/
NotAcceptingTest.java
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/
NotAcceptingTest.java
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//
// ========================================================================
// Copyright (c) 1995-2022 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.server;
import java.io.IOException;
import java.net.Socket;
import java.util.concurrent.Exchanger;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.function.Supplier;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.eclipse.jetty.http.HttpTester;
import org.eclipse.jetty.server.LocalConnector.LocalEndPoint;
import org.eclipse.jetty.server.handler.AbstractHandler;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.log.Log;
import org.hamcrest.Matcher;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Disabled;
import org.junit.jupiter.api.Test;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
import static org.junit.jupiter.api.Assertions.fail;
public class NotAcceptingTest
{
private final long idleTimeout = 2000;
Server server;
LocalConnector localConnector;
ServerConnector blockingConnector;
ServerConnector asyncConnector;
@BeforeEach
public void before()
{
server = new Server();
localConnector = new LocalConnector(server);
localConnector.setIdleTimeout(idleTimeout);
server.addConnector(localConnector);
blockingConnector = new ServerConnector(server, 1, 1);
blockingConnector.setPort(0);
blockingConnector.setIdleTimeout(idleTimeout);
blockingConnector.setAcceptQueueSize(10);
server.addConnector(blockingConnector);
asyncConnector = new ServerConnector(server, 0, 1);
asyncConnector.setPort(0);
asyncConnector.setIdleTimeout(idleTimeout);
asyncConnector.setAcceptQueueSize(10);
server.addConnector(asyncConnector);
}
@AfterEach
public void after() throws Exception
{
server.stop();
server = null;
}
@Test
public void testServerConnectorBlockingAccept() throws Exception
{
TestHandler handler = new TestHandler();
server.setHandler(handler);
server.start();
try (Socket client0 = new Socket("localhost", blockingConnector.getLocalPort());)
{
HttpTester.Input in0 = HttpTester.from(client0.getInputStream());
client0.getOutputStream().write("GET /one HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
String uri = handler.exchange.exchange("data");
assertThat(uri, is("/one"));
HttpTester.Response response = HttpTester.parseResponse(in0);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("data"));
blockingConnector.setAccepting(false);
// 0th connection still working
client0.getOutputStream().write("GET /two HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
uri = handler.exchange.exchange("more data");
assertThat(uri, is("/two"));
response = HttpTester.parseResponse(in0);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("more data"));
try (Socket client1 = new Socket("localhost", blockingConnector.getLocalPort());)
{
// can't stop next connection being accepted
HttpTester.Input in1 = HttpTester.from(client1.getInputStream());
client1.getOutputStream().write("GET /three HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
uri = handler.exchange.exchange("new connection");
assertThat(uri, is("/three"));
response = HttpTester.parseResponse(in1);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("new connection"));
try (Socket client2 = new Socket("localhost", blockingConnector.getLocalPort());)
{
HttpTester.Input in2 = HttpTester.from(client2.getInputStream());
client2.getOutputStream().write("GET /four HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
try
{
uri = handler.exchange.exchange("delayed connection", idleTimeout, TimeUnit.MILLISECONDS);
fail("Failed near URI: " + uri); // this displays last URI, not current (obviously)
}
catch (TimeoutException e)
{
// Can we accept the original?
blockingConnector.setAccepting(true);
uri = handler.exchange.exchange("delayed connection");
assertThat(uri, is("/four"));
response = HttpTester.parseResponse(in2);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("delayed connection"));
}
}
}
}
}
@Test
@Disabled
public void testLocalConnector() throws Exception
{
server.setHandler(new HelloHandler());
server.start();
try (LocalEndPoint client0 = localConnector.connect())
{
client0.addInputAndExecute(BufferUtil.toBuffer("GET /one HTTP/1.1\r\nHost:localhost\r\n\r\n"));
HttpTester.Response response = HttpTester.parseResponse(client0.getResponse());
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("Hello\n"));
localConnector.setAccepting(false);
// 0th connection still working
client0.addInputAndExecute(BufferUtil.toBuffer("GET /two HTTP/1.1\r\nHost:localhost\r\n\r\n"));
response = HttpTester.parseResponse(client0.getResponse());
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("Hello\n"));
LocalEndPoint[] local = new LocalEndPoint[10];
for (int i = 0; i < 10; i++)
{
try (LocalEndPoint client = localConnector.connect())
{
try
{
local[i] = client;
client.addInputAndExecute(BufferUtil.toBuffer("GET /three HTTP/1.1\r\nHost:localhost\r\n\r\n"));
response = HttpTester.parseResponse(client.getResponse(false, idleTimeout, TimeUnit.MILLISECONDS));
// A few local connections may succeed
if (i == local.length - 1)
// but not 10 of them!
