toolbox.web
Class SyncTokenFilter

java.lang.Object
  toolbox.web.SyncTokenFilter

All Implemented Interfaces:

javax.servlet.Filter

public class SyncTokenFilter
extends java.lang.Object
implements javax.servlet.Filter

Filter implementation to ensure that no duplicate form submissions occur.

Constructor Summary

SyncTokenFilter()
Default constructor

Method Summary

void	destroy() Destroy
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain) Verify that the token value for the submitted form has changed.
void	init(javax.servlet.FilterConfig config) Initialise this filter.

Methods inherited from class java.lang.Object

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

Constructor Detail

SyncTokenFilter

public SyncTokenFilter()

Default constructor

Method Detail

init

public void init(javax.servlet.FilterConfig config)
          throws javax.servlet.ServletException

Initialise this filter.

Specified by:

init in interface javax.servlet.Filter

Parameters:

config - Filter configuration.

Throws:

javax.servlet.ServletException - if filter cannot be initialised.

doFilter

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

Verify that the token value for the submitted form has changed.

Specified by:

doFilter in interface javax.servlet.Filter

Parameters:

request - ServletRequest

response - ServletResponse

chain - FilterChain

Throws:

javax.servlet.ServletException

java.io.IOException

destroy

public void destroy()

Destroy

Specified by:

destroy in interface javax.servlet.Filter