Package com.levigo.jadice.web.server.filter

Class NoCacheFilter

java.lang.Object

com.levigo.jadice.web.server.filter.NoCacheFilter

All Implemented Interfaces:

jakarta.servlet.Filter

@WebFilter(description="Disable caching for non-cacheable GWT resources",
           displayName="jadice web toolkit GWT resource non-caching",
           filterName="jwtNoCacheFilter",
           urlPatterns="/*",
           asyncSupported=true)
public class NoCacheFilter
extends Object
implements jakarta.servlet.Filter

This Filter adds the required HTTP Headers to the HttpServletResponse to force the browser not to cache the resource that was returned.

Caching will be turned for all *.nocache.* files, by (GWT) design. Additionally, this filter excludes index.* from caching.

This filter injects the following HTML headers into the response:

• Cache-Control: "no-cache, no-store, must-revalidate"
• Expires: -1
• Pragma: No-cache

Constructor Summary

Constructors

Constructor	Description
NoCacheFilter()
NoCacheFilter(String... additionalPatterns)

Method Summary

Modifier and Type	Method	Description
protected boolean	appliesTo(String path)	Checks whether this filter applies to the given path.
void	destroy()
void	doFilter(jakarta.servlet.ServletRequest request, jakarta.servlet.ServletResponse response, jakarta.servlet.FilterChain chain)
void	init(jakarta.servlet.FilterConfig filterConfig)

Methods inherited from class java.lang.Object

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

Constructor Details

NoCacheFilter

public NoCacheFilter()

NoCacheFilter

public NoCacheFilter(String... additionalPatterns)

Method Details

init

public void init(jakarta.servlet.FilterConfig filterConfig)
          throws jakarta.servlet.ServletException

Specified by:

init in interface jakarta.servlet.Filter

Throws:

jakarta.servlet.ServletException

doFilter

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

Specified by:

doFilter in interface jakarta.servlet.Filter

Throws:

IOException

jakarta.servlet.ServletException

appliesTo

protected boolean appliesTo(String path)

Checks whether this filter applies to the given path.

Parameters:

path - The path of the request

Returns:

true if one of the patterns matches the given path and the headers shall be applied

destroy

public void destroy()

Specified by:

destroy in interface jakarta.servlet.Filter