fail("Expected TimeoutException");
}
catch (TimeoutException e)
{
// A connection finally failed!
break;
}
}
}
// 0th connection still working
client0.addInputAndExecute(BufferUtil.toBuffer("GET /four HTTP/1.1\r\nHost:localhost\r\n\r\n"));
response = HttpTester.parseResponse(client0.getResponse());
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("Hello\n"));
localConnector.setAccepting(true);
// New connection working again
try (LocalEndPoint client = localConnector.connect())
{
client.addInputAndExecute(BufferUtil.toBuffer("GET /five HTTP/1.1\r\nHost:localhost\r\n\r\n"));
response = HttpTester.parseResponse(client.getResponse());
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("Hello\n"));
}
}
}
@Test
public void testServerConnectorAsyncAccept() throws Exception
{
TestHandler handler = new TestHandler();
server.setHandler(handler);
server.start();
try (Socket client0 = new Socket("localhost", asyncConnector.getLocalPort());)
{
HttpTester.Input in0 = HttpTester.from(client0.getInputStream());
client0.getOutputStream().write("GET /one HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
String uri = handler.exchange.exchange("data");
assertThat(uri, is("/one"));
HttpTester.Response response = HttpTester.parseResponse(in0);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("data"));
asyncConnector.setAccepting(false);
// 0th connection still working
client0.getOutputStream().write("GET /two HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
uri = handler.exchange.exchange("more data");
assertThat(uri, is("/two"));
response = HttpTester.parseResponse(in0);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("more data"));
try (Socket client1 = new Socket("localhost", asyncConnector.getLocalPort());)
{
HttpTester.Input in1 = HttpTester.from(client1.getInputStream());
client1.getOutputStream().write("GET /three HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
try
{
uri = handler.exchange.exchange("delayed connection", idleTimeout, TimeUnit.MILLISECONDS);
fail(uri);
}
catch (TimeoutException e)
{
// Can we accept the original?
asyncConnector.setAccepting(true);
uri = handler.exchange.exchange("delayed connection");
assertThat(uri, is("/three"));
response = HttpTester.parseResponse(in1);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is("delayed connection"));
}
}
}
}
public static class TestHandler extends AbstractHandler
{
final Exchanger<String> exchange = new Exchanger<>();
transient int handled;
public TestHandler()
{
}
@Override
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
{
try
{
String content = exchange.exchange(baseRequest.getRequestURI());
baseRequest.setHandled(true);
handled++;
response.setContentType("text/html;charset=utf-8");
response.setStatus(HttpServletResponse.SC_OK);
response.getWriter().print(content);
}
catch (InterruptedException e)
{
throw new ServletException(e);
}
}
public int getHandled()
{
return handled;
}
}
@Test
public void testAcceptRateLimit() throws Exception
{
AcceptRateLimit limit = new AcceptRateLimit(4, 1, TimeUnit.HOURS, server);
server.addBean(limit);
server.setHandler(new HelloHandler());
server.start();
try (
Socket async0 = new Socket("localhost", asyncConnector.getLocalPort());
Socket async1 = new Socket("localhost", asyncConnector.getLocalPort());
Socket async2 = new Socket("localhost", asyncConnector.getLocalPort());
)
{
String expectedContent = "Hello" + System.lineSeparator();
for (Socket client : new Socket[]{async2})
{
HttpTester.Input in = HttpTester.from(client.getInputStream());
client.getOutputStream().write("GET /test HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
HttpTester.Response response = HttpTester.parseResponse(in);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is(expectedContent));
}
assertThat(localConnector.isAccepting(), is(true));
assertThat(blockingConnector.isAccepting(), is(true));
assertThat(asyncConnector.isAccepting(), is(true));
}
limit.age(45, TimeUnit.MINUTES);
try (
Socket async0 = new Socket("localhost", asyncConnector.getLocalPort());
Socket async1 = new Socket("localhost", asyncConnector.getLocalPort());
)
{
String expectedContent = "Hello" + System.lineSeparator();
