Merge remote-tracking branch 'FreshRSS/master'

24 files changed, 1486 insertions, 1116 deletions

diff --git a/lib/Minz/ActionController.php b/lib/Minz/ActionController.php
index 409d9611f..b47c54554 100644
--- a/lib/Minz/ActionController.php
+++ b/lib/Minz/ActionController.php
@@ -8,16 +8,12 @@
  * La classe ActionController représente le contrôleur de l'application
  */
 class Minz_ActionController {
-	protected $router;
 	protected $view;
 
 	/**
 	 * Constructeur
-	 * @param $controller nom du controller
-	 * @param $action nom de l'action à lancer
 	 */
-	public function __construct ($router) {
-		$this->router = $router;
+	public function __construct () {
 		$this->view = new Minz_View ();
 		$this->view->attributeParams ();
 	}
diff --git a/lib/Minz/BadConfigurationException.php b/lib/Minz/BadConfigurationException.php
deleted file mode 100644
index a7b77d687..000000000
--- a/lib/Minz/BadConfigurationException.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-class Minz_BadConfigurationException extends Minz_Exception {
-	public function __construct ($part_missing, $code = self::ERROR) {
-		$message = '`' . $part_missing
-		         . '` in the configuration file is missing or is misconfigured';
-		
-		parent::__construct ($message, $code);
-	}
-}
diff --git a/lib/Minz/Cache.php b/lib/Minz/Cache.php
deleted file mode 100644
index fcb627eb2..000000000
--- a/lib/Minz/Cache.php
+++ /dev/null
@@ -1,116 +0,0 @@
-<?php
-/** 
- * MINZ - Copyright 2011 Marien Fressinaud
- * Sous licence AGPL3 <http://www.gnu.org/licenses/>
-*/
-
-/**
- * La classe Cache permet de gérer facilement les pages en cache
- */
-class Minz_Cache {
-	/**
-	 * $expire timestamp auquel expire le cache de $url
-	 */
-	private $expire = 0;
-
-	/**
-	 * $file est le nom du fichier de cache
-	 */
-	private $file = '';
-
-	/**
-	 * $enabled permet de déterminer si le cache est activé
-	 */
-	private static $enabled = true;
-
-	/**
-	 * Constructeur
-	 */
-	public function __construct () {
-		$this->_fileName ();
-		$this->_expire ();
-	}
-
-	/**
-	 * Setteurs
-	 */
-	public function _fileName () {
-		$file = md5 (Minz_Request::getURI ());
-
-		$this->file = CACHE_PATH . '/'.$file;
-	}
-
-	public function _expire () {
-		if ($this->exist ()) {
-			$this->expire = filemtime ($this->file)
-			              + Minz_Configuration::delayCache ();
-		}
-	}
-
-	/**
-	 * Permet de savoir si le cache est activé
-	 * @return true si activé, false sinon
-	 */
-	public static function isEnabled () {
-		return Minz_Configuration::cacheEnabled () && self::$enabled;
-	}
-
-	/**
-	 * Active / désactive le cache
-	 */
-	public static function switchOn () {
-		self::$enabled = true;
-	}
-	public static function switchOff () {
-		self::$enabled = false;
-	}
-
-	/**
-	 * Détermine si le cache de $url a expiré ou non
-	 * @return true si il a expiré, false sinon
-	 */
-	public function expired () {
-		return time () > $this->expire;
-	}
-
-	/**
-	 * Affiche le contenu du cache
-	 * @print le code html du cache
-	 */
-	public function render () {
-		if ($this->exist ()) {
-			include ($this->file);
-		}
-	}
-
-	/**
-	 * Enregistre $html en cache
-	 * @param $html le html à mettre en cache
-	 */
-	public function cache ($html) {
-		file_put_contents ($this->file, $html);
-	}
-
-	/**
-	 * Permet de savoir si le cache existe
-	 * @return true si il existe, false sinon
-	 */
-	public function exist () {
-		return file_exists ($this->file);
-	}
-
-	/**
-	 * Nettoie le cache en supprimant tous les fichiers
-	 */
-	public static function clean () {
-		$files = opendir (CACHE_PATH);
-
-		while ($fic = readdir ($files)) {
-			if ($fic != '.' && $fic != '..') {
-				unlink (CACHE_PATH.'/'.$fic);
-			}
-		}
-
-		closedir ($files);
-	}
-}
diff --git a/lib/Minz/Configuration.php b/lib/Minz/Configuration.php
index b3de9e39e..d695d4a53 100644
--- a/lib/Minz/Configuration.php
+++ b/lib/Minz/Configuration.php
@@ -1,357 +1,215 @@
 <?php
-/**
- * MINZ - Copyright 2011 Marien Fressinaud
- * Sous licence AGPL3 <http://www.gnu.org/licenses/>
-*/
 
 /**
- * La classe Configuration permet de gérer la configuration de l'application
+ * Manage configuration for the application.
  */
 class Minz_Configuration {
-	const CONF_PATH_NAME = '/config.php';
-
 	/**
-	 * VERSION est la version actuelle de MINZ
+	 * The list of configurations.
 	 */
-	const VERSION = '1.3.1.freshrss';  // version spéciale FreshRSS
+	private static $config_list = array();
 
 	/**
-	 * valeurs possibles pour l'"environment"
-	 * SILENT rend l'application muette (pas de log)
-	 * PRODUCTION est recommandée pour une appli en production
-	 *			(log les erreurs critiques)
-	 * DEVELOPMENT log toutes les erreurs
+	 * Add a new configuration to the list of configuration.
+	 *
+	 * @param $namespace the name of the current configuration
+	 * @param $config_filename the filename of the configuration
+	 * @param $default_filename a filename containing default values for the configuration
+	 * @param $configuration_setter an optional helper to set values in configuration
 	 */
-	const SILENT = 0;
-	const PRODUCTION = 1;
-	const DEVELOPMENT = 2;
+	public static function register($namespace, $config_filename, $default_filename = null,
+	                                $configuration_setter = null) {
+		self::$config_list[$namespace] = new Minz_Configuration(
+			$namespace, $config_filename, $default_filename, $configuration_setter
+		);
+	}
 
 	/**
-	 * définition des variables de configuration
-	 * $salt une chaîne de caractères aléatoires (obligatoire)
-	 * $environment gère le niveau d'affichage pour log et erreurs
-	 * $use_url_rewriting indique si on utilise l'url_rewriting
-	 * $base_url le chemin de base pour accéder à l'application
-	 * $title le nom de l'application
-	 * $language la langue par défaut de l'application
-	 * $cacheEnabled permet de savoir si le cache doit être activé
-	 * $delayCache la limite de cache
-	 * $db paramètres pour la base de données (tableau)
-	 *     - host le serveur de la base
-	 *     - user nom d'utilisateur
-	 *     - password mot de passe de l'utilisateur
-	 *     - base le nom de la base de données
+	 * Parse a file and return its data.
+	 *
+	 * If the file does not contain a valid PHP code returning an array, an
+	 * empty array is returned anyway.
+	 *
+	 * @param $filename the name of the file to parse.
+	 * @return an array of values
+	 * @throws Minz_FileNotExistException if the file does not exist.
 	 */
-	private static $salt = '';
-	private static $environment = Minz_Configuration::PRODUCTION;
-	private static $base_url = '';
-	private static $use_url_rewriting = false;
-	private static $title = '';
-	private static $language = 'en';
-	private static $cache_enabled = false;
-	private static $delay_cache = 3600;
-	private static $default_user = '';
-	private static $allow_anonymous = false;
-	private static $allow_anonymous_refresh = false;
-	private static $auth_type = 'none';
-
-	private static $db = array (
-		'type' => 'mysql',
-		'host' => '',
-		'user' => '',
-		'password' => '',
-		'base' => '',
-		'prefix' => '',
-	);
+	public static function load($filename) {
+		if (!file_exists($filename)) {
+			throw new Minz_FileNotExistException($filename);
+		}
 
-	/*
-	 * Getteurs
-	 */
-	public static function salt () {
-		return self::$salt;
+		$data = include($filename);
+		if (is_array($data)) {
+			return $data;
+		} else {
+			return array();
+		}
 	}
-	public static function environment ($str = false) {
-		$env = self::$environment;
 
-		if ($str) {
-			switch (self::$environment) {
-			case self::SILENT:
-				$env = 'silent';
-				break;
-			case self::DEVELOPMENT:
-				$env = 'development';
-				break;
-			case self::PRODUCTION:
-			default:
-				$env = 'production';
-			}
+	/**
+	 * Return the configuration related to a given namespace.
+	 *
+	 * @param $namespace the name of the configuration to get.
+	 * @return a Minz_Configuration object
+	 * @throws Minz_ConfigurationNamespaceException if the namespace does not exist.
+	 */
+	public static function get($namespace) {
+		if (!isset(self::$config_list[$namespace])) {
+			throw new Minz_ConfigurationNamespaceException(
+				$namespace . ' namespace does not exist'
+			);
 		}
 
-		return $env;
-	}
-	public static function baseUrl () {
-		return self::$base_url;
-	}
-	public static function useUrlRewriting () {
-		return self::$use_url_rewriting;
-	}
-	public static function title () {
-		return self::$title;
-	}
-	public static function language () {
-		return self::$language;
-	}
-	public static function cacheEnabled () {
-		return self::$cache_enabled;
-	}
-	public static function delayCache () {
-		return self::$delay_cache;
-	}
-	public static function dataBase () {
-		return self::$db;
-	}
-	public static function defaultUser () {
-		return self::$default_user;
-	}
-	public static function isAdmin($currentUser) {
-		return $currentUser === self::$default_user;
-	}
-	public static function allowAnonymous() {
-		return self::$allow_anonymous;
-	}
-	public static function allowAnonymousRefresh() {
-		return self::$allow_anonymous_refresh;
-	}
-	public static function authType() {
-		return self::$auth_type;
-	}
-	public static function needsLogin() {
-		return self::$auth_type !== 'none';
-	}
-	public static function canLogIn() {
-		return self::$auth_type === 'form' || self::$auth_type === 'persona';
+		return self::$config_list[$namespace];
 	}
 
-	public static function _allowAnonymous($allow = false) {
-		self::$allow_anonymous = ((bool)$allow) && self::canLogIn();
-	}
-	public static function _allowAnonymousRefresh($allow = false) {
-		self::$allow_anonymous_refresh = ((bool)$allow) && self::allowAnonymous();
+	/**
+	 * The namespace of the current configuration.
+	 */
+	private $namespace = '';
+
+	/**
+	 * The filename for the current configuration.
+	 */
+	private $config_filename = '';
+
+	/**
+	 * The filename for the current default values, null by default.
+	 */
+	private $default_filename = null;
+
+	/**
+	 * The configuration values, an empty array by default.
+	 */
+	private $data = array();
+
+	/**
+	 * An object which help to set good values in configuration.
+	 */
+	private $configuration_setter = null;
+
+	public function removeExtension($ext_name) {
+		self::$extensions_enabled = array_diff(
+			self::$extensions_enabled,
+			array($ext_name)
+		);
 	}
-	public static function _authType($value) {
-		$value = strtolower($value);
-		switch ($value) {
-			case 'form':
-			case 'http_auth':
-			case 'persona':
-			case 'none':
-				self::$auth_type = $value;
-				break;
+	public function addExtension($ext_name) {
+		$found = array_search($ext_name, self::$extensions_enabled) !== false;
+		if (!$found) {
+			self::$extensions_enabled[] = $ext_name;
 		}
-		self::_allowAnonymous(self::$allow_anonymous);
 	}
 
 	/**
-	 * Initialise les variables de configuration
-	 * @exception Minz_FileNotExistException si le CONF_PATH_NAME n'existe pas
-	 * @exception Minz_BadConfigurationException si CONF_PATH_NAME mal formaté
+	 * Create a new Minz_Configuration object.
+	 * 
+	 * @param $namespace the name of the current configuration.
+	 * @param $config_filename the file containing configuration values.
+	 * @param $default_filename the file containing default values, null by default.
+	 * @param $configuration_setter an optional helper to set values in configuration
 	 */
-	public static function init () {
+	private function __construct($namespace, $config_filename, $default_filename = null,
+	                             $configuration_setter = null) {
+		$this->namespace = $namespace;
+		$this->config_filename = $config_filename;
+		$this->default_filename = $default_filename;
+		$this->_configurationSetter($configuration_setter);
+
+		if (!is_null($this->default_filename)) {
+			$this->data = self::load($this->default_filename);
+		}
+
 		try {
-			self::parseFile ();
-			self::setReporting ();
+			$this->data = array_replace_recursive(
+				$this->data, self::load($this->config_filename)
+			);
 		} catch (Minz_FileNotExistException $e) {
-			throw $e;
-		} catch (Minz_BadConfigurationException $e) {
-			throw $e;
+			if (is_null($this->default_filename)) {
+				throw $e;
+			}
 		}
 	}
 
