This file is indexed.

/usr/share/php/Symfony/Component/HttpKernel/Controller/ControllerResolver.php is in php-symfony-http-kernel 3.4.6+dfsg-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpKernel\Controller;

use Psr\Log\LoggerInterface;
use Symfony\Component\HttpFoundation\Request;

/**
 * This implementation uses the '_controller' request attribute to determine
 * the controller to execute and uses the request attributes to determine
 * the controller method arguments.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class ControllerResolver implements ArgumentResolverInterface, ControllerResolverInterface
{
    private $logger;

    /**
     * If the ...$arg functionality is available.
     *
     * Requires at least PHP 5.6.0 or HHVM 3.9.1
     *
     * @var bool
     */
    private $supportsVariadic;

    /**
     * If scalar types exists.
     *
     * @var bool
     */
    private $supportsScalarTypes;

    public function __construct(LoggerInterface $logger = null)
    {
        $this->logger = $logger;

        $this->supportsVariadic = method_exists('ReflectionParameter', 'isVariadic');
        $this->supportsScalarTypes = method_exists('ReflectionParameter', 'getType');
    }

    /**
     * {@inheritdoc}
     *
     * This method looks for a '_controller' request attribute that represents
     * the controller name (a string like ClassName::MethodName).
     */
    public function getController(Request $request)
    {
        if (!$controller = $request->attributes->get('_controller')) {
            if (null !== $this->logger) {
                $this->logger->warning('Unable to look for the controller as the "_controller" parameter is missing.');
            }

            return false;
        }

        if (is_array($controller)) {
            return $controller;
        }

        if (is_object($controller)) {
            if (method_exists($controller, '__invoke')) {
                return $controller;
            }

            throw new \InvalidArgumentException(sprintf('Controller "%s" for URI "%s" is not callable.', get_class($controller), $request->getPathInfo()));
        }

        if (false === strpos($controller, ':')) {
            if (method_exists($controller, '__invoke')) {
                return $this->instantiateController($controller);
            } elseif (function_exists($controller)) {
                return $controller;
            }
        }

        $callable = $this->createController($controller);

        if (!is_callable($callable)) {
            throw new \InvalidArgumentException(sprintf('The controller for URI "%s" is not callable. %s', $request->getPathInfo(), $this->getControllerError($callable)));
        }

        return $callable;
    }

    /**
     * {@inheritdoc}
     *
     * @deprecated This method is deprecated as of 3.1 and will be removed in 4.0. Implement the ArgumentResolverInterface and inject it in the HttpKernel instead.
     */
    public function getArguments(Request $request, $controller)
    {
        @trigger_error(sprintf('%s is deprecated as of 3.1 and will be removed in 4.0. Implement the %s and inject it in the HttpKernel instead.', __METHOD__, ArgumentResolverInterface::class), E_USER_DEPRECATED);

        if (is_array($controller)) {
            $r = new \ReflectionMethod($controller[0], $controller[1]);
        } elseif (is_object($controller) && !$controller instanceof \Closure) {
            $r = new \ReflectionObject($controller);
            $r = $r->getMethod('__invoke');
        } else {
            $r = new \ReflectionFunction($controller);
        }

        return $this->doGetArguments($request, $controller, $r->getParameters());
    }

    /**
     * @param Request                $request
     * @param callable               $controller
     * @param \ReflectionParameter[] $parameters
     *
     * @return array The arguments to use when calling the action
     *
     * @deprecated This method is deprecated as of 3.1 and will be removed in 4.0. Implement the ArgumentResolverInterface and inject it in the HttpKernel instead.
     */
    protected function doGetArguments(Request $request, $controller, array $parameters)
    {
        @trigger_error(sprintf('%s is deprecated as of 3.1 and will be removed in 4.0. Implement the %s and inject it in the HttpKernel instead.', __METHOD__, ArgumentResolverInterface::class), E_USER_DEPRECATED);

        $attributes = $request->attributes->all();
        $arguments = array();
        foreach ($parameters as $param) {
            if (array_key_exists($param->name, $attributes)) {
                if ($this->supportsVariadic && $param->isVariadic() && is_array($attributes[$param->name])) {
                    $arguments = array_merge($arguments, array_values($attributes[$param->name]));
                } else {
                    $arguments[] = $attributes[$param->name];
                }
            } elseif ($param->getClass() && $param->getClass()->isInstance($request)) {
                $arguments[] = $request;
            } elseif ($param->isDefaultValueAvailable()) {
                $arguments[] = $param->getDefaultValue();
            } elseif ($this->supportsScalarTypes && $param->hasType() && $param->allowsNull()) {
                $arguments[] = null;
            } else {
                if (is_array($controller)) {
                    $repr = sprintf('%s::%s()', get_class($controller[0]), $controller[1]);
                } elseif (is_object($controller)) {
                    $repr = get_class($controller);
                } else {
                    $repr = $controller;
                }

                throw new \RuntimeException(sprintf('Controller "%s" requires that you provide a value for the "$%s" argument (because there is no default value or because there is a non optional argument after this one).', $repr, $param->name));
            }
        }

        return $arguments;
    }

    /**
     * Returns a callable for the given controller.
     *
     * @param string $controller A Controller string
     *
     * @return callable A PHP callable
     *
     * @throws \InvalidArgumentException
     */
    protected function createController($controller)
    {
        if (false === strpos($controller, '::')) {
            throw new \InvalidArgumentException(sprintf('Unable to find controller "%s".', $controller));
        }

        list($class, $method) = explode('::', $controller, 2);

        if (!class_exists($class)) {
            throw new \InvalidArgumentException(sprintf('Class "%s" does not exist.', $class));
        }

        return array($this->instantiateController($class), $method);
    }

    /**
     * Returns an instantiated controller.
     *
     * @param string $class A class name
     *
     * @return object
     */
    protected function instantiateController($class)
    {
        return new $class();
    }

    private function getControllerError($callable)
    {
        if (is_string($callable)) {
            if (false !== strpos($callable, '::')) {
                $callable = explode('::', $callable);
            }

            if (class_exists($callable) && !method_exists($callable, '__invoke')) {
                return sprintf('Class "%s" does not have a method "__invoke".', $callable);
            }

            if (!function_exists($callable)) {
                return sprintf('Function "%s" does not exist.', $callable);
            }
        }

        if (!is_array($callable)) {
            return sprintf('Invalid type for controller given, expected string or array, got "%s".', gettype($callable));
        }

        if (2 !== count($callable)) {
            return 'Invalid format for controller, expected array(controller, method) or controller::method.';
        }

        list($controller, $method) = $callable;

        if (is_string($controller) && !class_exists($controller)) {
            return sprintf('Class "%s" does not exist.', $controller);
        }

        $className = is_object($controller) ? get_class($controller) : $controller;

        if (method_exists($controller, $method)) {
            return sprintf('Method "%s" on class "%s" should be public and non-abstract.', $method, $className);
        }

        $collection = get_class_methods($controller);

        $alternatives = array();

        foreach ($collection as $item) {
            $lev = levenshtein($method, $item);

            if ($lev <= strlen($method) / 3 || false !== strpos($item, $method)) {
                $alternatives[] = $item;
            }
        }

        asort($alternatives);

        $message = sprintf('Expected method "%s" on class "%s"', $method, $className);

        if (count($alternatives) > 0) {
            $message .= sprintf(', did you mean "%s"?', implode('", "', $alternatives));
        } else {
            $message .= sprintf('. Available methods: "%s".', implode('", "', $collection));
        }

        return $message;
    }
}