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422 aurelien 1
<?php
2463 jpm 2
// declare(encoding='UTF-8');
3
/**
4
 * Classe principale de gestion des web-services.
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 *
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 * @internal   Mininum PHP version : 5.2
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 * @category   CEL
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 * @package    Services
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 * @subpackage Index
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 * @version    0.1
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 * @author     Mathias CHOUET <mathias@tela-botanica.org>
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 * @author     Jean-Pascal MILCENT <jpm@tela-botanica.org>
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 * @author     Aurelien PERONNET <aurelien@tela-botanica.org>
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 * @license    GPL v3 <http://www.gnu.org/licenses/gpl.txt>
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 * @license    CECILL v2 <http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt>
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 * @copyright  1999-2014 Tela Botanica <accueil@tela-botanica.org>
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 */
422 aurelien 18
class JRest {
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 	/** Parsed configuration file */
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    private $config;
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23
	/** The HTTP request method used. */
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	private $method = 'GET';
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26
	/** 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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32
	/** Nom resource. */
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	private $resource = NULL;
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	/** Identifiant unique resource. */
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	private $uid = NULL;
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38
	/**
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	 * Constructor. Parses the configuration file "JRest.ini", grabs any request data sent, records the HTTP
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	 * request method used and parses the request URL to find out the requested resource
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	 * @param str iniFile Configuration file to use
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	 */
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	public function JRest($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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			}
2463 jpm 59
 
539 jpm 60
			$urlString = '';
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			if  (substr_count($_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 66
 
67
			$urlParts = explode('/', $urlString);
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69
			if (isset($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 $uid) {
73
					if ($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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79
			$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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	}
84
 
85
	/**
86
	 * 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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				$this->add();
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				break;
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		}
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	}
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105
	/**
106
	 * Execute a GET request. A GET request fetches a list of resource when no resource name is given, a list of element
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	 * when a resource name is given, or a resource element when a resource and resource unique identifier are given. It does not change the
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	 * database contents.
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	 */
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	private function get() {
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		if ($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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				}
126
			}
127
		} else { // get resources
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			// include set.jrest.php, instanticiation et appel
129
		}
130
	}
131
 
132
	private function post() {
133
	   	$pairs = array();
134
		// Récupération des paramètres passés dans le contenu de la requête HTTP (= POST)
135
	   	if ($this->requestData) {
136
			$pairs = $this->parseRequestData();
137
		}
138
 
139
		// Ajout des informations concernant l'upload de fichier passées dans la variable $_FILE
140
		if(isset($_FILES)) {
141
			foreach ($_FILES as $v) {
142
				$pairs[$v['name']] = $v;
143
			}
144
 
145
			// Ne pas effacer cette ligne ! Elle est indispensable pour les services du Carnet en ligne
146
			// qui n'utilisent que le tableau pairs dans les posts
1920 aurelien 147
			$pairs = array_merge($_POST, $pairs);
422 aurelien 148
		}
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150
		// gestion du contenu du post
151
		if(isset($_POST))
152
		{
153
			// Safari ne sait pas envoyer des DELETE avec gwt...
154
			// Nous utilisons le parametre "action" passé dans le POST qui doit contenir DELETE pour lancer la supression
1015 aurelien 155
			if (isset($pairs['action']) && $pairs['action'] == 'DELETE') {
422 aurelien 156
				$this->delete();
157
				return;
158
			}
159
 
160
			if (count($pairs) != 0) {
161
				if ($this->uid) { // get a resource element
162
					$resource_file = 'services/'.ucfirst($this->resource).'.php';
163
					$resource_class = ucfirst($this->resource);
164
					if (file_exists($resource_file)) {
165
						include_once $resource_file;
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						if (class_exists($resource_class)) {
167
							$service = new $resource_class($this->config);
168
							if (method_exists($service,'updateElement')) { // Update element
1628 raphael 169
								$ret_value = false;
170
								try {
171
									// TODO : a voir le retour ...
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									$ret_value = $service->updateElement($this->uid, $pairs);
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									if($ret_value) $this->created();
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									else $this->badRequest();
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								} catch (Exception $e) {
176
									$this->badRequest($e);
422 aurelien 177
								}
178
							}
179
						}
180
					}
181
				} else { // get all elements of a ressource
182
					$this->add($pairs);
183
				}
184
			} else {
185
				$this->lengthRequired();
186
			}
187
		}
188
	}
189
 
