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Classes

  • Dispatcher
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  • Router
   1: <?php
   2: /**
   3:  * Parses the request URL into controller, action, and parameters.
   4:  *
   5:  * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
   6:  * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
   7:  *
   8:  * Licensed under The MIT License
   9:  * For full copyright and license information, please see the LICENSE.txt
  10:  * Redistributions of files must retain the above copyright notice.
  11:  *
  12:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
  13:  * @link          https://cakephp.org CakePHP(tm) Project
  14:  * @package       Cake.Routing
  15:  * @since         CakePHP(tm) v 0.2.9
  16:  * @license       https://opensource.org/licenses/mit-license.php MIT License
  17:  */
  18: 
  19: App::uses('CakeRequest', 'Network');
  20: App::uses('CakeRoute', 'Routing/Route');
  21: 
  22: /**
  23:  * Parses the request URL into controller, action, and parameters. Uses the connected routes
  24:  * to match the incoming URL string to parameters that will allow the request to be dispatched. Also
  25:  * handles converting parameter lists into URL strings, using the connected routes. Routing allows you to decouple
  26:  * the way the world interacts with your application (URLs) and the implementation (controllers and actions).
  27:  *
  28:  * ### Connecting routes
  29:  *
  30:  * Connecting routes is done using Router::connect(). When parsing incoming requests or reverse matching
  31:  * parameters, routes are enumerated in the order they were connected. You can modify the order of connected
  32:  * routes using Router::promote(). For more information on routes and how to connect them see Router::connect().
  33:  *
  34:  * ### Named parameters
  35:  *
  36:  * Named parameters allow you to embed key:value pairs into path segments. This allows you create hash
  37:  * structures using URLs. You can define how named parameters work in your application using Router::connectNamed()
  38:  *
  39:  * @package       Cake.Routing
  40:  */
  41: class Router {
  42: 
  43: /**
  44:  * Array of routes connected with Router::connect()
  45:  *
  46:  * @var array
  47:  */
  48:     public static $routes = array();
  49: 
  50: /**
  51:  * Have routes been loaded
  52:  *
  53:  * @var bool
  54:  */
  55:     public static $initialized = false;
  56: 
  57: /**
  58:  * Contains the base string that will be applied to all generated URLs
  59:  * For example `https://example.com`
  60:  *
  61:  * @var string
  62:  */
  63:     protected static $_fullBaseUrl;
  64: 
  65: /**
  66:  * List of action prefixes used in connected routes.
  67:  * Includes admin prefix
  68:  *
  69:  * @var array
  70:  */
  71:     protected static $_prefixes = array();
  72: 
  73: /**
  74:  * Directive for Router to parse out file extensions for mapping to Content-types.
  75:  *
  76:  * @var bool
  77:  */
  78:     protected static $_parseExtensions = false;
  79: 
  80: /**
  81:  * List of valid extensions to parse from a URL. If null, any extension is allowed.
  82:  *
  83:  * @var array
  84:  */
  85:     protected static $_validExtensions = array();
  86: 
  87: /**
  88:  * Regular expression for action names
  89:  *
  90:  * @var string
  91:  */
  92:     const ACTION = 'index|show|add|create|edit|update|remove|del|delete|view|item';
  93: 
  94: /**
  95:  * Regular expression for years
  96:  *
  97:  * @var string
  98:  */
  99:     const YEAR = '[12][0-9]{3}';
 100: 
 101: /**
 102:  * Regular expression for months
 103:  *
 104:  * @var string
 105:  */
 106:     const MONTH = '0[1-9]|1[012]';
 107: 
 108: /**
 109:  * Regular expression for days
 110:  *
 111:  * @var string
 112:  */
 113:     const DAY = '0[1-9]|[12][0-9]|3[01]';
 114: 
 115: /**
 116:  * Regular expression for auto increment IDs
 117:  *
 118:  * @var string
 119:  */
 120:     const ID = '[0-9]+';
 121: 
 122: /**
 123:  * Regular expression for UUIDs
 124:  *
 125:  * @var string
 126:  */
 127:     const UUID = '[A-Fa-f0-9]{8}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{12}';
 128: 
 129: /**
 130:  * Named expressions
 131:  *
 132:  * @var array
 133:  */
 134:     protected static $_namedExpressions = array(
 135:         'Action' => Router::ACTION,
 136:         'Year' => Router::YEAR,
 137:         'Month' => Router::MONTH,
 138:         'Day' => Router::DAY,
 139:         'ID' => Router::ID,
 140:         'UUID' => Router::UUID
 141:     );
 142: 
 143: /**
 144:  * Stores all information necessary to decide what named arguments are parsed under what conditions.
 145:  *
 146:  * @var string
 147:  */
 148:     protected static $_namedConfig = array(
 149:         'default' => array('page', 'fields', 'order', 'limit', 'recursive', 'sort', 'direction', 'step'),
 150:         'greedyNamed' => true,
 151:         'separator' => ':',
 152:         'rules' => false,
 153:     );
 154: 
 155: /**
 156:  * The route matching the URL of the current request
 157:  *
 158:  * @var array
 159:  */
 160:     protected static $_currentRoute = array();
 161: 
 162: /**
 163:  * Default HTTP request method => controller action map.
 164:  *
 165:  * @var array
 166:  */
 167:     protected static $_resourceMap = array(
 168:         array('action' => 'index', 'method' => 'GET', 'id' => false),
 169:         array('action' => 'view', 'method' => 'GET', 'id' => true),
 170:         array('action' => 'add', 'method' => 'POST', 'id' => false),
 171:         array('action' => 'edit', 'method' => 'PUT', 'id' => true),
 172:         array('action' => 'delete', 'method' => 'DELETE', 'id' => true),
 173:         array('action' => 'edit', 'method' => 'POST', 'id' => true)
 174:     );
 175: 
 176: /**
 177:  * List of resource-mapped controllers
 178:  *
 179:  * @var array
 180:  */
 181:     protected static $_resourceMapped = array();
 182: 
 183: /**
 184:  * Maintains the request object stack for the current request.
 185:  * This will contain more than one request object when requestAction is used.