for (Socket client : new Socket[]{async1})
{
HttpTester.Input in = HttpTester.from(client.getInputStream());
client.getOutputStream().write("GET /test HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
HttpTester.Response response = HttpTester.parseResponse(in);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is(expectedContent));
}
assertThat(localConnector.isAccepting(), is(false));
assertThat(blockingConnector.isAccepting(), is(false));
assertThat(asyncConnector.isAccepting(), is(false));
}
limit.age(45, TimeUnit.MINUTES);
assertThat(localConnector.isAccepting(), is(false));
assertThat(blockingConnector.isAccepting(), is(false));
assertThat(asyncConnector.isAccepting(), is(false));
limit.run();
assertThat(localConnector.isAccepting(), is(true));
assertThat(blockingConnector.isAccepting(), is(true));
assertThat(asyncConnector.isAccepting(), is(true));
}
@Test
public void testConnectionLimit() throws Exception
{
server.addBean(new ConnectionLimit(9, server));
server.setHandler(new HelloHandler());
server.start();
Log.getLogger(ConnectionLimit.class).debug("CONNECT:");
try (
LocalEndPoint local0 = localConnector.connect();
LocalEndPoint local1 = localConnector.connect();
LocalEndPoint local2 = localConnector.connect();
Socket blocking0 = new Socket("localhost", blockingConnector.getLocalPort());
Socket blocking1 = new Socket("localhost", blockingConnector.getLocalPort());
Socket blocking2 = new Socket("localhost", blockingConnector.getLocalPort());
Socket async0 = new Socket("localhost", asyncConnector.getLocalPort());
Socket async1 = new Socket("localhost", asyncConnector.getLocalPort());
Socket async2 = new Socket("localhost", asyncConnector.getLocalPort());
)
{
String expectedContent = "Hello" + System.lineSeparator();
Log.getLogger(ConnectionLimit.class).debug("LOCAL:");
for (LocalEndPoint client : new LocalEndPoint[]{local0, local1, local2})
{
client.addInputAndExecute(BufferUtil.toBuffer("GET /test HTTP/1.1\r\nHost:localhost\r\n\r\n"));
HttpTester.Response response = HttpTester.parseResponse(client.getResponse());
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is(expectedContent));
}
Log.getLogger(ConnectionLimit.class).debug("NETWORK:");
for (Socket client : new Socket[]{blocking0, blocking1, blocking2, async0, async1, async2})
{
HttpTester.Input in = HttpTester.from(client.getInputStream());
client.getOutputStream().write("GET /test HTTP/1.1\r\nHost:localhost\r\n\r\n".getBytes());
HttpTester.Response response = HttpTester.parseResponse(in);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is(expectedContent));
}
assertThat(localConnector.isAccepting(), is(false));
assertThat(blockingConnector.isAccepting(), is(false));
assertThat(asyncConnector.isAccepting(), is(false));
{
// Close a async connection
HttpTester.Input in = HttpTester.from(async1.getInputStream());
async1.getOutputStream().write("GET /test HTTP/1.1\r\nHost:localhost\r\nConnection: close\r\n\r\n".getBytes());
HttpTester.Response response = HttpTester.parseResponse(in);
assertThat(response.getStatus(), is(200));
assertThat(response.getContent(), is(expectedContent));
}
}
waitFor(localConnector::isAccepting, is(true), 2 * idleTimeout, TimeUnit.MILLISECONDS);
waitFor(blockingConnector::isAccepting, is(true), 2 * idleTimeout, TimeUnit.MILLISECONDS);
waitFor(asyncConnector::isAccepting, is(true), 2 * idleTimeout, TimeUnit.MILLISECONDS);
}
public static class HelloHandler extends AbstractHandler
{
public HelloHandler()
{
}
@Override
public void handle(String target, Request baseRequest, HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException
{
baseRequest.setHandled(true);
response.setContentType("text/html;charset=utf-8");
response.setStatus(HttpServletResponse.SC_OK);
response.getWriter().println("Hello");
}
}
public static <T> void waitFor(Supplier<T> value, Matcher<T> matcher, long wait, TimeUnit units)
{
long start = System.nanoTime();
while (true)
{
try
{
matcher.matches(value.get());
return;
}
catch (Throwable e)
{
if ((System.nanoTime() - start) > units.toNanos(wait))
throw e;
}
try
{
TimeUnit.MILLISECONDS.sleep(50);
}
catch (InterruptedException e)
{
// no op
}
}
}
}