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453 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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			}
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			$urlString = substr($_SERVER['REQUEST_URI'], strlen($this->config['settings']['baseURL']), $len);
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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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121
		// Ajout des informations concernant l'upload de fichier passées dans la variable $_FILE
122
		if(isset($_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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			// Ne pas effacer cette ligne ! Elle est indispensable pour les services du Carnet en ligne
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			// qui n'utilisent que le tableau pairs dans les posts
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			$pairs = array_merge($pairs, $_POST);
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		}
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		// gestion du contenu du post
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		if(isset($_POST))
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		{
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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
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			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)) {
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									$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);
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				}
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			} else {
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				$this->lengthRequired();
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			}
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		}
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	}
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	private function delete() {
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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, 'deleteElement')) { // Delete element
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						if ($service->deleteElement($this->uid)) {
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							$this->noContent();
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						}
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	 				}
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				}
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			}
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		}
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	}
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	private function add($pairs = null) {
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		if (is_null($pairs)) {
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			$pairs = array();
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			// Récupération des paramètres passés dans le contenu de la requête HTTP (= POST)
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			// FIXME : vérifier que l'on récupère bien les données passées par PUT
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		   	if ($this->requestData) {
191
				$pairs = $this->parseRequestData();
192
			}
193
		}
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195
		if (count($pairs) != 0) {
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			$resource_file = 'services/'.ucfirst($this->resource).'.php';
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			$resource_class = ucfirst($this->resource);
198
			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();
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						}
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					}
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				}
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			}
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		} else {
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			$this->lengthRequired();
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		}
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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
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	 */
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	private function parseRequestData() {
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		$values = array();
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		$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]));
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				$values[$parts[0]] = $parts[1];
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			}
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		}
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		return $values;
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	}
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	/**
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	 * Send a HTTP 201 response header.
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	 */
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	private function created($url = FALSE) {
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		header('HTTP/1.0 201 Created');
236
		if ($url) {
237
			header('Location: '.$url);
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		}
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	}
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241
	/**
242
	 * Send a HTTP 204 response header.
243
	 */
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	private function noContent() {
245
		header('HTTP/1.0 204 No Content');
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	}
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	/**
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	 * Send a HTTP 400 response header.
250
	 */
251
	private function badRequest() {
252
		header('HTTP/1.0 400 Bad Request');
253
	}
254
 
255
	/**
256
	 * Send a HTTP 401 response header.
257
	 */
258
	private function unauthorized($realm = 'JRest') {
259
		if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW'])) {
260
			header('WWW-Authenticate: Basic realm="'.$realm.'"');
261
		}
262
		header('HTTP/1.0 401 Unauthorized');
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	}
264
 
265
	/**
266
	 * Send a HTTP 404 response header.
267
	 */
268
	private function notFound() {
269
		header('HTTP/1.0 404 Not Found');
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	}
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	/**
273
	 * Send a HTTP 405 response header.
274
	 */
275
	private function methodNotAllowed($allowed = 'GET, HEAD') {
276
		header('HTTP/1.0 405 Method Not Allowed');
277
		header('Allow: '.$allowed);
278
	}
279
 
280
	/**
281
	 * Send a HTTP 406 response header.
282
	 */
283
	private function notAcceptable() {
284
		header('HTTP/1.0 406 Not Acceptable');
285
		echo join(', ', array_keys($this->config['renderers']));
286
	}
287
 
288
	/**
289
	 * Send a HTTP 411 response header.
290
	 */
291
	private function lengthRequired() {
292
		header('HTTP/1.0 411 Length Required');
293
	}
294
 
295
	/**
296
	 * Send a HTTP 500 response header.
297
	 */
298
	private function internalServerError() {
299
		header('HTTP/1.0 500 Internal Server Error');
300
	}
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}
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?>