//
//  ========================================================================
//  Copyright (c) 1995-2020 Mort Bay Consulting Pty Ltd and others.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.servlet;

import java.io.IOException;
import javax.servlet.AsyncContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.LocalConnector;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.handler.DefaultHandler;
import org.eclipse.jetty.server.handler.HandlerList;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

/**
 * This tests verifies that merging of queryStrings works when dispatching
 * Requests via {@link AsyncContext} multiple times.
 */
public class AsyncContextDispatchWithQueryStrings {

        private Server _server = new Server();
        private ServletContextHandler _contextHandler = new ServletContextHandler(ServletContextHandler.NO_SESSIONS);
        private LocalConnector _connector = new LocalConnector(_server);

        @Before
        public void setUp() throws Exception {
                _connector.setIdleTimeout(30000);
                _server.setConnectors(new Connector[] { _connector });

                _contextHandler.setContextPath("/");
                _contextHandler.addServlet(new ServletHolder(new TestServlet()), "/initialCall");
                _contextHandler.addServlet(new ServletHolder(new TestServlet()), "/firstDispatchWithNewQueryString");
                _contextHandler.addServlet(new ServletHolder(new TestServlet()), "/secondDispatchNewValueForExistingQueryString");

                HandlerList handlers = new HandlerList();
                handlers.setHandlers(new Handler[] { _contextHandler, new DefaultHandler() });

                _server.setHandler(handlers);
                _server.start();
        }

        @Test
        public void testMultipleDispatchesWithNewQueryStrings() throws Exception {
                String request = "GET /initialCall?initialParam=right HTTP/1.1\r\n" + "Host: localhost\r\n" + "Content-Type: application/x-www-form-urlencoded\r\n"
                                + "Connection: close\r\n" + "\r\n";
                String responseString = _connector.getResponses(request);
                assertTrue("Not the expected response. Check STDOUT for details.", responseString.startsWith("HTTP/1.1 200"));
        }

        @After
        public void tearDown() throws Exception {
                _server.stop();
                _server.join();
        }

        private class TestServlet extends HttpServlet {
                private static final long serialVersionUID = 1L;

                @Override
                protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
                        String path = request.getRequestURI();
                        String queryString = request.getQueryString();
                        if ("/initialCall".equals(path)) 
                        {
                            AsyncContext async = request.startAsync();
                            async.dispatch("/firstDispatchWithNewQueryString?newQueryString=initialValue");
                            assertEquals("initialParam=right", queryString);
                        } 
                        else if ("/firstDispatchWithNewQueryString".equals(path)) 
                        {
                            AsyncContext async = request.startAsync();
                            async.dispatch("/secondDispatchNewValueForExistingQueryString?newQueryString=newValue");
                            assertEquals("newQueryString=initialValue&initialParam=right", queryString);
                        } 
                        else 
                        {
                            response.setContentType("text/html");
                            response.setStatus(HttpServletResponse.SC_OK);
                            response.getWriter().println("<h1>woohhooooo</h1>");
                            assertEquals("newQueryString=newValue&initialParam=right", queryString);
                        }
                }
        }
}
