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Ignore whitespace Rev 452 → Rev 453

/trunk/jrest/JRest.php/JRest.php
New file
0,0 → 1,302
<?php
// In : utf8 url_encoded (get et post)
// Out : utf8
 
// TODO : gerer les retours : dans ce controleur : code retour et envoi ...
class JRest {
 
/** Parsed configuration file */
private $config;
 
/** The HTTP request method used. */
private $method = 'GET';
 
/** The HTTP request data sent (if any). */
private $requestData = NULL;
 
/** Array of strings to convert into the HTTP response. */
private $output = array();
 
/** Nom resource. */
private $resource = NULL;
 
/** Identifiant unique resource. */
private $uid = NULL;
 
/**
* Constructor. Parses the configuration file "JRest.ini", grabs any request data sent, records the HTTP
* request method used and parses the request URL to find out the requested resource
* @param str iniFile Configuration file to use
*/
public function JRest($iniFile = 'jrest.ini.php') {
$this->config = parse_ini_file($iniFile, TRUE);
if (isset($_SERVER['REQUEST_URI']) && isset($_SERVER['REQUEST_METHOD']) && isset($_SERVER['QUERY_STRING'])) {
if (isset($_SERVER['CONTENT_LENGTH']) && $_SERVER['CONTENT_LENGTH'] > 0) {
$this->requestData = '';
$httpContent = fopen('php://input', 'r');
while ($data = fread($httpContent, 1024)) {
$this->requestData .= $data;
}
fclose($httpContent);
}
if (strlen($_SERVER['QUERY_STRING']) == 0) {
$len = strlen($_SERVER['REQUEST_URI']);
} else {
$len = -(strlen($_SERVER['QUERY_STRING']) + 1);
}
$urlString = substr($_SERVER['REQUEST_URI'], strlen($this->config['settings']['baseURL']), $len);
 
$urlParts = explode('/', $urlString);
 
if (isset($urlParts[0])) $this->resource = $urlParts[0];
if (count($urlParts) > 1 && $urlParts[1] != '') {
array_shift($urlParts);
foreach ($urlParts as $uid) {
if ($uid != '') {
$this->uid[] = urldecode($uid);
}
}
}
 
$this->method = $_SERVER['REQUEST_METHOD'];
} else {
trigger_error('I require the server variables REQUEST_URI, REQUEST_METHOD and QUERY_STRING to work.', E_USER_ERROR);
}
}
 
/**
* Execute the request.
*/
function exec() {
switch ($this->method) {
case 'GET':
$this->get();
break;
case 'POST':
$this->post();
break;
case 'DELETE':
$this->delete();
break;
case 'PUT':
$this->add();
break;
}
}
 
/**
* Execute a GET request. A GET request fetches a list of resource when no resource name is given, a list of element
* when a resource name is given, or a resource element when a resource and resource unique identifier are given. It does not change the
* database contents.
*/
private function get() {
if ($this->resource) {
$resource_file = 'services/'.ucfirst($this->resource).'.php';
$resource_class = ucfirst($this->resource);
if (file_exists($resource_file)) {
include_once $resource_file;
if (class_exists($resource_class)) {
$service = new $resource_class($this->config);
if ($this->uid) { // get a resource element
if (method_exists($service, 'getElement')) {
$service->getElement($this->uid);
}
} elseif (method_exists($service, 'getRessource')) { // get all elements of a ressource
$service->getRessource();
}
}
}
} else { // get resources
// include set.jrest.php, instanticiation et appel
}
}
 
private function post() {
$pairs = array();
// Récupération des paramètres passés dans le contenu de la requête HTTP (= POST)
if ($this->requestData) {
$pairs = $this->parseRequestData();
}
 
// Ajout des informations concernant l'upload de fichier passées dans la variable $_FILE
if(isset($_FILES)) {
foreach ($_FILES as $v) {
$pairs[$v['name']] = $v;
}
 
// Ne pas effacer cette ligne ! Elle est indispensable pour les services du Carnet en ligne
// qui n'utilisent que le tableau pairs dans les posts
$pairs = array_merge($pairs, $_POST);
}
 