-	public static function writeFile() {
-		$ini_array = array(
-			'general' => array(
-				'environment' => self::environment(true),
-				'use_url_rewriting' => self::$use_url_rewriting,
-				'salt' => self::$salt,
-				'base_url' => self::$base_url,
-				'title' => self::$title,
-				'default_user' => self::$default_user,
-				'allow_anonymous' => self::$allow_anonymous,
-				'allow_anonymous_refresh' => self::$allow_anonymous_refresh,
-				'auth_type' => self::$auth_type,
-			),
-			'db' => self::$db,
-		);
-		@rename(DATA_PATH . self::CONF_PATH_NAME, DATA_PATH . self::CONF_PATH_NAME . '.bak.php');
-		$result = file_put_contents(DATA_PATH . self::CONF_PATH_NAME, "<?php\n return " . var_export($ini_array, true) . ';');
-		if (function_exists('opcache_invalidate')) {
-			opcache_invalidate(DATA_PATH . self::CONF_PATH_NAME);	//Clear PHP 5.5+ cache for include
+	/**
+	 * Set a configuration setter for the current configuration.
+	 * @param $configuration_setter the setter to call when modifying data. It
+	 *        must implement an handle($key, $value) method.
+	 */
+	public function _configurationSetter($configuration_setter) {
+		if (is_callable(array($configuration_setter, 'handle'))) {
+			$this->configuration_setter = $configuration_setter;
 		}
-		return (bool)$result;
 	}
 
 	/**
-	 * Parse un fichier de configuration
-	 * @exception Minz_PermissionDeniedException si le CONF_PATH_NAME n'est pas accessible
-	 * @exception Minz_BadConfigurationException si CONF_PATH_NAME mal formaté
+	 * Return the value of the given param.
+	 * 
+	 * @param $key the name of the param.
+	 * @param $default default value to return if key does not exist.
+	 * @return the value corresponding to the key.
+	 * @throws Minz_ConfigurationParamException if the param does not exist
 	 */
-	private static function parseFile () {
-		$ini_array = include(DATA_PATH . self::CONF_PATH_NAME);
-
-		if (!is_array($ini_array)) {
-			throw new Minz_PermissionDeniedException (
-				DATA_PATH . self::CONF_PATH_NAME,
-				Minz_Exception::ERROR
-			);
+	public function param($key, $default = null) {
+		if (isset($this->data[$key])) {
+			return $this->data[$key];
+		} elseif (!is_null($default)) {
+			return $default;
+		} else {
+			Minz_Log::warning($key . ' does not exist in configuration');
+			return null;
 		}
+	}
 
-		// [general] est obligatoire
-		if (!isset ($ini_array['general'])) {
-			throw new Minz_BadConfigurationException (
-				'[general]',
-				Minz_Exception::ERROR
-			);
-		}
-		$general = $ini_array['general'];
+	/**
+	 * A wrapper for param().
+	 */
+	public function __get($key) {
+		return $this->param($key);
+	}
 
-		// salt est obligatoire
-		if (!isset ($general['salt'])) {
-			if (isset($general['sel_application'])) {	//v0.6
-				$general['salt'] = $general['sel_application'];
-			} else {
-				throw new Minz_BadConfigurationException (
-					'salt',
-					Minz_Exception::ERROR
-				);
-			}
+	/**
+	 * Set or remove a param.
+	 *
+	 * @param $key the param name to set.
+	 * @param $value the value to set. If null, the key is removed from the configuration.
+	 */
+	public function _param($key, $value = null) {
+		if (!is_null($this->configuration_setter) && $this->configuration_setter->support($key)) {
+			$this->configuration_setter->handle($this->data, $key, $value);
+		} elseif (isset($this->data[$key]) && is_null($value)) {
+			unset($this->data[$key]);
+		} elseif (!is_null($value)) {
+			$this->data[$key] = $value;
 		}
-		self::$salt = $general['salt'];
+	}
 
-		if (isset ($general['environment'])) {
-			switch ($general['environment']) {
-			case 'silent':
-				self::$environment = Minz_Configuration::SILENT;
-				break;
-			case 'development':
-				self::$environment = Minz_Configuration::DEVELOPMENT;
-				break;
-			case 'production':
-				self::$environment = Minz_Configuration::PRODUCTION;
-				break;
-			default:
-				if ($general['environment'] >= 0 &&
-					$general['environment'] <= 2) {
-					// fallback 0.7-beta
-					self::$environment = $general['environment'];
-				} else {
-					throw new Minz_BadConfigurationException (
-						'environment',
-						Minz_Exception::ERROR
-					);
-				}
-			}
+	/**
+	 * A wrapper for _param().
+	 */
+	public function __set($key, $value) {
+		$this->_param($key, $value);
+	}
 
-		}
-		if (isset ($general['base_url'])) {
-			self::$base_url = $general['base_url'];
-		}
-		if (isset ($general['use_url_rewriting'])) {
-			self::$use_url_rewriting = $general['use_url_rewriting'];
-		}
+	/**
+	 * Save the current configuration in the configuration file.
+	 */
+	public function save() {
+		$back_filename = $this->config_filename . '.bak.php';
+		@rename($this->config_filename, $back_filename);
 
-		if (isset ($general['title'])) {
-			self::$title = $general['title'];
-		}
-		if (isset ($general['language'])) {
-			self::$language = $general['language'];
-		}
-		if (isset ($general['cache_enabled'])) {
-			self::$cache_enabled = $general['cache_enabled'];
-			if (CACHE_PATH === false && self::$cache_enabled) {
-				throw new FileNotExistException (
-					'CACHE_PATH',
-					Minz_Exception::ERROR
-				);
-			}
+		if (file_put_contents($this->config_filename,
+		                      "<?php\nreturn " . var_export($this->data, true) . ';',
+		                      LOCK_EX) === false) {
+			return false;
 		}
-		if (isset ($general['delay_cache'])) {
-			self::$delay_cache = inval($general['delay_cache']);
-		}
-		if (isset ($general['default_user'])) {
-			self::$default_user = $general['default_user'];
-		}
-		if (isset ($general['auth_type'])) {
-			self::_authType($general['auth_type']);
-		}
-		if (isset ($general['allow_anonymous'])) {
-			self::$allow_anonymous = (
-				((bool)($general['allow_anonymous'])) &&
-				($general['allow_anonymous'] !== 'no')
-			);
-		}
-		if (isset ($general['allow_anonymous_refresh'])) {
-			self::$allow_anonymous_refresh = (
-				((bool)($general['allow_anonymous_refresh'])) &&
-				($general['allow_anonymous_refresh'] !== 'no')
-			);
-		}
-
-		// Base de données
-		if (isset ($ini_array['db'])) {
-			$db = $ini_array['db'];
-			if (empty($db['host'])) {
-				throw new Minz_BadConfigurationException (
-					'host',
-					Minz_Exception::ERROR
-				);
-			}
-			if (empty($db['user'])) {
-				throw new Minz_BadConfigurationException (
-					'user',
-					Minz_Exception::ERROR
-				);
-			}
-			if (!isset ($db['password'])) {
-				throw new Minz_BadConfigurationException (
-					'password',
-					Minz_Exception::ERROR
-				);
-			}
-			if (empty($db['base'])) {
-				throw new Minz_BadConfigurationException (
-					'base',
-					Minz_Exception::ERROR
-				);
-			}
 
-			if (!empty($db['type'])) {
-				self::$db['type'] = $db['type'];
-			}
-			self::$db['host'] = $db['host'];
-			self::$db['user'] = $db['user'];
-			self::$db['password'] = $db['password'];
-			self::$db['base'] = $db['base'];
-			if (isset($db['prefix'])) {
-				self::$db['prefix'] = $db['prefix'];
-			}
+		// Clear PHP 5.5+ cache for include
+		if (function_exists('opcache_invalidate')) {
+			opcache_invalidate($this->config_filename);
 		}
-	}
 
-	private static function setReporting() {
-		switch (self::$environment) {
-			case self::PRODUCTION:
-				error_reporting(E_ALL);
-				ini_set('display_errors','Off');
-				ini_set('log_errors', 'On');
-				break;
-			case self::DEVELOPMENT:
-				error_reporting(E_ALL);
-				ini_set('display_errors','On');
-				ini_set('log_errors', 'On');
-				break;
-			case self::SILENT:
-				error_reporting(0);
-				break;
-		}
+		return true;
 	}
 }
diff --git a/lib/Minz/ConfigurationException.php b/lib/Minz/ConfigurationException.php
new file mode 100644
index 000000000..f294c3341
--- /dev/null
+++ b/lib/Minz/ConfigurationException.php
@@ -0,0 +1,8 @@
+<?php
+
+class Minz_ConfigurationException extends Minz_Exception {
+	public function __construct($error, $code = self::ERROR) {
+		$message = 'Configuration error: ' . $error;
+		parent::__construct($message, $code);
+	}
+}
diff --git a/lib/Minz/ConfigurationNamespaceException.php b/lib/Minz/ConfigurationNamespaceException.php
new file mode 100644
index 000000000..f4278c5d6
--- /dev/null
+++ b/lib/Minz/ConfigurationNamespaceException.php
@@ -0,0 +1,4 @@
+<?php
+
+class Minz_ConfigurationNamespaceException extends Minz_ConfigurationException {
+}
diff --git a/lib/Minz/ConfigurationParamException.php b/lib/Minz/ConfigurationParamException.php
new file mode 100644
index 000000000..eac977935
--- /dev/null
+++ b/lib/Minz/ConfigurationParamException.php
@@ -0,0 +1,4 @@
+<?php
+
+class Minz_ConfigurationParamException extends Minz_ConfigurationException {
+}
diff --git a/lib/Minz/Dispatcher.php b/lib/Minz/Dispatcher.php
index 71dfe8ac6..125ce5757 100644
--- a/lib/Minz/Dispatcher.php
+++ b/lib/Minz/Dispatcher.php
@@ -14,97 +14,72 @@ class Minz_Dispatcher {
 
 	/* singleton */
 	private static $instance = null;
+	private static $needsReset;
+	private static $registrations = array();
 
-	private $router;
 	private $controller;
 
 	/**
 	 * Récupère l'instance du Dispatcher
 	 */
-	public static function getInstance ($router) {
+	public static function getInstance () {
 		if (self::$instance === null) {
-			self::$instance = new Minz_Dispatcher ($router);
+			self::$instance = new Minz_Dispatcher ();
 		}
 		return self::$instance;
 	}
 
 	/**
-	 * Constructeur
-	 */
-	private function __construct ($router) {
-		$this->router = $router;
-	}
-
-	/**
 	 * Lance le controller indiqué dans Request
 	 * Remplit le body de Response à partir de la Vue
 	 * @exception Minz_Exception
 	 */
-	public function run ($ob = true) {
-		$cache = new Minz_Cache();
-		// Le ob_start est dupliqué : sans ça il y a un bug sous Firefox
-		// ici on l'appelle avec 'ob_gzhandler', après sans.
-		// Vraisemblablement la compression fonctionne mais c'est sale
-		// J'ignore les effets de bord :(
-		if ($ob) {
-			ob_start ('ob_gzhandler');
-		}
+	public function run () {
+		do {
+			self::$needsReset = false;
 
-		if (Minz_Cache::isEnabled () && !$cache->expired ()) {
-			if ($ob) {
-				ob_start ();
-			}
-			$cache->render ();
-			if ($ob) {
-				$text = ob_get_clean();
-			}
-		} else {
-			$text = '';	//TODO: Clean this code
-			while (Minz_Request::$reseted) {
-				Minz_Request::$reseted = false;
-
-				try {
-					$this->createController ('FreshRSS_' . Minz_Request::controllerName () . '_Controller');
-					$this->controller->init ();
-					$this->controller->firstAction ();
+			try {
+				$this->createController (Minz_Request::controllerName ());
+				$this->controller->init ();
+				$this->controller->firstAction ();
+				if (!self::$needsReset) {
 					$this->launchAction (
 						Minz_Request::actionName ()
 						. 'Action'
 					);
-					$this->controller->lastAction ();
-
-					if (!Minz_Request::$reseted) {
-						if ($ob) {
-							ob_start ();
-						}
-						$this->controller->view ()->build ();
-						if ($ob) {
-							$text = ob_get_clean();
-						}
-					}
-				} catch (Minz_Exception $e) {
-					throw $e;
 				}
-			}
+				$this->controller->lastAction ();
 
-			if (Minz_Cache::isEnabled ()) {
-				$cache->cache ($text);
+				if (!self::$needsReset) {
+					$this->controller->view ()->build ();
+				}
+			} catch (Minz_Exception $e) {
+				throw $e;
 			}
-		}
+		} while (self::$needsReset);
+	}
 
-		Minz_Response::setBody ($text);
+	/**
+	 * Informe le contrôleur qu'il doit recommancer car la requête a été modifiée
+	 */
+	public static function reset() {
+		self::$needsReset = true;
 	}
 
