3 * A concrete and secured HTTP request class to make HTTP requests more abstract
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, this is free software
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.ship-simu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 class HttpRequest extends BaseFrameworkSystem implements Requestable {
26 * Array for the request data
28 private $requestData = array();
31 * Wether this request is valid and can be further processed. The default is
32 * valid so make sure your intercepting filters sets this attribute to false
33 * when they need to intercept the data flow.
35 private $requestIsValid = true;
38 * Protected constructor
42 protected function __construct () {
43 // Call parent constructor
44 parent::__construct(__CLASS__);
47 $this->removeNumberFormaters();
48 $this->removeSystemArray();
52 * Creates an instance of this class and prepares it a little
54 * @return $httpInstance An instance of this class
56 public final static function createHttpRequest () {
58 $httpInstance = new HttpRequest();
60 // Prepare the HTTP request data for usage
61 $httpInstance->prepareRequestData();
63 // Return the prepared instance
68 * Prepares the HTTP request data for usage by currently copying
69 * $_REQUEST into a private attribute. Later on we can add more
70 * things for initialization here.
74 public function prepareRequestData () {
75 // Copy GET then POST data
76 $this->requestData = array_merge($_GET, $_POST);
80 * Checks wether a request element is set
81 * @param $element Name of the request element we want to check
82 * @return $isSet Wether the request element is set
84 public function isRequestElementSet ($element) {
85 // Is this element found?
86 if (!isset($this->requestData[$element])) {
96 * Getter for request element or 'null' if the element was not found
98 * @param $element Name of the request element we want to check
99 * @return $value Value of the found request element or 'null' if the
100 * element was not found
102 public function getRequestElement ($element) {
106 // Is the element set?
107 if ($this->isRequestElementSet($element)) {
108 // Get the bare value
109 $value = $this->requestData[$element];
111 // Secure it against attacks
112 $value = htmlentities(strip_tags($value), ENT_QUOTES);
115 // Return the element's value
120 * Setter for request elements
122 * @param $element Request element to se
123 * @param $value Value to set
126 public function setRequestElement ($element, $value) {
127 error_log(__METHOD__.":{$element}={$value}");
128 $this->requestData[$element] = $value;
132 * Wrapper method for array_key() function for the request data array
134 * @return $array An array containing all array keys to return
136 public function getParameterNames () {
137 return array_keys($this->requestData);
141 * Getter for a header element or 'null' if the header was not found
143 * @param $headerName Name of the header
144 * @return $headerValue Value of the header or 'null' if not found
146 public function getHeader ($headerName) {
147 // Default return value on error
150 // Construct the name
151 $name = 'HTTP_' . strtolower(str_replace('-', '_', $headerName));
153 // Does this header exist?
154 if (isset($_SERVER[$name])) {
155 $headerValue = $_SERVER[$name];
163 * Getter for request method. This getter might be useful for security filters
165 * @return $requestMethod Used request method
167 public final function getRequestMethod () {
168 return $_SERVER['REQUEST_METHOD'];
172 * Sets wether the request was valid (default: true)
174 * @param $isValid Wether the request is valid
177 public final function requestIsValid ($isValid = true) {
178 $this->requestIsValid = (bool) $isValid;
182 * Returns wether this request is valid
184 * @return $requestIsValid Wether this request is valid
186 public final function isRequestValid () {
187 return $this->requestIsValid;
191 * Reads a cookie and returns it's value or null if not found
193 * @param $cookieName Name of cookie we shall read
194 * @return $cookieValue Value of cookie or null if not found
196 public final function readCookie ($cookieName) {
197 // Default is no cookie with that name found
200 // Is the cookie set?
201 if (isset($_COOKIE[$cookieName])) {
203 $cookieValue = $_COOKIE[$cookieName];