Subversion Repositories SmartDukaan

<?php
/**
 * CakeRequest
 *
 * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 * @link          http://cakephp.org CakePHP(tm) Project
 * @since         CakePHP(tm) v 2.0
 * @license       http://www.opensource.org/licenses/mit-license.php MIT License
 */

App::uses('Hash', 'Utility');

/**
 * A class that helps wrap Request information and particulars about a single request.
 * Provides methods commonly used to introspect on the request headers and request body.
 *
 * Has both an Array and Object interface. You can access framework parameters using indexes:
 *
 * `$request['controller']` or `$request->controller`.
 *
 * @package       Cake.Network
 */
class CakeRequest implements ArrayAccess {

/**
 * Array of parameters parsed from the URL.
 *
 * @var array
 */
        public $params = array(
                'plugin' => null,
                'controller' => null,
                'action' => null,
                'named' => array(),
                'pass' => array(),
        );

/**
 * Array of POST data. Will contain form data as well as uploaded files.
 * Inputs prefixed with 'data' will have the data prefix removed. If there is
 * overlap between an input prefixed with data and one without, the 'data' prefixed
 * value will take precedence.
 *
 * @var array
 */
        public $data = array();

/**
 * Array of querystring arguments
 *
 * @var array
 */
        public $query = array();

/**
 * The URL string used for the request.
 *
 * @var string
 */
        public $url;

/**
 * Base URL path.
 *
 * @var string
 */
        public $base = false;

/**
 * webroot path segment for the request.
 *
 * @var string
 */
        public $webroot = '/';

/**
 * The full address to the current request
 *
 * @var string
 */
        public $here = null;

/**
 * The built in detectors used with `is()` can be modified with `addDetector()`.
 *
 * There are several ways to specify a detector, see CakeRequest::addDetector() for the
 * various formats and ways to define detectors.
 *
 * @var array
 */
        protected $_detectors = array(
                'get' => array('env' => 'REQUEST_METHOD', 'value' => 'GET'),
                'post' => array('env' => 'REQUEST_METHOD', 'value' => 'POST'),
                'put' => array('env' => 'REQUEST_METHOD', 'value' => 'PUT'),
                'delete' => array('env' => 'REQUEST_METHOD', 'value' => 'DELETE'),
                'head' => array('env' => 'REQUEST_METHOD', 'value' => 'HEAD'),
                'options' => array('env' => 'REQUEST_METHOD', 'value' => 'OPTIONS'),
                'ssl' => array('env' => 'HTTPS', 'value' => 1),
                'ajax' => array('env' => 'HTTP_X_REQUESTED_WITH', 'value' => 'XMLHttpRequest'),
                'flash' => array('env' => 'HTTP_USER_AGENT', 'pattern' => '/^(Shockwave|Adobe) Flash/'),
                'mobile' => array('env' => 'HTTP_USER_AGENT', 'options' => array(
                        'Android', 'AvantGo', 'BlackBerry', 'DoCoMo', 'Fennec', 'iPod', 'iPhone', 'iPad',
                        'J2ME', 'MIDP', 'NetFront', 'Nokia', 'Opera Mini', 'Opera Mobi', 'PalmOS', 'PalmSource',
                        'portalmmm', 'Plucker', 'ReqwirelessWeb', 'SonyEricsson', 'Symbian', 'UP\\.Browser',
                        'webOS', 'Windows CE', 'Windows Phone OS', 'Xiino'
                )),
                'requested' => array('param' => 'requested', 'value' => 1)
        );

/**
 * Copy of php://input. Since this stream can only be read once in most SAPI's
 * keep a copy of it so users don't need to know about that detail.
 *
 * @var string
 */
        protected $_input = '';

