827 lines
22 KiB
PHP
827 lines
22 KiB
PHP
<?php
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/**
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* Request object for handling alternative HTTP requests
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*
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* Alternative HTTP requests can come from wireless units like mobile phones, palmtop computers,
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* and the like. These units have no use for Ajax requests, and this Component can tell how Cake
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* should respond to the different needs of a handheld computer and a desktop machine.
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs.controller.components
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* @since CakePHP(tm) v 0.10.4.1076
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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/**
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* Request object for handling HTTP requests
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*
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* @package cake
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* @subpackage cake.cake.libs.controller.components
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* @link http://book.cakephp.org/view/1291/Request-Handling
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*
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*/
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class RequestHandlerComponent extends Object {
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/**
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* The layout that will be switched to for Ajax requests
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*
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* @var string
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* @access public
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* @see RequestHandler::setAjax()
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*/
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var $ajaxLayout = 'ajax';
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/**
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* Determines whether or not callbacks will be fired on this component
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*
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* @var boolean
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* @access public
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*/
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var $enabled = true;
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/**
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* Holds the content-type of the response that is set when using
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* RequestHandler::respondAs()
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*
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* @var string
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* @access private
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*/
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var $__responseTypeSet = null;
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/**
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* Holds the copy of Controller::$params
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*
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* @var array
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* @access public
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*/
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var $params = array();
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/**
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* Friendly content-type mappings used to set response types and determine
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* request types. Can be modified with RequestHandler::setContent()
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*
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* @var array
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* @access private
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* @see RequestHandlerComponent::setContent
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*/
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var $__requestContent = array(
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'javascript' => 'text/javascript',
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'js' => 'text/javascript',
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'json' => 'application/json',
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'css' => 'text/css',
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'html' => array('text/html', '*/*'),
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'text' => 'text/plain',
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'txt' => 'text/plain',
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'csv' => array('application/vnd.ms-excel', 'text/plain'),
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'form' => 'application/x-www-form-urlencoded',
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'file' => 'multipart/form-data',
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'xhtml' => array('application/xhtml+xml', 'application/xhtml', 'text/xhtml'),
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'xhtml-mobile' => 'application/vnd.wap.xhtml+xml',
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'xml' => array('application/xml', 'text/xml'),
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'rss' => 'application/rss+xml',
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'atom' => 'application/atom+xml',
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'amf' => 'application/x-amf',
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'wap' => array(
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'text/vnd.wap.wml',
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'text/vnd.wap.wmlscript',
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'image/vnd.wap.wbmp'
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),
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'wml' => 'text/vnd.wap.wml',
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'wmlscript' => 'text/vnd.wap.wmlscript',
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'wbmp' => 'image/vnd.wap.wbmp',
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'pdf' => 'application/pdf',
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'zip' => 'application/x-zip',
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'tar' => 'application/x-tar'
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);
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/**
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* List of regular expressions for matching mobile device's user agent string
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*
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* @var array
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* @access public
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*/
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var $mobileUA = array(
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'Android',
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'AvantGo',
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'BlackBerry',
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'DoCoMo',
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'iPod',
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'iPhone',
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'J2ME',
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'MIDP',
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'NetFront',
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'Nokia',
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'Opera Mini',
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'PalmOS',
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'PalmSource',
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'portalmmm',
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'Plucker',
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'ReqwirelessWeb',
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'SonyEricsson',
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'Symbian',
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'UP\.Browser',
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'webOS',
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'Windows CE',
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'Xiino'
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);
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/**
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* Content-types accepted by the client. If extension parsing is enabled in the
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* Router, and an extension is detected, the corresponding content-type will be
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* used as the overriding primary content-type accepted.
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*
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* @var array
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* @access private
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* @see Router::parseExtensions()
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*/
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var $__acceptTypes = array();
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/**
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* The template to use when rendering the given content type.