 186:  *
 187:  * @var array
 188:  */
 189:     protected static $_requests = array();
 190: 
 191: /**
 192:  * Initial state is populated the first time reload() is called which is at the bottom
 193:  * of this file. This is a cheat as get_class_vars() returns the value of static vars even if they
 194:  * have changed.
 195:  *
 196:  * @var array
 197:  */
 198:     protected static $_initialState = array();
 199: 
 200: /**
 201:  * Default route class to use
 202:  *
 203:  * @var string
 204:  */
 205:     protected static $_routeClass = 'CakeRoute';
 206: 
 207: /**
 208:  * Set the default route class to use or return the current one
 209:  *
 210:  * @param string $routeClass The route class to set as default.
 211:  * @return string|null The default route class.
 212:  * @throws RouterException
 213:  */
 214:     public static function defaultRouteClass($routeClass = null) {
 215:         if ($routeClass === null) {
 216:             return static::$_routeClass;
 217:         }
 218: 
 219:         static::$_routeClass = static::_validateRouteClass($routeClass);
 220:     }
 221: 
 222: /**
 223:  * Validates that the passed route class exists and is a subclass of CakeRoute
 224:  *
 225:  * @param string $routeClass Route class name
 226:  * @return string
 227:  * @throws RouterException
 228:  */
 229:     protected static function _validateRouteClass($routeClass) {
 230:         if ($routeClass !== 'CakeRoute' &&
 231:             (!class_exists($routeClass) || !is_subclass_of($routeClass, 'CakeRoute'))
 232:         ) {
 233:             throw new RouterException(__d('cake_dev', 'Route class not found, or route class is not a subclass of CakeRoute'));
 234:         }
 235:         return $routeClass;
 236:     }
 237: 
 238: /**
 239:  * Sets the Routing prefixes.
 240:  *
 241:  * @return void
 242:  */
 243:     protected static function _setPrefixes() {
 244:         $routing = Configure::read('Routing');
 245:         if (!empty($routing['prefixes'])) {
 246:             static::$_prefixes = array_merge(static::$_prefixes, (array)$routing['prefixes']);
 247:         }
 248:     }
 249: 
 250: /**
 251:  * Gets the named route elements for use in app/Config/routes.php
 252:  *
 253:  * @return array Named route elements
 254:  * @see Router::$_namedExpressions
 255:  */
 256:     public static function getNamedExpressions() {
 257:         return static::$_namedExpressions;
 258:     }
 259: 
 260: /**
 261:  * Resource map getter & setter.
 262:  *
 263:  * @param array $resourceMap Resource map
 264:  * @return mixed
 265:  * @see Router::$_resourceMap
 266:  */
 267:     public static function resourceMap($resourceMap = null) {
 268:         if ($resourceMap === null) {
 269:             return static::$_resourceMap;
 270:         }
 271:         static::$_resourceMap = $resourceMap;
 272:     }
 273: 
 274: /**
 275:  * Connects a new Route in the router.
 276:  *
 277:  * Routes are a way of connecting request URLs to objects in your application. At their core routes
 278:  * are a set of regular expressions that are used to match requests to destinations.
 279:  *
 280:  * Examples:
 281:  *
 282:  * `Router::connect('/:controller/:action/*');`
 283:  *
 284:  * The first token ':controller' will be used as a controller name while the second is used as the action name.
 285:  * the '/*' syntax makes this route greedy in that it will match requests like `/posts/index` as well as requests
 286:  * like `/posts/edit/1/foo/bar`.
 287:  *
 288:  * `Router::connect('/home-page', array('controller' => 'pages', 'action' => 'display', 'home'));`
 289:  *
 290:  * The above shows the use of route parameter defaults, and providing routing parameters for a static route.
 291:  *
 292:  * ```
 293:  * Router::connect(
 294:  *   '/:lang/:controller/:action/:id',
 295:  *   array(),
 296:  *   array('id' => '[0-9]+', 'lang' => '[a-z]{3}')
 297:  * );
 298:  * ```
 299:  *
 300:  * Shows connecting a route with custom route parameters as well as providing patterns for those parameters.
 301:  * Patterns for routing parameters do not need capturing groups, as one will be added for each route params.
 302:  *
 303:  * $defaults is merged with the results of parsing the request URL to form the final routing destination and its
 304:  * parameters. This destination is expressed as an associative array by Router. See the output of {@link parse()}.
 305:  *
 306:  * $options offers four 'special' keys. `pass`, `named`, `persist` and `routeClass`
 307:  * have special meaning in the $options array.
 308:  *
 309:  * - `pass` is used to define which of the routed parameters should be shifted into the pass array. Adding a
 310:  *   parameter to pass will remove it from the regular route array. Ex. `'pass' => array('slug')`
 311:  * - `persist` is used to define which route parameters should be automatically included when generating
 312:  *   new URLs. You can override persistent parameters by redefining them in a URL or remove them by
 313:  *   setting the parameter to `false`. Ex. `'persist' => array('lang')`
 314:  * - `routeClass` is used to extend and change how individual routes parse requests and handle reverse routing,
 315:  *   via a custom routing class. Ex. `'routeClass' => 'SlugRoute'`
 316:  * - `named` is used to configure named parameters at the route level. This key uses the same options
 317:  *   as Router::connectNamed()
 318:  *
 319:  * You can also add additional conditions for matching routes to the $defaults array.
 320:  * The following conditions can be used:
 321:  *
 322:  * - `[type]` Only match requests for specific content types.
 323:  * - `[method]` Only match requests with specific HTTP verbs.
 324:  * - `[server]` Only match when $_SERVER['SERVER_NAME'] matches the given value.
 325:  *
 326:  * Example of using the `[method]` condition:
 327:  *
 328:  * `Router::connect('/tasks', array('controller' => 'tasks', 'action' => 'index', '[method]' => 'GET'));`
 329:  *
 330:  * The above route will only be matched for GET requests. POST requests will fail to match this route.
 331:  *
 332:  * @param string $route A string describing the template of the route
 333:  * @param array $defaults An array describing the default route parameters. These parameters will be used by default
 334:  *   and can supply routing parameters that are not dynamic. See above.
 335:  * @param array $options An array matching the named elements in the route to regular expressions which that
 336:  *   element should match. Also contains additional parameters such as which routed parameters should be
 337:  *   shifted into the passed arguments, supplying patterns for routing parameters and supplying the name of a
 338:  *   custom routing class.