/**
 * Constructor
 *
 * @param string $url Trimmed URL string to use. Should not contain the application base path.
 * @param bool $parseEnvironment Set to false to not auto parse the environment. ie. GET, POST and FILES.
 */
        public function __construct($url = null, $parseEnvironment = true) {
                $this->_base();
                if (empty($url)) {
                        $url = $this->_url();
                }
                if ($url[0] === '/') {
                        $url = substr($url, 1);
                }
                $this->url = $url;

                if ($parseEnvironment) {
                        $this->_processPost();
                        $this->_processGet();
                        $this->_processFiles();
                }
                $this->here = $this->base . '/' . $this->url;
        }

/**
 * process the post data and set what is there into the object.
 * processed data is available at `$this->data`
 *
 * Will merge POST vars prefixed with `data`, and ones without
 * into a single array. Variables prefixed with `data` will overwrite those without.
 *
 * If you have mixed POST values be careful not to make any top level keys numeric
 * containing arrays. Hash::merge() is used to merge data, and it has possibly
 * unexpected behavior in this situation.
 *
 * @return void
 */
        protected function _processPost() {
                if ($_POST) {
                        $this->data = $_POST;
                } elseif (
                        ($this->is('put') || $this->is('delete')) &&
                        strpos(env('CONTENT_TYPE'), 'application/x-www-form-urlencoded') === 0
                ) {
                                $data = $this->_readInput();
                                parse_str($data, $this->data);
                }
                if (ini_get('magic_quotes_gpc') === '1') {
                        $this->data = stripslashes_deep($this->data);
                }
                if (env('HTTP_X_HTTP_METHOD_OVERRIDE')) {
                        $this->data['_method'] = env('HTTP_X_HTTP_METHOD_OVERRIDE');
                }
                $isArray = is_array($this->data);
                if ($isArray && isset($this->data['_method'])) {
                        if (!empty($_SERVER)) {
                                $_SERVER['REQUEST_METHOD'] = $this->data['_method'];
                        } else {
                                $_ENV['REQUEST_METHOD'] = $this->data['_method'];
                        }
                        unset($this->data['_method']);
                }
                if ($isArray && isset($this->data['data'])) {
                        $data = $this->data['data'];
                        if (count($this->data) <= 1) {
                                $this->data = $data;
                        } else {
                                unset($this->data['data']);
                                $this->data = Hash::merge($this->data, $data);
                        }
                }
        }

/**
 * Process the GET parameters and move things into the object.
 *
 * @return void
 */
        protected function _processGet() {
                if (ini_get('magic_quotes_gpc') === '1') {
                        $query = stripslashes_deep($_GET);
                } else {
                        $query = $_GET;
                }

                $unsetUrl = '/' . str_replace('.', '_', urldecode($this->url));
                unset($query[$unsetUrl]);
                unset($query[$this->base . $unsetUrl]);
                if (strpos($this->url, '?') !== false) {
                        list(, $querystr) = explode('?', $this->url);
                        parse_str($querystr, $queryArgs);
                        $query += $queryArgs;
                }
                if (isset($this->params['url'])) {
                        $query = array_merge($this->params['url'], $query);
                }
                $this->query = $query;
        }

/**
 * Get the request uri. Looks in PATH_INFO first, as this is the exact value we need prepared
 * by PHP. Following that, REQUEST_URI, PHP_SELF, HTTP_X_REWRITE_URL and argv are checked in that order.
 * Each of these server variables have the base path, and query strings stripped off
 *
 * @return string URI The CakePHP request path that is being accessed.
 */
        protected function _url() {
                if (!empty($_SERVER['PATH_INFO'])) {
                        return $_SERVER['PATH_INFO'];
                } elseif (isset($_SERVER['REQUEST_URI']) && strpos($_SERVER['REQUEST_URI'], '://') === false) {
                        $uri = $_SERVER['REQUEST_URI'];
                } elseif (isset($_SERVER['REQUEST_URI'])) {
                        $qPosition = strpos($_SERVER['REQUEST_URI'], '?');
                        if ($qPosition !== false && strpos($_SERVER['REQUEST_URI'], '://') > $qPosition) {
                                $uri = $_SERVER['REQUEST_URI'];
                        } else {
                                $uri = substr($_SERVER['REQUEST_URI'], strlen(Configure::read('App.fullBaseUrl')));
                        }
                } elseif (isset($_SERVER['PHP_SELF']) && isset($_SERVER['SCRIPT_NAME'])) {
                        $uri = str_replace($_SERVER['SCRIPT_NAME'], '', $_SERVER['PHP_SELF']);
                } elseif (isset($_SERVER['HTTP_X_REWRITE_URL'])) {
                        $uri = $_SERVER['HTTP_X_REWRITE_URL'];
                } elseif ($var = env('argv')) {
                        $uri = $var[0];
                }

