<?php

/**
 * @package KantPHP
 * @author  Zhenqiang Zhang <zhenqiang.zhang@hotmail.com>
 * @copyright (c) KantPHP Studio, All rights reserved.
 * @license http://www.opensource.org/licenses/BSD-3-Clause  The BSD 3-Clause License
 */

namespace Kant\Http;

use Kant\Foundation\Arrayable;
use ArrayAccess;
use Closure;
use Kant\Support\Str;
use Kant\Support\Arr;
use Kant\Session\Session;
use Kant\Http\File\UploadedFile;
use RuntimeException;

class BaseRequest implements Arrayable, ArrayAccess
{

	const HEADER_FORWARDED = 'forwarded';
	const HEADER_CLIENT_IP = 'client_ip';
	const HEADER_CLIENT_HOST = 'client_host';
	const HEADER_CLIENT_PROTO = 'client_proto';
	const HEADER_CLIENT_PORT = 'client_port';
	const METHOD_HEAD = 'HEAD';
	const METHOD_GET = 'GET';
	const METHOD_POST = 'POST';
	const METHOD_PUT = 'PUT';
	const METHOD_PATCH = 'PATCH';
	const METHOD_DELETE = 'DELETE';
	const METHOD_PURGE = 'PURGE';
	const METHOD_OPTIONS = 'OPTIONS';
	const METHOD_TRACE = 'TRACE';
	const METHOD_CONNECT = 'CONNECT';

	protected static $instance;

	/**
	 *
	 * @var string[]
	 */
	protected static $trustedProxies = array();

	/**
	 *
	 * @var string[]
	 */
	protected static $trustedHostPatterns = array();

	/**
	 *
	 * @var string[]
	 */
	protected static $trustedHosts = array();

	/**
	 * The decoded JSON content for the request.
	 *
	 * @var string
	 */
	protected $json;

	/**
	 * All of the converted files for the request.
	 *
	 * @var array
	 */
	protected $convertedFiles;

	/**
	 * The user resolver callback.
	 *
	 * @var \Closure
	 */
	protected $userResolver;

	/**
	 * The route resolver callback.
	 *
	 * @var \Closure
	 */
	protected $routeResolver;

	/**
	 * Names for headers that can be trusted when
	 * using trusted proxies.
	 *
	 * The FORWARDED header is the standard as of rfc7239.
	 *
	 * The other headers are non-standard, but widely used
	 * by popular reverse proxies (like Apache mod_proxy or Amazon EC2).
	 */
	protected static $trustedHeaders = array(
		self::HEADER_FORWARDED => 'FORWARDED',
		self::HEADER_CLIENT_IP => 'X_FORWARDED_FOR',
		self::HEADER_CLIENT_HOST => 'X_FORWARDED_HOST',
		self::HEADER_CLIENT_PROTO => 'X_FORWARDED_PROTO',
		self::HEADER_CLIENT_PORT => 'X_FORWARDED_PORT'
	);
	protected static $httpMethodParameterOverride = false;

	/**
	 * Custom parameters.
	 *
	 * @var \Kant\Http\ParameterBag
	 */
	public $attributes;

	/**
	 * Request body parameters ($_POST).
	 *
	 * @var \Kant\Http\ParameterBag
	 */
	public $request;

	/**
	 * Query string parameters ($_GET).
	 *
	 * @var \Kant\Http\ParameterBag
	 */
	public $query;

	/**
	 * Server and execution environment parameters ($_SERVER).
	 *
	 * @var \Kant\Http\ServerBag
	 */
	public $server;

	/**
	 * Uploaded files ($_FILES).
	 *
	 * @var \Kant\Http\FileBag
	 */
	public $files;

	/**
	 * Cookies ($_COOKIE).
	 *
	 * @var \Kant\Http\ParameterBag
	 */
	public $cookies;

	/**
	 * Headers (taken from the $_SERVER).
	 *
	 * @var \Kant\Http\HeaderBag
	 */
	public $headers;

	/**
	 *
	 * @var string
	 */
	protected $content;

	/**
	 *
	 * @var array
	 */
	protected $languages;

	/**
	 *
	 * @var array
	 */
	protected $charsets;

	/**
	 *
	 * @var array
	 */
	protected $encodings;

	/**
	 *
	 * @var array
	 */
	protected $acceptableContentTypes;

	/**
	 *
	 * @var string
	 */
	protected $pathInfo;

	/**
	 *
	 * @var string
	 */
	protected $requestUri;

	/**
	 *
	 * @var string
	 */
	protected $baseUrl;

	/**
	 *
	 * @var string
	 */
	protected $basePath;

	/**
	 *
	 * @var string
	 */
	protected $method;

	/**
	 *
	 * @var string
	 */
	protected $format;

	/**
	 *
	 * @var \Kant\Http\Session\SessionInterface
	 */
	protected $session;

	/**
	 *
	 * @var string
	 */
	protected $locale;

	/**
	 *
	 * @var string
	 */
	protected $defaultLocale = 'en';

	/**
	 *
	 * @var array
	 */
	protected static $formats;
	protected static $requestFactory;

	/**
	 * Constructor.
	 *
	 * @param array $query
	 *            The GET parameters
	 * @param array $request
	 *            The POST parameters
	 * @param array $attributes
	 *            The request attributes (parameters parsed from the PATH_INFO, ...)
	 * @param array $cookies
	 *            The COOKIE parameters
	 * @param array $files
	 *            The FILES parameters
	 * @param array $server
	 *            The SERVER parameters
	 * @param string|resource $content
	 *            The raw body data
	 */
	public function __construct(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null)
	{
		$this->initialize($query, $request, $attributes, $cookies, $files, $server, $content);
	}

	/**
	 * Sets the parameters for this request.
	 *
	 * This method also re-initializes all properties.
	 *
	 * @param array $query
	 *            The GET parameters
	 * @param array $request
	 *            The POST parameters
	 * @param array $attributes
	 *            The request attributes (parameters parsed from the PATH_INFO, ...)
	 * @param array $cookies
	 *            The COOKIE parameters
	 * @param array $files
	 *            The FILES parameters
	 * @param array $server
	 *            The SERVER parameters
	 * @param string|resource $content
	 *            The raw body data
	 */
	public function initialize(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null)
	{
		$this->request = new ParameterBag($request);
		$this->query = new ParameterBag($query);
		$this->attributes = new ParameterBag($attributes);
		$this->cookies = new ParameterBag($cookies);
		$this->files = new FileBag($files);
		$this->server = new ServerBag($server);
		$this->headers = new HeaderBag($this->server->getHeaders());

		$this->content = $content;
		$this->languages = null;
		$this->charsets = null;
		$this->encodings = null;
		$this->acceptableContentTypes = null;
		$this->pathInfo = null;
		$this->requestUri = null;
		$this->baseUrl = null;
		$this->basePath = null;
		$this->method = null;
		$this->format = null;
	}

	/**
	 * Creates a new request with values from PHP's super globals.
	 *
	 * @return Request A new request
	 */
	public static function createFromGlobals()
	{
		// With the php's bug #66606, the php's built-in web server
		// stores the Content-Type and Content-Length header values in
		// HTTP_CONTENT_TYPE and HTTP_CONTENT_LENGTH fields.
		$server = $_SERVER;
		if ('cli-server' === PHP_SAPI) {
			if (array_key_exists('HTTP_CONTENT_LENGTH', $_SERVER)) {
				$server['CONTENT_LENGTH'] = $_SERVER['HTTP_CONTENT_LENGTH'];
			}
			if (array_key_exists('HTTP_CONTENT_TYPE', $_SERVER)) {
				$server['CONTENT_TYPE'] = $_SERVER['HTTP_CONTENT_TYPE'];
			}
		}

		$request = self::createRequestFromFactory($_GET, $_POST, array(), $_COOKIE, $_FILES, $server);

		if (0 === strpos($request->headers->get('CONTENT_TYPE'), 'application/x-www-form-urlencoded') && in_array(strtoupper($request->server->get('REQUEST_METHOD', 'GET')), array(
					'PUT',
					'DELETE',
					'PATCH'
				))) {
			parse_str($request->getContent(), $data);
			$request->request = new ParameterBag($data);
		}

		return $request;
	}

	/**
	 * Creates a Request based on a given URI and configuration.
	 *
	 * The information contained in the URI always take precedence
	 * over the other information (server and parameters).
	 *
	 * @param string $uri
	 *            The URI
	 * @param string $method
	 *            The HTTP method
	 * @param array $parameters
	 *            The query (GET) or request (POST) parameters
	 * @param array $cookies
	 *            The request cookies ($_COOKIE)
	 * @param array $files
	 *            The request files ($_FILES)
	 * @param array $server
	 *            The server parameters ($_SERVER)
	 * @param string $content
	 *            The raw body data
	 *            
	 * @return Request A Request instance
	 */
	public static function create($uri, $method = 'GET', $parameters = array(), $cookies = array(), $files = array(), $server = array(), $content = null)
	{
		$server = array_replace(array(
			'SERVER_NAME' => 'localhost',
			'SERVER_PORT' => 80,
			'HTTP_HOST' => 'localhost',
			'HTTP_USER_AGENT' => '',
			'HTTP_ACCEPT' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
			'HTTP_ACCEPT_LANGUAGE' => 'en-us,en;q=0.5',
			'HTTP_ACCEPT_CHARSET' => 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
			'REMOTE_ADDR' => '127.0.0.1',
			'SCRIPT_NAME' => '',
			'SCRIPT_FILENAME' => '',
			'SERVER_PROTOCOL' => 'HTTP/1.1',
			'REQUEST_TIME' => time()
				), $server);

		$server['PATH_INFO'] = '';
		$server['REQUEST_METHOD'] = strtoupper($method);

