ResourceFilter.java

/*
 * (C) Copyright 2011 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Contributors:
 *     tdelprat, jcarsique
 *
 */

package org.nuxeo.wizard;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

/**
 * Filter that let the default servlet handle the resources and forward processing calls to the servlet
 *
 * @author Tiry (tdelprat@nuxeo.com)
 * @since 5.4.2
 */
public class ResourceFilter implements Filter {

    protected String[] resourcesPrefix = { "/css/", "/images/", "/scripts/", "/jsp/" };

    protected boolean isResourceCall(String uri) {
        for (String prefix : resourcesPrefix) {
            if (uri.startsWith(prefix)) {
                return true;
            }
        }
        return false;
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
            ServletException {

        HttpServletRequest httpRequest = (HttpServletRequest) request;

        String uri = httpRequest.getRequestURI();
        uri = uri.replaceFirst(httpRequest.getContextPath(), "");

        if (!isResourceCall(uri)) {
            request.getRequestDispatcher("/router" + uri).forward(request, response);
        } else {
            chain.doFilter(httpRequest, response);
        }
    }

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void destroy() {
    }

}