                $base = $this->base;

                if (strlen($base) > 0 && strpos($uri, $base) === 0) {
                        $uri = substr($uri, strlen($base));
                }
                if (strpos($uri, '?') !== false) {
                        list($uri) = explode('?', $uri, 2);
                }
                if (empty($uri) || $uri === '/' || $uri === '//' || $uri === '/index.php') {
                        $uri = '/';
                }
                $endsWithIndex = '/webroot/index.php';
                $endsWithLength = strlen($endsWithIndex);
                if (
                        strlen($uri) >= $endsWithLength &&
                        substr($uri, -$endsWithLength) === $endsWithIndex
                ) {
                        $uri = '/';
                }
                return $uri;
        }

/**
 * Returns a base URL and sets the proper webroot
 *
 * If CakePHP is called with index.php in the URL even though
 * URL Rewriting is activated (and thus not needed) it swallows
 * the unnecessary part from $base to prevent issue #3318.
 *
 * @return string Base URL
 * @link https://cakephp.lighthouseapp.com/projects/42648-cakephp/tickets/3318
 */
        protected function _base() {
                $dir = $webroot = null;
                $config = Configure::read('App');
                extract($config);

                if (!isset($base)) {
                        $base = $this->base;
                }
                if ($base !== false) {
                        $this->webroot = $base . '/';
                        return $this->base = $base;
                }

                if (!$baseUrl) {
                        $base = dirname(env('PHP_SELF'));

                        $indexPos = strpos($base, '/webroot/index.php');
                        if ($indexPos !== false) {
                                $base = substr($base, 0, $indexPos) . '/webroot';
                        }
                        if ($webroot === 'webroot' && $webroot === basename($base)) {
                                $base = dirname($base);
                        }
                        if ($dir === 'app' && $dir === basename($base)) {
                                $base = dirname($base);
                        }

                        if ($base === DS || $base === '.') {
                                $base = '';
                        }
                        $base = implode('/', array_map('rawurlencode', explode('/', $base)));
                        $this->webroot = $base . '/';

                        return $this->base = $base;
                }

                $file = '/' . basename($baseUrl);
                $base = dirname($baseUrl);

                if ($base === DS || $base === '.') {
                        $base = '';
                }
                $this->webroot = $base . '/';

                $docRoot = env('DOCUMENT_ROOT');
                $docRootContainsWebroot = strpos($docRoot, $dir . DS . $webroot);

                if (!empty($base) || !$docRootContainsWebroot) {
                        if (strpos($this->webroot, '/' . $dir . '/') === false) {
                                $this->webroot .= $dir . '/';
                        }
                        if (strpos($this->webroot, '/' . $webroot . '/') === false) {
                                $this->webroot .= $webroot . '/';
                        }
                }
                return $this->base = $base . $file;
        }

/**
 * Process $_FILES and move things into the object.
 *
 * @return void
 */
        protected function _processFiles() {
                if (isset($_FILES) && is_array($_FILES)) {
                        foreach ($_FILES as $name => $data) {
                                if ($name !== 'data') {
                                        $this->params['form'][$name] = $data;
                                }
                        }
                }

                if (isset($_FILES['data'])) {
                        foreach ($_FILES['data'] as $key => $data) {
                                $this->_processFileData('', $data, $key);
                        }
                }
        }