		$components = parse_url($uri);
		if (isset($components['host'])) {
			$server['SERVER_NAME'] = $components['host'];
			$server['HTTP_HOST'] = $components['host'];
		}

		if (isset($components['scheme'])) {
			if ('https' === $components['scheme']) {
				$server['HTTPS'] = 'on';
				$server['SERVER_PORT'] = 443;
			} else {
				unset($server['HTTPS']);
				$server['SERVER_PORT'] = 80;
			}
		}

		if (isset($components['port'])) {
			$server['SERVER_PORT'] = $components['port'];
			$server['HTTP_HOST'] = $server['HTTP_HOST'] . ':' . $components['port'];
		}

		if (isset($components['user'])) {
			$server['PHP_AUTH_USER'] = $components['user'];
		}

		if (isset($components['pass'])) {
			$server['PHP_AUTH_PW'] = $components['pass'];
		}

		if (!isset($components['path'])) {
			$components['path'] = '/';
		}

		switch (strtoupper($method)) {
			case 'POST':
			case 'PUT':
			case 'DELETE':
				if (!isset($server['CONTENT_TYPE'])) {
					$server['CONTENT_TYPE'] = 'application/x-www-form-urlencoded';
				}
			// no break
			case 'PATCH':
				$request = $parameters;
				$query = array();
				break;
			default:
				$request = array();
				$query = $parameters;
				break;
		}

		$queryString = '';
		if (isset($components['query'])) {
			parse_str(html_entity_decode($components['query']), $qs);

			if ($query) {
				$query = array_replace($qs, $query);
				$queryString = http_build_query($query, '', '&');
			} else {
				$query = $qs;
				$queryString = $components['query'];
			}
		} elseif ($query) {
			$queryString = http_build_query($query, '', '&');
		}

		$server['REQUEST_URI'] = $components['path'] . ('' !== $queryString ? '?' . $queryString : '');
		$server['QUERY_STRING'] = $queryString;

		return self::createRequestFromFactory($query, $request, array(), $cookies, $files, $server, $content);
	}

	/**
	 * Sets a callable able to create a Request instance.
	 *
	 * This is mainly useful when you need to override the Request class
	 * to keep BC with an existing system. It should not be used for any
	 * other purpose.
	 *
	 * @param callable|null $callable
	 *            A PHP callable
	 */
	public static function setFactory($callable)
	{
		self::$requestFactory = $callable;
	}

	/**
	 * Clones a request and overrides some of its parameters.
	 *
	 * @param array $query
	 *            The GET parameters
	 * @param array $request
	 *            The POST parameters
	 * @param array $attributes
	 *            The request attributes (parameters parsed from the PATH_INFO, ...)
	 * @param array $cookies
	 *            The COOKIE parameters
	 * @param array $files
	 *            The FILES parameters
	 * @param array $server
	 *            The SERVER parameters
	 *            
	 * @return Request The duplicated request
	 */
	public function duplicate(array $query = null, array $request = null, array $attributes = null, array $cookies = null, array $files = null, array $server = null)
	{
		$dup = clone $this;
		if ($query !== null) {
			$dup->query = new ParameterBag($query);
		}
		if ($request !== null) {
			$dup->request = new ParameterBag($request);
		}
		if ($attributes !== null) {
			$dup->attributes = new ParameterBag($attributes);
		}
		if ($cookies !== null) {
			$dup->cookies = new ParameterBag($cookies);
		}
		if ($files !== null) {
			$dup->files = new FileBag($files);
		}
		if ($server !== null) {
			$dup->server = new ServerBag($server);
			$dup->headers = new HeaderBag($dup->server->getHeaders());
		}
		$dup->languages = null;
		$dup->charsets = null;
		$dup->encodings = null;
		$dup->acceptableContentTypes = null;
		$dup->pathInfo = null;
		$dup->requestUri = null;
		$dup->baseUrl = null;
		$dup->basePath = null;
		$dup->method = null;
		$dup->format = null;

		if (!$dup->get('_format') && $this->get('_format')) {
			$dup->attributes->set('_format', $this->get('_format'));
		}

		if (!$dup->getRequestFormat(null)) {
			$dup->setRequestFormat($this->getRequestFormat(null));
		}

		return $dup;
	}

	/**
	 * Clones the current request.
	 *
	 * Note that the session is not cloned as duplicated requests
	 * are most of the time sub-requests of the main one.
	 */
	public function __clone()
	{
		$this->query = clone $this->query;
		$this->request = clone $this->request;
		$this->attributes = clone $this->attributes;
		$this->cookies = clone $this->cookies;
		$this->files = clone $this->files;
		$this->server = clone $this->server;
		$this->headers = clone $this->headers;
	}

	/**
	 * Returns the request as a string.
	 *
	 * @return string The request
	 */
	public function __toString()
	{
		try {
			$content = $this->getContent();
		} catch (\LogicException $e) {
			return trigger_error($e, E_USER_ERROR);
		}

		return sprintf('%s %s %s', $this->getMethod(), $this->getRequestUri(), $this->server->get('SERVER_PROTOCOL')) . "\r\n" . $this->headers . "\r\n" . $content;
	}

	/**
	 * Overrides the PHP global variables according to this request instance.
	 *
	 * It overrides $_GET, $_POST, $_REQUEST, $_SERVER, $_COOKIE.
	 * $_FILES is never overridden, see rfc1867
	 */
	public function overrideGlobals()
	{
		$this->server->set('QUERY_STRING', static::normalizeQueryString(http_build_query($this->query->all(), null, '&')));

		$_GET = $this->query->all();
		$_POST = $this->request->all();
		$_SERVER = $this->server->all();
		$_COOKIE = $this->cookies->all();

		foreach ($this->headers->all() as $key => $value) {
			$key = strtoupper(str_replace('-', '_', $key));
			if (in_array($key, array(
						'CONTENT_TYPE',
						'CONTENT_LENGTH'
					))) {
				$_SERVER[$key] = implode(', ', $value);
			} else {
				$_SERVER['HTTP_' . $key] = implode(', ', $value);
			}
		}

		$request = array(
			'g' => $_GET,
			'p' => $_POST,
			'c' => $_COOKIE
		);

		$requestOrder = ini_get('request_order') ?: ini_get('variables_order');
		$requestOrder = preg_replace('#[^cgp]#', '', strtolower($requestOrder)) ?: 'gp';

		$_REQUEST = array();
		foreach (str_split($requestOrder) as $order) {
			$_REQUEST = array_merge($_REQUEST, $request[$order]);
		}
	}

	/**
	 * Sets a list of trusted proxies.
	 *
	 * You should only list the reverse proxies that you manage directly.
	 *
	 * @param array $proxies
	 *            A list of trusted proxies
	 */
	public static function setTrustedProxies(array $proxies)
	{
		self::$trustedProxies = $proxies;
	}

	/**
	 * Gets the list of trusted proxies.
	 *
	 * @return array An array of trusted proxies.
	 */
	public static function getTrustedProxies()
	{
		return self::$trustedProxies;
	}

	/**
	 * Sets a list of trusted host patterns.
	 *
	 * You should only list the hosts you manage using regexs.
	 *
	 * @param array $hostPatterns
	 *            A list of trusted host patterns
	 */
	public static function setTrustedHosts(array $hostPatterns)
	{
		self::$trustedHostPatterns = array_map(function ($hostPattern) {
			return sprintf('#%s#i', $hostPattern);
		}, $hostPatterns);
		// we need to reset trusted hosts on trusted host patterns change
		self::$trustedHosts = array();
	}

	/**
	 * Gets the list of trusted host patterns.
	 *
	 * @return array An array of trusted host patterns.
	 */
	public static function getTrustedHosts()
	{
		return self::$trustedHostPatterns;
	}

	/**
	 * Sets the name for trusted headers.
	 *
	 * The following header keys are supported:
	 *
	 * * Request::HEADER_CLIENT_IP: defaults to X-Forwarded-For (see getClientIp())
	 * * Request::HEADER_CLIENT_HOST: defaults to X-Forwarded-Host (see getHost())
	 * * Request::HEADER_CLIENT_PORT: defaults to X-Forwarded-Port (see getPort())
	 * * Request::HEADER_CLIENT_PROTO: defaults to X-Forwarded-Proto (see getScheme() and isSecure())
	 *
	 * Setting an empty value allows to disable the trusted header for the given key.
	 *
	 * @param string $key
	 *            The header key
	 * @param string $value
	 *            The header name
	 *            
	 * @throws \InvalidArgumentException
	 */
	public static function setTrustedHeaderName($key, $value)
	{
		if (!array_key_exists($key, self::$trustedHeaders)) {
			throw new \InvalidArgumentException(sprintf('Unable to set the trusted header name for key "%s".', $key));
		}

		self::$trustedHeaders[$key] = $value;
	}

	/**
	 * Gets the trusted proxy header name.
	 *
	 * @param string $key
	 *            The header key
	 *            
	 * @return string The header name
	 *        
	 * @throws \InvalidArgumentException
	 */
	public static function getTrustedHeaderName($key)
	{
		if (!array_key_exists($key, self::$trustedHeaders)) {
			throw new \InvalidArgumentException(sprintf('Unable to get the trusted header name for key "%s".', $key));
		}

		return self::$trustedHeaders[$key];
	}

	/**
	 * Normalizes a query string.
	 *
	 * It builds a normalized query string, where keys/value pairs are alphabetized,
	 * have consistent escaping and unneeded delimiters are removed.
	 *
	 * @param string $qs
	 *            Query string
	 *            
	 * @return string A normalized query string for the Request
	 */
	public static function normalizeQueryString($qs)
	{
		if ('' == $qs) {
			return '';
		}