 339:  * @see routes
 340:  * @see parse().
 341:  * @return array Array of routes
 342:  * @throws RouterException
 343:  */
 344:     public static function connect($route, $defaults = array(), $options = array()) {
 345:         static::$initialized = true;
 346: 
 347:         foreach (static::$_prefixes as $prefix) {
 348:             if (isset($defaults[$prefix])) {
 349:                 if ($defaults[$prefix]) {
 350:                     $defaults['prefix'] = $prefix;
 351:                 } else {
 352:                     unset($defaults[$prefix]);
 353:                 }
 354:                 break;
 355:             }
 356:         }
 357:         if (isset($defaults['prefix']) && !in_array($defaults['prefix'], static::$_prefixes)) {
 358:             static::$_prefixes[] = $defaults['prefix'];
 359:         }
 360:         $defaults += array('plugin' => null);
 361:         if (empty($options['action'])) {
 362:             $defaults += array('action' => 'index');
 363:         }
 364:         $routeClass = static::$_routeClass;
 365:         if (isset($options['routeClass'])) {
 366:             if (strpos($options['routeClass'], '.') === false) {
 367:                 $routeClass = $options['routeClass'];
 368:             } else {
 369:                 list(, $routeClass) = pluginSplit($options['routeClass'], true);
 370:             }
 371:             $routeClass = static::_validateRouteClass($routeClass);
 372:             unset($options['routeClass']);
 373:         }
 374:         if ($routeClass === 'RedirectRoute' && isset($defaults['redirect'])) {
 375:             $defaults = $defaults['redirect'];
 376:         }
 377:         static::$routes[] = new $routeClass($route, $defaults, $options);
 378:         return static::$routes;
 379:     }
 380: 
 381: /**
 382:  * Connects a new redirection Route in the router.
 383:  *
 384:  * Redirection routes are different from normal routes as they perform an actual
 385:  * header redirection if a match is found. The redirection can occur within your
 386:  * application or redirect to an outside location.
 387:  *
 388:  * Examples:
 389:  *
 390:  * `Router::redirect('/home/*', array('controller' => 'posts', 'action' => 'view'), array('persist' => true));`
 391:  *
 392:  * Redirects /home/* to /posts/view and passes the parameters to /posts/view. Using an array as the
 393:  * redirect destination allows you to use other routes to define where a URL string should be redirected to.
 394:  *
 395:  * `Router::redirect('/posts/*', 'http://google.com', array('status' => 302));`
 396:  *
 397:  * Redirects /posts/* to http://google.com with a HTTP status of 302
 398:  *
 399:  * ### Options:
 400:  *
 401:  * - `status` Sets the HTTP status (default 301)
 402:  * - `persist` Passes the params to the redirected route, if it can. This is useful with greedy routes,
 403:  *   routes that end in `*` are greedy. As you can remap URLs and not loose any passed/named args.
 404:  *
 405:  * @param string $route A string describing the template of the route
 406:  * @param array $url A URL to redirect to. Can be a string or a CakePHP array-based URL
 407:  * @param array $options An array matching the named elements in the route to regular expressions which that
 408:  *   element should match. Also contains additional parameters such as which routed parameters should be
 409:  *   shifted into the passed arguments. As well as supplying patterns for routing parameters.
 410:  * @see routes
 411:  * @return array Array of routes
 412:  */
 413:     public static function redirect($route, $url, $options = array()) {
 414:         App::uses('RedirectRoute', 'Routing/Route');
 415:         $options['routeClass'] = 'RedirectRoute';
 416:         if (is_string($url)) {
 417:             $url = array('redirect' => $url);
 418:         }
 419:         return static::connect($route, $url, $options);
 420:     }
 421: 
 422: /**
 423:  * Specifies what named parameters CakePHP should be parsing out of incoming URLs. By default
 424:  * CakePHP will parse every named parameter out of incoming URLs. However, if you want to take more
 425:  * control over how named parameters are parsed you can use one of the following setups:
 426:  *
 427:  * Do not parse any named parameters:
 428:  *
 429:  * ``` Router::connectNamed(false); ```
 430:  *
 431:  * Parse only default parameters used for CakePHP's pagination:
 432:  *
 433:  * ``` Router::connectNamed(false, array('default' => true)); ```
 434:  *
 435:  * Parse only the page parameter if its value is a number:
 436:  *
 437:  * ``` Router::connectNamed(array('page' => '[\d]+'), array('default' => false, 'greedy' => false)); ```
 438:  *
 439:  * Parse only the page parameter no matter what.
 440:  *
 441:  * ``` Router::connectNamed(array('page'), array('default' => false, 'greedy' => false)); ```
 442:  *
 443:  * Parse only the page parameter if the current action is 'index'.
 444:  *
 445:  * ```
 446:  * Router::connectNamed(
 447:  *    array('page' => array('action' => 'index')),
 448:  *    array('default' => false, 'greedy' => false)
 449:  * );
 450:  * ```
 451:  *
 452:  * Parse only the page parameter if the current action is 'index' and the controller is 'pages'.
 453:  *
 454:  * ```
 455:  * Router::connectNamed(
 456:  *    array('page' => array('action' => 'index', 'controller' => 'pages')),
 457:  *    array('default' => false, 'greedy' => false)
 458:  * );
 459:  * ```
 460:  *
 461:  * ### Options
 462:  *
 463:  * - `greedy` Setting this to true will make Router parse all named params. Setting it to false will
 464:  *    parse only the connected named params.
 465:  * - `default` Set this to true to merge in the default set of named parameters.
 466:  * - `reset` Set to true to clear existing rules and start fresh.
 467:  * - `separator` Change the string used to separate the key & value in a named parameter. Defaults to `:`
 468:  *
 469:  * @param array $named A list of named parameters. Key value pairs are accepted where values are
 470:  *    either regex strings to match, or arrays as seen above.
