package at.meikel.dmrl.webapp.rest;
   
   import java.io.IOException;
   
   import javax.servlet.Filter;
   import javax.servlet.FilterChain;
   import javax.servlet.FilterConfig;
   import javax.servlet.ServletException;
   import javax.servlet.ServletOutputStream;
  import javax.servlet.ServletRequest;
  import javax.servlet.ServletResponse;
  import javax.servlet.http.HttpServletRequest;
  
  import org.apache.log4j.Logger;
  
  /**
   * Servlet Filter implementation class SampleFilter
   */
  public class SampleFilter implements Filter {
  
  	private static final Logger LOGGER = Logger.getLogger(SampleFilter.class);
  
  	/**
  	 * Default constructor.
  	 */
  	public SampleFilter() {
  	}
  
  	/**
  	 * @see Filter#destroy()
  	 */
  	public void destroy() {
  	}
  
  	/**
  	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
  	 */
  	public void doFilter(ServletRequest request, ServletResponse response,
  			FilterChain chain) throws IOException, ServletException {
  		// String url = request.getScheme() + request.getServerName()
  		// + request.getServerPort();
  		String reqUrl = "unknown";
  		try {
  			reqUrl = ((HttpServletRequest) request).getRequestURL().toString();
  			String queryString = ((HttpServletRequest) request)
  					.getQueryString();
  			if (queryString != null) {
  				reqUrl += "?" + queryString;
  			}
  		} catch (Exception e) {
  			// ignore
  		}
  
  		LOGGER.info("Executing servlet for URL " + reqUrl + " at "
  				+ new java.util.Date());
  		LOGGER.info("    request-content-type=" + request.getContentType());
  		String callback = request.getParameter("callback");
  		LOGGER.info("    callback=" + callback);
  		ServletOutputStream out = response.getOutputStream();
  		if (callback != null) {
  			out.write((callback + "(").getBytes());
  		}
  		chain.doFilter(request, response);
  		if (callback != null) {
  			out.write(")".getBytes());
  		}
  		LOGGER.info("    response-content-type=" + response.getContentType());
  		out.close();
  	}
  
  	/**
  	 * @see Filter#init(FilterConfig)
  	 */
  	public void init(FilterConfig fConfig) throws ServletException {
  	}
  
  }