org.apache.wiki.ui

Class WikiJSPFilter

java.lang.Object

org.apache.wiki.ui.WikiServletFilter

org.apache.wiki.ui.WikiJSPFilter

All Implemented Interfaces:

javax.servlet.Filter

public class WikiJSPFilter
extends WikiServletFilter

This filter goes through the generated page response prior and places requested resources at the appropriate inclusion markers. This is done to let dynamic content (e.g. plugins, editors) include custom resources, even after the HTML head section is in fact built. This filter is typically the last filter to execute, and it must run after servlet or JSP code that performs redirections or sends error codes (such as access control methods).

Inclusion markers are placed by the IncludeResourcesTag; the default content templates (see .../templates/default/commonheader.jsp) are configured to do this. As an example, a JavaScript resource marker is added like this:

 <wiki:IncludeResources type="script"/>
 

Any code that requires special resources must register a resource request with the TemplateManager. For example:

 <wiki:RequestResource type="script" path="scripts/custom.js" />
 

or programmatically,

 TemplateManager.addResourceRequest( context, TemplateManager.RESOURCE_SCRIPT, "scripts/customresource.js" );
 

See Also:

TemplateManager, RequestResourceTag

Field Summary

Fields inherited from class org.apache.wiki.ui.WikiServletFilter

m_engine

Constructor Summary

Constructors

Constructor and Description
WikiJSPFilter()

Method Summary

Modifier and Type	Method and Description
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain) Checks that the Engine is running ok, wraps the current HTTP request, and sets the correct authentication state for the users's Session.
protected void	fireEvent(int type, java.lang.String pagename) Fires a WikiPageEvent of the provided type and page name to all registered listeners of the current Engine.
void	init(javax.servlet.FilterConfig config) Initializes the WikiServletFilter.

Methods inherited from class org.apache.wiki.ui.WikiServletFilter

destroy, getWikiContext

Methods inherited from class java.lang.Object

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

Constructor Detail

WikiJSPFilter

public WikiJSPFilter()

Method Detail

init

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

Initializes the WikiServletFilter.

Specified by:

init in interface javax.servlet.Filter

Overrides:

init in class WikiServletFilter

Parameters:

config - The FilterConfig.

Throws:

javax.servlet.ServletException - If a Engine cannot be started.

doFilter

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

Description copied from class: WikiServletFilter

Checks that the Engine is running ok, wraps the current HTTP request, and sets the correct authentication state for the users's Session. First, the method AuthenticationManager.login(HttpServletRequest) executes, which sets the authentication state. Then, the request is wrapped with a WikiRequestWrapper.

Specified by:

doFilter in interface javax.servlet.Filter

Overrides:

doFilter in class WikiServletFilter

Parameters:

request - the current HTTP request object

response - the current HTTP response object

chain - The Filter chain passed down.

Throws:

javax.servlet.ServletException - if AuthenticationManager.login(HttpServletRequest) fails for any reason

java.io.IOException - If writing to the servlet response fails.

fireEvent

protected final void fireEvent(int type,
                               java.lang.String pagename)

Fires a WikiPageEvent of the provided type and page name to all registered listeners of the current Engine.

Parameters:

type - the event type to be fired

pagename - the wiki page name as a String

See Also:

WikiPageEvent