		$parts = array();
		$order = array();

		foreach (explode('&', $qs) as $param) {
			if ('' === $param || '=' === $param[0]) {
				// Ignore useless delimiters, e.g. "x=y&".
				// Also ignore pairs with empty key, even if there was a value, e.g. "=value", as such nameless values cannot be retrieved anyway.
				// PHP also does not include them when building _GET.
				continue;
			}

			$keyValuePair = explode('=', $param, 2);

			// GET parameters, that are submitted from a HTML form, encode spaces as "+" by default (as defined in enctype application/x-www-form-urlencoded).
			// PHP also converts "+" to spaces when filling the global _GET or when using the function parse_str. This is why we use urldecode and then normalize to
			// RFC 3986 with rawurlencode.
			$parts[] = isset($keyValuePair[1]) ? rawurlencode(urldecode($keyValuePair[0])) . '=' . rawurlencode(urldecode($keyValuePair[1])) : rawurlencode(urldecode($keyValuePair[0]));
			$order[] = urldecode($keyValuePair[0]);
		}

		array_multisort($order, SORT_ASC, $parts);

		return implode('&', $parts);
	}

	/**
	 * Enables support for the _method request parameter to determine the intended HTTP method.
	 *
	 * Be warned that enabling this feature might lead to CSRF issues in your code.
	 * Check that you are using CSRF tokens when required.
	 * If the HTTP method parameter override is enabled, an html-form with method "POST" can be altered
	 * and used to send a "PUT" or "DELETE" request via the _method request parameter.
	 * If these methods are not protected against CSRF, this presents a possible vulnerability.
	 *
	 * The HTTP method can only be overridden when the real HTTP method is POST.
	 */
	public static function enableHttpMethodParameterOverride()
	{
		self::$httpMethodParameterOverride = true;
	}

	/**
	 * Checks whether support for the _method request parameter is enabled.
	 *
	 * @return bool True when the _method request parameter is enabled, false otherwise
	 */
	public static function getHttpMethodParameterOverride()
	{
		return self::$httpMethodParameterOverride;
	}

	/**
	 * Gets a "parameter" value from any bag.
	 *
	 * This method is mainly useful for libraries that want to provide some flexibility. If you don't need the
	 * flexibility in controllers, it is better to explicitly get request parameters from the appropriate
	 * public property instead (attributes, query, request).
	 *
	 * Order of precedence: PATH (routing placeholders or custom attributes), GET, BODY
	 *
	 * @param string $key
	 *            the key
	 * @param mixed $default
	 *            the default value
	 *            
	 * @return mixed
	 */
	public function get($key, $default = null)
	{
		if ($this !== $result = $this->attributes->get($key, $this)) {
			return $result;
		}

		if ($this !== $result = $this->query->get($key, $this)) {
			return $result;
		}

		if ($this !== $result = $this->request->get($key, $this)) {
			return $result;
		}

		return $default;
	}

	/**
	 * Gets the Session.
	 *
	 * @return SessionInterface|null The session
	 */
	public function getSession()
	{
		return $this->session;
	}

	/**
	 * Whether the request contains a Session which was started in one of the
	 * previous requests.
	 *
	 * @return bool
	 */
	public function hasPreviousSession()
	{
		// the check for $this->session avoids malicious users trying to fake a session cookie with proper name
		return $this->hasSession() && $this->cookies->has($this->session->getName());
	}

	/**
	 * Whether the request contains a Session object.
	 *
	 * This method does not give any information about the state of the session object,
	 * like whether the session is started or not. It is just a way to check if this Request
	 * is associated with a Session instance.
	 *
	 * @return bool true when the Request contains a Session object, false otherwise
	 */
	public function hasSession()
	{
		return null !== $this->session;
	}

	/**
	 * Sets the Session.
	 *
	 * @param SessionInterface $session
	 *            The Session
	 */
	public function setSession(Session $session)
	{
		$this->session = $session;
	}

	/**
	 * Returns the client IP addresses.
	 *
	 * In the returned array the most trusted IP address is first, and the
	 * least trusted one last. The "real" client IP address is the last one,
	 * but this is also the least trusted one. Trusted proxies are stripped.
	 *
	 * Use this method carefully; you should use getClientIp() instead.
	 *
	 * @return array The client IP addresses
	 *        
	 * @see getClientIp()
	 */
	public function getClientIps()
	{
		$clientIps = array();
		$ip = $this->server->get('REMOTE_ADDR');

		if (!$this->isFromTrustedProxy()) {
			return array(
				$ip
			);
		}

		if (self::$trustedHeaders[self::HEADER_FORWARDED] && $this->headers->has(self::$trustedHeaders[self::HEADER_FORWARDED])) {
			$forwardedHeader = $this->headers->get(self::$trustedHeaders[self::HEADER_FORWARDED]);
			preg_match_all('{(for)=("?\[?)([a-z0-9\.:_\-/]*)}', $forwardedHeader, $matches);
			$clientIps = $matches[3];
		} elseif (self::$trustedHeaders[self::HEADER_CLIENT_IP] && $this->headers->has(self::$trustedHeaders[self::HEADER_CLIENT_IP])) {
			$clientIps = array_map('trim', explode(',', $this->headers->get(self::$trustedHeaders[self::HEADER_CLIENT_IP])));
		}

		$clientIps[] = $ip; // Complete the IP chain with the IP the request actually came from
		$firstTrustedIp = null;

		foreach ($clientIps as $key => $clientIp) {
			// Remove port (unfortunately, it does happen)
			if (preg_match('{((?:\d+\.){3}\d+)\:\d+}', $clientIp, $match)) {
				$clientIps[$key] = $clientIp = $match[1];
			}

			if (!filter_var($clientIp, FILTER_VALIDATE_IP)) {
				unset($clientIps[$key]);

				continue;
			}

			if (IpUtils::checkIp($clientIp, self::$trustedProxies)) {
				unset($clientIps[$key]);

				// Fallback to this when the client IP falls into the range of trusted proxies
				if (null === $firstTrustedIp) {
					$firstTrustedIp = $clientIp;
				}
			}
		}

		// Now the IP chain contains only untrusted proxies and the client IP
		return $clientIps ? array_reverse($clientIps) : array(
			$firstTrustedIp
		);
	}

	/**
	 * Returns the client IP address.
	 *
	 * This method can read the client IP address from the "X-Forwarded-For" header
	 * when trusted proxies were set via "setTrustedProxies()". The "X-Forwarded-For"
	 * header value is a comma+space separated list of IP addresses, the left-most
	 * being the original client, and each successive proxy that passed the request
	 * adding the IP address where it received the request from.
	 *
	 * If your reverse proxy uses a different header name than "X-Forwarded-For",
	 * ("Client-Ip" for instance), configure it via "setTrustedHeaderName()" with
	 * the "client-ip" key.
	 *
	 * @return string The client IP address
	 *        
	 * @see getClientIps()
	 * @see http://en.wikipedia.org/wiki/X-Forwarded-For
	 */
	public function getClientIp()
	{
		$ipAddresses = $this->getClientIps();

		return $ipAddresses[0];
	}

	/**
	 * Returns current script name.
	 *
	 * @return string
	 */
	public function getScriptName()
	{
		return $this->server->get('SCRIPT_NAME', $this->server->get('ORIG_SCRIPT_NAME', ''));
	}

	/**
	 * Returns the path being requested relative to the executed script.
	 *
	 * The path info always starts with a /.
	 *
	 * Suppose this request is instantiated from /mysite on localhost:
	 *
	 * * http://localhost/mysite returns an empty string
	 * * http://localhost/mysite/about returns '/about'
	 * * http://localhost/mysite/enco%20ded returns '/enco%20ded'
	 * * http://localhost/mysite/about?var=1 returns '/about'
	 *
	 * @return string The raw path (i.e. not urldecoded)
	 */
	public function getPathInfo()
	{
		if (null === $this->pathInfo) {
			$this->pathInfo = $this->preparePathInfo();
		}

		return $this->pathInfo;
	}

	/**
	 * Returns the root path from which this request is executed.
	 *
	 * Suppose that an index.php file instantiates this request object:
	 *
	 * * http://localhost/index.php returns an empty string
	 * * http://localhost/index.php/page returns an empty string
	 * * http://localhost/web/index.php returns '/web'
	 * * http://localhost/we%20b/index.php returns '/we%20b'
	 *
	 * @return string The raw path (i.e. not urldecoded)
	 */
	public function getBasePath()
	{
		if (null === $this->basePath) {
			$this->basePath = $this->prepareBasePath();
		}

		return $this->basePath;
	}

	/**
	 * Returns the root URL from which this request is executed.
	 *
	 * The base URL never ends with a /.
	 *
	 * This is similar to getBasePath(), except that it also includes the
	 * script filename (e.g. index.php) if one exists.
	 *
	 * @return string The raw URL (i.e. not urldecoded)
	 */
	public function getBaseUrl()
	{
		if (null === $this->baseUrl) {
			$this->baseUrl = $this->prepareBaseUrl();
		}

		return $this->baseUrl;
	}

	/**
	 * Gets the request's scheme.
	 *
	 * @return string
	 */
	public function getScheme()
	{
		return $this->isSecure() ? 'https' : 'http';
	}

