org.talika.tarsis.filters.gzip
Class GZIPFilter

java.lang.Object
  org.talika.tarsis.filters.AbstractFilter
      org.talika.tarsis.filters.gzip.GZIPFilter

All Implemented Interfaces:

javax.servlet.Filter

public final class GZIPFilter
extends AbstractFilter

GZIPFilter checks if client's accepts gzip encoding and then compress output using GZIP method.

Version:

$Revision: 269 $

Author:

Jose M. Palomar

Constructor Summary

GZIPFilter()

Method Summary

protected boolean	acceptsGZIPEncoding(javax.servlet.http.HttpServletRequest request) Checks if client accepts GZIP encoding.
void	doFilter(javax.servlet.ServletRequest servletRequest, javax.servlet.ServletResponse servletResponse, javax.servlet.FilterChain filterChain) Checks if client's accepts gzip encoding and then compress output using GZIP method.
protected boolean	isNetscape4(javax.servlet.http.HttpServletRequest request) Checks if client is Netscape 4.

Methods inherited from class org.talika.tarsis.filters.AbstractFilter

destroy, getContext, getFilterConfig, getLogger, init

Methods inherited from class java.lang.Object

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

Constructor Detail

GZIPFilter

public GZIPFilter()

Method Detail

doFilter

public void doFilter(javax.servlet.ServletRequest servletRequest,
                     javax.servlet.ServletResponse servletResponse,
                     javax.servlet.FilterChain filterChain)
              throws java.io.IOException,
                     javax.servlet.ServletException

Checks if client's accepts gzip encoding and then compress output using GZIP method.

Specified by:

doFilter in interface javax.servlet.Filter

Specified by:

doFilter in class AbstractFilter

Parameters:

servletRequest - ServletRequest the ServletRequest object that contains the client's request.

servletResponse - ServletResponse the ServletResponse object that contains the servlet's response.

filterChain - FilterChain invocation chain of filtered request.

Throws:

java.io.IOException - if an input or output exception occurs

javax.servlet.ServletException - if an exception has occurred that interferes with the filter's normal operation

See Also:

Filter.doFilter(ServletRequest, ServletResponse, FilterChain)

acceptsGZIPEncoding

protected boolean acceptsGZIPEncoding(javax.servlet.http.HttpServletRequest request)

Checks if client accepts GZIP encoding.

Parameters:

request - HttpServletRequest the HttpServletRequest object that contains the client's request.

Returns:

boolean true if client accepts GZIP encoding.

isNetscape4

protected boolean isNetscape4(javax.servlet.http.HttpServletRequest request)

Checks if client is Netscape 4.

Parameters:

request - HttpServletRequest the HttpServletRequest object that contains the client's request.

Returns:

boolean true if client is Netscape 4.