 	/**
 	 * Instancie le Controller
-	 * @param $controller_name le nom du controller à instancier
+	 * @param $base_name le nom du controller à instancier
 	 * @exception ControllerNotExistException le controller n'existe pas
 	 * @exception ControllerNotActionControllerException controller n'est
 	 *          > pas une instance de ActionController
 	 */
-	private function createController ($controller_name) {
-		$filename = APP_PATH . self::CONTROLLERS_PATH_NAME . '/'
-		          . $controller_name . '.php';
+	private function createController ($base_name) {
+		if (self::isRegistered($base_name)) {
+			self::loadController($base_name);
+			$controller_name = 'FreshExtension_' . $base_name . '_Controller';
+		} else {
+			$controller_name = 'FreshRSS_' . $base_name . '_Controller';
+		}
 
 		if (!class_exists ($controller_name)) {
 			throw new Minz_ControllerNotExistException (
@@ -112,7 +87,7 @@ class Minz_Dispatcher {
 				Minz_Exception::ERROR
 			);
 		}
-		$this->controller = new $controller_name ($this->router);
+		$this->controller = new $controller_name ();
 
 		if (! ($this->controller instanceof Minz_ActionController)) {
 			throw new Minz_ControllerNotActionControllerException (
@@ -129,21 +104,57 @@ class Minz_Dispatcher {
 	 *  le controller
 	 */
 	private function launchAction ($action_name) {
-		if (!Minz_Request::$reseted) {
-			if (!is_callable (array (
-				$this->controller,
-				$action_name
-			))) {
-				throw new Minz_ActionException (
-					get_class ($this->controller),
-					$action_name,
-					Minz_Exception::ERROR
-				);
-			}
-			call_user_func (array (
-				$this->controller,
-				$action_name
-			));
+		if (!is_callable (array (
+			$this->controller,
+			$action_name
+		))) {
+			throw new Minz_ActionException (
+				get_class ($this->controller),
+				$action_name,
+				Minz_Exception::ERROR
+			);
 		}
+		call_user_func (array (
+			$this->controller,
+			$action_name
+		));
+	}
+
+	/**
+	 * Register a controller file.
+	 *
+	 * @param $base_name the base name of the controller (i.e. ./?c=<base_name>)
+	 * @param $base_path the base path where we should look into to find info.
+	 */
+	public static function registerController($base_name, $base_path) {
+		if (!self::isRegistered($base_name)) {
+			self::$registrations[$base_name] = $base_path;
+		}
+	}
+
+	/**
+	 * Return if a controller is registered.
+	 *
+	 * @param $base_name the base name of the controller.
+	 * @return true if the controller has been registered, false else.
+	 */
+	public static function isRegistered($base_name) {
+		return isset(self::$registrations[$base_name]);
+	}
+
+	/**
+	 * Load a controller file (include).
+	 *
+	 * @param $base_name the base name of the controller.
+	 */
+	private static function loadController($base_name) {
+		$base_path = self::$registrations[$base_name];
+		$controller_filename = $base_path . '/controllers/' . $base_name . 'Controller.php';
+		include_once $controller_filename;
+	}
+
+	private static function setViewPath($controller, $base_name) {
+		$base_path = self::$registrations[$base_name];
+		$controller->view()->setBasePathname($base_path);
 	}
 }
diff --git a/lib/Minz/Error.php b/lib/Minz/Error.php
index 337ab6c0a..3e4a3e8f3 100644
--- a/lib/Minz/Error.php
+++ b/lib/Minz/Error.php
@@ -19,41 +19,28 @@ class Minz_Error {
 	*      > $logs['notice']
 	* @param $redirect indique s'il faut forcer la redirection (les logs ne seront pas transmis)
 	*/
-	public static function error ($code = 404, $logs = array (), $redirect = false) {
+	public static function error ($code = 404, $logs = array (), $redirect = true) {
 		$logs = self::processLogs ($logs);
 		$error_filename = APP_PATH . '/Controllers/errorController.php';
 
 		if (file_exists ($error_filename)) {
-			$params = array (
-				'code' => $code,
-				'logs' => $logs
-			);
+			Minz_Session::_param('error_code', $code);
+			Minz_Session::_param('error_logs', $logs);
 
-			Minz_Response::setHeader ($code);
-			if ($redirect) {
-				Minz_Request::forward (array (
-					'c' => 'error'
-				), true);
-			} else {
-				Minz_Request::forward (array (
-					'c' => 'error',
-					'params' => $params
-				), false);
-			}
+			Minz_Request::forward (array (
+				'c' => 'error'
+			), $redirect);
 		} else {
-			$text = '<h1>An error occured</h1>'."\n";
+			echo '<h1>An error occured</h1>' . "\n";
 
 			if (!empty ($logs)) {
-				$text .= '<ul>'."\n";
+				echo '<ul>' . "\n";
 				foreach ($logs as $log) {
-					$text .= '<li>' . $log . '</li>'."\n";
+					echo '<li>' . $log . '</li>' . "\n";
 				}
-				$text .= '</ul>'."\n";
+				echo '</ul>' . "\n";
 			}
 
-			Minz_Response::setHeader ($code);
-			Minz_Response::setBody ($text);
-			Minz_Response::send ();
 			exit ();
 		}
 	}
@@ -66,7 +53,8 @@ class Minz_Error {
 	 *       > en fonction de l'environment
 	 */
 	private static function processLogs ($logs) {
-		$env = Minz_Configuration::environment ();
+		$conf = Minz_Configuration::get('system');
+		$env = $conf->environment;
 		$logs_ok = array ();
 		$error = array ();
 		$warning = array ();
@@ -82,10 +70,10 @@ class Minz_Error {
 			$notice = $logs['notice'];
 		}
 
-		if ($env == Minz_Configuration::PRODUCTION) {
+		if ($env == 'production') {
 			$logs_ok = $error;
 		}
-		if ($env == Minz_Configuration::DEVELOPMENT) {
+		if ($env == 'development') {
 			$logs_ok = array_merge ($error, $warning, $notice);
 		}
 
