InternalWebAuthFilter.java

/**
 * The contents of this file are subject to the license and copyright
 * detailed in the LICENSE file at the root of the source
 * tree and available online at
 *
 * https://github.com/keeps/roda
 */
package org.roda.wui.filter;

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;
import javax.servlet.http.HttpServletResponse;

import org.roda.core.common.UserUtility;
import org.roda.wui.client.common.utils.StringUtils;
import org.roda.wui.client.welcome.Welcome;
import org.roda.wui.common.client.tools.HistoryUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Internal authentication filter for web requests.
 * 
 * @author Hélder Silva <hsilva@keep.pt>
 */
public class InternalWebAuthFilter implements Filter {
  /** Logger. */
  private static final Logger LOGGER = LoggerFactory.getLogger(InternalWebAuthFilter.class);

  @Override
  public void init(final FilterConfig config) throws ServletException {
    LOGGER.info("{} initialized ok", getClass().getSimpleName());
  }

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

    final HttpServletRequest httpRequest = (HttpServletRequest) request;
    final HttpServletResponse httpResponse = (HttpServletResponse) response;

    final String url = httpRequest.getRequestURL().toString();
    final String requestURI = httpRequest.getRequestURI();
    final String service = httpRequest.getParameter("service");
    final String hash = httpRequest.getParameter("hash");
    final String locale = httpRequest.getParameter("locale");
    final String contextPath = httpRequest.getContextPath();

    LOGGER.debug("URL: {} ; Request URI: {} ; Context Path: {}; Service: {} ; Hash: {}; Locale: {}", url, requestURI,
      contextPath, service, hash, locale);

    if (requestURI.endsWith("/login")) {
      final StringBuilder b = new StringBuilder();
      b.append(contextPath + "/");

      if (StringUtils.isNotBlank(locale)) {
        b.append("?locale=").append(locale);
      }

      b.append("#login");

      if (StringUtils.isNotBlank(hash)) {
        b.append(HistoryUtils.HISTORY_SEP).append(hash);
      }

      httpResponse.sendRedirect(b.toString());
    } else if (requestURI.endsWith("/logout")) {
      UserUtility.logout(httpRequest);

      final StringBuilder b = new StringBuilder();
      b.append(contextPath + "/");

      if (StringUtils.isNotBlank(locale)) {
        b.append("?locale=").append(locale);
      }

      b.append("#").append(Welcome.RESOLVER.getHistoryToken());

      httpResponse.sendRedirect(b.toString());

    } else {
      chain.doFilter(request, response);
    }
  }

  @Override
  public void destroy() {
    // do nothing
  }

}