net.myrrix.web

Class DoSFilter

java.lang.Object

net.myrrix.web.DoSFilter

All Implemented Interfaces:

javax.servlet.Filter

public final class DoSFilter
extends Object
implements javax.servlet.Filter

A Filter that rejects requests from hosts that are sending too many requests. This is measured as a number of requests in the last minute. If the limit is exceeded, requests from the host are rejected with HTTP status HttpServletResponse.SC_FORBIDDEN. The host remians banned for about an hour.

Author:

Sean Owen

Field Summary

Fields

Modifier and Type	Field and Description
static String	MAX_ACCESS_PER_HOST_PER_MIN_KEY

Constructor Summary

Constructors

Constructor and Description
DoSFilter()

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy()
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)
void	init(javax.servlet.FilterConfig filterConfig)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_ACCESS_PER_HOST_PER_MIN_KEY

public static final String MAX_ACCESS_PER_HOST_PER_MIN_KEY

See Also:

Constant Field Values

Constructor Detail

DoSFilter

public DoSFilter()

Method Detail

init

public void init(javax.servlet.FilterConfig filterConfig)

Specified by:

init in interface javax.servlet.Filter

doFilter

public void doFilter(javax.servlet.ServletRequest request,
            javax.servlet.ServletResponse response,
            javax.servlet.FilterChain chain)
              throws IOException,
                     javax.servlet.ServletException

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

IOException

javax.servlet.ServletException

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Filter