diff --git a/lib/Minz/Extension.php b/lib/Minz/Extension.php
new file mode 100644
index 000000000..78b8a2725
--- /dev/null
+++ b/lib/Minz/Extension.php
@@ -0,0 +1,208 @@
+<?php
+
+/**
+ * The extension base class.
+ */
+class Minz_Extension {
+	private $name;
+	private $entrypoint;
+	private $path;
+	private $author;
+	private $description;
+	private $version;
+	private $type;
+
+	public static $authorized_types = array(
+		'system',
+		'user',
+	);
+
+	private $is_enabled;
+
+	/**
+	 * The constructor to assign specific information to the extension.
+	 *
+	 * Available fields are:
+	 * - name: the name of the extension (required).
+	 * - entrypoint: the extension class name (required).
+	 * - path: the pathname to the extension files (required).
+	 * - author: the name and / or email address of the extension author.
+	 * - description: a short description to describe the extension role.
+	 * - version: a version for the current extension.
+	 * - type: "system" or "user" (default).
+	 *
+	 * It must not be redefined by child classes.
+	 *
+	 * @param $meta_info contains information about the extension.
+	 */
+	public function __construct($meta_info) {
+		$this->name = $meta_info['name'];
+		$this->entrypoint = $meta_info['entrypoint'];
+		$this->path = $meta_info['path'];
+		$this->author = isset($meta_info['author']) ? $meta_info['author'] : '';
+		$this->description = isset($meta_info['description']) ? $meta_info['description'] : '';
+		$this->version = isset($meta_info['version']) ? $meta_info['version'] : '0.1';
+		$this->setType(isset($meta_info['type']) ? $meta_info['type'] : 'user');
+
+		$this->is_enabled = false;
+	}
+
+	/**
+	 * Used when installing an extension (e.g. update the database scheme).
+	 *
+	 * It must be redefined by child classes.
+	 *
+	 * @return true if the extension has been installed or a string explaining
+	 *         the problem.
+	 */
+	public function install() {
+		return true;
+	}
+
+	/**
+	 * Used when uninstalling an extension (e.g. revert the database scheme to
+	 * cancel changes from install).
+	 *
+	 * It must be redefined by child classes.
+	 *
+	 * @return true if the extension has been uninstalled or a string explaining
+	 *         the problem.
+	 */
+	public function uninstall() {
+		return true;
+	}
+
+	/**
+	 * Call at the initialization of the extension (i.e. when the extension is
+	 * enabled by the extension manager).
+	 *
+	 * It must be redefined by child classes.
+	 */
+	public function init() {}
+
+	/**
+	 * Set the current extension to enable.
+	 */
+	public function enable() {
+		$this->is_enabled = true;
+	}
+
+	/**
+	 * Return if the extension is currently enabled.
+	 *
+	 * @return true if extension is enabled, false else.
+	 */
+	public function isEnabled() {
+		return $this->is_enabled;
+	}
+
+	/**
+	 * Return the content of the configure view for the current extension.
+	 *
+	 * @return the html content from ext_dir/configure.phtml, false if it does
+	 *         not exist.
+	 */
+	public function getConfigureView() {
+		$filename = $this->path . '/configure.phtml';
+		if (!file_exists($filename)) {
+			return false;
+		}
+
+		ob_start();
+		include($filename);
+		return ob_get_clean();
+	}
+
+	/**
+	 * Handle the configure action.
+	 *
+	 * It must be redefined by child classes.
+	 */
+	public function handleConfigureAction() {}
+
+	/**
+	 * Getters and setters.
+	 */
+	public function getName() {
+		return $this->name;
+	}
+	public function getEntrypoint() {
+		return $this->entrypoint;
+	}
+	public function getPath() {
+		return $this->path;
+	}
+	public function getAuthor() {
+		return $this->author;
+	}
+	public function getDescription() {
+		return $this->description;
+	}
+	public function getVersion() {
+		return $this->version;
+	}
+	public function getType() {
+		return $this->type;
+	}
+	private function setType($type) {
+		if (!in_array($type, self::$authorized_types)) {
+			throw new Minz_ExtensionException('invalid `type` info', $this->name);
+		}
+		$this->type = $type;
+	}
+
+	/**
+	 * Return the url for a given file.
+	 *
+	 * @param $filename name of the file to serve.
+	 * @param $type the type (js or css) of the file to serve.
+	 * @return the url corresponding to the file.
+	 */
+	public function getFileUrl($filename, $type) {
+		$dir = substr(strrchr($this->path, '/'), 1);
+		$file_name_url = urlencode($dir . '/static/' . $filename);
+
+		$absolute_path = $this->path . '/static/' . $filename;
+		$mtime = @filemtime($absolute_path);
+
+		$url = '/ext.php?f=' . $file_name_url .
+		       '&amp;t=' . $type .
+		       '&amp;' . $mtime;
+		return Minz_Url::display($url, 'php');
+	}
+
+	/**
+	 * Register a controller in the Dispatcher.
+	 *
+	 * @param @base_name the base name of the controller. Final name will be:
+	 *                   FreshExtension_<base_name>_Controller.
+	 */
+	public function registerController($base_name) {
+		Minz_Dispatcher::registerController($base_name, $this->path);
+	}
+
+	/**
+	 * Register the views in order to be accessible by the application.
+	 */
+	public function registerViews() {
+		Minz_View::addBasePathname($this->path);
+	}
+
+	/**
+	 * Register i18n files from ext_dir/i18n/
+	 */
+	public function registerTranslates() {
+		$i18n_dir = $this->path . '/i18n';
+		Minz_Translate::registerPath($i18n_dir);
+	}
+
+	/**
+	 * Register a new hook.
+	 *
+	 * @param $hook_name the hook name (must exist).
+	 * @param $hook_function the function name to call (must be callable).
+	 */
+	public function registerHook($hook_name, $hook_function) {
+		Minz_ExtensionManager::addHook($hook_name, $hook_function, $this);
+	}
+}
diff --git a/lib/Minz/ExtensionException.php b/lib/Minz/ExtensionException.php
new file mode 100644
index 000000000..647f1a9b9
--- /dev/null
+++ b/lib/Minz/ExtensionException.php
@@ -0,0 +1,15 @@
+<?php
+
+class Minz_ExtensionException extends Minz_Exception {
+	public function __construct ($message, $extension_name = false, $code = self::ERROR) {
+		if ($extension_name) {
+			$message = 'An error occured in `' . $extension_name
+			         . '` extension with the message: ' . $message;
+		} else {
+			$message = 'An error occured in an unnamed '
+			         . 'extension with the message: ' . $message;
+		}
+
+		parent::__construct($message, $code);
+	}
+}
diff --git a/lib/Minz/ExtensionManager.php b/lib/Minz/ExtensionManager.php
new file mode 100644
index 000000000..c5c68a8d4
--- /dev/null
+++ b/lib/Minz/ExtensionManager.php
@@ -0,0 +1,301 @@
+<?php
+
+/**
+ * An extension manager to load extensions present in EXTENSIONS_PATH.
+ *
+ * @todo see coding style for methods!!
+ */
+class Minz_ExtensionManager {
+	private static $ext_metaname = 'metadata.json';
+	private static $ext_entry_point = 'extension.php';
+	private static $ext_list = array();
+	private static $ext_list_enabled = array();
+
+	private static $ext_auto_enabled = array();
+
+	// List of available hooks. Please keep this list sorted.
+	private static $hook_list = array(
+		'entry_before_display' => array(  // function($entry) -> Entry | null
+			'list' => array(),
+			'signature' => 'OneToOne',
+		),
+		'entry_before_insert' => array(  // function($entry) -> Entry | null
+			'list' => array(),
+			'signature' => 'OneToOne',
+		),
+		'feed_before_insert' => array(  // function($feed) -> Feed | null
+			'list' => array(),
+			'signature' => 'OneToOne',
+		),
+		'post_update' => array(  // function(none) -> none
+			'list' => array(),
+			'signature' => 'NoneToNone',
+		),
+	);
+	private static $ext_to_hooks = array();
+
+	/**
+	 * Initialize the extension manager by loading extensions in EXTENSIONS_PATH.
+	 *
+	 * A valid extension is a directory containing metadata.json and
+	 * extension.php files.
+	 * metadata.json is a JSON structure where the only required fields are
+	 * `name` and `entry_point`.
+	 * extension.php should contain at least a class named <name>Extension where
+	 * <name> must match with the entry point in metadata.json. This class must
+	 * inherit from Minz_Extension class.
+	 */
+	public static function init() {
+		$list_potential_extensions = array_values(array_diff(
+			scandir(EXTENSIONS_PATH),
+			array('..', '.')
+		));
+
+		$system_conf = Minz_Configuration::get('system');
+		self::$ext_auto_enabled = $system_conf->extensions_enabled;
+
+		foreach ($list_potential_extensions as $ext_dir) {
+			$ext_pathname = EXTENSIONS_PATH . '/' . $ext_dir;
+			if (!is_dir($ext_pathname)) {
+				continue;
+			}
+			$metadata_filename = $ext_pathname . '/' . self::$ext_metaname;
+
+			// Try to load metadata file.
+			if (!file_exists($metadata_filename)) {
+				// No metadata file? Invalid!
+				continue;
+			}
+			$meta_raw_content = file_get_contents($metadata_filename);
+			$meta_json = json_decode($meta_raw_content, true);
+			if (!$meta_json || !self::isValidMetadata($meta_json)) {
+				// metadata.json is not a json file? Invalid!
+				// or metadata.json is invalid (no required information), invalid!
+				Minz_Log::warning('`' . $metadata_filename . '` is not a valid metadata file');
+				continue;
+			}
+
+			$meta_json['path'] = $ext_pathname;
+
+			// Try to load extension itself
+			$extension = self::load($meta_json);
+			if (!is_null($extension)) {
+				self::register($extension);
+			}
+		}
+	}
+
+	/**
+	 * Indicates if the given parameter is a valid metadata array.
+	 *
+	 * Required fields are:
+	 * - `name`: the name of the extension
+	 * - `entry_point`: a class name to load the extension source code
+	 * If the extension class name is `TestExtension`, entry point will be `Test`.
+	 * `entry_point` must be composed of alphanumeric characters.
+	 *
+	 * @param $meta is an array of values.
+	 * @return true if the array is valid, false else.
+	 */
+	public static function isValidMetadata($meta) {
+		$valid_chars = array('_');
+		return !(empty($meta['name']) ||
+		         empty($meta['entrypoint']) ||
+		         !ctype_alnum(str_replace($valid_chars, '', $meta['entrypoint'])));
+	}
+
+	/**
+	 * Load the extension source code based on info metadata.
+	 *
+	 * @param $info an array containing information about extension.
+	 * @return an extension inheriting from Minz_Extension.
+	 */
+	public static function load($info) {
+		$entry_point_filename = $info['path'] . '/' . self::$ext_entry_point;
+		$ext_class_name = $info['entrypoint'] . 'Extension';
+
+		include_once($entry_point_filename);
+
+		// Test if the given extension class exists.
+		if (!class_exists($ext_class_name)) {
+			Minz_Log::warning('`' . $ext_class_name .
+			                  '` cannot be found in `' . $entry_point_filename . '`');
+			return null;
+		}
+
+		// Try to load the class.
+		$extension = null;
+		try {
+			$extension = new $ext_class_name($info);
+		} catch (Minz_ExtensionException $e) {
+			// We cannot load the extension? Invalid!
+			Minz_Log::warning('In `' . $metadata_filename . '`: ' . $e->getMessage());
+			return null;
+		}
+
+		// Test if class is correct.
+		if (!($extension instanceof Minz_Extension)) {
+			Minz_Log::warning('`' . $ext_class_name .
+			                  '` is not an instance of `Minz_Extension`');
+			return null;
+		}
+
+		return $extension;
+	}
+
+	/**
+	 * Add the extension to the list of the known extensions ($ext_list).
+	 *
+	 * If the extension is present in $ext_auto_enabled and if its type is "system",
+	 * it will be enabled in the same time.
+	 *
+	 * @param $ext a valid extension.
+	 */
+	public static function register($ext) {
+		$name = $ext->getName();
+		self::$ext_list[$name] = $ext;
+
+		if ($ext->getType() === 'system' &&
+				in_array($name, self::$ext_auto_enabled)) {
+			self::enable($ext->getName());
+		}
+
+		self::$ext_to_hooks[$name] = array();
+	}
+
+	/**
+	 * Enable an extension so it will be called when necessary.
+	 *
+	 * The extension init() method will be called.
+	 *
+	 * @param $ext_name is the name of a valid extension present in $ext_list.
+	 */
+	public static function enable($ext_name) {
+		if (isset(self::$ext_list[$ext_name])) {
+			$ext = self::$ext_list[$ext_name];
+			self::$ext_list_enabled[$ext_name] = $ext;
+			$ext->enable();
+			$ext->init();
+		}
+	}
+
+	/**
+	 * Enable a list of extensions.
+	 *
+	 * @param $ext_list the names of extensions we want to load.
+	 */
+	public static function enableByList($ext_list) {
+		foreach ($ext_list as $ext_name) {
+			self::enable($ext_name);
+		}
+	}
+
+	/**
+	 * Return a list of extensions.
+	 *
+	 * @param $only_enabled if true returns only the enabled extensions (false by default).
+	 * @return an array of extensions.
+	 */
+	public static function listExtensions($only_enabled = false) {
+		if ($only_enabled) {
+			return self::$ext_list_enabled;
+		} else {
+			return self::$ext_list;
+		}
+	}
+
+	/**
+	 * Return an extension by its name.
+	 *
+	 * @param $ext_name the name of the extension.
+	 * @return the corresponding extension or null if it doesn't exist.
+	 */
+	public static function findExtension($ext_name) {
+		if (!isset(self::$ext_list[$ext_name])) {
+			return null;
+		}
+
+		return self::$ext_list[$ext_name];
+	}
+
+	/**
+	 * Add a hook function to a given hook.
+	 *
+	 * The hook name must be a valid one. For the valid list, see self::$hook_list
+	 * array keys.
+	 *
+	 * @param $hook_name the hook name (must exist).
+	 * @param $hook_function the function name to call (must be callable).
+	 * @param $ext the extension which register the hook.
+	 */
+	public static function addHook($hook_name, $hook_function, $ext) {
+		if (isset(self::$hook_list[$hook_name]) && is_callable($hook_function)) {
+			self::$hook_list[$hook_name]['list'][] = $hook_function;
+			self::$ext_to_hooks[$ext->getName()][] = $hook_name;
+		}
+	}
+
+	/**
+	 * Call functions related to a given hook.
+	 *
+	 * The hook name must be a valid one. For the valid list, see self::$hook_list
+	 * array keys.
+	 *
+	 * @param $hook_name the hook to call.
+	 * @param additionnal parameters (for signature, please see self::$hook_list).
+	 * @return the final result of the called hook.
+	 */
+	public static function callHook($hook_name) {
+		if (!isset(self::$hook_list[$hook_name])) {
+			return;
+		}
+
+		$signature = self::$hook_list[$hook_name]['signature'];
+		$signature = 'self::call' . $signature;
+		$args = func_get_args();
+
+		return call_user_func_array($signature, $args);
+	}
+
+	/**
+	 * Call a hook which takes one argument and return a result.
+	 *
+	 * The result is chained between the extension, for instance, first extension
+	 * hook will receive the initial argument and return a result which will be
+	 * passed as an argument to the next extension hook and so on.
+	 *
+	 * If a hook return a null value, the method is stopped and return null.
+	 *
+	 * @param $hook_name is the hook to call.
+	 * @param $arg is the argument to pass to the first extension hook.
+	 * @return the final chained result of the hooks. If nothing is changed,
+	 *         the initial argument is returned.
+	 */
+	private static function callOneToOne($hook_name, $arg) {
+		$result = $arg;
+		foreach (self::$hook_list[$hook_name]['list'] as $function) {
+			$result = call_user_func($function, $arg);
+
+			if (is_null($result)) {
+				break;
+			}
+
+			$arg = $result;
+		}
+		return $result;
+	}
+
+	/**
+	 * Call a hook which takes no argument and returns nothing.
+	 *
+	 * This case is simpler than callOneToOne because hooks are called one by
+	 * one, without any consideration of argument nor result.
+	 *
+	 * @param $hook_name is the hook to call.
+	 */
+	private static function callNoneToNone($hook_name) {
+		foreach (self::$hook_list[$hook_name]['list'] as $function) {
+			call_user_func($function);
+		}
+	}
+}
diff --git a/lib/Minz/FrontController.php b/lib/Minz/FrontController.php
index 80eda8877..f9eff3db6 100644
--- a/lib/Minz/FrontController.php
+++ b/lib/Minz/FrontController.php
@@ -24,50 +24,67 @@
  */
 class Minz_FrontController {
 	protected $dispatcher;
-	protected $router;
-
-	private $useOb = true;
 
 	/**
 	 * Constructeur
-	 * Initialise le router et le dispatcher
+	 * Initialise le dispatcher, met à jour la Request
 	 */
 	public function __construct () {
-		if (LOG_PATH === false) {
-			$this->killApp ('Path not found: LOG_PATH');
-		}
-
 		try {
-			Minz_Configuration::init ();
+			Minz_Configuration::register('system',
+			                             DATA_PATH . '/config.php',
+			                             DATA_PATH . '/config.default.php');
+			$this->setReporting();
 
-			Minz_Request::init ();
+			Minz_Request::init();
 
-			$this->router = new Minz_Router ();
-			$this->router->init ();
-		} catch (Minz_RouteNotFoundException $e) {
-			Minz_Log::record ($e->getMessage (), Minz_Log::ERROR);
-			Minz_Error::error (
-				404,
-				array ('error' => array ($e->getMessage ()))
+			$url = $this->buildUrl();
+			$url['params'] = array_merge (
+				$url['params'],
+				Minz_Request::fetchPOST ()
 			);
+			Minz_Request::forward ($url);
 		} catch (Minz_Exception $e) {
-			Minz_Log::record ($e->getMessage (), Minz_Log::ERROR);
+			Minz_Log::error($e->getMessage());
 			$this->killApp ($e->getMessage ());
 		}
 
-		$this->dispatcher = Minz_Dispatcher::getInstance ($this->router);
+		$this->dispatcher = Minz_Dispatcher::getInstance();
 	}
 
 	/**
-	 * Démarre l'application (lance le dispatcher et renvoie la réponse
+	 * Retourne un tableau représentant l'url passée par la barre d'adresses
+	 * @return tableau représentant l'url
+	 */
+	private function buildUrl() {
+		$url = array ();
+
+		$url['c'] = Minz_Request::fetchGET (
+			'c',
+			Minz_Request::defaultControllerName ()
+		);
+		$url['a'] = Minz_Request::fetchGET (
+			'a',
+			Minz_Request::defaultActionName ()
+		);
+		$url['params'] = Minz_Request::fetchGET ();
+
+		// post-traitement
+		unset ($url['params']['c']);
+		unset ($url['params']['a']);
+
+		return $url;
+	}
+
+	/**
+	 * Démarre l'application (lance le dispatcher et renvoie la réponse)
 	 */
 	public function run () {
 		try {
-			$this->dispatcher->run ($this->useOb);
-			Minz_Response::send ();
+			$this->dispatcher->run();
 		} catch (Minz_Exception $e) {
 			try {
-				Minz_Log::record ($e->getMessage (), Minz_Log::ERROR);
+				Minz_Log::error($e->getMessage());
 			} catch (Minz_PermissionDeniedException $e) {
 				$this->killApp ($e->getMessage ());
 			}
@@ -97,14 +114,22 @@ class Minz_FrontController {
 		exit ('### Application problem ###<br />'."\n".$txt);
 	}
 
