/**
* The contents of this file are subject to the license and copyright
* detailed in the LICENSE and NOTICE files at the root of the source
* tree and available online at
*
* http://www.dspace.org/license/
*/
package org.dspace.app.webui.filter;
import java.io.IOException;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.apache.log4j.Logger;
import org.dspace.app.webui.util.Authenticate;
import org.dspace.app.webui.util.JSPManager;
import org.dspace.app.webui.util.UIUtil;
import org.dspace.core.Context;
import org.dspace.core.LogManager;
/**
* DSpace filter that only allows requests from authenticated shib users
* to proceed. Anonymous requests prompt the authentication procedure.
*
* @author <a href="mailto:bliong@melcoe.mq.edu.au">Bruc Liong, MELCOE</a>
* @author <a href="mailto:kli@melcoe.mq.edu.au">Xiang Kevin Li, MELCOE</a>
* @version $Revision$
*/
public class ShibbolethFilter implements Filter
{
/** log4j category */
private static Logger log = Logger.getLogger(ShibbolethFilter.class);
public void init(FilterConfig config)
{
// Do nothing
}
public void doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
throws ServletException, IOException
{
Context context = null;
// We need HTTP request objects
HttpServletRequest hrequest = (HttpServletRequest) request;
HttpServletResponse hresponse = (HttpServletResponse) response;
try
{
// Obtain a context
context = UIUtil.obtainContext(hrequest);
if (context.getCurrentUser() == null)
{
java.util.Enumeration names = ((HttpServletRequest) request).getHeaderNames();
String name;
while(names.hasMoreElements())
{
name = names.nextElement().toString();
log.debug("header:" + name + "=" + ((HttpServletRequest) request).getHeader(name));
}
// No current user, prompt authentication
Authenticate.startAuthentication(context, hrequest, hresponse);
}else{
chain.doFilter(hrequest, hresponse);
return;
}
}
catch (SQLException se)
{
log.warn(LogManager.getHeader(context,
"database_error",
se.toString()), se);
JSPManager.showInternalError(hrequest, hresponse);
}
// Abort the context if it's still valid
if (context != null && context.isValid())
{
context.abort();
}
}
public void destroy()
{
// Nothing
}
}