| // |
| // ======================================================================== |
| // Copyright (c) 1995-2014 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; |
| } |
| } |