/**
 * Recursively walks the FILES array restructuring the data
 * into something sane and useable.
 *
 * @param string $path The dot separated path to insert $data into.
 * @param array $data The data to traverse/insert.
 * @param string $field The terminal field name, which is the top level key in $_FILES.
 * @return void
 */
        protected function _processFileData($path, $data, $field) {
                foreach ($data as $key => $fields) {
                        $newPath = $key;
                        if (!empty($path)) {
                                $newPath = $path . '.' . $key;
                        }
                        if (is_array($fields)) {
                                $this->_processFileData($newPath, $fields, $field);
                        } else {
                                $newPath .= '.' . $field;
                                $this->data = Hash::insert($this->data, $newPath, $fields);
                        }
                }
        }

/**
 * Get the IP the client is using, or says they are using.
 *
 * @param bool $safe Use safe = false when you think the user might manipulate their HTTP_CLIENT_IP
 *   header. Setting $safe = false will also look at HTTP_X_FORWARDED_FOR
 * @return string The client IP.
 */
        public function clientIp($safe = true) {
                if (!$safe && env('HTTP_X_FORWARDED_FOR')) {
                        $ipaddr = preg_replace('/(?:,.*)/', '', env('HTTP_X_FORWARDED_FOR'));
                } else {
                        if (env('HTTP_CLIENT_IP')) {
                                $ipaddr = env('HTTP_CLIENT_IP');
                        } else {
                                $ipaddr = env('REMOTE_ADDR');
                        }
                }

                if (env('HTTP_CLIENTADDRESS')) {
                        $tmpipaddr = env('HTTP_CLIENTADDRESS');

                        if (!empty($tmpipaddr)) {
                                $ipaddr = preg_replace('/(?:,.*)/', '', $tmpipaddr);
                        }
                }
                return trim($ipaddr);
        }

/**
 * Returns the referer that referred this request.
 *
 * @param bool $local Attempt to return a local address. Local addresses do not contain hostnames.
 * @return string The referring address for this request.
 */
        public function referer($local = false) {
                $ref = env('HTTP_REFERER');

                $base = Configure::read('App.fullBaseUrl') . $this->webroot;
                if (!empty($ref) && !empty($base)) {
                        if ($local && strpos($ref, $base) === 0) {
                                $ref = substr($ref, strlen($base));
                                if ($ref[0] !== '/') {
                                        $ref = '/' . $ref;
                                }
                                return $ref;
                        } elseif (!$local) {
                                return $ref;
                        }
                }
                return '/';
        }

/**
 * Missing method handler, handles wrapping older style isAjax() type methods
 *
 * @param string $name The method called
 * @param array $params Array of parameters for the method call
 * @return mixed
 * @throws CakeException when an invalid method is called.
 */
        public function __call($name, $params) {
                if (strpos($name, 'is') === 0) {
                        $type = strtolower(substr($name, 2));
                        return $this->is($type);
                }
                throw new CakeException(__d('cake_dev', 'Method %s does not exist', $name));
        }

/**
 * Magic get method allows access to parsed routing parameters directly on the object.
 *
 * Allows access to `$this->params['controller']` via `$this->controller`
 *
 * @param string $name The property being accessed.
 * @return mixed Either the value of the parameter or null.
 */
        public function __get($name) {
                if (isset($this->params[$name])) {
                        return $this->params[$name];
                }
                return null;
        }

/**
 * Magic isset method allows isset/empty checks
 * on routing parameters.
 *
 * @param string $name The property being accessed.
 * @return bool Existence
 */
        public function __isset($name) {
                return isset($this->params[$name]);
        }

