/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Sam
*/
package com.caucho.rewrite;
import javax.servlet.http.HttpServletRequest;
import com.caucho.config.Configurable;
import com.caucho.vfs.Path;
import com.caucho.vfs.Vfs;
/**
* Match if the file specified by getRealPath() exists in the filesystem.
*
* <pre>
* <resin:Allow url-pattern="/admin/*">
* xmlns:resin="urn:java:com.caucho.resin">
* <resin:IfFileExists/>
* </resin:Allow>
* </pre>
*
* <p>RequestPredicates may be used for security and rewrite actions.
*/
@Configurable
public class IfFileExists implements RequestPredicate, CacheablePredicate
{
/**
* True if the predicate matches.
*
* @param request the servlet request to test
*/
@Override
public boolean isMatch(HttpServletRequest request)
{
String servletPath = request.getServletPath();
String realPath;
if (servletPath != null)
realPath = request.getServletContext().getRealPath(servletPath);
else
realPath = request.getServletContext().getRealPath(request.getPathInfo());
Path path = Vfs.lookup(realPath);
return path.exists() && path.isFile();
}
}