org.opennms.web
Class AddRefreshHeaderFilter
java.lang.Object
org.opennms.web.AddRefreshHeaderFilter
- All Implemented Interfaces:
- javax.servlet.Filter
- public class AddRefreshHeaderFilter
- extends java.lang.Object
- implements javax.servlet.Filter
A filter that adds an HTTP Refresh header to a servlet or
JSP's response. The amount of time to wait before refresh is configurable.
- Author:
- Lawrence Karnowski, OpenNMS
Field Summary |
protected javax.servlet.FilterConfig |
filterConfig
|
protected java.lang.String |
seconds
|
Method Summary |
void |
destroy()
|
void |
doFilter(javax.servlet.ServletRequest request,
javax.servlet.ServletResponse response,
javax.servlet.FilterChain chain)
Adds a Refresh HTTP header before processing the request. |
void |
init(javax.servlet.FilterConfig config)
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
filterConfig
protected javax.servlet.FilterConfig filterConfig
seconds
protected java.lang.String seconds
AddRefreshHeaderFilter
public AddRefreshHeaderFilter()
doFilter
public void doFilter(javax.servlet.ServletRequest request,
javax.servlet.ServletResponse response,
javax.servlet.FilterChain chain)
throws java.io.IOException,
javax.servlet.ServletException
- Adds a Refresh HTTP header before processing the request.
This is a strange implementation, because intuitively, you would add
the header after the content has been produced (in other words, after you
had already called FilterChain.doFilter
. However,
the Servlet 2.3 spec (proposed final draft) states (albeitly in an off-handed
fashion) that you can only "examine" the response headers after the
doFilter
call. Evidently this means that you cannot change the
headers after the doFilter
. If you call setHeader
nothing happens.
- Specified by:
doFilter
in interface javax.servlet.Filter
- Throws:
java.io.IOException
javax.servlet.ServletException
init
public void init(javax.servlet.FilterConfig config)
- Specified by:
init
in interface javax.servlet.Filter
destroy
public void destroy()
- Specified by:
destroy
in interface javax.servlet.Filter
Generated by eevans on November 12 2004 1715.