com.caucho.filters
Class ExpiresFilter

java.lang.Object
  com.caucho.filters.ExpiresFilter

All Implemented Interfaces:

Filter

public class ExpiresFilter
extends java.lang.Object
implements Filter

Caches the servlet output. ExpiresFilter sets the Expires header to a time in the filter. The page will be cached until that time expires.

The cache-time init-parameter configures how long the page should be cached:

 <filter>
   <filter-name>expires-cache</filter-name>
   <filter-class>com.caucho.http.filter.ExpiresFilter</filter-class>
   <init-param cache-time='10s'/>
 </filter>
 

The cache-time allows the standard extensions:

s	seconds
m	minutes
h	hours
D	days
W	weeks
M	months
Y	years

Since:

Resin 2.0.5

Constructor Summary

ExpiresFilter()

Method Summary

void	destroy() Any cleanup for the filter.
void	doFilter(ServletRequest request, ServletResponse response, FilterChain nextFilter) The filter add an Expires time in the future.
void	init(FilterConfig config) Filter init reads the filter configuration
void	setCacheTime(Period period)

Methods inherited from class java.lang.Object

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

Constructor Detail

ExpiresFilter

public ExpiresFilter()

Method Detail

setCacheTime

public void setCacheTime(Period period)

init

public void init(FilterConfig config)
          throws ServletException

Filter init reads the filter configuration

Specified by:

init in interface Filter

Throws:

ServletException

doFilter

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

The filter add an Expires time in the future.

Specified by:

doFilter in interface Filter

Parameters:

request - the servlet request

response - the servlet response

nextFilter - the next filter in the chain

Throws:

ServletException

java.io.IOException

destroy

public void destroy()

Any cleanup for the filter.

Specified by:

destroy in interface Filter