<?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) 2001-2009 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 ***** */
/**
* Readonly middleware.
*
* It is intercepting all the POST requests with a message telling
* that the website is in read only mode.
*
* Optionally, a message at the top of the page is added to inform
* that the website is in read only mode.
*
* Add the middleware at the top of your middleware list and
* optionally add a message to be displayed in your configuration
* file.
*
* Example:
*
* <pre>
* $cfg['middleware_classes'] = array(
* 'Pluf_Middleware_ReadOnly',
* 'Pluf_Middleware_Csrf',
* 'Pluf_Middleware_Session',
* 'Pluf_Middleware_Translation',
* );
* $cfg['read_only_mode_message'] = 'The server is in read only mode the '
* .'time to be migrated on another host.'
* .'Thank you for your patience.';
* </pre>
*
* You can put HTML in your message.
*
*/
class Pluf_Middleware_ReadOnly
{
/**
* Process the request.
*
* @param Pluf_HTTP_Request The request
* @return bool false
*/
function process_request(&$request)
{
if ($request->method == 'POST') {
$res = new Pluf_HTTP_Response('Server in read only mode'."\n\n".'We are upgrading the system to make it better for you, please try again later...', 'text/plain');
$res->status_code = 503;
return $res;
}
return false;
}
/**
* Process the response of a view.
*
* If configured, add the message to inform that the website is in
* read only mode.
*
* @param Pluf_HTTP_Request The request
* @param Pluf_HTTP_Response The response
* @return Pluf_HTTP_Response The response
*/
function process_response($request, $response)
{
if (!Pluf::f('read_only_mode_message', false)) {
return $response;
}
if (!in_array($response->status_code,
array(200, 201, 202, 203, 204, 205, 206, 404, 501))) {
return $response;
}
$ok = false;
$cts = array('text/html', 'application/xhtml+xml');
foreach ($cts as $ct) {
if (false !== strripos($response->headers['Content-Type'], $ct)) {
$ok = true;
break;
}
}
if ($ok == false) {
return $response;
}
$message = Pluf::f('read_only_mode_message');
$response->content = str_replace('<body>', '<body><div style="width: 50%; color: #c00; border: 2px solid #c00; padding: 5px; margin: 1em auto 2em; background-color: #fffde3">'.$message.'</div>', $response->content);
return $response;
}
}