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422 aurelien 1
<?php
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// In : utf8 url_encoded (get et post)
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// Out : utf8
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// TODO : gerer les retours : dans ce controleur : code retour et envoi ...
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class JRest {
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 	/** Parsed configuration file */
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    private $config;
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	/** The HTTP request method used. */
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	private $method = 'GET';
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	/** The HTTP request data sent (if any). */
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	private $requestData = NULL;
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	/** Array of strings to convert into the HTTP response. */
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	private $output = array();
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	/** Nom resource. */
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	private $resource = NULL;
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	/** Identifiant unique resource. */
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	private $uid = NULL;
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	/**
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	 * Constructor. Parses the configuration file "JRest.ini", grabs any request data sent, records the HTTP
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	 * request method used and parses the request URL to find out the requested resource
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	 * @param str iniFile Configuration file to use
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	 */
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	public function JRest($iniFile = 'jrest.ini.php') {
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		$this->config = parse_ini_file($iniFile, TRUE);
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		if (isset($_SERVER['REQUEST_URI']) && isset($_SERVER['REQUEST_METHOD']) && isset($_SERVER['QUERY_STRING'])) {
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			if (isset($_SERVER['CONTENT_LENGTH']) && $_SERVER['CONTENT_LENGTH'] > 0) {
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				$this->requestData = '';
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				$httpContent = fopen('php://input', 'r');
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				while ($data = fread($httpContent, 1024)) {
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					$this->requestData .= $data;
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				}
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				fclose($httpContent);
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			}
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			if (strlen($_SERVER['QUERY_STRING']) == 0) {
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				$len = strlen($_SERVER['REQUEST_URI']);
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			} else {
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				$len = -(strlen($_SERVER['QUERY_STRING']) + 1);
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			}
539 jpm 47
 
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			$urlString = '';
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			if  (substr_count($_SERVER['REQUEST_URI'], $this->config['settings']['baseURL']) > 0) {
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				$urlString = substr($_SERVER['REQUEST_URI'], strlen($this->config['settings']['baseURL']), $len);
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			} else if (substr_count($_SERVER['REQUEST_URI'], $this->config['settings']['baseAlternativeURL']) > 0) {
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				$urlString = substr($_SERVER['REQUEST_URI'], strlen($this->config['settings']['baseAlternativeURL']), $len);
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			}
422 aurelien 54
 
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			$urlParts = explode('/', $urlString);
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			if (isset($urlParts[0])) $this->resource = $urlParts[0];
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			if (count($urlParts) > 1 && $urlParts[1] != '') {
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				array_shift($urlParts);
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				foreach ($urlParts as $uid) {
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					if ($uid != '') {
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						$this->uid[] = urldecode($uid);
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					}
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				}
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			}
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			$this->method = $_SERVER['REQUEST_METHOD'];
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		} else {
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			trigger_error('I require the server variables REQUEST_URI, REQUEST_METHOD and QUERY_STRING to work.', E_USER_ERROR);
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		}
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	}
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	/**
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	 * Execute the request.
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	 */
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	function exec() {
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		switch ($this->method) {
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			case 'GET':
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				$this->get();
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				break;
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			case 'POST':
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				$this->post();
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				break;
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			case 'DELETE':
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				$this->delete();
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				break;
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			case 'PUT':
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				$this->add();
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				break;
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		}
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	}
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	/**
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	 * Execute a GET request. A GET request fetches a list of resource when no resource name is given, a list of element
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	 * when a resource name is given, or a resource element when a resource and resource unique identifier are given. It does not change the
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	 * database contents.
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	 */
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	private function get() {
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		if ($this->resource) {
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			$resource_file = 'services/'.ucfirst($this->resource).'.php';
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			$resource_class = ucfirst($this->resource);
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			if (file_exists($resource_file))  {
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				include_once $resource_file;
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				if (class_exists($resource_class)) {
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					$service = new $resource_class($this->config);
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					if ($this->uid) { // get a resource element
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						if (method_exists($service, 'getElement')) {
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							$service->getElement($this->uid);
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						}
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					} elseif (method_exists($service, 'getRessource')) { // get all elements of a ressource
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						$service->getRessource();
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					}
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				}
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			}
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		} else { // get resources
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			// include set.jrest.php, instanticiation et appel
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		}
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	}
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	private function post() {
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	   	$pairs = array();
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		// Récupération des paramètres passés dans le contenu de la requête HTTP (= POST)
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	   	if ($this->requestData) {
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			$pairs = $this->parseRequestData();
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		}
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127
		// Ajout des informations concernant l'upload de fichier passées dans la variable $_FILE
128
		if(isset($_FILES)) {
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			foreach ($_FILES as $v) {
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				$pairs[$v['name']] = $v;
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			}
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133
			// Ne pas effacer cette ligne ! Elle est indispensable pour les services du Carnet en ligne
134
			// qui n'utilisent que le tableau pairs dans les posts
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			$pairs = array_merge($pairs, $_POST);
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		}
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138
		// gestion du contenu du post
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		if(isset($_POST))
140
		{
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			// Safari ne sait pas envoyer des DELETE avec gwt...
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			// Nous utilisons le parametre "action" passé dans le POST qui doit contenir DELETE pour lancer la supression
143
			if ($pairs['action'] == 'DELETE') {
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				$this->delete();
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				return;
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			}
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			if (count($pairs) != 0) {
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				if ($this->uid) { // get a resource element
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					$resource_file = 'services/'.ucfirst($this->resource).'.php';
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					$resource_class = ucfirst($this->resource);
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					if (file_exists($resource_file)) {
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						include_once $resource_file;
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						if (class_exists($resource_class)) {
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							$service = new $resource_class($this->config);
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							if (method_exists($service,'updateElement')) { // Update element
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								// TODO : a voir le retour ...
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								if ($service->updateElement($this->uid, $pairs)) {
159
									$this->created();
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								}
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							}
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						}
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					}
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				} else { // get all elements of a ressource
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					$this->add($pairs);
166
				}
167
			} else {
168
				$this->lengthRequired();
169
			}
170
		}
171
	}
172
 