 471:  * @param array $options Allows to control all settings: separator, greedy, reset, default
 472:  * @return array
 473:  */
 474:     public static function connectNamed($named, $options = array()) {
 475:         if (isset($options['separator'])) {
 476:             static::$_namedConfig['separator'] = $options['separator'];
 477:             unset($options['separator']);
 478:         }
 479: 
 480:         if ($named === true || $named === false) {
 481:             $options += array('default' => $named, 'reset' => true, 'greedy' => $named);
 482:             $named = array();
 483:         } else {
 484:             $options += array('default' => false, 'reset' => false, 'greedy' => true);
 485:         }
 486: 
 487:         if ($options['reset'] || static::$_namedConfig['rules'] === false) {
 488:             static::$_namedConfig['rules'] = array();
 489:         }
 490: 
 491:         if ($options['default']) {
 492:             $named = array_merge($named, static::$_namedConfig['default']);
 493:         }
 494: 
 495:         foreach ($named as $key => $val) {
 496:             if (is_numeric($key)) {
 497:                 static::$_namedConfig['rules'][$val] = true;
 498:             } else {
 499:                 static::$_namedConfig['rules'][$key] = $val;
 500:             }
 501:         }
 502:         static::$_namedConfig['greedyNamed'] = $options['greedy'];
 503:         return static::$_namedConfig;
 504:     }
 505: 
 506: /**
 507:  * Gets the current named parameter configuration values.
 508:  *
 509:  * @return array
 510:  * @see Router::$_namedConfig
 511:  */
 512:     public static function namedConfig() {
 513:         return static::$_namedConfig;
 514:     }
 515: 
 516: /**
 517:  * Creates REST resource routes for the given controller(s). When creating resource routes
 518:  * for a plugin, by default the prefix will be changed to the lower_underscore version of the plugin
 519:  * name. By providing a prefix you can override this behavior.
 520:  *
 521:  * ### Options:
 522:  *
 523:  * - 'id' - The regular expression fragment to use when matching IDs. By default, matches
 524:  *    integer values and UUIDs.
 525:  * - 'prefix' - URL prefix to use for the generated routes. Defaults to '/'.
 526:  * - 'connectOptions' – Custom options for connecting the routes.
 527:  *
 528:  * @param string|array $controller A controller name or array of controller names (i.e. "Posts" or "ListItems")
 529:  * @param array $options Options to use when generating REST routes
 530:  * @return array Array of mapped resources
 531:  */
 532:     public static function mapResources($controller, $options = array()) {
 533:         $hasPrefix = isset($options['prefix']);
 534:         $options += array(
 535:             'connectOptions' => array(),
 536:             'prefix' => '/',
 537:             'id' => static::ID . '|' . static::UUID
 538:         );
 539: 
 540:         $prefix = $options['prefix'];
 541:         $connectOptions = $options['connectOptions'];
 542:         unset($options['connectOptions']);
 543:         if (strpos($prefix, '/') !== 0) {
 544:             $prefix = '/' . $prefix;
 545:         }
 546:         if (substr($prefix, -1) !== '/') {
 547:             $prefix .= '/';
 548:         }
 549: 
 550:         foreach ((array)$controller as $name) {
 551:             list($plugin, $name) = pluginSplit($name);
 552:             $urlName = Inflector::underscore($name);
 553:             $plugin = Inflector::underscore($plugin);
 554:             if ($plugin && !$hasPrefix) {
 555:                 $prefix = '/' . $plugin . '/';
 556:             }
 557: 
 558:             foreach (static::$_resourceMap as $params) {
 559:                 $url = $prefix . $urlName . (($params['id']) ? '/:id' : '');
 560: 
 561:                 Router::connect($url,
 562:                     array(
 563:                         'plugin' => $plugin,
 564:                         'controller' => $urlName,
 565:                         'action' => $params['action'],
 566:                         '[method]' => $params['method']
 567:                     ),
 568:                     array_merge(
 569:                         array('id' => $options['id'], 'pass' => array('id')),
 570:                         $connectOptions
 571:                     )
 572:                 );
 573:             }
 574:             static::$_resourceMapped[] = $urlName;
 575:         }
 576:         return static::$_resourceMapped;
 577:     }
 578: 
 579: /**
 580:  * Returns the list of prefixes used in connected routes
 581:  *
 582:  * @return array A list of prefixes used in connected routes
 583:  */
 584:     public static function prefixes() {
 585:         return static::$_prefixes;
 586:     }
 587: 
 588: /**
 589:  * Parses given URL string. Returns 'routing' parameters for that URL.
 590:  *
 591:  * @param string $url URL to be parsed
 592:  * @return array Parsed elements from URL
 593:  */
 594:     public static function parse($url) {
 595:         if (!static::$initialized) {
 596:             static::_loadRoutes();
 597:         }
 598: 
 599:         $ext = null;
 600:         $out = array();
 601: 
 602:         if (strlen($url) && strpos($url, '/') !== 0) {
 603:             $url = '/' . $url;
 604:         }
 605:         if (strpos($url, '?') !== false) {
 606:             list($url, $queryParameters) = explode('?', $url, 2);
 607:             parse_str($queryParameters, $queryParameters);
 608:         }
 609: 
 610:         extract(static::_parseExtension($url));
 611: 
 612:         foreach (static::$routes as $route) {
 613:             if (($r = $route->parse($url)) !== false) {
 614:                 static::$_currentRoute[] = $route;
 615:                 $out = $r;
 616:                 break;
 617:             }
 618:         }
 619:         if (isset($out['prefix'])) {
 620:             $out['action'] = $out['prefix'] . '_' . $out['action'];
 621:         }
 622: 
 623:         if (!empty($ext) && !isset($out['ext'])) {
 624:             $out['ext'] = $ext;
 625:         }
 626: 
 627:         if (!empty($queryParameters) && !isset($out['?'])) {
 628:             $out['?'] = $queryParameters;
 629:         }
 630:         return $out;
 631:     }
 632: 
 633: /**
 634:  * Parses a file extension out of a URL, if Router::parseExtensions() is enabled.
 635:  *
 636:  * @param string $url URL.
 637:  * @return array Returns an array containing the altered URL and the parsed extension.