-	public function useOb() {
-		return $this->useOb;
-	}
-
-	/**
-	 * Use ob_start('ob_gzhandler') or not.
-	 */
-	public function _useOb($ob) {
-		return $this->useOb = (bool)$ob;
+	private function setReporting() {
+		$conf = Minz_Configuration::get('system');
+		switch($conf->environment) {
+		case 'production':
+			error_reporting(E_ALL);
+			ini_set('display_errors','Off');
+			ini_set('log_errors', 'On');
+			break;
+		case 'development':
+			error_reporting(E_ALL);
+			ini_set('display_errors','On');
+			ini_set('log_errors', 'On');
+			break;
+		case 'silent':
+			error_reporting(0);
+			break;
+		}
 	}
 }
diff --git a/lib/Minz/Helper.php b/lib/Minz/Helper.php
index b058211d3..f4a547c4e 100644
--- a/lib/Minz/Helper.php
+++ b/lib/Minz/Helper.php
@@ -12,11 +12,22 @@ class Minz_Helper {
 	 * Annule les effets des magic_quotes pour une variable donnée
 	 * @param $var variable à traiter (tableau ou simple variable)
 	 */
-	public static function stripslashes_r ($var) {
-		if (is_array ($var)){
-			return array_map (array ('Helper', 'stripslashes_r'), $var);
+	public static function stripslashes_r($var) {
+		if (is_array($var)){
+			return array_map(array('Minz_Helper', 'stripslashes_r'), $var);
 		} else {
 			return stripslashes($var);
 		}
 	}
+
+	/**
+	 * Wrapper for htmlspecialchars.
+	 * Force UTf-8 value and can be used on array too.
+	 */
+	public static function htmlspecialchars_utf8($var) {
+		if (is_array($var)) {
+			return array_map(array('Minz_Helper', 'htmlspecialchars_utf8'), $var);
+		}
+		return htmlspecialchars($var, ENT_COMPAT, 'UTF-8');
+	}
 }
diff --git a/lib/Minz/Log.php b/lib/Minz/Log.php
index e710aad4a..9559a0bd4 100644
--- a/lib/Minz/Log.php
+++ b/lib/Minz/Log.php
@@ -28,16 +28,25 @@ class Minz_Log {
 	 * 	- level = NOTICE et environment = PRODUCTION
 	 * @param $information message d'erreur / information à enregistrer
 	 * @param $level niveau d'erreur
-	 * @param $file_name fichier de log, par défaut LOG_PATH/application.log
+	 * @param $file_name fichier de log
 	 */
 	public static function record ($information, $level, $file_name = null) {
-		$env = Minz_Configuration::environment ();
+		try {
+			$conf = Minz_Configuration::get('system');
+			$env = $conf->environment;
+		} catch (Minz_ConfigurationException $e) {
+			$env = 'production';
+		}
 
-		if (! ($env === Minz_Configuration::SILENT
-		       || ($env === Minz_Configuration::PRODUCTION
+		if (! ($env === 'silent'
+		       || ($env === 'production'
 		       && ($level >= Minz_Log::NOTICE)))) {
 			if ($file_name === null) {
-				$file_name = LOG_PATH . '/' . Minz_Session::param('currentUser', '_') . '.log';
+				$username = Minz_Session::param('currentUser', '');
+				if ($username == '') {
+					$username = '_';
+				}
+				$file_name = join_path(USERS_PATH, $username, 'log.txt');
 			}
 
 			switch ($level) {
@@ -71,7 +80,7 @@ class Minz_Log {
 	 * Automatise le log des variables globales $_GET et $_POST
 	 * Fait appel à la fonction record(...)
 	 * Ne fonctionne qu'en environnement "development"
-	 * @param $file_name fichier de log, par défaut LOG_PATH/application.log
+	 * @param $file_name fichier de log
 	 */
 	public static function recordRequest($file_name = null) {
 		$msg_get = str_replace("\n", '', '$_GET content : ' . print_r($_GET, true));
@@ -80,4 +89,21 @@ class Minz_Log {
 		self::record($msg_get, Minz_Log::DEBUG, $file_name);
 		self::record($msg_post, Minz_Log::DEBUG, $file_name);
 	}
+
+	/**
+	 * Some helpers to Minz_Log::record() method
+	 * Parameters are the same of those of the record() method.
+	 */
+	public static function debug($msg, $file_name = null) {
+		self::record($msg, Minz_Log::DEBUG, $file_name);
+	}
+	public static function notice($msg, $file_name = null) {
+		self::record($msg, Minz_Log::NOTICE, $file_name);
+	}
+	public static function warning($msg, $file_name = null) {
+		self::record($msg, Minz_Log::WARNING, $file_name);
+	}
+	public static function error($msg, $file_name = null) {
+		self::record($msg, Minz_Log::ERROR, $file_name);
+	}
 }
diff --git a/lib/Minz/ModelPdo.php b/lib/Minz/ModelPdo.php
index 831df13a2..caab1d114 100644
--- a/lib/Minz/ModelPdo.php
+++ b/lib/Minz/ModelPdo.php
@@ -16,54 +16,83 @@ class Minz_ModelPdo {
 	public static $useSharedBd = true;
 	private static $sharedBd = null;
 	private static $sharedPrefix;
+	private static $sharedCurrentUser;
+	protected static $sharedDbType;
 
 	/**
 	 * $bd variable représentant la base de données
 	 */
 	protected $bd;
 
+	protected $current_user;
 	protected $prefix;
 
+	public function dbType() {
+		return self::$sharedDbType;
+	}
+
 	/**
 	 * Créé la connexion à la base de données à l'aide des variables
 	 * HOST, BASE, USER et PASS définies dans le fichier de configuration
 	 */
-	public function __construct () {
-		if (self::$useSharedBd && self::$sharedBd != null) {
+	public function __construct($currentUser = null) {
+		if ($currentUser === null) {
+			$currentUser = Minz_Session::param('currentUser');
+		}
+		if (self::$useSharedBd && self::$sharedBd != null && 
+			($currentUser == null || $currentUser === self::$sharedCurrentUser)) {
 			$this->bd = self::$sharedBd;
 			$this->prefix = self::$sharedPrefix;
+			$this->current_user = self::$sharedCurrentUser;
 			return;
 		}
+		$this->current_user = $currentUser;
+		self::$sharedCurrentUser = $currentUser;
+
+		$conf = Minz_Configuration::get('system');
+		$db = $conf->db;
 
-		$db = Minz_Configuration::dataBase ();
-		$driver_options = null;
+		$driver_options = isset($conf->db['pdo_options']) && is_array($conf->db['pdo_options']) ? $conf->db['pdo_options'] : array();
+		$dbServer = parse_url('db://' . $db['host']);
 
 		try {
-			$type = $db['type'];
-			if($type == 'mysql') {
-				$string = $type
-				        . ':host=' . $db['host']
-				        . ';dbname=' . $db['base']
-				        . ';charset=utf8';
-				$driver_options = array(
-					PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8'
-				);
-			} elseif($type == 'sqlite') {
-				$string = $type . ':/' . DATA_PATH . $db['base'] . '.sqlite';	//TODO: DEBUG UTF-8 http://www.siteduzero.com/forum/sujet/sqlite-connexion-utf-8-18797
+			switch ($db['type']) {
+				case 'mysql':
+					$string = 'mysql:host=' . $dbServer['host'] . ';dbname=' . $db['base'] . ';charset=utf8mb4';
+					if (!empty($dbServer['port'])) {
+						$string .= ';port=' . $dbServer['port'];
+					}
+					$driver_options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES utf8mb4';
+					$this->prefix = $db['prefix'] . $currentUser . '_';
+					$this->bd = new MinzPDOMySql($string, $db['user'], $db['password'], $driver_options);
+					break;
+				case 'sqlite':
+					$string = 'sqlite:' . join_path(DATA_PATH, 'users', $currentUser, 'db.sqlite');
+					$this->prefix = '';
+					$this->bd = new MinzPDOMSQLite($string, $db['user'], $db['password'], $driver_options);
+					$this->bd->exec('PRAGMA foreign_keys = ON;');
+					break;
+				case 'pgsql':
+					$string = 'pgsql:host=' . $dbServer['host'] . ';dbname=' . $db['base'];
+					if (!empty($dbServer['port'])) {
+						$string .= ';port=' . $dbServer['port'];
+					}
+					$this->prefix = $db['prefix'] . $currentUser . '_';
+					$this->bd = new MinzPDOPGSQL($string, $db['user'], $db['password'], $driver_options);
+					$this->bd->exec("SET NAMES 'UTF8';");
+					break;
+				default:
+					throw new Minz_PDOConnectionException(
+						'Invalid database type!',
+						$db['user'], Minz_Exception::ERROR
+					);
+					break;
 			}
-
-			$this->bd = new FreshPDO (
-				$string,
-				$db['user'],
-				$db['password'],
-				$driver_options
-			);
 			self::$sharedBd = $this->bd;
-
-			$this->prefix = $db['prefix'] . Minz_Session::param('currentUser', '_') . '_';
+			self::$sharedDbType = $db['type'];
 			self::$sharedPrefix = $this->prefix;
 		} catch (Exception $e) {
-			throw new Minz_PDOConnectionException (
+			throw new Minz_PDOConnectionException(
 				$string,
 				$db['user'], Minz_Exception::ERROR
 			);
@@ -73,6 +102,9 @@ class Minz_ModelPdo {
 	public function beginTransaction() {
 		$this->bd->beginTransaction();
 	}
+	public function inTransaction() {
+		return $this->bd->inTransaction();	//requires PHP >= 5.3.3
+	}
 	public function commit() {
 		$this->bd->commit();
 	}
@@ -80,40 +112,62 @@ class Minz_ModelPdo {
 		$this->bd->rollBack();
 	}
 
-	public function size($all = false) {
-		$db = Minz_Configuration::dataBase ();
-		$sql = 'SELECT SUM(data_length + index_length) FROM information_schema.TABLES WHERE table_schema = ?';
-		$values = array ($db['base']);
-		if (!$all) {
-			$sql .= ' AND table_name LIKE ?';
-			$values[] = $this->prefix . '%';
-		}
-		$stm = $this->bd->prepare ($sql);
-		$stm->execute ($values);
-		$res = $stm->fetchAll(PDO::FETCH_COLUMN, 0);
-		return $res[0];
-	}
-
 	public static function clean() {
 		self::$sharedBd = null;
 		self::$sharedPrefix = '';
 	}
+
+	public function disableBuffering() {
+		if ((self::$sharedDbType === 'mysql') && defined('PDO::MYSQL_ATTR_USE_BUFFERED_QUERY')) {
+			$this->bd->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, false);
+		}
+	}
 }
 
-class FreshPDO extends PDO {
+class MinzPDO extends PDO {
 	private static function check($statement) {
 		if (preg_match('/^(?:UPDATE|INSERT|DELETE)/i', $statement)) {
 			invalidateHttpCache();
 		}
 	}
 
-	public function prepare ($statement, $driver_options = array()) {
-		FreshPDO::check($statement);
+	protected function compatibility($statement) {
+		return $statement;
+	}
+
+	public function prepare($statement, $driver_options = array()) {
+		MinzPDO::check($statement);
+		$statement = $this->compatibility($statement);
 		return parent::prepare($statement, $driver_options);
 	}
 
-	public function exec ($statement) {
-		FreshPDO::check($statement);
+	public function exec($statement) {
+		MinzPDO::check($statement);
+		$statement = $this->compatibility($statement);
 		return parent::exec($statement);
 	}
+
+	public function query($statement) {
+		MinzPDO::check($statement);
+		$statement = $this->compatibility($statement);
+		return parent::query($statement);
+	}
+}
+
+class MinzPDOMySql extends MinzPDO {
+	public function lastInsertId($name = null) {
+		return parent::lastInsertId();	//We discard the name, only used by PostgreSQL
+	}
+}
+
+class MinzPDOMSQLite extends MinzPDO {
+	public function lastInsertId($name = null) {
+		return parent::lastInsertId();	//We discard the name, only used by PostgreSQL
+	}
+}
+
+class MinzPDOPGSQL extends MinzPDO {
+	protected function compatibility($statement) {
+		return str_replace(array('`', ' LIKE '), array('"', ' ILIKE '), $statement);
+	}
 }
diff --git a/lib/Minz/Request.php b/lib/Minz/Request.php
index 282d47a77..f80b707d6 100644
--- a/lib/Minz/Request.php
+++ b/lib/Minz/Request.php
@@ -10,68 +10,68 @@
 class Minz_Request {
 	private static $controller_name = '';
 	private static $action_name = '';
-	private static $params = array ();
+	private static $params = array();
 
 	private static $default_controller_name = 'index';
 	private static $default_action_name = 'index';
 
-	public static $reseted = true;
-
 	/**
 	 * Getteurs
 	 */
-	public static function controllerName () {
+	public static function controllerName() {
 		return self::$controller_name;
 	}
-	public static function actionName () {
+	public static function actionName() {
 		return self::$action_name;
 	}
-	public static function params () {
+	public static function params() {
 		return self::$params;
 	}
-	static function htmlspecialchars_utf8 ($p) {
-		return htmlspecialchars($p, ENT_COMPAT, 'UTF-8');
-	}
-	public static function param ($key, $default = false, $specialchars = false) {
-		if (isset (self::$params[$key])) {
+	public static function param($key, $default = false, $specialchars = false) {
+		if (isset(self::$params[$key])) {
 			$p = self::$params[$key];
-			if(is_object($p) || $specialchars) {
+			if (is_object($p) || $specialchars) {
 				return $p;
-			} elseif(is_array($p)) {
-				return array_map('self::htmlspecialchars_utf8', $p);
 			} else {
-				return self::htmlspecialchars_utf8($p);
+				return Minz_Helper::htmlspecialchars_utf8($p);
 			}
 		} else {
 			return $default;
 		}
 	}
-	public static function defaultControllerName () {
+	public static function defaultControllerName() {
 		return self::$default_controller_name;
 	}
-	public static function defaultActionName () {
+	public static function defaultActionName() {
 		return self::$default_action_name;
 	}
+	public static function currentRequest() {
+		return array(
+			'c' => self::$controller_name,
+			'a' => self::$action_name,
+			'params' => self::$params,
+		);
+	}
 