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*
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* @var string
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* @access private
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*/
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var $__renderType = null;
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/**
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* Contains the file extension parsed out by the Router
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*
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* @var string
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* @access public
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* @see Router::parseExtensions()
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*/
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var $ext = null;
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/**
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* Flag set when MIME types have been initialized
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*
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* @var boolean
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* @access private
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* @see RequestHandler::__initializeTypes()
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*/
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var $__typesInitialized = false;
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/**
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* Constructor. Parses the accepted content types accepted by the client using HTTP_ACCEPT
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*
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*/
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function __construct() {
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$this->__acceptTypes = explode(',', env('HTTP_ACCEPT'));
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foreach ($this->__acceptTypes as $i => $type) {
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if (strpos($type, ';')) {
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$type = explode(';', $type);
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$this->__acceptTypes[$i] = $type[0];
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}
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}
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parent::__construct();
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}
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/**
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* Initializes the component, gets a reference to Controller::$parameters, and
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* checks to see if a file extension has been parsed by the Router. If yes, the
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* corresponding content-type is pushed onto the list of accepted content-types
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* as the first item.
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*
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* @param object $controller A reference to the controller
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* @param array $settings Array of settings to _set().
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* @return void
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* @see Router::parseExtensions()
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* @access public
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*/
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function initialize(&$controller, $settings = array()) {
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if (isset($controller->params['url']['ext'])) {
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$this->ext = $controller->params['url']['ext'];
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}
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$this->_set($settings);
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}
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/**
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* The startup method of the RequestHandler enables several automatic behaviors
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* related to the detection of certain properties of the HTTP request, including:
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*
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* - Disabling layout rendering for Ajax requests (based on the HTTP_X_REQUESTED_WITH header)
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* - If Router::parseExtensions() is enabled, the layout and template type are
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* switched based on the parsed extension. For example, if controller/action.xml
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* is requested, the view path becomes <i>app/views/controller/xml/action.ctp</i>.
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* - If a helper with the same name as the extension exists, it is added to the controller.
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* - If the extension is of a type that RequestHandler understands, it will set that
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* Content-type in the response header.
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* - If the XML data is POSTed, the data is parsed into an XML object, which is assigned
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* to the $data property of the controller, which can then be saved to a model object.
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*
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* @param object $controller A reference to the controller
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* @return void
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* @access public
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*/
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function startup(&$controller) {
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if (!$this->enabled) {
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return;
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}
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$this->__initializeTypes();
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$controller->params['isAjax'] = $this->isAjax();
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$isRecognized = (
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!in_array($this->ext, array('html', 'htm')) &&
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in_array($this->ext, array_keys($this->__requestContent))
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);
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if (!empty($this->ext) && $isRecognized) {
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$this->renderAs($controller, $this->ext);
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} elseif ($this->isAjax()) {
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$this->renderAs($controller, 'ajax');
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} elseif (empty($this->ext) || in_array($this->ext, array('html', 'htm'))) {
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$this->respondAs('html', array('charset' => Configure::read('App.encoding')));
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}
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if ($this->requestedWith('xml')) {
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if (!class_exists('XmlNode')) {
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App::import('Core', 'Xml');
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}
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$xml = new Xml(trim(file_get_contents('php://input')));
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if (count($xml->children) == 1 && is_object($dataNode = $xml->child('data'))) {
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$controller->data = $dataNode->toArray();
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} else {
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$controller->data = $xml->toArray();
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}
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}
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}
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/**
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* Handles (fakes) redirects for Ajax requests using requestAction()
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*
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* @param object $controller A reference to the controller
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* @param mixed $url A string or array containing the redirect location
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* @param mixed HTTP Status for redirect
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* @access public
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*/
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function beforeRedirect(&$controller, $url, $status = null) {
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if (!$this->isAjax()) {
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return;
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}
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foreach ($_POST as $key => $val) {
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unset($_POST[$key]);
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}
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if (is_array($url)) {
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$url = Router::url($url + array('base' => false));
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}
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if (!empty($status)) {
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$statusCode = $controller->httpCodes($status);
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$code = key($statusCode);
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$msg = $statusCode[$code];
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$controller->header("HTTP/1.1 {$code} {$msg}");
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}
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echo $this->requestAction($url, array('return', 'bare' => false));
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$this->_stop();
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}
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/**
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* Returns true if the current HTTP request is Ajax, false otherwise
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*
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* @return boolean True if call is Ajax
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* @access public
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*/
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function isAjax() {
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return env('HTTP_X_REQUESTED_WITH') === "XMLHttpRequest";
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}
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/**
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* Returns true if the current HTTP request is coming from a Flash-based client
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*
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* @return boolean True if call is from Flash
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* @access public
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*/
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function isFlash() {
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return (preg_match('/^(Shockwave|Adobe) Flash/', env('HTTP_USER_AGENT')) == 1);
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}
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/**
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* Returns true if the current request is over HTTPS, false otherwise.
