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package org.eclipse.jetty.client;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InterruptedIOException;
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.io.nio.SslSelectChannelEndPoint;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
public class AsyncHttpConnection extends AbstractHttpConnection implements AsyncConnection
{
private static final Logger LOG = Log.getLogger(AsyncHttpConnection.class);
private Buffer _requestContentChunk;
private boolean _requestComplete;
private int _status;
AsyncHttpConnection(Buffers requestBuffers, Buffers responseBuffers, EndPoint endp)
{
super(requestBuffers,responseBuffers,endp);
}
protected void reset(boolean returnBuffers) throws IOException
{
_requestComplete = false;
super.reset(returnBuffers);
}
public Connection handle() throws IOException
{
try
{
boolean progress=true;
boolean failed = false;
// While the endpoint is open
// AND we have more characters to read OR we made some progress
while (_endp.isOpen() &&
(_parser.isMoreInBuffer() || _endp.isBufferingInput() || progress))
{
// If no exchange, skipCRLF or close on unexpected characters
HttpExchange exchange;
synchronized (this)
{
exchange=_exchange;
}
if (exchange == null)
{
long filled = _parser.fill();
if (filled < 0)
close();
else
{
// Hopefully just space?
_parser.skipCRLF();
if (_parser.isMoreInBuffer())
{
LOG.warn("Unexpected data received but no request sent");
close();
}
}
return this;
}
try
{
if (exchange.getStatus() == HttpExchange.STATUS_WAITING_FOR_COMMIT)
{
progress=true;
commitRequest();
}
_endp.flush();
if (_generator.isComplete())
{
if (!_requestComplete)
{
_requestComplete = true;
exchange.getEventListener().onRequestComplete();
}
}
else
{
long flushed = _generator.flushBuffer();
progress|=(flushed>0);
if (_generator.isComplete())
{
InputStream in = exchange.getRequestContentSource();
if (in != null)
{
if (_requestContentChunk == null || _requestContentChunk.length() == 0)
{
_requestContentChunk = _exchange.getRequestContentChunk();
if (_requestContentChunk != null)
_generator.addContent(_requestContentChunk,false);
else
_generator.complete();
flushed = _generator.flushBuffer();
progress|=(flushed>0);
}
}
else
_generator.complete();
}
else
_generator.complete();
}
if (_generator.isComplete() && !_requestComplete)
{
_requestComplete = true;
_exchange.getEventListener().onRequestComplete();
}
// If we are not ended then parse available
if (!_parser.isComplete() && (_generator.isComplete() || _generator.isCommitted() && !_endp.isBlocking()))
{
if (_parser.parseAvailable())
progress=true;
if (_parser.isIdle() && (_endp.isInputShutdown() || !_endp.isOpen()))
throw new EOFException();
}
}
catch (Throwable e)
{
LOG.debug("Failure on " + _exchange, e);
if (e instanceof ThreadDeath)
throw (ThreadDeath)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.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
{
boolean complete = false;
boolean close = failed; // always close the connection on error
if (!failed)
{
// are we complete?
if (_generator.isComplete())
{
if (!_requestComplete)
{
_requestComplete = true;
_exchange.getEventListener().onRequestComplete();
}
// we need to return the HttpConnection to a state that
// it can be reused or closed out
if (_parser.isComplete())
{
_exchange.cancelTimeout(_destination.getHttpClient());
complete = true;
}
}
// if the endpoint is closed, but the parser incomplete
if (!_endp.isOpen() && !(_parser.isComplete()||_parser.isIdle()))
{
// we wont be called again so let the parser see the close
complete=true;
_parser.parseAvailable();
// TODO should not need this
if (!(_parser.isComplete()||_parser.isIdle()))
{
LOG.warn("Incomplete {} {}",_parser,_endp);
if (_exchange!=null && !_exchange.isDone())
{
_exchange.setStatus(HttpExchange.STATUS_EXCEPTED);
_exchange.getEventListener().onException(new EOFException("Incomplete"));
}
}
}
}
if (_endp.isInputShutdown() && !_parser.isComplete() && !_parser.isIdle())
{
if (_exchange!=null && !_exchange.isDone())
{
_exchange.setStatus(HttpExchange.STATUS_EXCEPTED);
_exchange.getEventListener().onException(new EOFException("Incomplete"));
}
_endp.close();
}
if (complete || failed)
{
synchronized (this)
{
if (!close)
close = shouldClose();
reset(true);
progress=true;
if (_exchange != null)
{
exchange=_exchange;
_exchange = null;
// Reset the maxIdleTime because it may have been changed
if (!close)
_endp.setMaxIdleTime((int)_destination.getHttpClient().getIdleTimeout());
if (_status==HttpStatus.SWITCHING_PROTOCOLS_101)
{
Connection switched=exchange.onSwitchProtocol(_endp);
if (switched!=null)
{
// switched protocol!
exchange = _pipeline;
_pipeline = null;
if (exchange!=null)
_destination.send(exchange);
return switched;
}
}
if (_pipeline == null)
{
if (!isReserved())
_destination.returnConnection(this, close);
}
else
{
if (close)
{
if (!isReserved())
_destination.returnConnection(this,close);
exchange = _pipeline;
_pipeline = null;
_destination.send(exchange);
}
else
{
exchange = _pipeline;
_pipeline = null;
send(exchange);
}
}
}
}
}
}
}
}
finally
{
_parser.returnBuffers();
// Do we have more stuff to write?
if (!_generator.isComplete() && _generator.getBytesBuffered()>0 && _endp.isOpen() && _endp instanceof AsyncEndPoint)
{
// Assume we are write blocked!
((AsyncEndPoint)_endp).scheduleWrite();
}
}
return this;
}
public void onInputShutdown() throws IOException
{
// TODO
}
}
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