org.apache.wiki.ui

Class WikiServletFilter

java.lang.Object

org.apache.wiki.ui.WikiServletFilter

All Implemented Interfaces:

javax.servlet.Filter

Direct Known Subclasses:

WikiJSPFilter

public class WikiServletFilter
extends java.lang.Object
implements javax.servlet.Filter

Filter that verifies that the Engine is running, and sets the authentication status for the user's Session. Each HTTP request processed by this filter is wrapped by a WikiRequestWrapper. The wrapper's primary responsibility is to return the correct userPrincipal and remoteUser for authenticated JSPWiki users (whether authenticated by container or by JSPWiki's custom system). The wrapper's other responsibility is to incorporate JSPWiki built-in roles into the role-checking algorithm for HttpServletRequest.isUserInRole(String). Just before the request is wrapped, the method AuthenticationManager.login(HttpServletRequest) executes; this method contains all of the logic needed to grab any user login credentials set by the container or by cookies.

Field Summary

Fields

Modifier and Type	Field and Description
protected Engine	m_engine

Constructor Summary

Constructors

Constructor and Description
WikiServletFilter() Creates a Wiki Servlet Filter.

Method Summary

Modifier and Type	Method and Description
void	destroy() Destroys the WikiServletFilter.
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 Context	getWikiContext(javax.servlet.ServletRequest request) Figures out the wiki context from the request.
void	init(javax.servlet.FilterConfig config) Initializes the WikiServletFilter.

Methods inherited from class java.lang.Object

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

Field Detail

m_engine

protected Engine m_engine

Constructor Detail

WikiServletFilter

public WikiServletFilter()

Creates a Wiki Servlet Filter.

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

Parameters:

config - The FilterConfig.

Throws:

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

destroy

public void destroy()

Destroys the WikiServletFilter.

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 java.io.IOException,
                     javax.servlet.ServletException

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

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.

getWikiContext

protected Context getWikiContext(javax.servlet.ServletRequest request)

Figures out the wiki context from the request. This method does not create the context if it does not exist.

Parameters:

request - The request to examine

Returns:

A valid WikiContext value (or null, if the context could not be located).