// gestion du contenu du post
if(isset($_POST))
{
// Safari ne sait pas envoyer des DELETE avec gwt...
// Nous utilisons le parametre "action" passé dans le POST qui doit contenir DELETE pour lancer la supression
if ($pairs['action'] == 'DELETE') {
$this->delete();
return;
}
 
if (count($pairs) != 0) {
if ($this->uid) { // get a resource element
$resource_file = 'services/'.ucfirst($this->resource).'.php';
$resource_class = ucfirst($this->resource);
if (file_exists($resource_file)) {
include_once $resource_file;
if (class_exists($resource_class)) {
$service = new $resource_class($this->config);
if (method_exists($service,'updateElement')) { // Update element
// TODO : a voir le retour ...
if ($service->updateElement($this->uid, $pairs)) {
$this->created();
}
}
}
}
} else { // get all elements of a ressource
$this->add($pairs);
}
} else {
$this->lengthRequired();
}
}
}
 
private function delete() {
$resource_file = 'services/'.ucfirst($this->resource).'.php';
$resource_class = ucfirst($this->resource);
if (file_exists($resource_file)) {
include_once $resource_file;
if (class_exists($resource_class)) {
$service = new $resource_class($this->config);
if ($this->uid) { // get a resource element
if (method_exists($service, 'deleteElement')) { // Delete element
if ($service->deleteElement($this->uid)) {
$this->noContent();
}
}
}
}
}
}
 
private function add($pairs = null) {
if (is_null($pairs)) {
$pairs = array();
// Récupération des paramètres passés dans le contenu de la requête HTTP (= POST)
// FIXME : vérifier que l'on récupère bien les données passées par PUT
if ($this->requestData) {
$pairs = $this->parseRequestData();
}
}
 
if (count($pairs) != 0) {
$resource_file = 'services/'.ucfirst($this->resource).'.php';
$resource_class = ucfirst($this->resource);
if (file_exists($resource_file)) {
include_once $resource_file;
if (class_exists($resource_class)) {
$service = new $resource_class($this->config);
if (method_exists($service,'createElement')) { // Create a new element
if ($service->createElement($pairs)) {
$this->created();
}
}
}
}
} else {
$this->lengthRequired();
}
}
 
/**
* Parse the HTTP request data.
* @return str[] Array of name value pairs
*/
private function parseRequestData() {
$values = array();
$pairs = explode('&', $this->requestData);
foreach ($pairs as $pair) {
$parts = explode('=', $pair);
if (isset($parts[0]) && isset($parts[1])) {
$parts[1] = rtrim(urldecode($parts[1]));
$values[$parts[0]] = $parts[1];
}
}
return $values;
}
 
/**
* Send a HTTP 201 response header.
*/
private function created($url = FALSE) {
header('HTTP/1.0 201 Created');
if ($url) {
header('Location: '.$url);
}
}
 
/**
* Send a HTTP 204 response header.
*/
private function noContent() {
header('HTTP/1.0 204 No Content');
}
 
/**
* Send a HTTP 400 response header.
*/
private function badRequest() {
header('HTTP/1.0 400 Bad Request');
}
 
/**
* Send a HTTP 401 response header.
*/
private function unauthorized($realm = 'JRest') {
if (!isset($_SERVER['PHP_AUTH_USER']) || !isset($_SERVER['PHP_AUTH_PW'])) {
header('WWW-Authenticate: Basic realm="'.$realm.'"');
}
header('HTTP/1.0 401 Unauthorized');
}
 
/**
* Send a HTTP 404 response header.
*/
private function notFound() {
header('HTTP/1.0 404 Not Found');
}
 
/**
* Send a HTTP 405 response header.
*/
private function methodNotAllowed($allowed = 'GET, HEAD') {
header('HTTP/1.0 405 Method Not Allowed');
header('Allow: '.$allowed);
}
 
/**
* Send a HTTP 406 response header.
*/
private function notAcceptable() {
header('HTTP/1.0 406 Not Acceptable');
echo join(', ', array_keys($this->config['renderers']));
}
 
/**
* Send a HTTP 411 response header.
*/
private function lengthRequired() {
header('HTTP/1.0 411 Length Required');
}
 
/**
* Send a HTTP 500 response header.
*/
private function internalServerError() {
header('HTTP/1.0 500 Internal Server Error');
}
}
?>