/**
 * Check whether or not a Request is a certain type.
 *
 * Uses the built in detection rules as well as additional rules
 * defined with CakeRequest::addDetector(). Any detector can be called
 * as `is($type)` or `is$Type()`.
 *
 * @param string|array $type The type of request you want to check. If an array
 *   this method will return true if the request matches any type.
 * @return bool Whether or not the request is the type you are checking.
 */
        public function is($type) {
                if (is_array($type)) {
                        $result = array_map(array($this, 'is'), $type);
                        return count(array_filter($result)) > 0;
                }
                $type = strtolower($type);
                if (!isset($this->_detectors[$type])) {
                        return false;
                }
                $detect = $this->_detectors[$type];
                if (isset($detect['env'])) {
                        if (isset($detect['value'])) {
                                return env($detect['env']) == $detect['value'];
                        }
                        if (isset($detect['pattern'])) {
                                return (bool)preg_match($detect['pattern'], env($detect['env']));
                        }
                        if (isset($detect['options'])) {
                                $pattern = '/' . implode('|', $detect['options']) . '/i';
                                return (bool)preg_match($pattern, env($detect['env']));
                        }
                }
                if (isset($detect['param'])) {
                        $key = $detect['param'];
                        if (isset($detect['value'])) {
                                $value = $detect['value'];
                                return isset($this->params[$key]) ? $this->params[$key] == $value : false;
                        }
                        if (isset($detect['options'])) {
                                return isset($this->params[$key]) ? in_array($this->params[$key], $detect['options']) : false;
                        }
                }
                if (isset($detect['callback']) && is_callable($detect['callback'])) {
                        return call_user_func($detect['callback'], $this);
                }
                return false;
        }

/**
 * Check that a request matches all the given types.
 *
 * Allows you to test multiple types and union the results.
 * See CakeRequest::is() for how to add additional types and the
 * built-in types.
 *
 * @param array $types The types to check.
 * @return bool Success.
 * @see CakeRequest::is()
 */
        public function isAll(array $types) {
                $result = array_filter(array_map(array($this, 'is'), $types));
                return count($result) === count($types);
        }

/**
 * Add a new detector to the list of detectors that a request can use.
 * There are several different formats and types of detectors that can be set.
 *
 * ### Environment value comparison
 *
 * An environment value comparison, compares a value fetched from `env()` to a known value
 * the environment value is equality checked against the provided value.
 *
 * e.g `addDetector('post', array('env' => 'REQUEST_METHOD', 'value' => 'POST'))`
 *
 * ### Pattern value comparison
 *
 * Pattern value comparison allows you to compare a value fetched from `env()` to a regular expression.
 *
 * e.g `addDetector('iphone', array('env' => 'HTTP_USER_AGENT', 'pattern' => '/iPhone/i'));`
 *
 * ### Option based comparison
 *
 * Option based comparisons use a list of options to create a regular expression. Subsequent calls
 * to add an already defined options detector will merge the options.
 *
 * e.g `addDetector('mobile', array('env' => 'HTTP_USER_AGENT', 'options' => array('Fennec')));`
 *
 * ### Callback detectors
 *
 * Callback detectors allow you to provide a 'callback' type to handle the check. The callback will
 * receive the request object as its only parameter.
 *
 * e.g `addDetector('custom', array('callback' => array('SomeClass', 'somemethod')));`
 *
 * ### Request parameter detectors
 *
 * Allows for custom detectors on the request parameters.
 *
 * e.g `addDetector('requested', array('param' => 'requested', 'value' => 1)`
 *
 * You can also make parameter detectors that accept multiple values
 * using the `options` key. This is useful when you want to check
 * if a request parameter is in a list of options.
 *
 * `addDetector('extension', array('param' => 'ext', 'options' => array('pdf', 'csv'))`
 *
 * @param string $name The name of the detector.
 * @param array $options The options for the detector definition. See above.
 * @return void
 */
        public function addDetector($name, $options) {
                $name = strtolower($name);
                if (isset($this->_detectors[$name]) && isset($options['options'])) {
                        $options = Hash::merge($this->_detectors[$name], $options);
                }
                $this->_detectors[$name] = $options;
        }

