CometDEmptyResponseTest.java

/*
 * Copyright (c) 2008-2017 the original author or authors.
 *
 * 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 org.cometd.javascript;

import java.io.IOException;
import java.util.EnumSet;

import javax.servlet.DispatcherType;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.eclipse.jetty.servlet.FilterHolder;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.junit.Assert;
import org.junit.Test;

public class CometDEmptyResponseTest extends AbstractCometDLongPollingTest {
    @Override
    protected void customizeContext(ServletContextHandler context) throws Exception {
        super.customizeContext(context);
        EmptyResponseFilter filter = new EmptyResponseFilter();
        FilterHolder filterHolder = new FilterHolder(filter);
        context.addFilter(filterHolder, cometdServletPath + "/*", EnumSet.of(DispatcherType.REQUEST));
    }

    @Test
    public void testEmptyResponse() throws Exception {
        defineClass(Latch.class);
        evaluateScript("cometd.configure({url: '" + cometdURL + "', logLevel: '" + getLogLevel() + "'});");
        evaluateScript("var handshakeLatch = new Latch(1);");
        Latch handshakeLatch = get("handshakeLatch");
        evaluateScript("var failureLatch = new Latch(1);");
        Latch failureLatch = get("failureLatch");
        evaluateScript("cometd.addListener('/meta/handshake', handshakeLatch, 'countDown');");
        evaluateScript("cometd.addListener('/meta/unsuccessful', failureLatch, 'countDown');");

        evaluateScript("cometd.handshake();");
        Assert.assertTrue(handshakeLatch.await(5000));
        Assert.assertTrue(failureLatch.await(5000));

        evaluateScript("cometd.disconnect(true);");
    }

    public static class EmptyResponseFilter implements Filter {
        @Override
        public void init(FilterConfig filterConfig) throws ServletException {
        }

        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
            doFilter((HttpServletRequest)request, (HttpServletResponse)response, chain);
        }

        private void doFilter(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws IOException, ServletException {
            response.setContentType("application/json;charset=UTF-8");
        }

        @Override
        public void destroy() {
        }
    }
}