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<?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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if(!isset($_SESSION)) {
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session_start();
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}
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$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 = '';
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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']), $len);
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}
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$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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// Ajout des informations concernant l'upload de fichier passées dans la variable $_FILE
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if(isset($_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 (isset($pairs['action']) && $pairs['action'] == 'DELETE') {
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$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 ($this->requestData) {
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$pairs = $this->parseRequestData();
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}
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}
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if (count($pairs) != 0) {
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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($service,'createElement')) { // Create a new element
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if ($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');
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if ($url) {
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header('Location: '.$url);
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}
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}
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/**
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* Send a HTTP 204 response header.
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*/
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private function noContent() {
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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.
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*/
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private function badRequest() {
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header('HTTP/1.0 400 Bad Request');
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}
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/**
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* Send a HTTP 401 response header.
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*/
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private function unauthorized($realm = 'JRest') {
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if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW'])) {
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header('WWW-Authenticate: Basic realm="'.$realm.'"');
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}
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header('HTTP/1.0 401 Unauthorized');
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}
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/**
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* Send a HTTP 404 response header.
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*/
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private function notFound() {
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header('HTTP/1.0 404 Not Found');
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}
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/**
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* Send a HTTP 405 response header.
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*/
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private function methodNotAllowed($allowed = 'GET, HEAD') {
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header('HTTP/1.0 405 Method Not Allowed');
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header('Allow: '.$allowed);
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}
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/**
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* Send a HTTP 406 response header.
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*/
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private function notAcceptable() {
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header('HTTP/1.0 406 Not Acceptable');
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echo join(', ', array_keys($this->config['renderers']));
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}
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/**
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* Send a HTTP 411 response header.
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*/
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private function lengthRequired() {
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header('HTTP/1.0 411 Length Required');
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}
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/**
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* Send a HTTP 500 response header.
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*/
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private function internalServerError() {
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header('HTTP/1.0 500 Internal Server Error');
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}
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}
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?>
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