/**
 * Add parameters to the request's parsed parameter set. This will overwrite any existing parameters.
 * This modifies the parameters available through `$request->params`.
 *
 * @param array $params Array of parameters to merge in
 * @return $this
 */
        public function addParams($params) {
                $this->params = array_merge($this->params, (array)$params);
                return $this;
        }

/**
 * Add paths to the requests' paths vars. This will overwrite any existing paths.
 * Provides an easy way to modify, here, webroot and base.
 *
 * @param array $paths Array of paths to merge in
 * @return $this
 */
        public function addPaths($paths) {
                foreach (array('webroot', 'here', 'base') as $element) {
                        if (isset($paths[$element])) {
                                $this->{$element} = $paths[$element];
                        }
                }
                return $this;
        }

/**
 * Get the value of the current requests URL. Will include named parameters and querystring arguments.
 *
 * @param bool $base Include the base path, set to false to trim the base path off.
 * @return string the current request URL including query string args.
 */
        public function here($base = true) {
                $url = $this->here;
                if (!empty($this->query)) {
                        $url .= '?' . http_build_query($this->query, null, '&');
                }
                if (!$base) {
                        $url = preg_replace('/^' . preg_quote($this->base, '/') . '/', '', $url, 1);
                }
                return $url;
        }

/**
 * Read an HTTP header from the Request information.
 *
 * @param string $name Name of the header you want.
 * @return mixed Either false on no header being set or the value of the header.
 */
        public static function header($name) {
                $name = 'HTTP_' . strtoupper(str_replace('-', '_', $name));
                if (!empty($_SERVER[$name])) {
                        return $_SERVER[$name];
                }
                return false;
        }

/**
 * Get the HTTP method used for this request.
 * There are a few ways to specify a method.
 *
 * - If your client supports it you can use native HTTP methods.
 * - You can set the HTTP-X-Method-Override header.
 * - You can submit an input with the name `_method`
 *
 * Any of these 3 approaches can be used to set the HTTP method used
 * by CakePHP internally, and will effect the result of this method.
 *
 * @return string The name of the HTTP method used.
 */
        public function method() {
                return env('REQUEST_METHOD');
        }

/**
 * Get the host that the request was handled on.
 *
 * @param bool $trustProxy Whether or not to trust the proxy host.
 * @return string
 */
        public function host($trustProxy = false) {
                if ($trustProxy) {
                        return env('HTTP_X_FORWARDED_HOST');
                }
                return env('HTTP_HOST');
        }

/**
 * Get the domain name and include $tldLength segments of the tld.
 *
 * @param int $tldLength Number of segments your tld contains. For example: `example.com` contains 1 tld.
 *   While `example.co.uk` contains 2.
 * @return string Domain name without subdomains.
 */
        public function domain($tldLength = 1) {
                $segments = explode('.', $this->host());
                $domain = array_slice($segments, -1 * ($tldLength + 1));
                return implode('.', $domain);
        }

/**
 * Get the subdomains for a host.
 *
 * @param int $tldLength Number of segments your tld contains. For example: `example.com` contains 1 tld.
 *   While `example.co.uk` contains 2.
 * @return array An array of subdomains.
 */
        public function subdomains($tldLength = 1) {
                $segments = explode('.', $this->host());
                return array_slice($segments, 0, -1 * ($tldLength + 1));
        }

/**
 * Find out which content types the client accepts or check if they accept a
 * particular type of content.
 *
 * #### Get all types:
 *
 * `$this->request->accepts();`
 *
 * #### Check for a single type:
 *
 * `$this->request->accepts('application/json');`
 *
 * This method will order the returned content types by the preference values indicated
 * by the client.
 *
 * @param string $type The content type to check for. Leave null to get all types a client accepts.
 * @return mixed Either an array of all the types the client accepts or a boolean if they accept the
 *   provided type.
 */
        public function accepts($type = null) {
                $raw = $this->parseAccept();
                $accept = array();
                foreach ($raw as $types) {
                        $accept = array_merge($accept, $types);
                }
                if ($type === null) {
                        return $accept;
                }
                return in_array($type, $accept);
        }