 	/**
 	 * Setteurs
 	 */
-	public static function _controllerName ($controller_name) {
+	public static function _controllerName($controller_name) {
 		self::$controller_name = $controller_name;
 	}
-	public static function _actionName ($action_name) {
+	public static function _actionName($action_name) {
 		self::$action_name = $action_name;
 	}
-	public static function _params ($params) {
+	public static function _params($params) {
 		if (!is_array($params)) {
-			$params = array ($params);
+			$params = array($params);
 		}
 
 		self::$params = $params;
 	}
-	public static function _param ($key, $value = false) {
+	public static function _param($key, $value = false) {
 		if ($value === false) {
-			unset (self::$params[$key]);
+			unset(self::$params[$key]);
 		} else {
 			self::$params[$key] = $value;
 		}
@@ -80,48 +80,69 @@ class Minz_Request {
 	/**
 	 * Initialise la Request
 	 */
-	public static function init () {
-		self::magicQuotesOff ();
+	public static function init() {
+		self::magicQuotesOff();
 	}
 
 	/**
-	 * Retourn le nom de domaine du site
+	 * Return true if the request is over HTTPS, false otherwise (HTTP)
 	 */
-	public static function getDomainName () {
-		return $_SERVER['HTTP_HOST'];
+	public static function isHttps() {
+		if (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
+			return strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']) === 'https';
+		} else {
+			return isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on';
+		}
 	}
 
 	/**
-	 * Détermine la base de l'url
-	 * @return la base de l'url
+	 * Try to guess the base URL from $_SERVER information
+	 *
+	 * @return the base url (e.g. http://example.com/)
 	 */
-	public static function getBaseUrl () {
-		$defaultBaseUrl = Minz_Configuration::baseUrl();
-		if (!empty($defaultBaseUrl)) {
-			return $defaultBaseUrl;
-		} elseif (isset($_SERVER['REQUEST_URI'])) {
-			return dirname($_SERVER['REQUEST_URI']) . '/';
+	public static function guessBaseUrl() {
+		$url = 'http';
+
+		$https = self::isHttps();
+
+		if (!empty($_SERVER['HTTP_HOST'])) {
+			$host = $_SERVER['HTTP_HOST'];
+		} elseif (!empty($_SERVER['SERVER_NAME'])) {
+			$host = $_SERVER['SERVER_NAME'];
 		} else {
-			return '/';
+			$host = 'localhost';
 		}
-	}
 
-	/**
-	 * Récupère l'URI de la requête
-	 * @return l'URI
-	 */
-	public static function getURI () {
-		if (isset ($_SERVER['REQUEST_URI'])) {
-			$base_url = self::getBaseUrl ();
-			$uri = $_SERVER['REQUEST_URI'];
+		if (!empty($_SERVER['HTTP_X_FORWARDED_PORT'])) {
+			$port = intval($_SERVER['HTTP_X_FORWARDED_PORT']);
+		} elseif (!empty($_SERVER['SERVER_PORT'])) {
+			$port = intval($_SERVER['SERVER_PORT']);
+		} else {
+			$port = $https ? 443 : 80;
+		}
 
-			$len_base_url = strlen ($base_url);
-			$real_uri = substr ($uri, $len_base_url);
+		if ($https) {
+			$url .= 's://' . $host . ($port == 443 ? '' : ':' . $port);
 		} else {
-			$real_uri = '';
+			$url .= '://' . $host . ($port == 80 ? '' : ':' . $port);
 		}
+		if (isset($_SERVER['REQUEST_URI'])) {
+			$path = $_SERVER['REQUEST_URI'];
+			$url .= substr($path, -1) === '/' ? substr($path, 0, -1) : dirname($path);
+		}
+
+		return filter_var($url, FILTER_SANITIZE_URL);
+	}
 
-		return $real_uri;
+	/**
+	 * Return the base_url from configuration and add a suffix if given.
+	 *
+	 * @return the base_url with a suffix.
+	 */
+	public static function getBaseUrl() {
+		$conf = Minz_Configuration::get('system');
+		$url = rtrim($conf->base_url, '/\\');
+		return filter_var($url, FILTER_SANITIZE_URL);
 	}
 
 	/**
@@ -130,24 +151,53 @@ class Minz_Request {
 	 * @param $redirect si vrai, force la redirection http
 	 *                > sinon, le dispatcher recharge en interne
 	 */
-	public static function forward ($url = array (), $redirect = false) {
-		$url = Minz_Url::checkUrl ($url);
+	public static function forward($url = array(), $redirect = false) {
+		if (!is_array($url)) {
+			header('Location: ' . $url);
+			exit();
+		}
+
+		$url = Minz_Url::checkUrl($url);
 
 		if ($redirect) {
-			header ('Location: ' . Minz_Url::display ($url, 'php'));
-			exit ();
+			header('Location: ' . Minz_Url::display($url, 'php'));
+			exit();
 		} else {
-			self::$reseted = true;
-
-			self::_controllerName ($url['c']);
-			self::_actionName ($url['a']);
-			self::_params (array_merge (
+			self::_controllerName($url['c']);
+			self::_actionName($url['a']);
+			self::_params(array_merge(
 				self::$params,
 				$url['params']
 			));
+			Minz_Dispatcher::reset();
 		}
 	}
 
+
+	/**
+	 * Wrappers good notifications + redirection
+	 * @param $msg notification content
+	 * @param $url url array to where we should be forwarded
+	 */
+	public static function good($msg, $url = array()) {
+		Minz_Session::_param('notification', array(
+			'type' => 'good',
+			'content' => $msg
+		));
+
+		Minz_Request::forward($url, true);
+	}
+
+	public static function bad($msg, $url = array()) {
+		Minz_Session::_param('notification', array(
+			'type' => 'bad',
+			'content' => $msg
+		));
+
+		Minz_Request::forward($url, true);
+	}
+
+
 	/**
 	 * Permet de récupérer une variable de type $_GET
 	 * @param $param nom de la variable
@@ -156,10 +206,10 @@ class Minz_Request {
 	 *         $_GET si $param = false
 	 *         $default si $_GET[$param] n'existe pas
 	 */
-	public static function fetchGET ($param = false, $default = false) {
+	public static function fetchGET($param = false, $default = false) {
 		if ($param === false) {
 			return $_GET;
-		} elseif (isset ($_GET[$param])) {
+		} elseif (isset($_GET[$param])) {
 			return $_GET[$param];
 		} else {
 			return $default;
@@ -174,10 +224,10 @@ class Minz_Request {
 	 *         $_POST si $param = false
 	 *         $default si $_POST[$param] n'existe pas
 	 */
-	public static function fetchPOST ($param = false, $default = false) {
+	public static function fetchPOST($param = false, $default = false) {
 		if ($param === false) {
 			return $_POST;
-		} elseif (isset ($_POST[$param])) {
+		} elseif (isset($_POST[$param])) {
 			return $_POST[$param];
 		} else {
 			return $default;
@@ -190,15 +240,16 @@ class Minz_Request {
 	 *   $_POST
 	 *   $_COOKIE
 	 */
-	private static function magicQuotesOff () {
-		if (get_magic_quotes_gpc ()) {
-			$_GET = Minz_Helper::stripslashes_r ($_GET);
-			$_POST = Minz_Helper::stripslashes_r ($_POST);
-			$_COOKIE = Minz_Helper::stripslashes_r ($_COOKIE);
+	private static function magicQuotesOff() {
+		if (get_magic_quotes_gpc()) {
+			$_GET = Minz_Helper::stripslashes_r($_GET);
+			$_POST = Minz_Helper::stripslashes_r($_POST);
+			$_COOKIE = Minz_Helper::stripslashes_r($_COOKIE);
 		}
 	}
 
-	public static function isPost () {
-		return $_SERVER['REQUEST_METHOD'] === 'POST';
+	public static function isPost() {
+		return isset($_SERVER['REQUEST_METHOD']) &&
+			$_SERVER['REQUEST_METHOD'] === 'POST';
 	}
 }
diff --git a/lib/Minz/Response.php b/lib/Minz/Response.php
deleted file mode 100644
index f8ea3d946..000000000
--- a/lib/Minz/Response.php
+++ /dev/null
@@ -1,60 +0,0 @@
-<?php
-/** 
- * MINZ - Copyright 2011 Marien Fressinaud
- * Sous licence AGPL3 <http://www.gnu.org/licenses/>
-*/
-
-/**
- * Response représente la requête http renvoyée à l'utilisateur
- */
-class Minz_Response {
-	private static $header = 'HTTP/1.0 200 OK';
-	private static $body = '';
-	
-	/**
-	 * Mets à jour le body de la Response
-	 * @param $text le texte à incorporer dans le body
-	 */
-	public static function setBody ($text) {
-		self::$body = $text;
-	}
-	
-	/**
-	 * Mets à jour le header de la Response
-	 * @param $code le code HTTP, valeurs possibles
-	 *	- 200 (OK)
-	 *	- 403 (Forbidden)
-	 *	- 404 (Forbidden)
-	 *	- 500 (Forbidden) -> par défaut si $code erroné
-	 *	- 503 (Forbidden)
-	 */
-	public static function setHeader ($code) {
-		switch ($code) {
-		case 200 :
-			self::$header = 'HTTP/1.0 200 OK';
-			break;
-		case 403 :
-			self::$header = 'HTTP/1.0 403 Forbidden';
-			break;
-		case 404 :
-			self::$header = 'HTTP/1.0 404 Not Found';
-			break;
-		case 500 :
-			self::$header = 'HTTP/1.0 500 Internal Server Error';
-			break;
-		case 503 :
-			self::$header = 'HTTP/1.0 503 Service Unavailable';
-			break;
-		default :
-			self::$header = 'HTTP/1.0 500 Internal Server Error';
-		}
-	}
-
-	/**
-	 * Envoie la Response à l'utilisateur
-	 */
-	public static function send () {
-		header (self::$header);
-		echo self::$body;
-	}
-}
diff --git a/lib/Minz/RouteNotFoundException.php b/lib/Minz/RouteNotFoundException.php
deleted file mode 100644
index dc4f6fbad..000000000
--- a/lib/Minz/RouteNotFoundException.php
+++ /dev/null
@@ -1,16 +0,0 @@
-<?php
-class Minz_RouteNotFoundException extends Minz_Exception {
-	private $route;
-	
-	public function __construct ($route, $code = self::ERROR) {
-		$this->route = $route;
-		
-		$message = 'Route `' . $route . '` not found';
-		
-		parent::__construct ($message, $code);
-	}
-	
-	public function route () {
-		return $this->route;
-	}
-}
diff --git a/lib/Minz/Router.php b/lib/Minz/Router.php
deleted file mode 100644
index 1ccd72597..000000000
--- a/lib/Minz/Router.php
+++ /dev/null
@@ -1,209 +0,0 @@
-<?php
-/** 
- * MINZ - Copyright 2011 Marien Fressinaud
- * Sous licence AGPL3 <http://www.gnu.org/licenses/>
-*/
-
-/**
- * La classe Router gère le routage de l'application
- * Les routes sont définies dans APP_PATH.'/configuration/routes.php'
- */
-class Minz_Router {
-	const ROUTES_PATH_NAME = '/configuration/routes.php';
-
-	private $routes = array ();
-	
-	/**
-	 * Constructeur
-	 * @exception FileNotExistException si ROUTES_PATH_NAME n'existe pas
-	 *            et que l'on utilise l'url rewriting
-	 */
-	public function __construct () {
-		if (Minz_Configuration::useUrlRewriting ()) {
-			if (file_exists (APP_PATH . self::ROUTES_PATH_NAME)) {
-				$routes = include (
-					APP_PATH . self::ROUTES_PATH_NAME
-				);
-		
-				if (!is_array ($routes)) {
-					$routes = array ();
-				}
-				
-				$this->routes = array_map (
-					array ('Url', 'checkUrl'),
-					$routes
-				);
-			} else {
-				throw new Minz_FileNotExistException (
-					self::ROUTES_PATH_NAME,
-					Minz_Exception::ERROR
-				);
-			}
-		}
-	}
-	
-	/**
-	 * Initialise le Router en déterminant le couple Controller / Action
-	 * Mets à jour la Request
-	 * @exception RouteNotFoundException si l'uri n'est pas présente dans
-	 *          > la table de routage
-	 */
-	public function init () {
-		$url = array ();
-		
-		if (Minz_Configuration::useUrlRewriting ()) {
-			try {
-				$url = $this->buildWithRewriting ();
-			} catch (Minz_RouteNotFoundException $e) {
-				throw $e;
-			}
-		} else {
-			$url = $this->buildWithoutRewriting ();
-		}
-		
-		$url['params'] = array_merge (
-			$url['params'],
-			Minz_Request::fetchPOST ()
-		);
-		
-		Minz_Request::forward ($url);
-	}
-	
-	/**
-	 * Retourne un tableau représentant l'url passée par la barre d'adresses
-	 * Ne se base PAS sur la table de routage
-	 * @return tableau représentant l'url
-	 */
-	public function buildWithoutRewriting () {
-		$url = array ();
-		
-		$url['c'] = Minz_Request::fetchGET (
-			'c',
-			Minz_Request::defaultControllerName ()
-		);
-		$url['a'] = Minz_Request::fetchGET (
-			'a',
-			Minz_Request::defaultActionName ()
-		);
-		$url['params'] = Minz_Request::fetchGET ();
-		
-		// post-traitement
-		unset ($url['params']['c']);
-		unset ($url['params']['a']);
-		
-		return $url;
-	}
-	
-	/**
-	 * Retourne un tableau représentant l'url passée par la barre d'adresses
-	 * Se base sur la table de routage
-	 * @return tableau représentant l'url
-	 * @exception RouteNotFoundException si l'uri n'est pas présente dans
-	 *          > la table de routage
-	 */
-	public function buildWithRewriting () {
-		$url = array ();
-		$uri = Minz_Request::getURI ();
-		$find = false;
-		
-		foreach ($this->routes as $route) {
-			$regex = '*^' . $route['route'] . '$*';
-			if (preg_match ($regex, $uri, $matches)) {
-				$url['c'] = $route['controller'];
-				$url['a'] = $route['action'];
-				$url['params'] = $this->getParams (
-					$route['params'],
-					$matches
-				);
-				$find = true;
-				break;
-			}
-		}
-		
-		if (!$find && $uri != '/') {
-			throw new Minz_RouteNotFoundException (
-				$uri,
-				Minz_Exception::ERROR
-			);
-		}
-		
-		// post-traitement
-		$url = Minz_Url::checkUrl ($url);
-		
-		return $url;
-	}
-	
-	/**
-	 * Retourne l'uri d'une url en se basant sur la table de routage
-	 * @param l'url sous forme de tableau
-	 * @return l'uri formatée (string) selon une route trouvée
-	 */
-	public function printUriRewrited ($url) {
-		$route = $this->searchRoute ($url);
-		
-		if ($route !== false) {
-			return $this->replaceParams ($route, $url['params']);
-		}
-		
-		return '';
-	}
-	
-	/**
-	 * Recherche la route correspondante à une url
-	 * @param l'url sous forme de tableau
-	 * @return la route telle que spécifiée dans la table de routage,
-	 *         false si pas trouvée
-	 */
-	public function searchRoute ($url) {
-		foreach ($this->routes as $route) {
-			if ($route['controller'] == $url['c']
-			 && $route['action'] == $url['a']) {
-				// calcule la différence des tableaux de params
-				$params = array_flip ($route['params']);
-				$difference_params = array_diff_key (
-					$params,
-					$url['params']
-				);
-				
-				// vérifie que pas de différence
-				// et le cas où $params est vide et pas $url['params']
-				if (empty ($difference_params)
-				&& (!empty ($params) || empty ($url['params']))) {
-					return $route;
-				}
-			}
-		}
-		
-		return false;
-	}
-	
-	/**
-	 * Récupère un tableau dont
-	 * 	- les clés sont définies dans $params_route
-	 *	- les valeurs sont situées dans $matches
-	 * Le tableau $matches est décalé de +1 par rapport à $params_route
-	 */
-	private function getParams($params_route, $matches) {
-		$params = array ();
-		
-		for ($i = 0; $i < count ($params_route); $i++) {
-			$param = $params_route[$i];
-			$params[$param] = $matches[$i + 1];
-		}
-	
-		return $params;
-	}
-	
-	/**
-	 * Remplace les éléments de la route par les valeurs contenues dans $params
-	 */
-	private function replaceParams ($route, $params_replace) {
-		$uri = $route['route'];
-		$params = array();
-		foreach($route['params'] as $param) {
-			$uri = preg_replace('#\((.+)\)#U', $params_replace[$param], $uri, 1);
-		}
-
-		return stripslashes($uri);
-	 }
-}
diff --git a/lib/Minz/Session.php b/lib/Minz/Session.php
index ddabc4658..c94f2b646 100644
--- a/lib/Minz/Session.php
+++ b/lib/Minz/Session.php
@@ -2,28 +2,20 @@
 
