/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.as.test.integration.web.customerrors;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.ServletException;
import javax.servlet.ServletContext;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import org.jboss.logging.Logger;
/**
* A generic fowarding servlet that obtains the ServletContext for the
* forwardContext init-param and then obtain a request dispatcher for the
* request.getPathInfo and forward the request. This allows a global servlet
* mapping to redirect requests to a common target. An example would be a global
* web.xml error-pages with a single shared context for the web pages. This
* requires that the web context crossContext attribute is set to true.
*
* @author Scott.Stark@jboss.org
*/
public class ContextForwardServlet extends HttpServlet {
private static final long serialVersionUID = -853278446594804509L;
private static Logger log = Logger.getLogger(ContextForwardServlet.class);
/** The name of the context to which requests are forwarded */
private String forwardContext = "/error-pages";
public void init(ServletConfig config) throws ServletException {
super.init(config);
String param = config.getInitParameter("forwardContext");
if (param != null)
forwardContext = param;
}
/**
* Lookup the ServletContext associated with the forwardContext init-param
* and then obtain a request dispatcher for the request.getPathInfo and
* forward the request. This allows a global servlet mapping to redirect
* requests to a common target.
*
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
if (log.isTraceEnabled()) {
log.trace("[" + forwardContext + "], PathInfo: " + request.getPathInfo() + ", QueryString: "
+ request.getQueryString() + ", ContextPath: " + request.getContextPath() + ", HeaderNames: "
+ request.getHeaderNames() + ", isCommitted: " + response.isCommitted());
}
String path = request.getPathInfo();
ServletContext sc = getServletContext().getContext(forwardContext);
if (sc != null) {
if (log.isTraceEnabled())
log.trace("Found ServletContext for: " + forwardContext);
RequestDispatcher rd = sc.getRequestDispatcher(path);
if (rd != null) {
if (log.isTraceEnabled())
log.trace("Found RequestDispatcher for: " + path);
rd.forward(request, response);
return;
}
}
throw new ServletException("No RequestDispatcher for: " + forwardContext + "/" + path);
}
}