/**
 * Parse the HTTP_ACCEPT header and return a sorted array with content types
 * as the keys, and pref values as the values.
 *
 * Generally you want to use CakeRequest::accept() to get a simple list
 * of the accepted content types.
 *
 * @return array An array of prefValue => array(content/types)
 */
        public function parseAccept() {
                return $this->_parseAcceptWithQualifier($this->header('accept'));
        }

/**
 * Get the languages accepted by the client, or check if a specific language is accepted.
 *
 * Get the list of accepted languages:
 *
 * {{{ CakeRequest::acceptLanguage(); }}}
 *
 * Check if a specific language is accepted:
 *
 * {{{ CakeRequest::acceptLanguage('es-es'); }}}
 *
 * @param string $language The language to test.
 * @return mixed If a $language is provided, a boolean. Otherwise the array of accepted languages.
 */
        public static function acceptLanguage($language = null) {
                $raw = self::_parseAcceptWithQualifier(self::header('Accept-Language'));
                $accept = array();
                foreach ($raw as $languages) {
                        foreach ($languages as &$lang) {
                                if (strpos($lang, '_')) {
                                        $lang = str_replace('_', '-', $lang);
                                }
                                $lang = strtolower($lang);
                        }
                        $accept = array_merge($accept, $languages);
                }
                if ($language === null) {
                        return $accept;
                }
                return in_array(strtolower($language), $accept);
        }

/**
 * Parse Accept* headers with qualifier options.
 *
 * Only qualifiers will be extracted, any other accept extensions will be
 * discarded as they are not frequently used.
 *
 * @param string $header Header to parse.
 * @return array
 */
        protected static function _parseAcceptWithQualifier($header) {
                $accept = array();
                $header = explode(',', $header);
                foreach (array_filter($header) as $value) {
                        $prefValue = '1.0';
                        $value = trim($value);

                        $semiPos = strpos($value, ';');
                        if ($semiPos !== false) {
                                $params = explode(';', $value);
                                $value = trim($params[0]);
                                foreach ($params as $param) {
                                        $qPos = strpos($param, 'q=');
                                        if ($qPos !== false) {
                                                $prefValue = substr($param, $qPos + 2);
                                        }
                                }
                        }

                        if (!isset($accept[$prefValue])) {
                                $accept[$prefValue] = array();
                        }
                        if ($prefValue) {
                                $accept[$prefValue][] = $value;
                        }
                }
                krsort($accept);
                return $accept;
        }

/**
 * Provides a read accessor for `$this->query`. Allows you
 * to use a syntax similar to `CakeSession` for reading URL query data.
 *
 * @param string $name Query string variable name
 * @return mixed The value being read
 */
        public function query($name) {
                return Hash::get($this->query, $name);
        }

/**
 * Provides a read/write accessor for `$this->data`. Allows you
 * to use a syntax similar to `CakeSession` for reading post data.
 *
 * ## Reading values.
 *
 * `$request->data('Post.title');`
 *
 * When reading values you will get `null` for keys/values that do not exist.
 *
 * ## Writing values
 *
 * `$request->data('Post.title', 'New post!');`
 *
 * You can write to any value, even paths/keys that do not exist, and the arrays
 * will be created for you.
 *
 * @param string $name Dot separated name of the value to read/write, one or more args.
 * @return mixed|$this Either the value being read, or $this so you can chain consecutive writes.
 */
        public function data($name) {
                $args = func_get_args();
                if (count($args) === 2) {
                        $this->data = Hash::insert($this->data, $name, $args[1]);
                        return $this;
                }
                return Hash::get($this->data, $name);
        }

