com.xpn.xwiki.web

Class ActionFilter

java.lang.Object

com.xpn.xwiki.web.ActionFilter

All Implemented Interfaces:

javax.servlet.Filter

public class ActionFilter
extends Object
implements javax.servlet.Filter

A filter that dispatches requests to the right action, depending on the button that was pressed in the editing form. This is needed since the browser cannot send the form data to different URLs depending on the button pressed, and an XHTML form has only one target URL. In previous versions of XWiki this was accomplished using javascript code, with a fall-back on a pseudo-dispatcher inside the PreviewAction, which was on obvious case of bad code design.

The filter dispatches requests based on the presence of a request parameter starting with action_ followed by the name of the struts action that should actually process the request. For example, the button that does Save and Continue looks like:

 <input type="submit" name="action_saveandcontinue" value="..."/>
 

As a result, when clicking the button, the request is not sent to the form's target (preview), but is actually forwarded internally to /bin/saveandcontinue/The/Document.

Since:

1.8M1

Version:

$Id: 8c51706f44b05a188cb0da063ff096a577ce764b $

Constructor Summary

Constructors

Constructor and Description
ActionFilter()

Method Summary

Modifier and Type	Method and Description
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

ActionFilter

public ActionFilter()

Method Detail

init

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

Specified by:

init in interface javax.servlet.Filter

Throws:

javax.servlet.ServletException

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

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Filter