190
	private function delete() {
191
		$resource_file = 'services/'.ucfirst($this->resource).'.php';
192
		$resource_class = ucfirst($this->resource);
193
		if (file_exists($resource_file)) {
194
			include_once $resource_file;
195
			if (class_exists($resource_class)) {
196
				$service = new $resource_class($this->config);
197
				if ($this->uid) { // get a resource element
198
		 			if (method_exists($service, 'deleteElement')) { // Delete element
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						if ($service->deleteElement($this->uid)) {
200
							$this->noContent();
201
						}
202
	 				}
203
				}
204
			}
205
		}
206
	}
207
 
208
	private function add($pairs = null) {
209
		if (is_null($pairs)) {
210
			$pairs = array();
211
			// Récupération des paramètres passés dans le contenu de la requête HTTP (= POST)
212
			// FIXME : vérifier que l'on récupère bien les données passées par PUT
213
		   	if ($this->requestData) {
214
				$pairs = $this->parseRequestData();
215
			}
216
		}
217
 
218
		if (count($pairs) != 0) {
219
			$resource_file = 'services/'.ucfirst($this->resource).'.php';
220
			$resource_class = ucfirst($this->resource);
221
			if (file_exists($resource_file)) {
222
				include_once $resource_file;
223
				if (class_exists($resource_class)) {
224
					$service = new $resource_class($this->config);
225
					if (method_exists($service,'createElement')) { // Create a new element
1628 raphael 226
						$ret_value = false;
227
						try {
228
							$ret_value = $service->createElement($pairs);
229
							if($ret_value) $this->created();
230
							else $this->badRequest();
231
						} catch (Exception $e) {
232
							$this->badRequest($e);
422 aurelien 233
						}
234
					}
235
				}
236
			}
237
		} else {
238
			$this->lengthRequired();
239
		}
240
	}
241
 
242
	/**
243
	 * Parse the HTTP request data.
244
	 * @return str[] Array of name value pairs
245
	 */
246
	private function parseRequestData() {
247
		$values = array();
248
		$pairs = explode('&', $this->requestData);
249
		foreach ($pairs as $pair) {
250
			$parts = explode('=', $pair);
251
			if (isset($parts[0]) && isset($parts[1])) {
252
				$parts[1] = rtrim(urldecode($parts[1]));
253
				$values[$parts[0]] = $parts[1];
254
			}
255
		}
256
		return $values;
257
	}
258
 
259
	/**
260
	 * Send a HTTP 201 response header.
261
	 */
262
	private function created($url = FALSE) {
263
		header('HTTP/1.0 201 Created');
264
		if ($url) {
265
			header('Location: '.$url);
266
		}
267
	}
268
 
269
	/**
270
	 * Send a HTTP 204 response header.
271
	 */
272
	private function noContent() {
273
		header('HTTP/1.0 204 No Content');
274
	}
275
 
276
	/**
277
	 * Send a HTTP 400 response header.
278
	 */
1628 raphael 279
	private function badRequest(Exception $e = NULL) {
422 aurelien 280
		header('HTTP/1.0 400 Bad Request');
1628 raphael 281
		if($e) echo $e->getMessage();
422 aurelien 282
	}
283
 
284
	/**
285
	 * Send a HTTP 401 response header.
286
	 */
287
	private function unauthorized($realm = 'JRest') {
288
		if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW'])) {
289
			header('WWW-Authenticate: Basic realm="'.$realm.'"');
290
		}
291
		header('HTTP/1.0 401 Unauthorized');
292
	}
293
 
294
	/**
295
	 * Send a HTTP 404 response header.
296
	 */
297
	private function notFound() {
298
		header('HTTP/1.0 404 Not Found');
299
	}
300
 
301
	/**
302
	 * Send a HTTP 405 response header.
303
	 */
304
	private function methodNotAllowed($allowed = 'GET, HEAD') {
305
		header('HTTP/1.0 405 Method Not Allowed');
306
		header('Allow: '.$allowed);
307
	}
308
 
309
	/**
310
	 * Send a HTTP 406 response header.
311
	 */
312
	private function notAcceptable() {
313
		header('HTTP/1.0 406 Not Acceptable');
314
		echo join(', ', array_keys($this->config['renderers']));
315
	}
316
 
317
	/**
318
	 * Send a HTTP 411 response header.
319
	 */
320
	private function lengthRequired() {
321
		header('HTTP/1.0 411 Length Required');
322
	}
323
 
324
	/**
325
	 * Send a HTTP 500 response header.
326
	 */
327
	private function internalServerError() {
328
		header('HTTP/1.0 500 Internal Server Error');
329
	}
330
}
331
?>