diff --git a/src/Pluf/Cache.php b/src/Pluf/Cache.php
new file mode 100644
index 0000000..ee45b8a
--- /dev/null
+++ b/src/Pluf/Cache.php
@@ -0,0 +1,72 @@
+<?php
+/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+# ***** BEGIN LICENSE BLOCK *****
+# This file is part of Plume Framework, a simple PHP Application Framework.
+# Copyright (C) 2001-2007 Loic d'Anterroches and contributors.
+#
+# Plume Framework is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# Plume Framework is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+# ***** END LICENSE BLOCK ***** */
+
+/**
+ * Cache class.
+ *
+ * You should not use this class directly, but one of the subclasses
+ * implementing a given engine.
+ *
+ * Default timeout in seconds is defined by the 'cache_timeout'
+ * configuration variable.
+ *
+ * <code>
+ * $cache = new Pluf_Cache_File();
+ * if (null === ($foo=$cache->get('my-key'))) {
+ *     $foo = run_complex_operation();
+ *     $cache->set('my-key', $foo);
+ * }
+ * return $foo;
+ * </code>
+ *
+ * The value to be stored in the cache must be serializable.
+ *
+ * @see http://www.php.net/serialize
+ */
+class Pluf_Cache
+{
+    /**
+     * Set a value in the cache.
+     *
+     * @param string Key to store the information
+     * @param mixed Value to store
+     * @param int Timeout in seconds (null)
+     * @return bool Success
+     */
+    public function set($key, $value, $timeout=null)
+    {
+        throw new Pluf_Exception_NotImplemented();
+    }
+
+    /**
+     * Get value from the cache.
+     *
+     * @param string Key to get the information
+     * @param mixed Default value to return if cache miss (null)
+     * @param mixed Stored value or default
+     */
+    public function get($key, $default=null)
+    {
+        throw new Pluf_Exception_NotImplemented();
+    }
+}
diff --git a/src/Pluf/Cache/File.php b/src/Pluf/Cache/File.php
new file mode 100644
index 0000000..28e4da1
--- /dev/null
+++ b/src/Pluf/Cache/File.php
@@ -0,0 +1,88 @@
+<?php
+/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+# ***** BEGIN LICENSE BLOCK *****
+# This file is part of Plume Framework, a simple PHP Application Framework.
+# Copyright (C) 2001-2007 Loic d'Anterroches and contributors.
+#
+# Plume Framework is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# Plume Framework is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+# ***** END LICENSE BLOCK ***** */
+
+/**
+ * File based cache.
+ *
+ * Info are stored in the 'cache_file_folder' folder. In the folder, 2
+ * subdirectories are created based on the md5 of the key.
+ */
+class Pluf_Cache_File extends Pluf_Cache
+{
+    public function __constructor()
+    {
+        if (false == Pluf::f('cache_file_folder', false)) {
+            throw new Pluf_Exception_SettingError('"cache_file_folder" setting not defined.');
+        }
+    }
+
+    /**
+     * Set a value in the cache.
+     *
+     * @param string Key to store the information
+     * @param mixed Value to store
+     * @param int Timeout in seconds (null)
+     * @return bool Success
+     */
+    public function set($key, $value, $timeout=null)
+    {
+        $fname = $this->_keyToFile($key);
+        $dir = dirname($fname);
+        if ($timeout == null) $timeout = Pluf::f('cache_timeout', 300);
+        if (!file_exists($dir)) mkdir($dir, 0777, true);
+        $expire = time()+$timeout;
+        file_put_contents($fname, $expire."\n".serialize($value));
+    }
+
+    /**
+     * Get value from the cache.
+     *
+     * @param string Key to get the information
+     * @param mixed Default value to return if cache miss (null)
+     * @param mixed Stored value or default
+     */
+    public function get($key, $default=null)
+    {
+        $fname = $this->_keyToFile($key);
+        if (!file_exists($fname)) return $default;
+        list($timeout, $content) = explode("\n", file_get_contents($fname), 2);
+        if ($timeout < time()) {
+            unlink($fname);
+            return $default;
+        }
+        return unserialize($content);
+    }
+
+    /**
+     * Convert a key into a path to a file.
+     *
+     * @param string Key
+     * @return string Path to file
+     */
+    public function _keyToFile($key)
+    {
+        $md5 = md5($key);
+        return Pluf::f('cache_file_folder').'/'.substr($md5, 0, 2)
+            .'/'.substr($md5, 2, 2).'/'.substr($md5, 4);
+    }
+}