	/**
	 * Returns the port on which the request is made.
	 *
	 * This method can read the client port from the "X-Forwarded-Port" header
	 * when trusted proxies were set via "setTrustedProxies()".
	 *
	 * The "X-Forwarded-Port" header must contain the client port.
	 *
	 * If your reverse proxy uses a different header name than "X-Forwarded-Port",
	 * configure it via "setTrustedHeaderName()" with the "client-port" key.
	 *
	 * @return string
	 */
	public function getPort()
	{
		if ($this->isFromTrustedProxy()) {
			if (self::$trustedHeaders[self::HEADER_CLIENT_PORT] && $port = $this->headers->get(self::$trustedHeaders[self::HEADER_CLIENT_PORT])) {
				return $port;
			}

			if (self::$trustedHeaders[self::HEADER_CLIENT_PROTO] && 'https' === $this->headers->get(self::$trustedHeaders[self::HEADER_CLIENT_PROTO], 'http')) {
				return 443;
			}
		}

		if ($host = $this->headers->get('HOST')) {
			if ($host[0] === '[') {
				$pos = strpos($host, ':', strrpos($host, ']'));
			} else {
				$pos = strrpos($host, ':');
			}

			if (false !== $pos) {
				return (int) substr($host, $pos + 1);
			}

			return 'https' === $this->getScheme() ? 443 : 80;
		}

		return $this->server->get('SERVER_PORT');
	}

	/**
	 * Returns the user.
	 *
	 * @return string|null
	 */
	public function getUser()
	{
		return $this->headers->get('PHP_AUTH_USER');
	}

	/**
	 * Returns the password.
	 *
	 * @return string|null
	 */
	public function getPassword()
	{
		return $this->headers->get('PHP_AUTH_PW');
	}

	/**
	 * Gets the user info.
	 *
	 * @return string A user name and, optionally, scheme-specific information about how to gain authorization to access the server
	 */
	public function getUserInfo()
	{
		$userinfo = $this->getUser();

		$pass = $this->getPassword();
		if ('' != $pass) {
			$userinfo .= ":$pass";
		}

		return $userinfo;
	}

	/**
	 * Returns the HTTP host being requested.
	 *
	 * The port name will be appended to the host if it's non-standard.
	 *
	 * @return string
	 */
	public function getHttpHost()
	{
		$scheme = $this->getScheme();
		$port = $this->getPort();

		if (('http' == $scheme && $port == 80) || ('https' == $scheme && $port == 443)) {
			return $this->getHost();
		}

		return $this->getHost() . ':' . $port;
	}

	/**
	 * Returns the requested URI (path and query string).
	 *
	 * @return string The raw URI (i.e. not URI decoded)
	 */
	public function getRequestUri()
	{
		if (null === $this->requestUri) {
			$this->requestUri = $this->prepareRequestUri();
		}

		return $this->requestUri;
	}

	/**
	 * Gets the scheme and HTTP host.
	 *
	 * If the URL was called with basic authentication, the user
	 * and the password are not added to the generated string.
	 *
	 * @return string The scheme and HTTP host
	 */
	public function getSchemeAndHttpHost()
	{
		return $this->getScheme() . '://' . $this->getHttpHost();
	}

	/**
	 * Generates a normalized URI (URL) for the Request.
	 *
	 * @return string A normalized URI (URL) for the Request
	 *        
	 * @see getQueryString()
	 */
	public function getUri()
	{
		if (null !== $qs = $this->getQueryString()) {
			$qs = '?' . $qs;
		}

		return $this->getSchemeAndHttpHost() . $this->getBaseUrl() . $this->getPathInfo() . $qs;
	}

	/**
	 * Generates a normalized URI for the given path.
	 *
	 * @param string $path
	 *            A path to use instead of the current one
	 *            
	 * @return string The normalized URI for the path
	 */
	public function getUriForPath($path)
	{
		return $this->getSchemeAndHttpHost() . $this->getBaseUrl() . $path;
	}

	/**
	 * Returns the path as relative reference from the current Request path.
	 *
	 * Only the URIs path component (no schema, host etc.) is relevant and must be given.
	 * Both paths must be absolute and not contain relative parts.
	 * Relative URLs from one resource to another are useful when generating self-contained downloadable document archives.
	 * Furthermore, they can be used to reduce the link size in documents.
	 *
	 * Example target paths, given a base path of "/a/b/c/d":
	 * - "/a/b/c/d" -> ""
	 * - "/a/b/c/" -> "./"
	 * - "/a/b/" -> "../"
	 * - "/a/b/c/other" -> "other"
	 * - "/a/x/y" -> "../../x/y"
	 *
	 * @param string $path
	 *            The target path
	 *            
	 * @return string The relative target path
	 */
	public function getRelativeUriForPath($path)
	{
		// be sure that we are dealing with an absolute path
		if (!isset($path[0]) || '/' !== $path[0]) {
			return $path;
		}

		if ($path === $basePath = $this->getPathInfo()) {
			return '';
		}

		$sourceDirs = explode('/', isset($basePath[0]) && '/' === $basePath[0] ? substr($basePath, 1) : $basePath);
		$targetDirs = explode('/', isset($path[0]) && '/' === $path[0] ? substr($path, 1) : $path);
		array_pop($sourceDirs);
		$targetFile = array_pop($targetDirs);

		foreach ($sourceDirs as $i => $dir) {
			if (isset($targetDirs[$i]) && $dir === $targetDirs[$i]) {
				unset($sourceDirs[$i], $targetDirs[$i]);
			} else {
				break;
			}
		}

		$targetDirs[] = $targetFile;
		$path = str_repeat('../', count($sourceDirs)) . implode('/', $targetDirs);

		// A reference to the same base directory or an empty subdirectory must be prefixed with "./".
		// This also applies to a segment with a colon character (e.g., "file:colon") that cannot be used
		// as the first segment of a relative-path reference, as it would be mistaken for a scheme name
		// (see http://tools.ietf.org/html/rfc3986#section-4.2).
		return !isset($path[0]) || '/' === $path[0] || false !== ($colonPos = strpos($path, ':')) && ($colonPos < ($slashPos = strpos($path, '/')) || false === $slashPos) ? "./$path" : $path;
	}

	/**
	 * Generates the normalized query string for the Request.
	 *
	 * It builds a normalized query string, where keys/value pairs are alphabetized
	 * and have consistent escaping.
	 *
	 * @return string|null A normalized query string for the Request
	 */
	public function getQueryString()
	{
		$qs = static::normalizeQueryString($this->server->get('QUERY_STRING'));

		return '' === $qs ? null : $qs;
	}

	/**
	 * Checks whether the request is secure or not.
	 *
	 * This method can read the client protocol from the "X-Forwarded-Proto" header
	 * when trusted proxies were set via "setTrustedProxies()".
	 *
	 * The "X-Forwarded-Proto" header must contain the protocol: "https" or "http".
	 *
	 * If your reverse proxy uses a different header name than "X-Forwarded-Proto"
	 * ("SSL_HTTPS" for instance), configure it via "setTrustedHeaderName()" with
	 * the "client-proto" key.
	 *
	 * @return bool
	 */
	public function isSecure()
	{
		if ($this->isFromTrustedProxy() && self::$trustedHeaders[self::HEADER_CLIENT_PROTO] && $proto = $this->headers->get(self::$trustedHeaders[self::HEADER_CLIENT_PROTO])) {
			return in_array(strtolower(current(explode(',', $proto))), array(
				'https',
				'on',
				'ssl',
				'1'
			));
		}

		$https = $this->server->get('HTTPS');

		return !empty($https) && 'off' !== strtolower($https);
	}

	/**
	 * Returns the host name.
	 *
	 * This method can read the client host name from the "X-Forwarded-Host" header
	 * when trusted proxies were set via "setTrustedProxies()".
	 *
	 * The "X-Forwarded-Host" header must contain the client host name.
	 *
	 * If your reverse proxy uses a different header name than "X-Forwarded-Host",
	 * configure it via "setTrustedHeaderName()" with the "client-host" key.
	 *
	 * @return string
	 *
	 * @throws \UnexpectedValueException when the host name is invalid
	 */
	public function getHost()
	{
		if ($this->isFromTrustedProxy() && self::$trustedHeaders[self::HEADER_CLIENT_HOST] && $host = $this->headers->get(self::$trustedHeaders[self::HEADER_CLIENT_HOST])) {
			$elements = explode(',', $host);

			$host = $elements[count($elements) - 1];
		} elseif (!$host = $this->headers->get('HOST')) {
			if (!$host = $this->server->get('SERVER_NAME')) {
				$host = $this->server->get('SERVER_ADDR', '');
			}
		}

		// trim and remove port number from host
		// host is lowercase as per RFC 952/2181
		$host = strtolower(preg_replace('/:\d+$/', '', trim($host)));

		// as the host can come from the user (HTTP_HOST and depending on the configuration, SERVER_NAME too can come from the user)
		// check that it does not contain forbidden characters (see RFC 952 and RFC 2181)
		// use preg_replace() instead of preg_match() to prevent DoS attacks with long host names
		if ($host && '' !== preg_replace('/(?:^\[)?[a-zA-Z0-9-:\]_]+\.?/', '', $host)) {
			throw new \UnexpectedValueException(sprintf('Invalid Host "%s"', $host));
		}

		if (count(self::$trustedHostPatterns) > 0) {
			// to avoid host header injection attacks, you should provide a list of trusted host patterns

			if (in_array($host, self::$trustedHosts)) {
				return $host;
			}

			foreach (self::$trustedHostPatterns as $pattern) {
				if (preg_match($pattern, $host)) {
					self::$trustedHosts[] = $host;

					return $host;
				}
			}

			throw new \UnexpectedValueException(sprintf('Untrusted Host "%s"', $host));
		}

		return $host;
	}

	/**
	 * Sets the request method.
	 *
	 * @param string $method            
	 */
	public function setMethod($method)
	{
		$this->method = null;
		$this->server->set('REQUEST_METHOD', $method);
	}