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*
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* @return bool True if call is over HTTPS
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* @access public
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*/
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function isSSL() {
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return env('HTTPS');
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}
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/**
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* Returns true if the current call accepts an XML response, false otherwise
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*
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* @return boolean True if client accepts an XML response
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* @access public
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*/
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function isXml() {
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return $this->prefers('xml');
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}
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/**
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* Returns true if the current call accepts an RSS response, false otherwise
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*
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* @return boolean True if client accepts an RSS response
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* @access public
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*/
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function isRss() {
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return $this->prefers('rss');
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}
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/**
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* Returns true if the current call accepts an Atom response, false otherwise
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*
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* @return boolean True if client accepts an RSS response
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* @access public
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*/
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function isAtom() {
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return $this->prefers('atom');
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}
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/**
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* Returns true if user agent string matches a mobile web browser, or if the
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* client accepts WAP content.
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*
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* @return boolean True if user agent is a mobile web browser
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* @access public
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* @deprecated Use of constant REQUEST_MOBILE_UA is deprecated and will be removed in future versions
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*/
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function isMobile() {
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if (defined('REQUEST_MOBILE_UA')) {
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$regex = '/' . REQUEST_MOBILE_UA . '/i';
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} else {
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$regex = '/' . implode('|', $this->mobileUA) . '/i';
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}
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if (preg_match($regex, env('HTTP_USER_AGENT')) || $this->accepts('wap')) {
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return true;
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}
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return false;
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}
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/**
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* Returns true if the client accepts WAP content
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*
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* @return bool
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* @access public
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*/
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function isWap() {
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return $this->prefers('wap');
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}
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/**
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* Returns true if the current call a POST request
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*
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* @return boolean True if call is a POST
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* @access public
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*/
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function isPost() {
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return (strtolower(env('REQUEST_METHOD')) == 'post');
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}
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/**
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* Returns true if the current call a PUT request
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*
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* @return boolean True if call is a PUT
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* @access public
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*/
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function isPut() {
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return (strtolower(env('REQUEST_METHOD')) == 'put');
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}
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/**
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* Returns true if the current call a GET request
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*
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* @return boolean True if call is a GET
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* @access public
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*/
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function isGet() {
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return (strtolower(env('REQUEST_METHOD')) == 'get');
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}
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/**
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* Returns true if the current call a DELETE request
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*
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* @return boolean True if call is a DELETE
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* @access public
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*/
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function isDelete() {
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return (strtolower(env('REQUEST_METHOD')) == 'delete');
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}
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/**
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* Gets Prototype version if call is Ajax, otherwise empty string.
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* The Prototype library sets a special "Prototype version" HTTP header.
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*
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* @return string Prototype version of component making Ajax call
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* @access public
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*/
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function getAjaxVersion() {
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if (env('HTTP_X_PROTOTYPE_VERSION') != null) {
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return env('HTTP_X_PROTOTYPE_VERSION');
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}
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return false;
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}
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/**
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* Adds/sets the Content-type(s) for the given name. This method allows
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* content-types to be mapped to friendly aliases (or extensions), which allows
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* RequestHandler to automatically respond to requests of that type in the
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* startup method.