 638:  */
 639:     protected static function _parseExtension($url) {
 640:         $ext = null;
 641: 
 642:         if (static::$_parseExtensions) {
 643:             if (preg_match('/\.[0-9a-zA-Z]*$/', $url, $match) === 1) {
 644:                 $match = substr($match[0], 1);
 645:                 if (empty(static::$_validExtensions)) {
 646:                     $url = substr($url, 0, strpos($url, '.' . $match));
 647:                     $ext = $match;
 648:                 } else {
 649:                     foreach (static::$_validExtensions as $name) {
 650:                         if (strcasecmp($name, $match) === 0) {
 651:                             $url = substr($url, 0, strpos($url, '.' . $name));
 652:                             $ext = $match;
 653:                             break;
 654:                         }
 655:                     }
 656:                 }
 657:             }
 658:         }
 659:         return compact('ext', 'url');
 660:     }
 661: 
 662: /**
 663:  * Takes parameter and path information back from the Dispatcher, sets these
 664:  * parameters as the current request parameters that are merged with URL arrays
 665:  * created later in the request.
 666:  *
 667:  * Nested requests will create a stack of requests. You can remove requests using
 668:  * Router::popRequest(). This is done automatically when using CakeObject::requestAction().
 669:  *
 670:  * Will accept either a CakeRequest object or an array of arrays. Support for
 671:  * accepting arrays may be removed in the future.
 672:  *
 673:  * @param CakeRequest|array $request Parameters and path information or a CakeRequest object.
 674:  * @return void
 675:  */
 676:     public static function setRequestInfo($request) {
 677:         if ($request instanceof CakeRequest) {
 678:             static::$_requests[] = $request;
 679:         } else {
 680:             $requestObj = new CakeRequest();
 681:             $request += array(array(), array());
 682:             $request[0] += array('controller' => false, 'action' => false, 'plugin' => null);
 683:             $requestObj->addParams($request[0])->addPaths($request[1]);
 684:             static::$_requests[] = $requestObj;
 685:         }
 686:     }
 687: 
 688: /**
 689:  * Pops a request off of the request stack. Used when doing requestAction
 690:  *
 691:  * @return CakeRequest The request removed from the stack.
 692:  * @see Router::setRequestInfo()
 693:  * @see Object::requestAction()
 694:  */
 695:     public static function popRequest() {
 696:         return array_pop(static::$_requests);
 697:     }
 698: 
 699: /**
 700:  * Gets the current request object, or the first one.
 701:  *
 702:  * @param bool $current True to get the current request object, or false to get the first one.
 703:  * @return CakeRequest|null Null if stack is empty.
 704:  */
 705:     public static function getRequest($current = false) {
 706:         if ($current) {
 707:             $i = count(static::$_requests) - 1;
 708:             return isset(static::$_requests[$i]) ? static::$_requests[$i] : null;
 709:         }
 710:         return isset(static::$_requests[0]) ? static::$_requests[0] : null;
 711:     }
 712: 
 713: /**
 714:  * Gets parameter information
 715:  *
 716:  * @param bool $current Get current request parameter, useful when using requestAction
 717:  * @return array Parameter information
 718:  */
 719:     public static function getParams($current = false) {
 720:         if ($current && static::$_requests) {
 721:             return static::$_requests[count(static::$_requests) - 1]->params;
 722:         }
 723:         if (isset(static::$_requests[0])) {
 724:             return static::$_requests[0]->params;
 725:         }
 726:         return array();
 727:     }
 728: 
 729: /**
 730:  * Gets URL parameter by name
 731:  *
 732:  * @param string $name Parameter name
 733:  * @param bool $current Current parameter, useful when using requestAction
 734:  * @return string|null Parameter value
 735:  */
 736:     public static function getParam($name = 'controller', $current = false) {
 737:         $params = Router::getParams($current);
 738:         if (isset($params[$name])) {
 739:             return $params[$name];
 740:         }
 741:         return null;
 742:     }
 743: 
 744: /**
 745:  * Gets path information
 746:  *
 747:  * @param bool $current Current parameter, useful when using requestAction
 748:  * @return array
 749:  */
 750:     public static function getPaths($current = false) {
 751:         if ($current) {
 752:             return static::$_requests[count(static::$_requests) - 1];
 753:         }
 754:         if (!isset(static::$_requests[0])) {
 755:             return array('base' => null);
 756:         }
 757:         return array('base' => static::$_requests[0]->base);
 758:     }
 759: 
 760: /**
 761:  * Reloads default Router settings. Resets all class variables and
 762:  * removes all connected routes.
 763:  *
 764:  * @return void
 765:  */
 766:     public static function reload() {
 767:         if (empty(static::$_initialState)) {
 768:             static::$_initialState = get_class_vars('Router');
 769:             static::_setPrefixes();
 770:             return;
 771:         }
 772:         foreach (static::$_initialState as $key => $val) {
 773:             if ($key !== '_initialState') {
 774:                 static::${$key} = $val;
 775:             }
 776:         }
 777:         static::_setPrefixes();
 778:     }
 779: 
 780: /**
 781:  * Promote a route (by default, the last one added) to the beginning of the list
 782:  *
 783:  * @param int $which A zero-based array index representing the route to move. For example,
 784:  *    if 3 routes have been added, the last route would be 2.
 785:  * @return bool Returns false if no route exists at the position specified by $which.
 786:  */
 787:     public static function promote($which = null) {
 788:         if ($which === null) {
 789:             $which = count(static::$routes) - 1;
 790:         }
 791:         if (!isset(static::$routes[$which])) {
 792:             return false;
 793:         }
 794:         $route =& static::$routes[$which];
 795:         unset(static::$routes[$which]);
 796:         array_unshift(static::$routes, $route);
 797:         return true;
 798:     }
 799: 
 800: /**
 801:  * Finds URL for specified action.
 802:  *
 803:  * Returns a URL pointing to a combination of controller and action. Param
 804:  * $url can be:
 805:  *
 806:  * - Empty - the method will find address to actual controller/action.
 807:  * - '/' - the method will find base URL of application.
 808:  * - A combination of controller/action - the method will find URL for it.
 809:  *
 810:  * There are a few 'special' parameters that can change the final URL string that is generated
 811:  *
 812:  * - `base` - Set to false to remove the base path from the generated URL. If your application
 813:  *   is not in the root directory, this can be used to generate URLs that are 'cake relative'.
 814:  *   cake relative URLs are required when using requestAction.