	/**
	 * Gets the request "intended" method.
	 *
	 * If the X-HTTP-Method-Override header is set, and if the method is a POST,
	 * then it is used to determine the "real" intended HTTP method.
	 *
	 * The _method request parameter can also be used to determine the HTTP method,
	 * but only if enableHttpMethodParameterOverride() has been called.
	 *
	 * The method is always an uppercased string.
	 *
	 * @return string The request method
	 *        
	 * @see getRealMethod()
	 */
	public function getMethod()
	{
		if (null === $this->method) {
			$this->method = strtoupper($this->server->get('REQUEST_METHOD', 'GET'));

			if ('POST' === $this->method) {
				if ($method = $this->headers->get('X-HTTP-METHOD-OVERRIDE')) {
					$this->method = strtoupper($method);
				} elseif (self::$httpMethodParameterOverride) {
					$this->method = strtoupper($this->request->get('_method', $this->query->get('_method', 'POST')));
				}
			}
		}

		return $this->method;
	}

	/**
	 * Gets the "real" request method.
	 *
	 * @return string The request method
	 *        
	 * @see getMethod()
	 */
	public function getRealMethod()
	{
		return strtoupper($this->server->get('REQUEST_METHOD', 'GET'));
	}

	/**
	 * Gets the mime type associated with the format.
	 *
	 * @param string $format
	 *            The format
	 *            
	 * @return string The associated mime type (null if not found)
	 */
	public function getMimeType($format)
	{
		if (null === static::$formats) {
			static::initializeFormats();
		}

		return isset(static::$formats[$format]) ? static::$formats[$format][0] : null;
	}

	/**
	 * Gets the format associated with the mime type.
	 *
	 * @param string $mimeType
	 *            The associated mime type
	 *            
	 * @return string|null The format (null if not found)
	 */
	public function getFormat($mimeType)
	{
		$canonicalMimeType = null;
		if (false !== $pos = strpos($mimeType, ';')) {
			$canonicalMimeType = substr($mimeType, 0, $pos);
		}

		if (null === static::$formats) {
			static::initializeFormats();
		}

		foreach (static::$formats as $format => $mimeTypes) {
			if (in_array($mimeType, (array) $mimeTypes)) {
				return $format;
			}
			if (null !== $canonicalMimeType && in_array($canonicalMimeType, (array) $mimeTypes)) {
				return $format;
			}
		}
	}

	/**
	 * Associates a format with mime types.
	 *
	 * @param string $format
	 *            The format
	 * @param string|array $mimeTypes
	 *            The associated mime types (the preferred one must be the first as it will be used as the content type)
	 */
	public function setFormat($format, $mimeTypes)
	{
		if (null === static::$formats) {
			static::initializeFormats();
		}

		static::$formats[$format] = is_array($mimeTypes) ? $mimeTypes : array(
			$mimeTypes
		);
	}

	/**
	 * Gets the request format.
	 *
	 * Here is the process to determine the format:
	 *
	 * * format defined by the user (with setRequestFormat())
	 * * _format request parameter
	 * * $default
	 *
	 * @param string $default
	 *            The default format
	 *            
	 * @return string The request format
	 */
	public function getRequestFormat($default = 'html')
	{
		if (null === $this->format) {
			$this->format = $this->attributes->get('_format', $default);
		}

		return $this->format;
	}

	/**
	 * Sets the request format.
	 *
	 * @param string $format
	 *            The request format.
	 */
	public function setRequestFormat($format)
	{
		$this->format = $format;
	}

	/**
	 * Gets the format associated with the request.
	 *
	 * @return string|null The format (null if no content type is present)
	 */
	public function getContentType()
	{
		return $this->getFormat($this->headers->get('CONTENT_TYPE'));
	}

	/**
	 * Sets the default locale.
	 *
	 * @param string $locale            
	 */
	public function setDefaultLocale($locale)
	{
		$this->defaultLocale = $locale;

		if (null === $this->locale) {
			$this->setPhpDefaultLocale($locale);
		}
	}

	/**
	 * Get the default locale.
	 *
	 * @return string
	 */
	public function getDefaultLocale()
	{
		return $this->defaultLocale;
	}

	/**
	 * Sets the locale.
	 *
	 * @param string $locale            
	 */
	public function setLocale($locale)
	{
		$this->setPhpDefaultLocale($this->locale = $locale);
	}

	/**
	 * Get the locale.
	 *
	 * @return string
	 */
	public function getLocale()
	{
		return null === $this->locale ? $this->defaultLocale : $this->locale;
	}

	/**
	 * Checks if the request method is of specified type.
	 *
	 * @param string $method
	 *            Uppercase request method (GET, POST etc).
	 *            
	 * @return bool
	 */
	public function isMethod($method)
	{
		return $this->getMethod() === strtoupper($method);
	}

	/**
	 * Checks whether the method is safe or not.
	 *
	 * @return bool
	 */
	public function isMethodSafe()
	{
		return in_array($this->getMethod(), array(
			'GET',
			'HEAD'
		));
	}

	/**
	 * Returns the request body content.
	 *
	 * @param bool $asResource
	 *            If true, a resource will be returned
	 *            
	 * @return string|resource The request body content or a resource to read the body stream.
	 *        
	 * @throws \LogicException
	 */
	public function getContent($asResource = false)
	{
		$currentContentIsResource = is_resource($this->content);
		if (PHP_VERSION_ID < 50600 && false === $this->content) {
			throw new \LogicException('getContent() can only be called once when using the resource return type and PHP below 5.6.');
		}

		if (true === $asResource) {
			if ($currentContentIsResource) {
				rewind($this->content);

				return $this->content;
			}

			// Content passed in parameter (test)
			if (is_string($this->content)) {
				$resource = fopen('php://temp', 'r+');
				fwrite($resource, $this->content);
				rewind($resource);

				return $resource;
			}

			$this->content = false;

			return fopen('php://input', 'rb');
		}

		if ($currentContentIsResource) {
			rewind($this->content);

			return stream_get_contents($this->content);
		}

		if (null === $this->content) {
			$this->content = file_get_contents('php://input');
		}

		return $this->content;
	}

	/**
	 * Gets the Etags.
	 *
	 * @return array The entity tags
	 */
	public function getETags()
	{
		return preg_split('/\s*,\s*/', $this->headers->get('if_none_match'), null, PREG_SPLIT_NO_EMPTY);
	}

	/**
	 *
	 * @return bool
	 */
	public function isNoCache()
	{
		return $this->headers->hasCacheControlDirective('no-cache') || 'no-cache' == $this->headers->get('Pragma');
	}

	/**
	 * Returns the preferred language.
	 *
	 * @param array $locales
	 *            An array of ordered available locales
	 *            
	 * @return string|null The preferred locale
	 */
	public function getPreferredLanguage(array $locales = null)
	{
		$preferredLanguages = $this->getLanguages();

		if (empty($locales)) {
			return isset($preferredLanguages[0]) ? $preferredLanguages[0] : null;
		}

		if (!$preferredLanguages) {
			return $locales[0];
		}

		$extendedPreferredLanguages = array();
		foreach ($preferredLanguages as $language) {
			$extendedPreferredLanguages[] = $language;
			if (false !== $position = strpos($language, '_')) {
				$superLanguage = substr($language, 0, $position);
				if (!in_array($superLanguage, $preferredLanguages)) {
					$extendedPreferredLanguages[] = $superLanguage;
				}
			}
		}

		$preferredLanguages = array_values(array_intersect($extendedPreferredLanguages, $locales));

		return isset($preferredLanguages[0]) ? $preferredLanguages[0] : $locales[0];
	}

	/**
	 * Gets a list of languages acceptable by the client browser.
	 *
	 * @return array Languages ordered in the user browser preferences
	 */
	public function getLanguages()
	{
		if (null !== $this->languages) {
			return $this->languages;
		}

		$languages = AcceptHeader::fromString($this->headers->get('Accept-Language'))->all();
		$this->languages = array();
		foreach ($languages as $lang => $acceptHeaderItem) {
			if (false !== strpos($lang, '-')) {
				$codes = explode('-', $lang);
				if ('i' === $codes[0]) {
					// Language not listed in ISO 639 that are not variants
					// of any listed language, which can be registered with the
					// i-prefix, such as i-cherokee
					if (count($codes) > 1) {
						$lang = $codes[1];
					}
				} else {
					for ($i = 0, $max = count($codes); $i < $max; ++$i) {
						if ($i === 0) {
							$lang = strtolower($codes[0]);
						} else {
							$lang .= '_' . strtoupper($codes[$i]);
						}
					}
				}
			}

			$this->languages[] = $lang;
		}

		return $this->languages;
	}

	/**
	 * Gets a list of charsets acceptable by the client browser.
	 *
	 * @return array List of charsets in preferable order
	 */
	public function getCharsets()
	{
		if (null !== $this->charsets) {
			return $this->charsets;
		}

		return $this->charsets = array_keys(AcceptHeader::fromString($this->headers->get('Accept-Charset'))->all());
	}

	/**
	 * Gets a list of encodings acceptable by the client browser.
	 *
	 * @return array List of encodings in preferable order
	 */
	public function getEncodings()
	{
		if (null !== $this->encodings) {
			return $this->encodings;
		}

		return $this->encodings = array_keys(AcceptHeader::fromString($this->headers->get('Accept-Encoding'))->all());
	}

	/**
	 * Gets a list of content types acceptable by the client browser.
	 *
	 * @return array List of content types in preferable order
	 */
	public function getAcceptableContentTypes()
	{
		if (null !== $this->acceptableContentTypes) {
			return $this->acceptableContentTypes;
		}

		return $this->acceptableContentTypes = array_keys(AcceptHeader::fromString($this->headers->get('Accept'))->all());
	}

	/**
	 * Returns true if the request is a XMLHttpRequest.
	 *
	 * It works if your JavaScript library sets an X-Requested-With HTTP header.
	 * It is known to work with common JavaScript frameworks:
	 *
	 * @link http://en.wikipedia.org/wiki/List_of_Ajax_frameworks#JavaScript
	 *      
	 * @return bool true if the request is an XMLHttpRequest, false otherwise
	 */
	public function isXmlHttpRequest()
	{
		return 'XMLHttpRequest' == $this->headers->get('X-Requested-With');
	}