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*
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* @param string $name The name of the Content-type, i.e. "html", "xml", "css"
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* @param mixed $type The Content-type or array of Content-types assigned to the name,
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* i.e. "text/html", or "application/xml"
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* @return void
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* @access public
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*/
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function setContent($name, $type = null) {
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if (is_array($name)) {
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$this->__requestContent = array_merge($this->__requestContent, $name);
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return;
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}
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$this->__requestContent[$name] = $type;
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}
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/**
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* Gets the server name from which this request was referred
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*
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* @return string Server address
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* @access public
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*/
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function getReferer() {
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if (env('HTTP_HOST') != null) {
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$sessHost = env('HTTP_HOST');
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}
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if (env('HTTP_X_FORWARDED_HOST') != null) {
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$sessHost = env('HTTP_X_FORWARDED_HOST');
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}
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return trim(preg_replace('/(?:\:.*)/', '', $sessHost));
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}
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/**
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* Gets remote client IP
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*
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* @return string Client IP address
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* @access public
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*/
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function getClientIP($safe = true) {
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if (!$safe && env('HTTP_X_FORWARDED_FOR') != null) {
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$ipaddr = preg_replace('/(?:,.*)/', '', env('HTTP_X_FORWARDED_FOR'));
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} else {
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if (env('HTTP_CLIENT_IP') != null) {
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$ipaddr = env('HTTP_CLIENT_IP');
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} else {
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$ipaddr = env('REMOTE_ADDR');
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}
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}
|
|
|
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if (env('HTTP_CLIENTADDRESS') != null) {
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$tmpipaddr = env('HTTP_CLIENTADDRESS');
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|
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if (!empty($tmpipaddr)) {
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$ipaddr = preg_replace('/(?:,.*)/', '', $tmpipaddr);
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}
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}
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return trim($ipaddr);
|
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}
|
|
|
|
/**
|
|
* Determines which content types the client accepts. Acceptance is based on
|
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* the file extension parsed by the Router (if present), and by the HTTP_ACCEPT
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|
* header.
|
|
*
|
|
* @param mixed $type Can be null (or no parameter), a string type name, or an
|
|
* array of types
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|
* @return mixed If null or no parameter is passed, returns an array of content
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* types the client accepts. If a string is passed, returns true
|
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* if the client accepts it. If an array is passed, returns true
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* if the client accepts one or more elements in the array.
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* @access public
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* @see RequestHandlerComponent::setContent()
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*/
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function accepts($type = null) {
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$this->__initializeTypes();
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if ($type == null) {
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return $this->mapType($this->__acceptTypes);
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} elseif (is_array($type)) {
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foreach ($type as $t) {
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if ($this->accepts($t) == true) {
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return true;
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}
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}
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return false;
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} elseif (is_string($type)) {
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|
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if (!isset($this->__requestContent[$type])) {
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return false;
|
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}
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|
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$content = $this->__requestContent[$type];
|
|
|
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if (is_array($content)) {
|
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foreach ($content as $c) {
|
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if (in_array($c, $this->__acceptTypes)) {
|
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return true;
|
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}
|
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}
|
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} else {
|
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if (in_array($content, $this->__acceptTypes)) {
|
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return true;
|
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}
|
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}
|
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}
|
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}
|
|
|
|
/**
|
|
* Determines the content type of the data the client has sent (i.e. in a POST request)
|
|
*
|
|
* @param mixed $type Can be null (or no parameter), a string type name, or an array of types
|
|
* @return mixed
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* @access public
|
|
*/
|
|
function requestedWith($type = null) {
|
|
if (!$this->isPost() && !$this->isPut()) {
|
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return null;
|
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}
|
|
|
|
list($contentType) = explode(';', env('CONTENT_TYPE'));
|
|
if ($type == null) {
|
|
return $this->mapType($contentType);
|
|
} elseif (is_array($type)) {
|
|
foreach ($type as $t) {
|
|
if ($this->requestedWith($t)) {
|
|
return $this->mapType($t);
|
|
}
|
|
}
|
|
return false;
|
|
} elseif (is_string($type)) {
|
|
return ($type == $this->mapType($contentType));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Determines which content-types the client prefers. If no parameters are given,
|
|
* the content-type that the client most likely prefers is returned. If $type is
|
|
* an array, the first item in the array that the client accepts is returned.
|
|
* Preference is determined primarily by the file extension parsed by the Router
|
|
* if provided, and secondarily by the list of content-types provided in
|
|
* HTTP_ACCEPT.
|
|
*
|
|
* @param mixed $type An optional array of 'friendly' content-type names, i.e.
|
|
* 'html', 'xml', 'js', etc.
