/**
* Copyright 2015 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS-IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.apphosting.tests.usercode.testservlets;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Trigger subrequests via RequestDispatcher.
*
*/
public class RequestDispatcherServlet extends HttpServlet {
public void service(HttpServletRequest req, HttpServletResponse res)
throws IOException, ServletException {
RequestDispatcher dispatcher = getDispatcher(req);
String type = req.getParameter("type");
if ("include".equals(type)) {
dispatcher.include(req, res);
} else if ("forward".equals(type)) {
dispatcher.forward(req, res);
} else {
throw new ServletException("Unknown type parameter: " + type);
}
}
private RequestDispatcher getDispatcher(HttpServletRequest req) throws ServletException {
String name = req.getParameter("name");
if (name != null) {
return getServletContext().getNamedDispatcher(name);
}
String url = req.getParameter("url");
if (url != null) {
return getServletContext().getRequestDispatcher(url);
}
throw new ServletException("Must specify an url or a name.");
}
}