 /**
  * La classe Session gère la session utilisateur
- * C'est un singleton
  */
 class Minz_Session {
 	/**
-	 * $session stocke les variables de session
-	 */
-	private static $session = array ();	//TODO: Try to avoid having another local copy
-
-	/**
 	 * Initialise la session, avec un nom
-	 * Le nom de session est utilisé comme nom pour les cookies et les URLs (i.e. PHPSESSID).
+	 * Le nom de session est utilisé comme nom pour les cookies et les URLs(i.e. PHPSESSID).
 	 * Il ne doit contenir que des caractères alphanumériques ; il doit être court et descriptif
 	 */
-	public static function init ($name) {
-		// démarre la session
-		session_name ($name);
-		session_set_cookie_params (0, dirname(empty($_SERVER['REQUEST_URI']) ? '/' : dirname($_SERVER['REQUEST_URI'])), null, false, true);
-		session_start ();
+	public static function init($name) {
+		$cookie = session_get_cookie_params();
+		self::keepCookie($cookie['lifetime']);
 
-		if (isset ($_SESSION)) {
-			self::$session = $_SESSION;
-		}
+		// démarre la session
+		session_name($name);
+		session_start();
 	}
 
 
@@ -32,8 +24,8 @@ class Minz_Session {
 	 * @param $p le paramètre à récupérer
 	 * @return la valeur de la variable de session, false si n'existe pas
 	 */
-	public static function param ($p, $default = false) {
-		return isset(self::$session[$p]) ? self::$session[$p] : $default;
+	public static function param($p, $default = false) {
+		return isset($_SESSION[$p]) ? $_SESSION[$p] : $default;
 	}
 
 
@@ -42,13 +34,11 @@ class Minz_Session {
 	 * @param $p le paramètre à créer ou modifier
 	 * @param $v la valeur à attribuer, false pour supprimer
 	 */
-	public static function _param ($p, $v = false) {
+	public static function _param($p, $v = false) {
 		if ($v === false) {
-			unset ($_SESSION[$p]);
-			unset (self::$session[$p]);
+			unset($_SESSION[$p]);
 		} else {
 			$_SESSION[$p] = $v;
-			self::$session[$p] = $v;
 		}
 	}
 
@@ -57,15 +47,54 @@ class Minz_Session {
 	 * Permet d'effacer une session
 	 * @param $force si à false, n'efface pas le paramètre de langue
 	 */
-	public static function unset_session ($force = false) {
-		$language = self::param ('language');
+	public static function unset_session($force = false) {
+		$language = self::param('language');
 
 		session_destroy();
-		self::$session = array ();
+		$_SESSION = array();
 
 		if (!$force) {
-			self::_param ('language', $language);
-			Minz_Translate::reset ();
+			self::_param('language', $language);
+			Minz_Translate::reset($language);
 		}
 	}
+
+	public static function getCookieDir() {
+		// Get the script_name (e.g. /p/i/index.php) and keep only the path.
+		$cookie_dir = empty($_SERVER['REQUEST_URI']) ? '/' : $_SERVER['REQUEST_URI'];
+		if (substr($cookie_dir, -1) !== '/') {
+			$cookie_dir = dirname($cookie_dir) . '/';
+		}
+		return $cookie_dir;
+	}
+
+	/**
+	 * Spécifie la durée de vie des cookies
+	 * @param $l la durée de vie
+	 */
+	public static function keepCookie($l) {
+		session_set_cookie_params($l, self::getCookieDir(), '', Minz_Request::isHttps(), true);
+	}
+
+
+	/**
+	 * Régénère un id de session.
+	 * Utile pour appeler session_set_cookie_params après session_start()
+	 */
+	public static function regenerateID() {
+		session_regenerate_id(true);
+	}
+
+	public static function deleteLongTermCookie($name) {
+		setcookie($name, '', 1, '', '', Minz_Request::isHttps(), true);
+	}
+
+	public static function setLongTermCookie($name, $value, $expire) {
+		setcookie($name, $value, $expire, '', '', Minz_Request::isHttps(), true);
+	}
+
+	public static function getLongTermCookie($name) {
+		return isset($_COOKIE[$name]) ? $_COOKIE[$name] : null;
+	}
+
 }
diff --git a/lib/Minz/Translate.php b/lib/Minz/Translate.php
index e14f783f7..baddcb424 100644
--- a/lib/Minz/Translate.php
+++ b/lib/Minz/Translate.php
@@ -5,67 +5,226 @@
  */
 
 /**
- * La classe Translate se charge de la traduction
- * Utilise les fichiers du répertoire /app/i18n/
+ * This class is used for the internationalization.
+ * It uses files in `./app/i18n/`
  */
 class Minz_Translate {
 	/**
-	 * $language est la langue à afficher
+	 * $path_list is the list of registered base path to search translations.
 	 */
-	private static $language;
-	
+	private static $path_list = array();
+
+	/**
+	 * $lang_name is the name of the current language to use.
+	 */
+	private static $lang_name;
+
+	/**
+	 * $lang_files is a list of registered i18n files.
+	 */
+	private static $lang_files = array();
+
+	/**
+	 * $translates is a cache for i18n translation.
+	 */
+	private static $translates = array();
+
+	/**
+	 * Init the translation object.
+	 * @param $lang_name the lang to show.
+	 */
+	public static function init($lang_name = null) {
+		self::$lang_name = $lang_name;
+		self::$lang_files = array();
+		self::$translates = array();
+		self::registerPath(APP_PATH . '/i18n');
+		foreach (self::$path_list as $path) {
+			self::loadLang($path);
+		}
+	}
+
 	/**
-	 * $translates est le tableau de correspondance
-	 * 	$key => $traduction
+	 * Reset the translation object with a new language.
+	 * @param $lang_name the new language to use
 	 */
-	private static $translates = array ();
-	
+	public static function reset($lang_name) {
+		self::$lang_name = $lang_name;
+		self::$lang_files = array();
+		self::$translates = array();
+		foreach (self::$path_list as $path) {
+			self::loadLang($path);
+		}
+	}
+
 	/**
-	 * Inclus le fichier de langue qui va bien
-	 * l'enregistre dans $translates
+	 * Return the list of available languages.
+	 * @return an array containing langs found in different registered paths.
 	 */
-	public static function init () {
-		$l = Minz_Configuration::language ();
-		self::$language = Minz_Session::param ('language', $l);
-		
-		$l_path = APP_PATH . '/i18n/' . self::$language . '.php';
-		
-		if (file_exists ($l_path)) {
-			self::$translates = include ($l_path);
+	public static function availableLanguages() {
+		$list_langs = array();
+
+		foreach (self::$path_list as $path) {
+			$path_langs = array_values(array_diff(
+				scandir($path),
+				array('..', '.')
+			));
+
+			$list_langs = array_merge($list_langs, $path_langs);
 		}
+
+		return array_unique($list_langs);
 	}
-	
+
 	/**
-	 * Alias de init
+	 * Register a new path.
+	 * @param $path a path containing i18n directories (e.g. ./en/, ./fr/).
 	 */
-	public static function reset () {
-		self::init ();
+	public static function registerPath($path) {
+		if (in_array($path, self::$path_list)) {
+			return;
+		}
+
+		self::$path_list[] = $path;
+		self::loadLang($path);
 	}
-	
+
 	/**
-	 * Traduit une clé en sa valeur du tableau $translates
-	 * @param $key la clé à traduire
-	 * @return la valeur correspondante à la clé
-	 *       > si non présente dans le tableau, on retourne la clé elle-même
+	 * Load translations of the current language from the given path.
+	 * @param $path the path containing i18n directories.
+	 */
+	private static function loadLang($path) {
+		$lang_path = $path . '/' . self::$lang_name;
+		if (!file_exists($lang_path) || is_null(self::$lang_name)) {
+			// The lang path does not exist, nothing more to do.
+			return;
+		}
+
+		$list_i18n_files = array_values(array_diff(
+			scandir($lang_path),
+			array('..', '.')
+		));
+
+		// Each file basename correspond to a top-level i18n key. For each of
+		// these keys we store the file pathname and mark translations must be
+		// reloaded (by setting $translates[$i18n_key] to null).
+		foreach ($list_i18n_files as $i18n_filename) {
+			$i18n_key = basename($i18n_filename, '.php');
+			if (!isset(self::$lang_files[$i18n_key])) {
+				self::$lang_files[$i18n_key] = array();
+			}
+			self::$lang_files[$i18n_key][] = $lang_path . '/' . $i18n_filename;
+			self::$translates[$i18n_key] = null;
+		}
+	}
+
+	/**
+	 * Load the files associated to $key into $translates.
+	 * @param $key the top level i18n key we want to load.
+	 */
+	private static function loadKey($key) {
+		// The top level key is not in $lang_files, it means it does not exist!
+		if (!isset(self::$lang_files[$key])) {
+			Minz_Log::debug($key . ' is not a valid top level key');
+			return false;
+		}
+
+		self::$translates[$key] = array();
+
+		foreach (self::$lang_files[$key] as $lang_pathname) {
+			$i18n_array = include($lang_pathname);
+			if (!is_array($i18n_array)) {
+				Minz_Log::warning('`' . $lang_pathname . '` does not contain a PHP array');
+				continue;
+			}
+
+			// We must avoid to erase previous data so we just override them if
+			// needed.
+			self::$translates[$key] = array_replace_recursive(
+				self::$translates[$key], $i18n_array
+			);
+		}
+
+		return true;
+	}
+
+	/**
+	 * Translate a key into its corresponding value based on selected language.
+	 * @param $key the key to translate.
+	 * @param additional parameters for variable keys.
+	 * @return the value corresponding to the key.
+	 *         If no value is found, return the key itself.
 	 */ 
-	public static function t ($key) {
-		$translate = $key;
-		
-		if (isset (self::$translates[$key])) {
-			$translate = self::$translates[$key];
+	public static function t($key) {
+		$group = explode('.', $key);
+
+		if (count($group) < 2) {
+			Minz_Log::debug($key . ' is not in a valid format');
+			$top_level = 'gen';
+		} else {
+			$top_level = array_shift($group);
 		}
 
