net.sf.fb4j.canvas
Class CanvasFilter

java.lang.Object
  net.sf.fb4j.canvas.CanvasFilter

All Implemented Interfaces:

javax.servlet.Filter

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

Servlet Filter to be used by Facebook canvas applications (FBML or IFRAME). Facilitates authentication and instantiates CanvasRequest object used to obtain FacebookSession.

Author:

Gino Miceli

Constructor Summary

CanvasFilter()

Method Summary

void	destroy()
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)
protected java.lang.String	extractGetRequest(javax.servlet.ServletRequest request)
protected CanvasRequest	getFacebookRequest(javax.servlet.ServletRequest request)
protected boolean	getInitParameter(javax.servlet.FilterConfig config, java.lang.String param, boolean defaultValue)
protected long	getInitParameter(javax.servlet.FilterConfig config, java.lang.String param, long defaultValue)
protected java.lang.String	getInitParameter(javax.servlet.FilterConfig config, java.lang.String param, java.lang.String defaultValue)
void	init(javax.servlet.FilterConfig config)

Methods inherited from class java.lang.Object

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

Constructor Detail

CanvasFilter

public CanvasFilter()

Method Detail

init

public void init(javax.servlet.FilterConfig config)
          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 java.io.IOException,
                     javax.servlet.ServletException

Specified by:

doFilter in interface javax.servlet.Filter

Throws:

java.io.IOException

javax.servlet.ServletException

extractGetRequest

protected java.lang.String extractGetRequest(javax.servlet.ServletRequest request)

getInitParameter

protected java.lang.String getInitParameter(javax.servlet.FilterConfig config,
                                            java.lang.String param,
                                            java.lang.String defaultValue)

getInitParameter

protected boolean getInitParameter(javax.servlet.FilterConfig config,
                                   java.lang.String param,
                                   boolean defaultValue)

getInitParameter

protected long getInitParameter(javax.servlet.FilterConfig config,
                                java.lang.String param,
                                long defaultValue)

getFacebookRequest

protected CanvasRequest getFacebookRequest(javax.servlet.ServletRequest request)

destroy

public void destroy()

Specified by:

destroy in interface javax.servlet.Filter