	/*
	 * The following methods are derived from code of the Zend Framework (1.10dev - 2010-01-24)
	 *
	 * Code subject to the new BSD license (http://framework.zend.com/license/new-bsd).
	 *
	 * Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
	 */

	protected function prepareRequestUri()
	{
		$requestUri = '';

		if ($this->headers->has('X_ORIGINAL_URL')) {
			// IIS with Microsoft Rewrite Module
			$requestUri = $this->headers->get('X_ORIGINAL_URL');
			$this->headers->remove('X_ORIGINAL_URL');
			$this->server->remove('HTTP_X_ORIGINAL_URL');
			$this->server->remove('UNENCODED_URL');
			$this->server->remove('IIS_WasUrlRewritten');
		} elseif ($this->headers->has('X_REWRITE_URL')) {
			// IIS with ISAPI_Rewrite
			$requestUri = $this->headers->get('X_REWRITE_URL');
			$this->headers->remove('X_REWRITE_URL');
		} elseif ($this->server->get('IIS_WasUrlRewritten') == '1' && $this->server->get('UNENCODED_URL') != '') {
			// IIS7 with URL Rewrite: make sure we get the unencoded URL (double slash problem)
			$requestUri = $this->server->get('UNENCODED_URL');
			$this->server->remove('UNENCODED_URL');
			$this->server->remove('IIS_WasUrlRewritten');
		} elseif ($this->server->has('REQUEST_URI')) {
			$requestUri = $this->server->get('REQUEST_URI');
			// HTTP proxy reqs setup request URI with scheme and host [and port] + the URL path, only use URL path
			$schemeAndHttpHost = $this->getSchemeAndHttpHost();
			if (strpos($requestUri, $schemeAndHttpHost) === 0) {
				$requestUri = substr($requestUri, strlen($schemeAndHttpHost));
			}
		} elseif ($this->server->has('ORIG_PATH_INFO')) {
			// IIS 5.0, PHP as CGI
			$requestUri = $this->server->get('ORIG_PATH_INFO');
			if ('' != $this->server->get('QUERY_STRING')) {
				$requestUri .= '?' . $this->server->get('QUERY_STRING');
			}
			$this->server->remove('ORIG_PATH_INFO');
		}

		// normalize the request URI to ease creating sub-requests from this request
		$this->server->set('REQUEST_URI', $requestUri);

		return $requestUri;
	}

	/**
	 * Prepares the base URL.
	 *
	 * @return string
	 */
	protected function prepareBaseUrl()
	{
		$filename = basename($this->server->get('SCRIPT_FILENAME'));

		if (basename($this->server->get('SCRIPT_NAME')) === $filename) {
			$baseUrl = $this->server->get('SCRIPT_NAME');
		} elseif (basename($this->server->get('PHP_SELF')) === $filename) {
			$baseUrl = $this->server->get('PHP_SELF');
		} elseif (basename($this->server->get('ORIG_SCRIPT_NAME')) === $filename) {
			$baseUrl = $this->server->get('ORIG_SCRIPT_NAME'); // 1and1 shared hosting compatibility
		} else {
			// Backtrack up the script_filename to find the portion matching
			// php_self
			$path = $this->server->get('PHP_SELF', '');
			$file = $this->server->get('SCRIPT_FILENAME', '');
			$segs = explode('/', trim($file, '/'));
			$segs = array_reverse($segs);
			$index = 0;
			$last = count($segs);
			$baseUrl = '';
			do {
				$seg = $segs[$index];
				$baseUrl = '/' . $seg . $baseUrl;
				++$index;
			} while ($last > $index && (false !== $pos = strpos($path, $baseUrl)) && 0 != $pos);
		}

		// Does the baseUrl have anything in common with the request_uri?
		$requestUri = $this->getRequestUri();

		if ($baseUrl && false !== $prefix = $this->getUrlencodedPrefix($requestUri, $baseUrl)) {
			// full $baseUrl matches
			return $prefix;
		}

		if ($baseUrl && false !== $prefix = $this->getUrlencodedPrefix($requestUri, rtrim(dirname($baseUrl), '/' . DIRECTORY_SEPARATOR) . '/')) {
			// directory portion of $baseUrl matches
			return rtrim($prefix, '/' . DIRECTORY_SEPARATOR);
		}

		$truncatedRequestUri = $requestUri;
		if (false !== $pos = strpos($requestUri, '?')) {
			$truncatedRequestUri = substr($requestUri, 0, $pos);
		}

		$basename = basename($baseUrl);
		if (empty($basename) || !strpos(rawurldecode($truncatedRequestUri), $basename)) {
			// no match whatsoever; set it blank
			return '';
		}

		// If using mod_rewrite or ISAPI_Rewrite strip the script filename
		// out of baseUrl. $pos !== 0 makes sure it is not matching a value
		// from PATH_INFO or QUERY_STRING
		if (strlen($requestUri) >= strlen($baseUrl) && (false !== $pos = strpos($requestUri, $baseUrl)) && $pos !== 0) {
			$baseUrl = substr($requestUri, 0, $pos + strlen($baseUrl));
		}

		return rtrim($baseUrl, '/' . DIRECTORY_SEPARATOR);
	}

	/**
	 * Prepares the base path.
	 *
	 * @return string base path
	 */
	protected function prepareBasePath()
	{
		$filename = basename($this->server->get('SCRIPT_FILENAME'));
		$baseUrl = $this->getBaseUrl();
		if (empty($baseUrl)) {
			return '';
		}

		if (basename($baseUrl) === $filename) {
			$basePath = dirname($baseUrl);
		} else {
			$basePath = $baseUrl;
		}

		if ('\\' === DIRECTORY_SEPARATOR) {
			$basePath = str_replace('\\', '/', $basePath);
		}

		return rtrim($basePath, '/');
	}

	/**
	 * Prepares the path info.
	 *
	 * @return string path info
	 */
	protected function preparePathInfo()
	{
		$baseUrl = $this->getBaseUrl();

		if (null === ($requestUri = $this->getRequestUri())) {
			return '/';
		}

		// Remove the query string from REQUEST_URI
		if ($pos = strpos($requestUri, '?')) {
			$requestUri = substr($requestUri, 0, $pos);
		}

		$pathInfo = substr($requestUri, strlen($baseUrl));
		if (null !== $baseUrl && (false === $pathInfo || '' === $pathInfo)) {
			// If substr() returns false then PATH_INFO is set to an empty string
			return '/';
		} elseif (null === $baseUrl) {
			return $requestUri;
		}

		return (string) $pathInfo;
	}

	/**
	 * Initializes HTTP request formats.
	 */
	protected static function initializeFormats()
	{
		static::$formats = array(
			'html' => array(
				'text/html',
				'application/xhtml+xml'
			),
			'txt' => array(
				'text/plain'
			),
			'js' => array(
				'application/javascript',
				'application/x-javascript',
				'text/javascript'
			),
			'css' => array(
				'text/css'
			),
			'json' => array(
				'application/json',
				'application/x-json'
			),
			'xml' => array(
				'text/xml',
				'application/xml',
				'application/x-xml'
			),
			'rdf' => array(
				'application/rdf+xml'
			),
			'atom' => array(
				'application/atom+xml'
			),
			'rss' => array(
				'application/rss+xml'
			),
			'form' => array(
				'application/x-www-form-urlencoded'
			)
		);
	}

	/**
	 * Sets the default PHP locale.
	 *
	 * @param string $locale            
	 */
	private function setPhpDefaultLocale($locale)
	{
		// if either the class Locale doesn't exist, or an exception is thrown when
		// setting the default locale, the intl module is not installed, and
		// the call can be ignored:
		try {
			if (class_exists('Locale', false)) {
				\Locale::setDefault($locale);
			}
		} catch (\Exception $e) {
			
		}
	}

	/*
	 * Returns the prefix as encoded in the string when the string starts with
	 * the given prefix, false otherwise.
	 *
	 * @param string $string The urlencoded string
	 * @param string $prefix The prefix not encoded
	 *
	 * @return string|false The prefix as it is encoded in $string, or false
	 */

	private function getUrlencodedPrefix($string, $prefix)
	{
		if (0 !== strpos(rawurldecode($string), $prefix)) {
			return false;
		}

		$len = strlen($prefix);

		if (preg_match(sprintf('#^(%%[[:xdigit:]]{2}|.){%d}#', $len), $string, $match)) {
			return $match[0];
		}

		return false;
	}

	private static function createRequestFromFactory(array $query = array(), array $request = array(), array $attributes = array(), array $cookies = array(), array $files = array(), array $server = array(), $content = null)
	{
		if (self::$requestFactory) {
			$request = call_user_func(self::$requestFactory, $query, $request, $attributes, $cookies, $files, $server, $content);

			if (!$request instanceof self) {
				throw new \LogicException('The Request factory must return an instance of Kant\Http\Request.');
			}

			return $request;
		}

		return new static($query, $request, $attributes, $cookies, $files, $server, $content);
	}

	private function isFromTrustedProxy()
	{
		return self::$trustedProxies && IpUtils::checkIp($this->server->get('REMOTE_ADDR'), self::$trustedProxies);
	}

	/**
	 * Create a new Kant HTTP request from server variables.
	 *
	 * @return static
	 */
	public static function capture()
	{
		static::enableHttpMethodParameterOverride();

		return static::createFromBase(Request::createFromGlobals());
	}

	/**
	 * Return the Request instance.
	 *
	 * @return $this
	 */
	public static function instance($options = [])
	{
		if (is_null(self::$instance)) {
			self::$instance = new static($options);
		}
		return self::$instance;
	}