 815:  * - `?` - Takes an array of query string parameters
 816:  * - `#` - Allows you to set URL hash fragments.
 817:  * - `full_base` - If true the `Router::fullBaseUrl()` value will be prepended to generated URLs.
 818:  *
 819:  * @param string|array $url Cake-relative URL, like "/products/edit/92" or "/presidents/elect/4"
 820:  *   or an array specifying any of the following: 'controller', 'action',
 821:  *   and/or 'plugin', in addition to named arguments (keyed array elements),
 822:  *   and standard URL arguments (indexed array elements)
 823:  * @param bool|array $full If (bool) true, the full base URL will be prepended to the result.
 824:  *   If an array accepts the following keys
 825:  *    - escape - used when making URLs embedded in html escapes query string '&'
 826:  *    - full - if true the full base URL will be prepended.
 827:  * @return string Full translated URL with base path.
 828:  */
 829:     public static function url($url = null, $full = false) {
 830:         if (!static::$initialized) {
 831:             static::_loadRoutes();
 832:         }
 833: 
 834:         $params = array('plugin' => null, 'controller' => null, 'action' => 'index');
 835: 
 836:         if (is_bool($full)) {
 837:             $escape = false;
 838:         } else {
 839:             extract($full + array('escape' => false, 'full' => false));
 840:         }
 841: 
 842:         $path = array('base' => null);
 843:         if (!empty(static::$_requests)) {
 844:             $request = static::$_requests[count(static::$_requests) - 1];
 845:             $params = $request->params;
 846:             $path = array('base' => $request->base, 'here' => $request->here);
 847:         }
 848:         if (empty($path['base'])) {
 849:             $path['base'] = Configure::read('App.base');
 850:         }
 851: 
 852:         $base = $path['base'];
 853:         $extension = $output = $q = $frag = null;
 854: 
 855:         if (empty($url)) {
 856:             $output = isset($path['here']) ? $path['here'] : '/';
 857:             if ($full) {
 858:                 $output = static::fullBaseUrl() . $output;
 859:             }
 860:             return $output;
 861:         } elseif (is_array($url)) {
 862:             if (isset($url['base']) && $url['base'] === false) {
 863:                 $base = null;
 864:                 unset($url['base']);
 865:             }
 866:             if (isset($url['full_base']) && $url['full_base'] === true) {
 867:                 $full = true;
 868:                 unset($url['full_base']);
 869:             }
 870:             if (isset($url['?'])) {
 871:                 $q = $url['?'];
 872:                 unset($url['?']);
 873:             }
 874:             if (isset($url['#'])) {
 875:                 $frag = '#' . $url['#'];
 876:                 unset($url['#']);
 877:             }
 878:             if (isset($url['ext'])) {
 879:                 $extension = '.' . $url['ext'];
 880:                 unset($url['ext']);
 881:             }
 882:             if (empty($url['action'])) {
 883:                 if (empty($url['controller']) || $params['controller'] === $url['controller']) {
 884:                     $url['action'] = $params['action'];
 885:                 } else {
 886:                     $url['action'] = 'index';
 887:                 }
 888:             }
 889: 
 890:             $prefixExists = (array_intersect_key($url, array_flip(static::$_prefixes)));
 891:             foreach (static::$_prefixes as $prefix) {
 892:                 if (!empty($params[$prefix]) && !$prefixExists) {
 893:                     $url[$prefix] = true;
 894:                 } elseif (isset($url[$prefix]) && !$url[$prefix]) {
 895:                     unset($url[$prefix]);
 896:                 }
 897:                 if (isset($url[$prefix]) && strpos($url['action'], $prefix . '_') === 0) {
 898:                     $url['action'] = substr($url['action'], strlen($prefix) + 1);
 899:                 }
 900:             }
 901: 
 902:             $url += array('controller' => $params['controller'], 'plugin' => $params['plugin']);
 903: 
 904:             $match = false;
 905: 
 906:             foreach (static::$routes as $route) {
 907:                 $originalUrl = $url;
 908: 
 909:                 $url = $route->persistParams($url, $params);
 910: 
 911:                 if ($match = $route->match($url)) {
 912:                     $output = trim($match, '/');
 913:                     break;
 914:                 }
 915:                 $url = $originalUrl;
 916:             }
 917:             if ($match === false) {
 918:                 $output = static::_handleNoRoute($url);
 919:             }
 920:         } else {
 921:             if (preg_match('/^([a-z][a-z0-9.+\-]+:|:?\/\/|[#?])/i', $url)) {
 922:                 return $url;
 923:             }
 924:             if (substr($url, 0, 1) === '/') {
 925:                 $output = substr($url, 1);
 926:             } else {
 927:                 foreach (static::$_prefixes as $prefix) {
 928:                     if (isset($params[$prefix])) {
 929:                         $output .= $prefix . '/';
 930:                         break;
 931:                     }
 932:                 }
 933:                 if (!empty($params['plugin']) && $params['plugin'] !== $params['controller']) {
 934:                     $output .= Inflector::underscore($params['plugin']) . '/';
 935:                 }
 936:                 $output .= Inflector::underscore($params['controller']) . '/' . $url;
 937:             }
 938:         }
 939:         $protocol = preg_match('#^[a-z][a-z0-9+\-.]*\://#i', $output);
 940:         if ($protocol === 0) {
 941:             $output = str_replace('//', '/', $base . '/' . $output);
 942: 
 943:             if ($full) {
 944:                 $output = static::fullBaseUrl() . $output;
 945:             }
 946:             if (!empty($extension)) {
 947:                 $output = rtrim($output, '/');
 948:             }
 949:         }
 950:         return $output . $extension . static::queryString($q, array(), $escape) . $frag;
 951:     }
 952: 
 953: /**
 954:  * Sets the full base URL that will be used as a prefix for generating
 955:  * fully qualified URLs for this application. If no parameters are passed,
 956:  * the currently configured value is returned.
 957:  *
 958:  * ## Note:
 959:  *
 960:  * If you change the configuration value ``App.fullBaseUrl`` during runtime
 961:  * and expect the router to produce links using the new setting, you are
 962:  * required to call this method passing such value again.
 963:  *
 964:  * @param string $base the prefix for URLs generated containing the domain.
