org.apache.shindig.gadgets.servlet

Class ETagFilter

java.lang.Object

org.apache.shindig.gadgets.servlet.ETagFilter

All Implemented Interfaces:

javax.servlet.Filter

public class ETagFilter
extends Object
implements javax.servlet.Filter

A servlet filter to generate and check ETags in HTTP responses. An ETag is calculated for the servlet's output. If its value matches the value provided in the request's "If-None-Match" header, a 304 Not Modified response is returned; otherwise, the value is added to the response's "ETag" header. Note that when this filter is applied, the response body cannot be streamed.

Constructor Summary

Constructors

Constructor and Description
ETagFilter()

Method Summary

Methods

Modifier and Type	Method and Description
protected ETaggingHttpResponse	createTaggingResponse(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response)
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

Constructor Detail

ETagFilter

public ETagFilter()

Method Detail

init

public void init(javax.servlet.FilterConfig filterConfig)

Specified by:

init in interface javax.servlet.Filter

destroy

public void destroy()

Specified by:

destroy 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

createTaggingResponse

protected ETaggingHttpResponse createTaggingResponse(javax.servlet.ServletRequest request,
                                         javax.servlet.ServletResponse response)