	/**
	 * Get the request method.
	 *
	 * @return string
	 */
	public function method()
	{
		return $this->getMethod();
	}

	/**
	 * Get the root URL for the application.
	 *
	 * @return string
	 */
	public function root()
	{
		return rtrim($this->getSchemeAndHttpHost() . $this->getBaseUrl(), '/');
	}

	/**
	 * Get the URL (no query string) for the request.
	 *
	 * @return string
	 */
	public function url()
	{
		return rtrim(preg_replace('/\?.*/', '', $this->getUri()), '/');
	}

	/**
	 * Get the full URL for the request.
	 *
	 * @return string
	 */
	public function fullUrl()
	{
		$query = $this->getQueryString();

		$question = $this->getBaseUrl() . $this->getPathInfo() == '/' ? '/?' : '?';

		return $query ? $this->url() . $question . $query : $this->url();
	}

	/**
	 * Get the full URL for the request with the added query string parameters.
	 *
	 * @param array $query            
	 * @return string
	 */
	public function fullUrlWithQuery(array $query)
	{
		return count($this->query()) > 0 ? $this->url() . '/?' . http_build_query(array_merge($this->query(), $query)) : $this->fullUrl() . '?' . http_build_query($query);
	}

	/**
	 * Get the current path info for the request.
	 *
	 * @return string
	 */
	public function path()
	{
		$pattern = trim($this->getPathInfo(), '/');

		return $pattern == '' ? '/' : $pattern;
	}

	/**
	 * Get the current encoded path info for the request.
	 *
	 * @return string
	 */
	public function decodedPath()
	{
		return rawurldecode($this->path());
	}

	/**
	 * Get a segment from the URI (1 based index).
	 *
	 * @param int $index            
	 * @param string|null $default            
	 * @return string|null
	 */
	public function segment($index, $default = null)
	{
		return Arr::get($this->segments(), $index - 1, $default);
	}

	/**
	 * Get all of the segments for the request path.
	 *
	 * @return array
	 */
	public function segments()
	{
		$segments = explode('/', $this->path());

		return array_values(array_filter($segments, function ($v) {
					return $v != '';
				}));
	}

	/**
	 * Determine if the current request URI matches a pattern.
	 *
	 * @param
	 *            mixed string
	 * @return bool
	 */
	public function is()
	{
		foreach (func_get_args() as $pattern) {
			if (Str::is($pattern, urldecode($this->path()))) {
				return true;
			}
		}

		return false;
	}

	/**
	 * Determine if the current request URL and query string matches a pattern.
	 *
	 * @param
	 *            mixed string
	 * @return bool
	 */
	public function fullUrlIs()
	{
		$url = $this->fullUrl();

		foreach (func_get_args() as $pattern) {
			if (Str::is($pattern, $url)) {
				return true;
			}
		}

		return false;
	}

	/**
	 * Determine if the request is the result of an AJAX call.
	 *
	 * @return bool
	 */
	public function ajax()
	{
		return $this->isXmlHttpRequest();
	}

	/**
	 * Determine if the request is the result of an PJAX call.
	 *
	 * @return bool
	 */
	public function pjax()
	{
		return $this->headers->get('X-PJAX') == true;
	}

	/**
	 * Determine if the request is over HTTPS.
	 *
	 * @return bool
	 */
	public function secure()
	{
		return $this->isSecure();
	}

	/**
	 * Returns the client IP address.
	 *
	 * @return string
	 */
	public function ip()
	{
		return $this->getClientIp();
	}

	/**
	 * Returns the client IP addresses.
	 *
	 * @return array
	 */
	public function ips()
	{
		return $this->getClientIps();
	}

	/**
	 * Determine if the request contains a given input item key.
	 *
	 * @param string|array $key            
	 * @return bool
	 */
	public function exists($key)
	{
		$keys = is_array($key) ? $key : func_get_args();

		$input = $this->all();

		foreach ($keys as $value) {
			if (!array_key_exists($value, $input)) {
				return false;
			}
		}

		return true;
	}

	/**
	 * Determine if the request contains a non-empty value for an input item.
	 *
	 * @param string|array $key            
	 * @return bool
	 */
	public function has($key)
	{
		$keys = is_array($key) ? $key : func_get_args();

		foreach ($keys as $value) {
			if ($this->isEmptyString($value)) {
				return false;
			}
		}

		return true;
	}

	/**
	 * Determine if the given input key is an empty string for "has".
	 *
	 * @param string $key            
	 * @return bool
	 */
	protected function isEmptyString($key)
	{
		$value = $this->input($key);

		$boolOrArray = is_bool($value) || is_array($value);

		return !$boolOrArray && trim((string) $value) === '';
	}

	/**
	 * Get all of the input and files for the request.
	 *
	 * @return array
	 */
	public function all()
	{
		return array_replace_recursive($this->input(), $this->allFiles());
	}

	/**
	 * Retrieve an input item from the request.
	 *
	 * @param string $key            
	 * @param string|array|null $default            
	 * @return string|array
	 */
	public function input($key = null, $default = null)
	{
		$input = $this->getInputSource()->all() + $this->query->all();

		// return data_get($input, $key, $default);
		return Arr::get($input, $key, $default);
	}

	/**
	 * Get a subset of the items from the input data.
	 *
	 * @param array|mixed $keys            
	 * @return array
	 */
	public function only($keys)
	{
		$keys = is_array($keys) ? $keys : func_get_args();

		$results = [];

		$input = $this->all();

		foreach ($keys as $key) {
			// Arr::set($results, $key, data_get($input, $key));
			Arr::set($results, $key, Arr::get($input, $key));
		}

		return $results;
	}

	/**
	 * Get all of the input except for a specified array of items.
	 *
	 * @param array|mixed $keys            
	 * @return array
	 */
	public function except($keys)
	{
		$keys = is_array($keys) ? $keys : func_get_args();

		$results = $this->all();

		Arr::forget($results, $keys);

		return $results;
	}

	/**
	 * Retrieve a query string item from the request.
	 *
	 * @param string $key            
	 * @param string|array|null $default            
	 * @return string|array
	 */
	public function query($key = null, $default = null)
	{
		return $this->retrieveItem('query', $key, $default);
	}

	/**
	 * Determine if a cookie is set on the request.
	 *
	 * @param string $key            
	 * @return bool
	 */
	public function hasCookie($key)
	{
		return !is_null($this->cookie($key));
	}

	/**
	 * Retrieve a cookie from the request.
	 *
	 * @param string $key            
	 * @param string|array|null $default            
	 * @return string|array
	 */
	public function cookie($key = null, $default = null)
	{
		return $this->retrieveItem('cookies', $key, $default);
	}

	/**
	 * Get an array of all of the files on the request.
	 *
	 * @return array
	 */
	public function allFiles()
	{
		$files = $this->files->all();

		return $this->convertedFiles ? $this->convertedFiles : $this->convertedFiles = $this->convertUploadedFiles($files);
	}

	/**
	 * Convert the given array of Symfony UploadedFiles to custom Laravel UploadedFiles.
	 *
	 * @param array $files            
	 * @return array
	 */
	protected function convertUploadedFiles(array $files)
	{
		return array_map(function ($file) {
			if (is_null($file) || (is_array($file) && empty(array_filter($file)))) {
				return $file;
			}

			return is_array($file) ? $this->convertUploadedFiles($file) : UploadedFile::createFromBase($file);
		}, $files);
	}

	/**
	 * Retrieve a file from the request.
	 *
	 * @param string $key            
	 * @param mixed $default            
	 * @return \Kant\Http\File\UploadedFile|array|null
	 */
	public function file($key = null, $default = null)
	{
		// return data_get($this->allFiles(), $key, $default);
		return Arr::get($this->files->all(), $key, $default);
	}

	/**
	 * Determine if the uploaded data contains a file.
	 *
	 * @param string $key            
	 * @return bool
	 */
	public function hasFile($key)
	{
		if (!is_array($files = $this->file($key))) {
			$files = [
				$files
			];
		}

		foreach ($files as $file) {
			if ($this->isValidFile($file)) {
				return true;
			}
		}

		return false;
	}

	/**
	 * Check that the given file is a valid file instance.
	 *
	 * @param mixed $file            
	 * @return bool
	 */
	protected function isValidFile($file)
	{
		return $file instanceof SplFileInfo && $file->getPath() != '';
	}

	/**
	 * Retrieve a header from the request.
	 *
	 * @param string $key            
	 * @param string|array|null $default            
	 * @return string|array
	 */
	public function header($key = null, $default = null)
	{
		return $this->retrieveItem('headers', $key, $default);
	}

	/**
	 * Retrieve a server variable from the request.
	 *
	 * @param string $key            
	 * @param string|array|null $default            
	 * @return string|array
	 */
	public function server($key = null, $default = null)
	{
		return $this->retrieveItem('server', $key, $default);
	}

	/**
	 * Retrieve an old input item.
	 *
	 * @param string $key            
	 * @param string|array|null $default            
	 * @return string|array
	 */
	public function old($key = null, $default = null)
	{
		return $this->session()->getOldInput($key, $default);
	}

	/**
	 * Flash the input for the current request to the session.
	 *
	 * @param string $filter            
	 * @param array $keys            
	 * @return void
	 */
	public function flash($filter = null, $keys = [])
	{
		$flash = (!is_null($filter)) ? $this->$filter($keys) : $this->input();

		$this->session()->flashInput($flash);
	}

	/**
	 * Flash only some of the input to the session.
	 *
	 * @param array|mixed $keys            
	 * @return void
	 */
	public function flashOnly($keys)
	{
		$keys = is_array($keys) ? $keys : func_get_args();

		return $this->flash('only', $keys);
	}

	/**
	 * Flash only some of the input to the session.
	 *
	 * @param array|mixed $keys            
	 * @return void
	 */
	public function flashExcept($keys)
	{
		$keys = is_array($keys) ? $keys : func_get_args();

		return $this->flash('except', $keys);
	}

	/**
	 * Flush all of the old input from the session.
	 *
	 * @return void
	 */
	public function flush()
	{
		$this->session()->flashInput([]);
	}