 965:  * For example: ``http://example.com``
 966:  * @return string
 967:  */
 968:     public static function fullBaseUrl($base = null) {
 969:         if ($base !== null) {
 970:             static::$_fullBaseUrl = $base;
 971:             Configure::write('App.fullBaseUrl', $base);
 972:         }
 973:         if (empty(static::$_fullBaseUrl)) {
 974:             static::$_fullBaseUrl = Configure::read('App.fullBaseUrl');
 975:         }
 976:         return static::$_fullBaseUrl;
 977:     }
 978: 
 979: /**
 980:  * A special fallback method that handles URL arrays that cannot match
 981:  * any defined routes.
 982:  *
 983:  * @param array $url A URL that didn't match any routes
 984:  * @return string A generated URL for the array
 985:  * @see Router::url()
 986:  */
 987:     protected static function _handleNoRoute($url) {
 988:         $named = $args = array();
 989:         $skip = array_merge(
 990:             array('bare', 'action', 'controller', 'plugin', 'prefix'),
 991:             static::$_prefixes
 992:         );
 993: 
 994:         $keys = array_values(array_diff(array_keys($url), $skip));
 995: 
 996:         // Remove this once parsed URL parameters can be inserted into 'pass'
 997:         foreach ($keys as $key) {
 998:             if (is_numeric($key)) {
 999:                 $args[] = $url[$key];
1000:             } else {
1001:                 $named[$key] = $url[$key];
1002:             }
1003:         }
1004: 
1005:         list($args, $named) = array(Hash::filter($args), Hash::filter($named));
1006:         foreach (static::$_prefixes as $prefix) {
1007:             $prefixed = $prefix . '_';
1008:             if (!empty($url[$prefix]) && strpos($url['action'], $prefixed) === 0) {
1009:                 $url['action'] = substr($url['action'], strlen($prefixed) * -1);
1010:                 break;
1011:             }
1012:         }
1013: 
1014:         if (empty($named) && empty($args) && (!isset($url['action']) || $url['action'] === 'index')) {
1015:             $url['action'] = null;
1016:         }
1017: 
1018:         $urlOut = array_filter(array($url['controller'], $url['action']));
1019: 
1020:         if (isset($url['plugin'])) {
1021:             array_unshift($urlOut, $url['plugin']);
1022:         }
1023: 
1024:         foreach (static::$_prefixes as $prefix) {
1025:             if (isset($url[$prefix])) {
1026:                 array_unshift($urlOut, $prefix);
1027:                 break;
1028:             }
1029:         }
1030:         $output = implode('/', $urlOut);
1031: 
1032:         if (!empty($args)) {
1033:             $output .= '/' . implode('/', array_map('rawurlencode', $args));
1034:         }
1035: 
1036:         if (!empty($named)) {
1037:             foreach ($named as $name => $value) {
1038:                 if (is_array($value)) {
1039:                     $flattend = Hash::flatten($value, '%5D%5B');
1040:                     foreach ($flattend as $namedKey => $namedValue) {
1041:                         $output .= '/' . $name . "%5B{$namedKey}%5D" . static::$_namedConfig['separator'] . rawurlencode($namedValue);
1042:                     }
1043:                 } else {
1044:                     $output .= '/' . $name . static::$_namedConfig['separator'] . rawurlencode($value);
1045:                 }
1046:             }
1047:         }
1048:         return $output;
1049:     }
1050: 
1051: /**
1052:  * Generates a well-formed querystring from $q
1053:  *
1054:  * @param string|array $q Query string Either a string of already compiled query string arguments or
1055:  *    an array of arguments to convert into a query string.
1056:  * @param array $extra Extra querystring parameters.
1057:  * @param bool $escape Whether or not to use escaped &
1058:  * @return string|null
1059:  */
1060:     public static function queryString($q, $extra = array(), $escape = false) {
1061:         if (empty($q) && empty($extra)) {
1062:             return null;
1063:         }
1064:         $join = '&';
1065:         if ($escape === true) {
1066:             $join = '&amp;';
1067:         }
1068:         $out = '';
1069: 
1070:         if (is_array($q)) {
1071:             $q = array_merge($q, $extra);
1072:         } else {
1073:             $out = $q;
1074:             $q = $extra;
1075:         }
1076:         $addition = http_build_query($q, null, $join);
1077: 
1078:         if ($out && $addition && substr($out, strlen($join) * -1, strlen($join)) !== $join) {
1079:             $out .= $join;
1080:         }
1081: 
1082:         $out .= $addition;
1083: 
1084:         if (isset($out[0]) && $out[0] !== '?') {
1085:             $out = '?' . $out;
1086:         }
1087:         return $out;
1088:     }
1089: 
1090: /**
1091:  * Reverses a parsed parameter array into an array.
1092:  *
1093:  * Works similarly to Router::url(), but since parsed URL's contain additional
1094:  * 'pass' and 'named' as well as 'url.url' keys. Those keys need to be specially
1095:  * handled in order to reverse a params array into a string URL.
1096:  *
1097:  * This will strip out 'autoRender', 'bare', 'requested', and 'return' param names as those
1098:  * are used for CakePHP internals and should not normally be part of an output URL.
1099:  *
1100:  * @param CakeRequest|array $params The params array or CakeRequest object that needs to be reversed.
1101:  * @return array The URL array ready to be used for redirect or HTML link.
1102:  */
1103:     public static function reverseToArray($params) {
1104:         if ($params instanceof CakeRequest) {
1105:             $url = $params->query;
1106:             $params = $params->params;
1107:         } else {
1108:             $url = $params['url'];
1109:         }
1110:         $pass = isset($params['pass']) ? $params['pass'] : array();
1111:         $named = isset($params['named']) ? $params['named'] : array();
1112:         unset(
1113:             $params['pass'], $params['named'], $params['paging'], $params['models'], $params['url'], $url['url'],
1114:             $params['autoRender'], $params['bare'], $params['requested'], $params['return'],
1115:             $params['_Token']
1116:         );
1117:         $params = array_merge($params, $pass, $named);
1118:         if (!empty($url)) {
1119:             $params['?'] = $url;
1120:         }
1121:         return $params;
1122:     }
1123: 
1124: /**
1125:  * Reverses a parsed parameter array into a string.
