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//
// ========================================================================
// Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// 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.servlets;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import javax.servlet.http.HttpServletRequest;
import org.eclipse.jetty.server.NetworkConnector;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class EventSourceServletTest
{
private Server server;
private NetworkConnector connector;
private ServletContextHandler context;
@Before
public void startServer() throws Exception
{
server = new Server(0);
connector = (NetworkConnector)server.getConnectors()[0];
String contextPath = "/test";
context = new ServletContextHandler(server, contextPath, ServletContextHandler.SESSIONS);
server.start();
}
@After
public void stopServer() throws Exception
{
if (server != null)
server.stop();
}
@Test
public void testBasicFunctionality() throws Exception
{
final AtomicReference<EventSource.Emitter> emitterRef = new AtomicReference<EventSource.Emitter>();
final CountDownLatch emitterLatch = new CountDownLatch(1);
final CountDownLatch closeLatch = new CountDownLatch(1);
class S extends EventSourceServlet
{
@Override
protected EventSource newEventSource(HttpServletRequest request)
{
return new EventSource()
{
public void onOpen(Emitter emitter) throws IOException
{
emitterRef.set(emitter);
emitterLatch.countDown();
}
public void onClose()
{
closeLatch.countDown();
}
};
}
}
String servletPath = "/eventsource";
ServletHolder servletHolder = new ServletHolder(new S());
int heartBeatPeriod = 2;
servletHolder.setInitParameter("heartBeatPeriod", String.valueOf(heartBeatPeriod));
context.addServlet(servletHolder, servletPath);
Socket socket = new Socket("localhost", connector.getLocalPort());
writeHTTPRequest(socket, servletPath);
BufferedReader reader = readAndDiscardHTTPResponse(socket);
Assert.assertTrue(emitterLatch.await(1, TimeUnit.SECONDS));
EventSource.Emitter emitter = emitterRef.get();
Assert.assertNotNull(emitter);
String data = "foo";
emitter.data(data);
String line = reader.readLine();
String received = "";
while (line != null)
{
received += line;
if (line.length() == 0)
break;
line = reader.readLine();
}
Assert.assertEquals("data: " + data, received);
socket.close();
Assert.assertTrue(closeLatch.await(heartBeatPeriod * 3, TimeUnit.SECONDS));
}
@Test
public void testServerSideClose() throws Exception
{
final AtomicReference<EventSource.Emitter> emitterRef = new AtomicReference<EventSource.Emitter>();
final CountDownLatch emitterLatch = new CountDownLatch(1);
class S extends EventSourceServlet
{
@Override
protected EventSource newEventSource(HttpServletRequest request)
{
return new EventSource()
{
public void onOpen(Emitter emitter) throws IOException
{
emitterRef.set(emitter);
emitterLatch.countDown();
}
public void onClose()
{
}
};
}
}
String servletPath = "/eventsource";
context.addServlet(new ServletHolder(new S()), servletPath);
Socket socket = new Socket("localhost", connector.getLocalPort());
writeHTTPRequest(socket, servletPath);
BufferedReader reader = readAndDiscardHTTPResponse(socket);
Assert.assertTrue(emitterLatch.await(1, TimeUnit.SECONDS));
EventSource.Emitter emitter = emitterRef.get();
Assert.assertNotNull(emitter);
String comment = "foo";
emitter.comment(comment);
String line = reader.readLine();
String received = "";
while (line != null)
{
received += line;
if (line.length() == 0)
break;
line = reader.readLine();
}
Assert.assertEquals(": " + comment, received);
emitter.close();
line = reader.readLine();
Assert.assertNull(line);
socket.close();
}
@Test
public void testEncoding() throws Exception
{
// The EURO symbol
final String data = "\u20AC";
class S extends EventSourceServlet
{
@Override
protected EventSource newEventSource(HttpServletRequest request)
{
return new EventSource()
{
public void onOpen(Emitter emitter) throws IOException
{
emitter.data(data);
}
public void onClose()
{
}
};
}
}
String servletPath = "/eventsource";
context.addServlet(new ServletHolder(new S()), servletPath);
Socket socket = new Socket("localhost", connector.getLocalPort());
writeHTTPRequest(socket, servletPath);
BufferedReader reader = readAndDiscardHTTPResponse(socket);
String line = reader.readLine();
String received = "";
while (line != null)
{
received += line;
if (line.length() == 0)
break;
line = reader.readLine();
}
Assert.assertEquals("data: " + data, received);
socket.close();
}
@Test
public void testMultiLineData() throws Exception
{
String data1 = "data1";
String data2 = "data2";
String data3 = "data3";
String data4 = "data4";
final String data = data1 + "\r\n" + data2 + "\r" + data3 + "\n" + data4;
class S extends EventSourceServlet
{
@Override
protected EventSource newEventSource(HttpServletRequest request)
{
return new EventSource()
{
public void onOpen(Emitter emitter) throws IOException
{
emitter.data(data);
}
public void onClose()
{
}
};
}
}
String servletPath = "/eventsource";
context.addServlet(new ServletHolder(new S()), servletPath);
Socket socket = new Socket("localhost", connector.getLocalPort());
writeHTTPRequest(socket, servletPath);
BufferedReader reader = readAndDiscardHTTPResponse(socket);
String line1 = reader.readLine();
Assert.assertEquals("data: " + data1, line1);
String line2 = reader.readLine();
Assert.assertEquals("data: " + data2, line2);
String line3 = reader.readLine();
Assert.assertEquals("data: " + data3, line3);
String line4 = reader.readLine();
Assert.assertEquals("data: " + data4, line4);
String line5 = reader.readLine();
Assert.assertEquals(0, line5.length());
socket.close();
}
@Test
public void testEvents() throws Exception
{
final String name = "event1";
final String data = "data2";
class S extends EventSourceServlet
{
@Override
protected EventSource newEventSource(HttpServletRequest request)
{
return new EventSource()
{
public void onOpen(Emitter emitter) throws IOException
{
emitter.event(name, data);
}
public void onClose()
{
}
};
}
}
String servletPath = "/eventsource";
context.addServlet(new ServletHolder(new S()), servletPath);
Socket socket = new Socket("localhost", connector.getLocalPort());
writeHTTPRequest(socket, servletPath);
BufferedReader reader = readAndDiscardHTTPResponse(socket);
String line1 = reader.readLine();
Assert.assertEquals("event: " + name, line1);
String line2 = reader.readLine();
Assert.assertEquals("data: " + data, line2);
String line3 = reader.readLine();
Assert.assertEquals(0, line3.length());
socket.close();
}
private void writeHTTPRequest(Socket socket, String servletPath) throws IOException
{
int serverPort = socket.getPort();
OutputStream output = socket.getOutputStream();
String handshake = "";
handshake += "GET " + context.getContextPath() + servletPath + " HTTP/1.1\r\n";
handshake += "Host: localhost:" + serverPort + "\r\n";
handshake += "Accept: text/event-stream\r\n";
handshake += "\r\n";
output.write(handshake.getBytes("UTF-8"));
output.flush();
}
private BufferedReader readAndDiscardHTTPResponse(Socket socket) throws IOException
{
// Read and discard the HTTP response
InputStream input = socket.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input, "UTF-8"));
String line = reader.readLine();
while (line != null)
{
if (line.length() == 0)
break;
line = reader.readLine();
}
// Now we can parse the event-source stream
return reader;
}
}
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