|
|
* @return mixed If $type is null or not provided, the first content-type in the
|
|
* list, based on preference, is returned.
|
|
* @access public
|
|
* @see RequestHandlerComponent::setContent()
|
|
*/
|
|
function prefers($type = null) {
|
|
$this->__initializeTypes();
|
|
$accept = $this->accepts();
|
|
|
|
if ($type == null) {
|
|
if (empty($this->ext)) {
|
|
if (is_array($accept)) {
|
|
return $accept[0];
|
|
}
|
|
return $accept;
|
|
}
|
|
return $this->ext;
|
|
}
|
|
|
|
$types = $type;
|
|
if (is_string($type)) {
|
|
$types = array($type);
|
|
}
|
|
|
|
if (count($types) === 1) {
|
|
if (!empty($this->ext)) {
|
|
return ($types[0] == $this->ext);
|
|
}
|
|
return ($types[0] == $accept[0]);
|
|
}
|
|
$accepts = array();
|
|
|
|
foreach ($types as $type) {
|
|
if (in_array($type, $accept)) {
|
|
$accepts[] = $type;
|
|
}
|
|
}
|
|
|
|
if (count($accepts) === 0) {
|
|
return false;
|
|
} elseif (count($types) === 1) {
|
|
return ($types[0] === $accepts[0]);
|
|
} elseif (count($accepts) === 1) {
|
|
return $accepts[0];
|
|
}
|
|
|
|
$acceptedTypes = array();
|
|
foreach ($this->__acceptTypes as $type) {
|
|
$acceptedTypes[] = $this->mapType($type);
|
|
}
|
|
$accepts = array_intersect($acceptedTypes, $accepts);
|
|
return $accepts[0];
|
|
}
|
|
|
|
/**
|
|
* Sets the layout and template paths for the content type defined by $type.
|
|
*
|
|
* @param object $controller A reference to a controller object
|
|
* @param string $type Type of response to send (e.g: 'ajax')
|
|
* @return void
|
|
* @access public
|
|
* @see RequestHandlerComponent::setContent()
|
|
* @see RequestHandlerComponent::respondAs()
|
|
*/
|
|
function renderAs(&$controller, $type) {
|
|
$this->__initializeTypes();
|
|
$options = array('charset' => 'UTF-8');
|
|
|
|
if (Configure::read('App.encoding') !== null) {
|
|
$options = array('charset' => Configure::read('App.encoding'));
|
|
}
|
|
|
|
if ($type == 'ajax') {
|
|
$controller->layout = $this->ajaxLayout;
|
|
return $this->respondAs('html', $options);
|
|
}
|
|
$controller->ext = '.ctp';
|
|
|
|
if (empty($this->__renderType)) {
|
|
$controller->viewPath .= DS . $type;
|
|
} else {
|
|
$remove = preg_replace("/([\/\\\\]{$this->__renderType})$/", DS . $type, $controller->viewPath);
|
|
$controller->viewPath = $remove;
|
|
}
|
|
$this->__renderType = $type;
|
|
$controller->layoutPath = $type;
|
|
|
|
if (isset($this->__requestContent[$type])) {
|
|
$this->respondAs($type, $options);
|
|
}
|
|
|
|
$helper = ucfirst($type);
|
|
$isAdded = (
|
|
in_array($helper, $controller->helpers) ||
|
|
array_key_exists($helper, $controller->helpers)
|
|
);
|
|
|
|
if (!$isAdded) {
|
|
if (App::import('Helper', $helper)) {
|
|
$controller->helpers[] = $helper;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the response header based on type map index name. If DEBUG is greater than 2, the header
|
|
* is not set.
|
|
*
|
|
* @param mixed $type Friendly type name, i.e. 'html' or 'xml', or a full content-type,
|
|
* like 'application/x-shockwave'.
|
|
* @param array $options If $type is a friendly type name that is associated with
|
|
* more than one type of content, $index is used to select which content-type to use.
|
|
* @return boolean Returns false if the friendly type name given in $type does
|
|
* not exist in the type map, or if the Content-type header has
|
|
* already been set by this method.