1126:  *
1127:  * Works similarly to Router::url(), but since parsed URL's contain additional
1128:  * 'pass' and 'named' as well as 'url.url' keys. Those keys need to be specially
1129:  * handled in order to reverse a params array into a string URL.
1130:  *
1131:  * This will strip out 'autoRender', 'bare', 'requested', and 'return' param names as those
1132:  * are used for CakePHP internals and should not normally be part of an output URL.
1133:  *
1134:  * @param CakeRequest|array $params The params array or CakeRequest object that needs to be reversed.
1135:  * @param bool $full Set to true to include the full URL including the protocol when reversing
1136:  *     the URL.
1137:  * @return string The string that is the reversed result of the array
1138:  */
1139:     public static function reverse($params, $full = false) {
1140:         $params = Router::reverseToArray($params, $full);
1141:         return Router::url($params, $full);
1142:     }
1143: 
1144: /**
1145:  * Normalizes a URL for purposes of comparison.
1146:  *
1147:  * Will strip the base path off and replace any double /'s.
1148:  * It will not unify the casing and underscoring of the input value.
1149:  *
1150:  * @param array|string $url URL to normalize Either an array or a string URL.
1151:  * @return string Normalized URL
1152:  */
1153:     public static function normalize($url = '/') {
1154:         if (is_array($url)) {
1155:             $url = Router::url($url);
1156:         }
1157:         if (preg_match('/^[a-z\-]+:\/\//', $url)) {
1158:             return $url;
1159:         }
1160:         $request = Router::getRequest();
1161: 
1162:         if (!empty($request->base) && stristr($url, $request->base)) {
1163:             $url = preg_replace('/^' . preg_quote($request->base, '/') . '/', '', $url, 1);
1164:         }
1165:         $url = '/' . $url;
1166: 
1167:         while (strpos($url, '//') !== false) {
1168:             $url = str_replace('//', '/', $url);
1169:         }
1170:         $url = preg_replace('/(?:(\/$))/', '', $url);
1171: 
1172:         if (empty($url)) {
1173:             return '/';
1174:         }
1175:         return $url;
1176:     }
1177: 
1178: /**
1179:  * Returns the route matching the current request URL.
1180:  *
1181:  * @return CakeRoute Matching route object.
1182:  */
1183:     public static function requestRoute() {
1184:         return static::$_currentRoute[0];
1185:     }
1186: 
1187: /**
1188:  * Returns the route matching the current request (useful for requestAction traces)
1189:  *
1190:  * @return CakeRoute Matching route object.
1191:  */
1192:     public static function currentRoute() {
1193:         $count = count(static::$_currentRoute) - 1;
1194:         return ($count >= 0) ? static::$_currentRoute[$count] : false;
1195:     }
1196: 
1197: /**
1198:  * Removes the plugin name from the base URL.
1199:  *
1200:  * @param string $base Base URL
1201:  * @param string $plugin Plugin name
1202:  * @return string base URL with plugin name removed if present
1203:  */
1204:     public static function stripPlugin($base, $plugin = null) {
1205:         if ($plugin) {
1206:             $base = preg_replace('/(?:' . $plugin . ')/', '', $base);
1207:             $base = str_replace('//', '', $base);
1208:             $pos1 = strrpos($base, '/');
1209:             $char = strlen($base) - 1;
1210: 
1211:             if ($pos1 === $char) {
1212:                 $base = substr($base, 0, $char);
1213:             }
1214:         }
1215:         return $base;
1216:     }
1217: 
1218: /**
1219:  * Instructs the router to parse out file extensions from the URL.
1220:  *
1221:  * For example, http://example.com/posts.rss would yield a file extension of "rss".
1222:  * The file extension itself is made available in the controller as
1223:  * `$this->params['ext']`, and is used by the RequestHandler component to
1224:  * automatically switch to alternate layouts and templates, and load helpers
1225:  * corresponding to the given content, i.e. RssHelper. Switching layouts and helpers
1226:  * requires that the chosen extension has a defined mime type in `CakeResponse`
1227:  *
1228:  * A list of valid extension can be passed to this method, i.e. Router::parseExtensions('rss', 'xml');
1229:  * If no parameters are given, anything after the first . (dot) after the last / in the URL will be
1230:  * parsed, excluding querystring parameters (i.e. ?q=...).
1231:  *
1232:  * @return void
1233:  * @see RequestHandler::startup()
1234:  */
1235:     public static function parseExtensions() {
1236:         static::$_parseExtensions = true;
1237:         if (func_num_args() > 0) {
1238:             static::setExtensions(func_get_args(), false);
1239:         }
1240:     }
1241: 
1242: /**
1243:  * Get the list of extensions that can be parsed by Router.
1244:  *
1245:  * To initially set extensions use `Router::parseExtensions()`
1246:  * To add more see `setExtensions()`
1247:  *
1248:  * @return array Array of extensions Router is configured to parse.
1249:  */
1250:     public static function extensions() {
1251:         if (!static::$initialized) {
1252:             static::_loadRoutes();
1253:         }
1254: 
1255:         return static::$_validExtensions;
1256:     }
1257: 
1258: /**
1259:  * Set/add valid extensions.
1260:  *
1261:  * To have the extensions parsed you still need to call `Router::parseExtensions()`
1262:  *
1263:  * @param array $extensions List of extensions to be added as valid extension
1264:  * @param bool $merge Default true will merge extensions. Set to false to override current extensions
1265:  * @return array
1266:  */
1267:     public static function setExtensions($extensions, $merge = true) {
1268:         if (!is_array($extensions)) {
1269:             return static::$_validExtensions;
1270:         }
1271:         if (!$merge) {
1272:             return static::$_validExtensions = $extensions;
1273:         }
1274:         return static::$_validExtensions = array_merge(static::$_validExtensions, $extensions);
1275:     }
1276: 
1277: /**
1278:  * Loads route configuration
1279:  *
1280:  * @return void
1281:  */
1282:     protected static function _loadRoutes() {
1283:         static::$initialized = true;
1284:         include CONFIG . 'routes.php';
1285:     }
1286: 
1287: }
1288: 
1289: //Save the initial state
1290: Router::reload();
1291: 
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