	/**
	 * Retrieve a parameter item from a given source.
	 *
	 * @param string $source            
	 * @param string $key            
	 * @param string|array|null $default            
	 * @return string|array
	 */
	protected function retrieveItem($source, $key, $default)
	{
		if (is_null($key)) {
			return $this->$source->all();
		}

		return $this->$source->get($key, $default);
	}

	/**
	 * Merge new input into the current request's input array.
	 *
	 * @param array $input            
	 * @return void
	 */
	public function merge(array $input)
	{
		$this->getInputSource()->add($input);
	}

	/**
	 * Replace the input for the current request.
	 *
	 * @param array $input            
	 * @return void
	 */
	public function replace(array $input)
	{
		$this->getInputSource()->replace($input);
	}

	/**
	 * Get the JSON payload for the request.
	 *
	 * @param string $key            
	 * @param mixed $default            
	 * @return mixed
	 */
	public function json($key = null, $default = null)
	{
		if (!isset($this->json)) {
			$this->json = new ParameterBag((array) json_decode($this->getContent(), true));
		}

		if (is_null($key)) {
			return $this->json;
		}

		// return data_get($this->json->all(), $key, $default);
		return Arr::get($this->json->all(), $key, $default);
	}

	/**
	 * Get the input source for the request.
	 *
	 * @return \Kant\Http\ParameterBag
	 */
	protected function getInputSource()
	{
		if ($this->isJson()) {
			return $this->json();
		}

		return $this->getMethod() == 'GET' ? $this->query : $this->request;
	}

	/**
	 * Determine if the given content types match.
	 *
	 * @param string $actual            
	 * @param string $type            
	 * @return bool
	 */
	public static function matchesType($actual, $type)
	{
		if ($actual === $type) {
			return true;
		}

		$split = explode('/', $actual);

		if (isset($split[1]) && preg_match('/' . $split[0] . '\/.+\+' . $split[1] . '/', $type)) {
			return true;
		}

		return false;
	}

	/**
	 * Determine if the request is sending JSON.
	 *
	 * @return bool
	 */
	public function isJson()
	{
		return Str::contains($this->header('CONTENT_TYPE'), [
					'/json',
					'+json'
		]);
	}

	/**
	 * Determine if the current request is asking for JSON in return.
	 *
	 * @return bool
	 */
	public function wantsJson()
	{
		$acceptable = $this->getAcceptableContentTypes();

		return isset($acceptable[0]) && Str::contains($acceptable[0], [
					'/json',
					'+json'
		]);
	}

	/**
	 * Determines whether the current requests accepts a given content type.
	 *
	 * @param string|array $contentTypes            
	 * @return bool
	 */
	public function accepts($contentTypes)
	{
		$accepts = $this->getAcceptableContentTypes();

		if (count($accepts) === 0) {
			return true;
		}

		$types = (array) $contentTypes;

		foreach ($accepts as $accept) {
			if ($accept === '*/*' || $accept === '*') {
				return true;
			}

			foreach ($types as $type) {
				if ($this->matchesType($accept, $type) || $accept === strtok($type, '/') . '/*') {
					return true;
				}
			}
		}

		return false;
	}

	/**
	 * Return the most suitable content type from the given array based on content negotiation.
	 *
	 * @param string|array $contentTypes            
	 * @return string|null
	 */
	public function prefers($contentTypes)
	{
		$accepts = $this->getAcceptableContentTypes();

		$contentTypes = (array) $contentTypes;

		foreach ($accepts as $accept) {
			if (in_array($accept, [
						'*/*',
						'*'
					])) {
				return $contentTypes[0];
			}

			foreach ($contentTypes as $contentType) {
				$type = $contentType;

				if (!is_null($mimeType = $this->getMimeType($contentType))) {
					$type = $mimeType;
				}

				if ($this->matchesType($type, $accept) || $accept === strtok($type, '/') . '/*') {
					return $contentType;
				}
			}
		}
	}

	/**
	 * Determines whether a request accepts JSON.
	 *
	 * @return bool
	 */
	public function acceptsJson()
	{
		return $this->accepts('application/json');
	}

	/**
	 * Determines whether a request accepts HTML.
	 *
	 * @return bool
	 */
	public function acceptsHtml()
	{
		return $this->accepts('text/html');
	}

	/**
	 * Get the data format expected in the response.
	 *
	 * @param string $default            
	 * @return string
	 */
	public function format($default = 'html')
	{
		foreach ($this->getAcceptableContentTypes() as $type) {
			if ($format = $this->getFormat($type)) {
				return $format;
			}
		}

		return $default;
	}

	/**
	 * Get the bearer token from the request headers.
	 *
	 * @return string|null
	 */
	public function bearerToken()
	{
		$header = $this->header('Authorization', '');

		if (Str::startsWith($header, 'Bearer ')) {
			return Str::substr($header, 7);
		}
	}

	/**
	 * Create an Kant request from a Symfony instance.
	 *
	 * @param Request $request            
	 * @return Request
	 */
	public static function createFromBase(Request $request)
	{
		if ($request instanceof static) {
			return $request;
		}

		$content = $request->content;

		$request = (new static())->duplicate($request->query->all(), $request->request->all(), $request->attributes->all(), $request->cookies->all(), $request->files->all(), $request->server->all());

		$request->content = $content;

		$request->request = $request->getInputSource();

		return $request;
	}

	/**
	 * Get the session associated with the request.
	 *
	 * @return \Kant\Session\Store
	 *
	 * @throws \RuntimeException
	 */
	public function session()
	{
		if (!$this->hasSession()) {
			throw new RuntimeException('Session store not set on request.');
		}

		return $this->getSession();
	}

	/**
	 * Get the user making the request.
	 *
	 * @param string|null $guard            
	 * @return mixed
	 */
	public function user($guard = null)
	{
		return call_user_func($this->getUserResolver(), $guard);
	}

	/**
	 * Get the route handling the request.
	 *
	 * @param string|null $param            
	 *
	 * @return \Kant\Routing\Route|object|string
	 */
	public function route($param = null)
	{
		$route = call_user_func($this->getRouteResolver());

		if (is_null($route) || is_null($param)) {
			return $route;
		} else {
			return $route->parameter($param);
		}
	}

	/**
	 * Get a unique fingerprint for the request / route / IP address.
	 *
	 * @return string
	 *
	 * @throws \RuntimeException
	 */
	public function fingerprint()
	{
		if (!$this->route()) {
			throw new RuntimeException('Unable to generate fingerprint. Route unavailable.');
		}

		return sha1(implode('|', $this->route()->methods()) . '|' . $this->route()->domain() . '|' . $this->route()->uri() . '|' . $this->ip());
	}

	/**
	 * Get the user resolver callback.
	 *
	 * @return \Closure
	 */
	public function getUserResolver()
	{
		return $this->userResolver ?: function () {
			//
		};
	}

	/**
	 * Set the user resolver callback.
	 *
	 * @param \Closure $callback            
	 * @return $this
	 */
	public function setUserResolver(Closure $callback)
	{
		$this->userResolver = $callback;

		return $this;
	}

	/**
	 * Get the route resolver callback.
	 *
	 * @return \Closure
	 */
	public function getRouteResolver()
	{
		return $this->routeResolver ?: function () {
			//
		};
	}

	/**
	 * Set the route resolver callback.
	 *
	 * @param \Closure $callback            
	 * @return $this
	 */
	public function setRouteResolver(Closure $callback)
	{
		$this->routeResolver = $callback;

		return $this;
	}

	/**
	 * Returns the list of fields that should be returned by default by [[toArray()]] when no specific fields are specified.
	 *
	 * A field is a named element in the returned array by [[toArray()]].
	 */
	public function fields()
	{
		
	}

	/**
	 * Returns the list of additional fields that can be returned by [[toArray()]] in addition to those listed in [[fields()]].
	 */
	public function extraFields()
	{
		
	}

	/**
	 * Get all of the input and files for the request.
	 *
	 * @return array
	 */
	public function toArray(array $fields = [], array $expand = [], $recursive = true)
	{
		return $this->all();
	}

	/**
	 * Determine if the given offset exists.
	 *
	 * @param string $offset            
	 * @return bool
	 */
	public function offsetExists($offset)
	{
		return array_key_exists($offset, $this->all());
	}

	/**
	 * Get the value at the given offset.
	 *
	 * @param string $offset            
	 * @return mixed
	 */
	public function offsetGet($offset)
	{
		// return data_get($this->all(), $offset);
		return Arr::get($this->all(), $offset);
	}

	/**
	 * Set the value at the given offset.
	 *
	 * @param string $offset            
	 * @param mixed $value            
	 * @return void
	 */
	public function offsetSet($offset, $value)
	{
		return $this->getInputSource()->set($offset, $value);
	}

	/**
	 * Remove the value at the given offset.
	 *
	 * @param string $offset            
	 * @return void
	 */
	public function offsetUnset($offset)
	{
		return $this->getInputSource()->remove($offset);
	}

	/**
	 * Check if an input element is set on the request.
	 *
	 * @param string $key            
	 * @return bool
	 */
	public function __isset($key)
	{
		return !is_null($this->__get($key));
	}

	/**
	 * Get an input element from the request.
	 *
	 * @param string $key            
	 * @return mixed
	 */
	public function __get($key)
	{
		$all = $this->all();

		if (array_key_exists($key, $all)) {
			return $all[$key];
		} else {
			return $this->route($key);
		}
	}

}