|
|
* @access public
|
|
* @see RequestHandlerComponent::setContent()
|
|
*/
|
|
function respondAs($type, $options = array()) {
|
|
$this->__initializeTypes();
|
|
if (!array_key_exists($type, $this->__requestContent) && strpos($type, '/') === false) {
|
|
return false;
|
|
}
|
|
$defaults = array('index' => 0, 'charset' => null, 'attachment' => false);
|
|
$options = array_merge($defaults, $options);
|
|
|
|
if (strpos($type, '/') === false && isset($this->__requestContent[$type])) {
|
|
$cType = null;
|
|
if (is_array($this->__requestContent[$type]) && isset($this->__requestContent[$type][$options['index']])) {
|
|
$cType = $this->__requestContent[$type][$options['index']];
|
|
} elseif (is_array($this->__requestContent[$type]) && isset($this->__requestContent[$type][0])) {
|
|
$cType = $this->__requestContent[$type][0];
|
|
} elseif (isset($this->__requestContent[$type])) {
|
|
$cType = $this->__requestContent[$type];
|
|
} else {
|
|
return false;
|
|
}
|
|
|
|
if (is_array($cType)) {
|
|
if ($this->prefers($cType)) {
|
|
$cType = $this->prefers($cType);
|
|
} else {
|
|
$cType = $cType[0];
|
|
}
|
|
}
|
|
} else {
|
|
$cType = $type;
|
|
}
|
|
|
|
if ($cType != null) {
|
|
$header = 'Content-type: ' . $cType;
|
|
|
|
if (!empty($options['charset'])) {
|
|
$header .= '; charset=' . $options['charset'];
|
|
}
|
|
if (!empty($options['attachment'])) {
|
|
$this->_header("Content-Disposition: attachment; filename=\"{$options['attachment']}\"");
|
|
}
|
|
if (Configure::read() < 2 && !defined('CAKEPHP_SHELL')) {
|
|
$this->_header($header);
|
|
}
|
|
$this->__responseTypeSet = $cType;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Wrapper for header() so calls can be easily tested.
|
|
*
|
|
* @param string $header The header to be sent.
|
|
* @return void
|
|
* @access protected
|
|
*/
|
|
function _header($header) {
|
|
header($header);
|
|
}
|
|
|
|
/**
|
|
* Returns the current response type (Content-type header), or null if none has been set
|
|
*
|
|
* @return mixed A string content type alias, or raw content type if no alias map exists,
|
|
* otherwise null
|
|
* @access public
|
|
*/
|
|
function responseType() {
|
|
if ($this->__responseTypeSet == null) {
|
|
return null;
|
|
}
|
|
return $this->mapType($this->__responseTypeSet);
|
|
}
|
|
|
|
/**
|
|
* Maps a content-type back to an alias
|
|
*
|
|
* @param mixed $type Content type
|
|
* @return mixed Alias
|
|
* @access public
|
|
*/
|
|
function mapType($ctype) {
|
|
if (is_array($ctype)) {
|
|
$out = array();
|
|
foreach ($ctype as $t) {
|
|
$out[] = $this->mapType($t);
|
|
}
|
|
return $out;
|
|
} else {
|
|
$keys = array_keys($this->__requestContent);
|
|
$count = count($keys);
|
|
|
|
for ($i = 0; $i < $count; $i++) {
|
|
$name = $keys[$i];
|
|
$type = $this->__requestContent[$name];
|
|
|
|
if (is_array($type) && in_array($ctype, $type)) {
|
|
return $name;
|
|
} elseif (!is_array($type) && $type == $ctype) {
|
|
return $name;
|
|
}
|
|
}
|
|
return $ctype;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Initializes MIME types
|
|
*
|
|
* @return void
|
|
* @access private
|
|
*/
|
|
function __initializeTypes() {
|
|
if ($this->__typesInitialized) {
|
|
return;
|
|
}
|
|
if (isset($this->__requestContent[$this->ext])) {
|
|
$content = $this->__requestContent[$this->ext];
|
|
if (is_array($content)) {
|
|
$content = $content[0];
|
|
}
|
|
array_unshift($this->__acceptTypes, $content);
|
|
}
|
|
$this->__typesInitialized = true;
|
|
}
|
|
}
|