com.swdouglass.joid.server.UserUrlFilter.java Source code

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Here is the source code for com.swdouglass.joid.server.UserUrlFilter.java

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/*
 * MODIFICATIONS to the original source have been made by
 * Scott Douglass <scott@swdouglass.com>
 *
 * Copyright 2009 Scott Douglass <scott@swdouglass.com>
 * 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.
 *
 * The original copyright notice and license terms are below.
 */
package com.swdouglass.joid.server;

import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.Log;
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;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.net.URLDecoder;

/**
 * 
 */
public class UserUrlFilter implements Filter {

    private static Log log = LogFactory.getLog(UserUrlFilter.class);
    private String idJsp;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        idJsp = filterConfig.getInitParameter("idJsp");
    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse res, FilterChain filterChain)
            throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;

        String s = request.getServletPath();
        s = URLDecoder.decode(s, "utf-8");
        log.debug("servletpath: " + s);
        String[] sections = s.split("/");
        log.debug("sections.length: " + sections.length);
        String contextPath = request.getContextPath();
        if (sections.length >= 2) {
            for (int i = 0; i < sections.length; i++) {
                String section = sections[i];
                log.debug("section: " + section);
                if (section.equals("user")) {
                    String username = sections[i + 1];
                    log.debug("username: " + username);
                    log.debug("forwarding to: " + contextPath + idJsp);
                    request.setAttribute("username", username);
                    forward(request, response, idJsp);
                    return;
                }
            }

        }
        filterChain.doFilter(req, res);
    }

    @Override
    public void destroy() {
    }

    private void forward(HttpServletRequest request, HttpServletResponse response, String path)
            throws IOException, ServletException {
        request.getRequestDispatcher(path).forward(request, response);
    }
}