/**
 * 
 */
package utis.wall.common.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.HttpServletResponse;
import javax.servlet.http.HttpServletResponseWrapper;

/**
 * @author sjjung
 *
 */
public class EtagFilter implements Filter{


	public void init(FilterConfig arg0) throws ServletException {}

	public void destroy() {}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		// TODO Auto-generated method stub
		chain.doFilter(request, new HttpServletResponseWrapper((HttpServletResponse)response) {
		      public void setHeader(String name, String value) {
		          if (!"etag".equalsIgnoreCase(name)) {
		              super.setHeader(name, value);
		          }
		      }
		  });
	}
}
