Core Servlets and JavaServer Pages, Volume 2

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Larry Brown, Marty Hall, and Yaakov Chaikin

"Core Servlets and JavaServer Pages, Volume 2"

servlet.http.*;
/** Simple filter that prints a report on the standard output
* each time an associated servlet or JSP page is accessed.
*/
public class ReportFilter implements Filter {
public void doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
throws ServletException, IOException {
HttpServletRequest req = (HttpServletRequest)request;
System.out.println(req.getRemoteHost() +
" tried to access " +
req.getRequestURL() +
" on " + new Date() + ".");
chain.doFilter(request,response);
}
public void init(FilterConfig config) {}
public void destroy() {}
}
Listing 5.3 web.xml (Excerpt for reporting filter)

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation=
"http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">

Reporter

coreservlets.filters.ReportFilter

Chapter 5 ?– Servlet and JSP Filters 212

Reporter

/index.jsp

Reporter

TodaysSpecial

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Larry Brown, Marty Hall, and Yaakov Chaikin

"Core Servlets and JavaServer Pages, Volume 2"