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//
// ========================================================================
// Copyright (c) 1995-2015 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.server.handler.gzip;
import java.io.IOException;
import javax.servlet.AsyncContext;
import javax.servlet.AsyncEvent;
import javax.servlet.AsyncListener;
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 org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/**
* Filter that merely manipulates the AsyncContext.
* <p>
* The pattern of manipulation is modeled after how DOSFilter behaves. The purpose of this filter is to test arbitrary filter chains that could see unintended
* side-effects of async context manipulation.
*/
public class AsyncManipFilter implements Filter, AsyncListener
{
private static final Logger LOG = Log.getLogger(AsyncManipFilter.class);
private static final String MANIP_KEY = AsyncManipFilter.class.getName();
@Override
public void init(FilterConfig filterConfig) throws ServletException
{
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
LOG.debug("doFilter() - {}", chain);
AsyncContext ctx = (AsyncContext)request.getAttribute(MANIP_KEY);
if (ctx == null)
{
LOG.debug("Initial pass through: {}", chain);
ctx = request.startAsync();
ctx.addListener(this);
ctx.setTimeout(1000);
LOG.debug("AsyncContext: {}", ctx);
request.setAttribute(MANIP_KEY,ctx);
return;
}
else
{
LOG.debug("Second pass through: {}", chain);
chain.doFilter(request,response);
}
}
@Override
public void destroy()
{
}
@Override
public void onComplete(AsyncEvent event) throws IOException
{
LOG.debug("onComplete() {}",event);
}
@Override
public void onTimeout(AsyncEvent event) throws IOException
{
LOG.debug("onTimeout() {}",event.getAsyncContext());
event.getAsyncContext().dispatch();
}
@Override
public void onError(AsyncEvent event) throws IOException
{
LOG.debug("onError()",event.getThrowable());
}
@Override
public void onStartAsync(AsyncEvent event) throws IOException
{
LOG.debug("onTimeout() {}",event);
}
}
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