-		$args = func_get_args ();
+		// If $translates[$top_level] is null it means we have to load the
+		// corresponding files.
+		if (!isset(self::$translates[$top_level]) ||
+				is_null(self::$translates[$top_level])) {
+			$res = self::loadKey($top_level);
+			if (!$res) {
+				return $key;
+			}
+		}
+
+		// Go through the i18n keys to get the correct translation value.
+		$translates = self::$translates[$top_level];
+		$size_group = count($group);
+		$level_processed = 0;
+		$translation_value = $key;
+		foreach ($group as $i18n_level) {
+			$level_processed++;
+			if (!isset($translates[$i18n_level])) {
+				Minz_Log::debug($key . ' is not a valid key');
+				return $key;
+			}
+
+			if ($level_processed < $size_group) {
+				$translates = $translates[$i18n_level];
+			} else {
+				$translation_value = $translates[$i18n_level];
+			}
+		}
+
+		if (is_array($translation_value)) {
+			if (isset($translation_value['_'])) {
+				$translation_value = $translation_value['_'];
+			} else {
+				Minz_Log::debug($key . ' is not a valid key');
+				return $key;
+			}
+		}
+
+		// Get the facultative arguments to replace i18n variables.
+		$args = func_get_args();
 		unset($args[0]);
-		
-		return vsprintf ($translate, $args);
+
+		return vsprintf($translation_value, $args);
 	}
-	
+
 	/**
-	 * Retourne la langue utilisée actuellement
-	 * @return la langue
+	 * Return the current language.
 	 */
-	public static function language () {
-		return self::$language;
+	public static function language() {
+		return self::$lang_name;
 	}
 }
+
+
+/**
+ * Alias for Minz_Translate::t()
+ */
+function _t($key) {
+	$args = func_get_args();
+	unset($args[0]);
+	array_unshift($args, $key);
+
+	return call_user_func_array('Minz_Translate::t', $args);
+}
diff --git a/lib/Minz/Url.php b/lib/Minz/Url.php
index 17f1ddece..99c0443c1 100644
--- a/lib/Minz/Url.php
+++ b/lib/Minz/Url.php
@@ -5,13 +5,11 @@
  */
 class Minz_Url {
 	/**
-	 * Affiche une Url formatée selon que l'on utilise l'url_rewriting ou non
-	 * si oui, on cherche dans la table de routage la correspondance pour formater
+	 * Affiche une Url formatée
 	 * @param $url l'url à formater définie comme un tableau :
 	 *                    $url['c'] = controller
 	 *                    $url['a'] = action
 	 *                    $url['params'] = tableau des paramètres supplémentaires
-	 *                    $url['protocol'] = protocole à utiliser (http par défaut)
 	 *             ou comme une chaîne de caractère
 	 * @param $encodage pour indiquer comment encoder les & (& ou &amp; pour html)
 	 * @return l'url formatée
@@ -20,77 +18,77 @@ class Minz_Url {
 		$isArray = is_array($url);
 
 		if ($isArray) {
-			$url = self::checkUrl ($url);
+			$url = self::checkUrl($url);
 		}
 
 		$url_string = '';
 
 		if ($absolute) {
-			if ($isArray && isset ($url['protocol'])) {
-				$protocol = $url['protocol'];
-			} elseif (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on') {
-				$protocol = 'https:';
-			} else {
-				$protocol = 'http:';
+			$url_string = Minz_Request::getBaseUrl();
+			if ($url_string == '') {
+				$url_string = Minz_Request::guessBaseUrl();
+			}
+			if ($isArray) {
+				$url_string .= PUBLIC_TO_INDEX_PATH;
+			}
+			if ($absolute === 'root') {
+				$url_string = parse_url($url_string, PHP_URL_PATH);
 			}
-			$url_string = $protocol . '//' . Minz_Request::getDomainName () . Minz_Request::getBaseUrl ();
 		} else {
 			$url_string = $isArray ? '.' : PUBLIC_RELATIVE;
 		}
 
 		if ($isArray) {
-			$router = new Minz_Router ();
-
-			if (Minz_Configuration::useUrlRewriting ()) {
-				$url_string .= $router->printUriRewrited ($url);
-			} else {
-				$url_string .= self::printUri ($url, $encodage);
-			}
+			$url_string .= self::printUri($url, $encodage);
+		} elseif ($encodage === 'html') {
+			$url_string = Minz_Helper::htmlspecialchars_utf8($url_string . $url);
 		} else {
 			$url_string .= $url;
 		}
 
 		return $url_string;
 	}
-	
+
 	/**
-	 * Construit l'URI d'une URL sans url rewriting
+	 * Construit l'URI d'une URL
 	 * @param l'url sous forme de tableau
 	 * @param $encodage pour indiquer comment encoder les & (& ou &amp; pour html)
 	 * @return l'uri sous la forme ?key=value&key2=value2
 	 */
-	private static function printUri ($url, $encodage) {
+	private static function printUri($url, $encodage) {
 		$uri = '';
-		$separator = '/?';
-		
-		if($encodage == 'html') {
+		$separator = '?';
+
+		if ($encodage === 'html') {
 			$and = '&amp;';
 		} else {
 			$and = '&';
 		}
-		
-		if (isset ($url['c'])
-		 && $url['c'] != Minz_Request::defaultControllerName ()) {
+
+		if (isset($url['c'])
+		 && $url['c'] != Minz_Request::defaultControllerName()) {
 			$uri .= $separator . 'c=' . $url['c'];
 			$separator = $and;
 		}
-		
-		if (isset ($url['a'])
-		 && $url['a'] != Minz_Request::defaultActionName ()) {
+
+		if (isset($url['a'])
+		 && $url['a'] != Minz_Request::defaultActionName()) {
 			$uri .= $separator . 'a=' . $url['a'];
 			$separator = $and;
 		}
-		
-		if (isset ($url['params'])) {
+
+		if (isset($url['params'])) {
+			unset($url['params']['c']);
+			unset($url['params']['a']);
 			foreach ($url['params'] as $key => $param) {
-				$uri .= $separator . $key . '=' . $param;
+				$uri .= $separator . urlencode($key) . '=' . urlencode($param);
 				$separator = $and;
 			}
 		}
-		
+
 		return $uri;
 	}
-	
+
 	/**
 	 * Vérifie que les éléments du tableau représentant une url soit ok
 	 * @param l'url sous forme de tableau (sinon renverra directement $url)
@@ -98,7 +96,7 @@ class Minz_Url {
 	 */
 	public static function checkUrl ($url) {
 		$url_checked = $url;
-		
+
 		if (is_array ($url)) {
 			if (!isset ($url['c'])) {
 				$url_checked['c'] = Minz_Request::defaultControllerName ();
@@ -110,7 +108,7 @@ class Minz_Url {
 				$url_checked['params'] = array ();
 			}
 		}
-		
+
 		return $url_checked;
 	}
 }
diff --git a/lib/Minz/View.php b/lib/Minz/View.php
index e170bd406..8c5230ab6 100644
--- a/lib/Minz/View.php
+++ b/lib/Minz/View.php
@@ -13,8 +13,9 @@ class Minz_View {
 	const LAYOUT_FILENAME = '/layout.phtml';
 
 	private $view_filename = '';
-	private $use_layout = null;
+	private $use_layout = true;
 
+	private static $base_pathnames = array(APP_PATH);
 	private static $title = '';
 	private static $styles = array ();
 	private static $scripts = array ();
@@ -26,21 +27,37 @@ class Minz_View {
 	 * Détermine si on utilise un layout ou non
 	 */
 	public function __construct () {
-		$this->view_filename = APP_PATH
-		                     . self::VIEWS_PATH_NAME . '/'
-		                     . Minz_Request::controllerName () . '/'
-		                     . Minz_Request::actionName () . '.phtml';
+		$this->change_view(Minz_Request::controllerName(),
+		                   Minz_Request::actionName());
 
-		self::$title = Minz_Configuration::title ();
+		$conf = Minz_Configuration::get('system');
+		self::$title = $conf->title;
+	}
+
+	/**
+	 * Change le fichier de vue en fonction d'un controller / action
+	 */
+	public function change_view($controller_name, $action_name) {
+		$this->view_filename = self::VIEWS_PATH_NAME . '/'
+		                     . $controller_name . '/'
+		                     . $action_name . '.phtml';
+	}
+
+	/**
+	 * Add a base pathname to search views.
+	 *
+	 * New pathnames will be added at the beginning of the list.
+	 *
+	 * @param $base_pathname the new base pathname.
+	 */
+	public static function addBasePathname($base_pathname) {
+		array_unshift(self::$base_pathnames, $base_pathname);
 	}
 
 	/**
 	 * Construit la vue
 	 */
 	public function build () {
-		if ($this->use_layout === null) {	//TODO: avoid file_exists and require views to be explicit
-			$this->use_layout = file_exists (APP_PATH . self::LAYOUT_PATH_NAME . self::LAYOUT_FILENAME);
-		}
 		if ($this->use_layout) {
 			$this->buildLayout ();
 		} else {
@@ -49,24 +66,41 @@ class Minz_View {
 	}
 
 	/**
+	 * Include a view file.
+	 *
+	 * The file is searched inside list of $base_pathnames.
+	 *
+	 * @param $filename the name of the file to include.
+	 * @return true if the file has been included, false else.
+	 */
+	private function includeFile($filename) {
+		// We search the filename in the list of base pathnames. Only the first view
+		// found is considered.
+		foreach (self::$base_pathnames as $base) {
+			$absolute_filename = $base . $filename;
+			if (file_exists($absolute_filename)) {
+				include $absolute_filename;
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
 	 * Construit le layout
 	 */
 	public function buildLayout () {
-		include (
-			APP_PATH
-			. self::LAYOUT_PATH_NAME
-			. self::LAYOUT_FILENAME
-		);
+		header('Content-Type: text/html; charset=UTF-8');
+		$this->includeFile(self::LAYOUT_PATH_NAME . self::LAYOUT_FILENAME);
 	}
 
 	/**
 	 * Affiche la Vue en elle-même
 	 */
 	public function render () {
-		if ((include($this->view_filename)) === false) {
-			Minz_Log::record ('File not found: `'
-			            . $this->view_filename . '`',
-			            Minz_Log::NOTICE);
+		if (!$this->includeFile($this->view_filename)) {
+			Minz_Log::notice('File not found: `' . $this->view_filename . '`');
 		}
 	}
 
@@ -75,14 +109,9 @@ class Minz_View {
 	 * @param $part l'élément partial à ajouter
 	 */
 	public function partial ($part) {
-		$fic_partial = APP_PATH
-		             . self::LAYOUT_PATH_NAME . '/'
-		             . $part . '.phtml';
-
-		if ((include($fic_partial)) === false) {
-			Minz_Log::record ('File not found: `'
-			            . $fic_partial . '`',
-			            Minz_Log::WARNING);
+		$fic_partial = self::LAYOUT_PATH_NAME . '/' . $part . '.phtml';
+		if (!$this->includeFile($fic_partial)) {
+			Minz_Log::warning('File not found: `' . $fic_partial . '`');
 		}
 	}
 
@@ -91,18 +120,23 @@ class Minz_View {
 	 * @param $helper l'élément à afficher
 	 */
 	public function renderHelper ($helper) {
-		$fic_helper = APP_PATH
-		            . '/views/helpers/'
-		            . $helper . '.phtml';
-
-		if ((include($fic_helper)) === false) {;
-			Minz_Log::record ('File not found: `'
-			            . $fic_helper . '`',
-			            Minz_Log::WARNING);
+		$fic_helper = '/views/helpers/' . $helper . '.phtml';
+		if (!$this->includeFile($fic_helper)) {
+			Minz_Log::warning('File not found: `' . $fic_helper . '`');
 		}
 	}
 
 	/**
+	 * Retourne renderHelper() dans une chaîne
+	 * @param $helper l'élément à traîter
+	 */
+	public function helperToString($helper) {
+		ob_start();
+		$this->renderHelper($helper);
+		return ob_get_clean();
+	}
+
+	/**
 	 * Permet de choisir si on souhaite utiliser le layout
 	 * @param $use true si on souhaite utiliser le layout, false sinon
 	 */