/*
    WebBox - Dein Server.
    Copyright (C) 2017 Ulrich Hilger, http://uhilger.de

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as
    published by the Free Software Foundation, either version 3 of the
    License, or (at your option) any later version.

    This program 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 Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package de.uhilger.wbx.web;

import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Logger;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Dieser Filter ist dem Beispiel auf 
 * http://otndnld.oracle.co.jp/document/products/as10g/101300/B25221_03/web.1013/b14426/filters.htm#BCFIAAAH
 * entnommen und kann zum Testen von Filter-Konfigurationen oder als Ausgangsbasis 
 * fuer komplexere Filter-Funktionen verwendet werden.
 * 
 * Das Beispiel umschliesst eine beliebige Antwort vom Server mit 
 * <HR>PRE</HR> <HR>POST</HR>
 * 
 * @author ulrich
 */
public class PrePostFilter extends MyGenericFilter { 
  
  private static final Logger logger = Logger.getLogger(PrePostFilter.class.getName());
 
  public void doFilter(final ServletRequest request,
                       final ServletResponse response,
                       FilterChain chain)
       throws IOException, ServletException { 
  HttpServletRequest hr = (HttpServletRequest) request;
  logger.info("requestURL: " + hr.getRequestURL().toString());
  logger.info("ContextPath: " + hr.getContextPath());
  logger.info("ServletPath: " + hr.getServletPath());
  logger.info("PathInfo: " + hr.getPathInfo());
  OutputStream out = response.getOutputStream();
  out.write(new String("<HR>PRE<HR>").getBytes());
  GenericResponseWrapper wrapper = 
         new GenericResponseWrapper((HttpServletResponse) response); 
  chain.doFilter(request,wrapper);
  out.write(wrapper.getData());
  out.write(new String("<HR>POST<HR>").getBytes());
  out.close(); 
  } 
  
  
  /*
  
  MarkdownProcessor p = new MarkdownProcessor();
    response.getWriter().write(p.markdown(responseContent));
  
  */
}