Metacat

/* WMS Filter

 * Author: MP

 * Status: Just a test

 * MPTODO: make this a true servlet filter to append sld to any incoming wms request

 */

package edu.ucsb.nceas.metacat.spatial;

import javax.servlet.*;

import javax.servlet.http.*;

import java.io.IOException;

import java.util.Enumeration;

public final class WmsFilter implements Filter {

   private FilterConfig filterConfig = null;

   public void init(FilterConfig filterConfig) 

      throws ServletException {

      this.filterConfig = filterConfig;

   }

   public void destroy() {

      this.filterConfig = null;

   }

   public void doFilter(ServletRequest request,

      ServletResponse response, FilterChain chain) 

      throws IOException, ServletException {

      if (filterConfig == null)

         return;

      System.out.println("\n===============");

      System.out.println(" The filter Works !!!");

      long before = System.currentTimeMillis();

      // Attributes != Paramters but there is no setParameter

      //request.setAttribute("SLD", "http://pmark.msi.ucsb.edu:8180/knb/style/skins/ebm/spatial/data_bounds_style.sld");

      Enumeration e = request.getParameterNames();

      while( e.hasMoreElements() ) {

          String name = (String) e.nextElement();

          System.out.println( name + " = " + request.getParameter(name));

      }

      chain.doFilter(request, response);

      long after = System.currentTimeMillis();

      System.out.println(" *** Time  " + (after - before) + "ms");

      System.out.println("===============\n");

      // A simple redirect won't work since it will filter itself endlessly

      //HttpServletResponse hres = (HttpServletResponse) response;

      //HttpServletRequest hreq = (HttpServletRequest) response;

      //hres.sendRedirect( hreq.getRequestURL().toString() );

   }

}