173
	private function delete() {
174
		$resource_file = 'services/'.ucfirst($this->resource).'.php';
175
		$resource_class = ucfirst($this->resource);
176
		if (file_exists($resource_file)) {
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			include_once $resource_file;
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			if (class_exists($resource_class)) {
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				$service = new $resource_class($this->config);
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				if ($this->uid) { // get a resource element
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		 			if (method_exists($service, 'deleteElement')) { // Delete element
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						if ($service->deleteElement($this->uid)) {
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							$this->noContent();
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						}
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	 				}
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				}
187
			}
188
		}
189
	}
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191
	private function add($pairs = null) {
192
		if (is_null($pairs)) {
193
			$pairs = array();
194
			// Récupération des paramètres passés dans le contenu de la requête HTTP (= POST)
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			// FIXME : vérifier que l'on récupère bien les données passées par PUT
196
		   	if ($this->requestData) {
197
				$pairs = $this->parseRequestData();
198
			}
199
		}
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201
		if (count($pairs) != 0) {
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			$resource_file = 'services/'.ucfirst($this->resource).'.php';
203
			$resource_class = ucfirst($this->resource);
204
			if (file_exists($resource_file)) {
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				include_once $resource_file;
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				if (class_exists($resource_class)) {
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					$service = new $resource_class($this->config);
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					if (method_exists($service,'createElement')) { // Create a new element
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						if ($service->createElement($pairs)) {
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							$this->created();
211
						}
212
					}
213
				}
214
			}
215
		} else {
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			$this->lengthRequired();
217
		}
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	}
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	/**
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	 * Parse the HTTP request data.
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	 * @return str[] Array of name value pairs
223
	 */
224
	private function parseRequestData() {
225
		$values = array();
226
		$pairs = explode('&', $this->requestData);
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		foreach ($pairs as $pair) {
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			$parts = explode('=', $pair);
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			if (isset($parts[0]) && isset($parts[1])) {
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				$parts[1] = rtrim(urldecode($parts[1]));
231
				$values[$parts[0]] = $parts[1];
232
			}
233
		}
234
		return $values;
235
	}
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237
	/**
238
	 * Send a HTTP 201 response header.
239
	 */
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	private function created($url = FALSE) {
241
		header('HTTP/1.0 201 Created');
242
		if ($url) {
243
			header('Location: '.$url);
244
		}
245
	}
246
 
247
	/**
248
	 * Send a HTTP 204 response header.
249
	 */
250
	private function noContent() {
251
		header('HTTP/1.0 204 No Content');
252
	}
253
 
254
	/**
255
	 * Send a HTTP 400 response header.
256
	 */
257
	private function badRequest() {
258
		header('HTTP/1.0 400 Bad Request');
259
	}
260
 
261
	/**
262
	 * Send a HTTP 401 response header.
263
	 */
264
	private function unauthorized($realm = 'JRest') {
265
		if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW'])) {
266
			header('WWW-Authenticate: Basic realm="'.$realm.'"');
267
		}
268
		header('HTTP/1.0 401 Unauthorized');
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	}
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271
	/**
272
	 * Send a HTTP 404 response header.
273
	 */
274
	private function notFound() {
275
		header('HTTP/1.0 404 Not Found');
276
	}
277
 
278
	/**
279
	 * Send a HTTP 405 response header.
280
	 */
281
	private function methodNotAllowed($allowed = 'GET, HEAD') {
282
		header('HTTP/1.0 405 Method Not Allowed');
283
		header('Allow: '.$allowed);
284
	}
285
 
286
	/**
287
	 * Send a HTTP 406 response header.
288
	 */
289
	private function notAcceptable() {
290
		header('HTTP/1.0 406 Not Acceptable');
291
		echo join(', ', array_keys($this->config['renderers']));
292
	}
293
 
294
	/**
295
	 * Send a HTTP 411 response header.
296
	 */
297
	private function lengthRequired() {
298
		header('HTTP/1.0 411 Length Required');
299
	}
300
 
301
	/**
302
	 * Send a HTTP 500 response header.
303
	 */
304
	private function internalServerError() {
305
		header('HTTP/1.0 500 Internal Server Error');
306
	}
307
}
308
?>