to handle an error condition. Loading history...
231
232	111	if (!is_null($preRoutineResult)) {
233	6	return $preRoutineResult;
234		}
235
236	107	$response = $this->route->runTarget($this->method, $this->params);
237
238		//The code returned another route, this is a forward
239	105	if ($response instanceof AbstractRoute) {
240	2	return $this->forward($response);
241		}
242
243	105	$possiblyModifiedResponse = $this->processPosRoutines($response);
244	105	$errorResponse = $this->forwardErrors($errorHandler);
245
246	105	if (!is_null($errorResponse)) {
247		return $errorResponse;
248		}
249
250	105	return $possiblyModifiedResponse;
251	2	} catch (\Exception $e) {
252		//Tries to catch it using catchExceptions()
253	2	if (!$exceptionResponse = $this->catchExceptions($e)) {
		0 ignored issues – show Documentation introduced 2015-12-08 16:07 UTC by Report Bug Copy Issue Report `$e` is of type `object<Exception>`, but the function expects a `object<Respect\Rest\Exception>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
254	2	throw $e;
255		}
256
257		//Returns whatever the exception routes returned
258		return (string) $exceptionResponse;
259		}
260		}
261
262		/**
263		* Calls a routine on the current route and returns its result
264		*
265		* @param string $type The name of the routine (accept, when, etc)
266		* @param string $method The method name (GET, HEAD, POST, etc)
267		* @param Routinable $routine Some routine instance
268		* @param array $params Params from the routine
269		*
270		* @return mixed Whatever the routine returns
271		*/
272	54	public function routineCall($type, $method, Routinable $routine, &$params)
273		{
274	54	$reflection = $this->route->getReflection(
275		//GET and HEAD are the same for routines
276	54	$method == 'HEAD' ? 'GET' : $method
277		);
278
279	54	$callbackParameters = array();
280
281	54	if (!$routine instanceof ParamSynced) {
282	36	$callbackParameters = $params;
283		} else {
284	18	foreach ($routine->getParameters() as $parameter) {
285	10	$callbackParameters[] = $this->extractRouteParam(
286	10	$reflection,
287	10	$parameter,
288	10	$params
289		);
290		}
291		}
292
293	54	return $routine->{$type}($this, $callbackParameters);
294		}
295
296		/**
297		* Extracts a parameter value from the current route
298		*
299		* @param ReflectionFunctionAbstract $callback Any function reflection
300		* @param ReflectionParameter $routeParam Any parameter reflection
301		* @param array $params Request URI params
302		*
303		* @return mixed a value from the reflected param
304		*/
305	10	protected function extractRouteParam(
306		ReflectionFunctionAbstract $callback,
307		ReflectionParameter $routeParam,
308		&$params
309		) {
310	10	foreach ($callback->getParameters() as $callbackParamReflection) {
311		//Check if parameters have same name and present (not filtered)
312		if (
313	9	$callbackParamReflection->getName() === $routeParam->getName()
314	9	&& isset($params[$callbackParamReflection->getPosition()])
315		) {
316	7	return $params[$callbackParamReflection->getPosition()];
317		}
318		}
319
320	6	if ($routeParam->isDefaultValueAvailable()) {
321	3	return $routeParam->getDefaultValue();
322		}
323
324	4	return;
325		}
326
327		/**
328		* Forwards a route
329		*
330		* @param AbstractRoute $route Any route
331		*
332		* @return Response from the forwarded route
333		*/
334	5	public function forward(AbstractRoute $route)
335		{
336	5	$this->route = $route;
337
338	5	return $this->response();
339		}
340		}
341

Respect / Rest

Request::forwardErrors() A last analyzed 2019-03-22 22:45 UTC

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Filter issues like

Request::forwardErrors() A
last analyzed 2019-03-22 22:45 UTC