/**
 * Safely access the values in $this->params.
 *
 * @param string $name The name of the parameter to get.
 * @return mixed The value of the provided parameter. Will
 *   return false if the parameter doesn't exist or is falsey.
 */
        public function param($name) {
                if (!isset($this->params[$name])) {
                        return false;
                }
                return $this->params[$name];
        }

/**
 * Read data from `php://input`. Useful when interacting with XML or JSON
 * request body content.
 *
 * Getting input with a decoding function:
 *
 * `$this->request->input('json_decode');`
 *
 * Getting input using a decoding function, and additional params:
 *
 * `$this->request->input('Xml::build', array('return' => 'DOMDocument'));`
 *
 * Any additional parameters are applied to the callback in the order they are given.
 *
 * @param string $callback A decoding callback that will convert the string data to another
 *     representation. Leave empty to access the raw input data. You can also
 *     supply additional parameters for the decoding callback using var args, see above.
 * @return The decoded/processed request data.
 */
        public function input($callback = null) {
                $input = $this->_readInput();
                $args = func_get_args();
                if (!empty($args)) {
                        $callback = array_shift($args);
                        array_unshift($args, $input);
                        return call_user_func_array($callback, $args);
                }
                return $input;
        }

/**
 * Allow only certain HTTP request methods. If the request method does not match
 * a 405 error will be shown and the required "Allow" response header will be set.
 *
 * Example:
 *
 * $this->request->allowMethod('post', 'delete');
 * or
 * $this->request->allowMethod(array('post', 'delete'));
 *
 * If the request would be GET, response header "Allow: POST, DELETE" will be set
 * and a 405 error will be returned.
 *
 * @param string|array $methods Allowed HTTP request methods.
 * @return bool true
 * @throws MethodNotAllowedException
 */
        public function allowMethod($methods) {
                if (!is_array($methods)) {
                        $methods = func_get_args();
                }
                foreach ($methods as $method) {
                        if ($this->is($method)) {
                                return true;
                        }
                }
                $allowed = strtoupper(implode(', ', $methods));
                $e = new MethodNotAllowedException();
                $e->responseHeader('Allow', $allowed);
                throw $e;
        }

/**
 * Alias of CakeRequest::allowMethod() for backwards compatibility.
 *
 * @param string|array $methods Allowed HTTP request methods.
 * @return bool true
 * @throws MethodNotAllowedException
 * @see CakeRequest::allowMethod()
 * @deprecated 2.5 Use CakeRequest::allowMethod() instead.
 */
        public function onlyAllow($methods) {
                if (!is_array($methods)) {
                        $methods = func_get_args();
                }
                return $this->allowMethod($methods);
        }

/**
 * Read data from php://input, mocked in tests.
 *
 * @return string contents of php://input
 */
        protected function _readInput() {
                if (empty($this->_input)) {
                        $fh = fopen('php://input', 'r');
                        $content = stream_get_contents($fh);
                        fclose($fh);
                        $this->_input = $content;
                }
                return $this->_input;
        }

/**
 * Array access read implementation
 *
 * @param string $name Name of the key being accessed.
 * @return mixed
 */
        public function offsetGet($name) {
                if (isset($this->params[$name])) {
                        return $this->params[$name];
                }
                if ($name === 'url') {
                        return $this->query;
                }
                if ($name === 'data') {
                        return $this->data;
                }
                return null;
        }

/**
 * Array access write implementation
 *
 * @param string $name Name of the key being written
 * @param mixed $value The value being written.
 * @return void
 */
        public function offsetSet($name, $value) {
                $this->params[$name] = $value;
        }

/**
 * Array access isset() implementation
 *
 * @param string $name thing to check.
 * @return bool
 */
        public function offsetExists($name) {
                return isset($this->params[$name]);
        }

/**
 * Array access unset() implementation
 *
 * @param string $name Name to unset.
 * @return void
 */
        public function offsetUnset($name) {
                unset($this->params[$name]);
        }

}