org.eclipse.jetty.client.AsyncHttpConnection Maven / Gradle / Ivy
//
// ========================================================================
// 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.client;
import java.io.IOException;
import org.eclipse.jetty.http.AbstractGenerator;
import org.eclipse.jetty.http.HttpStatus;
import org.eclipse.jetty.io.AsyncEndPoint;
import org.eclipse.jetty.io.Buffer;
import org.eclipse.jetty.io.Buffers;
import org.eclipse.jetty.io.Connection;
import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.io.nio.AsyncConnection;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/* ------------------------------------------------------------ */
/** Asynchronous Client HTTP Connection
*/
public class AsyncHttpConnection extends AbstractHttpConnection implements AsyncConnection
{
private static final Logger LOG = Log.getLogger(AsyncHttpConnection.class);
private boolean _requestComplete;
private Buffer _requestContentChunk;
private final AsyncEndPoint _asyncEndp;
AsyncHttpConnection(Buffers requestBuffers, Buffers responseBuffers, EndPoint endp)
{
super(requestBuffers,responseBuffers,endp);
_asyncEndp=(AsyncEndPoint)endp;
}
protected void reset() throws IOException
{
_requestComplete = false;
super.reset();
}
public Connection handle() throws IOException
{
Connection connection = this;
boolean progress=true;
try
{
boolean failed = false;
// While we are making progress and have not changed connection
while (progress && connection==this)
{
LOG.debug("while open={} more={} progress={}",_endp.isOpen(),_parser.isMoreInBuffer(),progress);
progress=false;
HttpExchange exchange=_exchange;
LOG.debug("exchange {} on {}",exchange,this);
try
{
// Should we commit the request?
if (!_generator.isCommitted() && exchange!=null && exchange.getStatus() == HttpExchange.STATUS_WAITING_FOR_COMMIT)
{
LOG.debug("commit {}",exchange);
progress=true;
commitRequest();
}
// Generate output
if (_generator.isCommitted() && !_generator.isComplete())
{
if (_generator.flushBuffer()>0)
{
LOG.debug("flushed");
progress=true;
}
// Is there more content to send or should we complete the generator
if (_generator.isState(AbstractGenerator.STATE_CONTENT))
{
// Look for more content to send.
if (_requestContentChunk==null)
_requestContentChunk = exchange.getRequestContentChunk(null);
if (_requestContentChunk==null)
{
LOG.debug("complete {}",exchange);
progress=true;
_generator.complete();
if (exchange.getStatus() < HttpExchange.STATUS_WAITING_FOR_RESPONSE)
exchange.setStatus(HttpExchange.STATUS_WAITING_FOR_RESPONSE);
}
else if (_generator.isEmpty())
{
LOG.debug("addChunk");
progress=true;
Buffer chunk=_requestContentChunk;
_requestContentChunk=exchange.getRequestContentChunk(null);
_generator.addContent(chunk,_requestContentChunk==null);
if (_requestContentChunk==null)
exchange.setStatus(HttpExchange.STATUS_WAITING_FOR_RESPONSE);
}
}
}
// Signal request completion
if (_generator.isComplete() && !_requestComplete)
{
LOG.debug("requestComplete {}",exchange);
progress=true;
_requestComplete = true;
exchange.getEventListener().onRequestComplete();
}
// Read any input that is available
if (!_parser.isComplete() && _parser.parseAvailable())
{
LOG.debug("parsed {}",exchange);
progress=true;
}
// Flush output
_endp.flush();
// Has any IO been done by the endpoint itself since last loop
if (_asyncEndp.hasProgressed())
{
LOG.debug("hasProgressed {}",exchange);
progress=true;
}
}
catch (Throwable e)
{
LOG.debug("Failure on " + _exchange, e);
failed = true;
synchronized (this)
{
if (exchange != null)
{
// Cancelling the exchange causes an exception as we close the connection,
// but we don't report it as it is normal cancelling operation
if (exchange.getStatus() != HttpExchange.STATUS_CANCELLING &&
exchange.getStatus() != HttpExchange.STATUS_CANCELLED &&
!exchange.isDone())
{
if (exchange.setStatus(HttpExchange.STATUS_EXCEPTED))
exchange.getEventListener().onException(e);
}
}
else
{
if (e instanceof IOException)
throw (IOException)e;
if (e instanceof Error)
throw (Error)e;
if (e instanceof RuntimeException)
throw (RuntimeException)e;
throw new RuntimeException(e);
}
}
}
finally
{
LOG.debug("finally {} on {} progress={} {}",exchange,this,progress,_endp);
boolean complete = failed || _generator.isComplete() && _parser.isComplete();
if (complete)
{
boolean persistent = !failed && _parser.isPersistent() && _generator.isPersistent();
_generator.setPersistent(persistent);
reset();
if (persistent)
_endp.setMaxIdleTime((int)_destination.getHttpClient().getIdleTimeout());
synchronized (this)
{
exchange=_exchange;
_exchange = null;
// Cancel the exchange
if (exchange!=null)
{
exchange.cancelTimeout(_destination.getHttpClient());
// TODO should we check the exchange is done?
}
// handle switched protocols
if (_status==HttpStatus.SWITCHING_PROTOCOLS_101)
{
Connection switched=exchange.onSwitchProtocol(_endp);
if (switched!=null)
{
// switched protocol!
if (_pipeline!=null)
{
_destination.send(_pipeline);
}
_pipeline = null;
connection=switched;
}
}
// handle pipelined requests
if (_pipeline!=null)
{
if (!persistent || connection!=this)
_destination.send(_pipeline);
else
_exchange=_pipeline;
_pipeline=null;
}
if (_exchange==null && !isReserved()) // TODO how do we return switched connections?
_destination.returnConnection(this, !persistent);
}
}
}
}
}
finally
{
_parser.returnBuffers();
_generator.returnBuffers();
LOG.debug("unhandle {} on {}",_exchange,_endp);
}
return connection;
}
public void onInputShutdown() throws IOException
{
if (_generator.isIdle())
_endp.shutdownOutput();
}
@Override
public boolean send(HttpExchange ex) throws IOException
{
boolean sent=super.send(ex);
if (sent)
_asyncEndp.asyncDispatch();
return sent;
}
}