| // |
| // ======================================================================== |
| // 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.server; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.jetty.http.HttpException; |
| import org.eclipse.jetty.http.HttpStatus; |
| import org.eclipse.jetty.io.AsyncEndPoint; |
| 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.SelectChannelEndPoint; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| |
| |
| /* ------------------------------------------------------------ */ |
| /** Asychronous Server HTTP connection |
| * |
| */ |
| public class AsyncHttpConnection extends AbstractHttpConnection implements AsyncConnection |
| { |
| private final static int NO_PROGRESS_INFO = Integer.getInteger("org.mortbay.jetty.NO_PROGRESS_INFO",100); |
| private final static int NO_PROGRESS_CLOSE = Integer.getInteger("org.mortbay.jetty.NO_PROGRESS_CLOSE",200); |
| |
| private static final Logger LOG = Log.getLogger(AsyncHttpConnection.class); |
| private int _total_no_progress; |
| private final AsyncEndPoint _asyncEndp; |
| private boolean _readInterested = true; |
| |
| public AsyncHttpConnection(Connector connector, EndPoint endpoint, Server server) |
| { |
| super(connector,endpoint,server); |
| _asyncEndp=(AsyncEndPoint)endpoint; |
| } |
| |
| @Override |
| public Connection handle() throws IOException |
| { |
| Connection connection = this; |
| boolean some_progress=false; |
| boolean progress=true; |
| |
| try |
| { |
| setCurrentConnection(this); |
| |
| // don't check for idle while dispatched (unless blocking IO is done). |
| _asyncEndp.setCheckForIdle(false); |
| |
| |
| // While progress and the connection has not changed |
| while (progress && connection==this) |
| { |
| progress=false; |
| try |
| { |
| // Handle resumed request |
| if (_request._async.isAsync()) |
| { |
| if (_request._async.isDispatchable()) |
| handleRequest(); |
| } |
| // else Parse more input |
| else if (!_parser.isComplete() && _parser.parseAvailable()) |
| progress=true; |
| |
| // Generate more output |
| if (_generator.isCommitted() && !_generator.isComplete() && !_endp.isOutputShutdown() && !_request.getAsyncContinuation().isAsyncStarted()) |
| if (_generator.flushBuffer()>0) |
| progress=true; |
| |
| // Flush output |
| _endp.flush(); |
| |
| // Has any IO been done by the endpoint itself since last loop |
| if (_asyncEndp.hasProgressed()) |
| progress=true; |
| } |
| catch (HttpException e) |
| { |
| if (LOG.isDebugEnabled()) |
| { |
| LOG.debug("uri="+_uri); |
| LOG.debug("fields="+_requestFields); |
| LOG.debug(e); |
| } |
| progress=true; |
| _generator.sendError(e.getStatus(), e.getReason(), null, true); |
| } |
| finally |
| { |
| some_progress|=progress; |
| // Is this request/response round complete and are fully flushed? |
| boolean parserComplete = _parser.isComplete(); |
| boolean generatorComplete = _generator.isComplete(); |
| boolean complete = parserComplete && generatorComplete; |
| if (parserComplete) |
| { |
| if (generatorComplete) |
| { |
| // Reset the parser/generator |
| progress=true; |
| |
| // look for a switched connection instance? |
| if (_response.getStatus()==HttpStatus.SWITCHING_PROTOCOLS_101) |
| { |
| Connection switched=(Connection)_request.getAttribute("org.eclipse.jetty.io.Connection"); |
| if (switched!=null) |
| connection=switched; |
| } |
| |
| reset(); |
| |
| // TODO Is this still required? |
| if (!_generator.isPersistent() && !_endp.isOutputShutdown()) |
| { |
| LOG.warn("Safety net oshut!!! IF YOU SEE THIS, PLEASE RAISE BUGZILLA"); |
| _endp.shutdownOutput(); |
| } |
| } |
| else |
| { |
| // We have finished parsing, but not generating so |
| // we must not be interested in reading until we |
| // have finished generating and we reset the generator |
| _readInterested = false; |
| LOG.debug("Disabled read interest while writing response {}", _endp); |
| } |
| } |
| |
| if (!complete && _request.getAsyncContinuation().isAsyncStarted()) |
| { |
| // The request is suspended, so even though progress has been made, |
| // exit the while loop by setting progress to false |
| LOG.debug("suspended {}",this); |
| progress=false; |
| } |
| } |
| } |
| } |
| finally |
| { |
| setCurrentConnection(null); |
| |
| // If we are not suspended |
| if (!_request.getAsyncContinuation().isAsyncStarted()) |
| { |
| // return buffers |
| _parser.returnBuffers(); |
| _generator.returnBuffers(); |
| |
| // reenable idle checking unless request is suspended |
| _asyncEndp.setCheckForIdle(true); |
| } |
| |
| // Safety net to catch spinning |
| if (some_progress) |
| _total_no_progress=0; |
| else |
| { |
| _total_no_progress++; |
| if (NO_PROGRESS_INFO>0 && _total_no_progress%NO_PROGRESS_INFO==0 && (NO_PROGRESS_CLOSE<=0 || _total_no_progress< NO_PROGRESS_CLOSE)) |
| LOG.info("EndPoint making no progress: "+_total_no_progress+" "+_endp+" "+this); |
| if (NO_PROGRESS_CLOSE>0 && _total_no_progress==NO_PROGRESS_CLOSE) |
| { |
| LOG.warn("Closing EndPoint making no progress: "+_total_no_progress+" "+_endp+" "+this); |
| if (_endp instanceof SelectChannelEndPoint) |
| ((SelectChannelEndPoint)_endp).getChannel().close(); |
| } |
| } |
| } |
| return connection; |
| } |
| |
| public void onInputShutdown() throws IOException |
| { |
| // If we don't have a committed response and we are not suspended |
| if (_generator.isIdle() && !_request.getAsyncContinuation().isSuspended()) |
| { |
| // then no more can happen, so close. |
| _endp.close(); |
| } |
| |
| // Make idle parser seek EOF |
| if (_parser.isIdle()) |
| _parser.setPersistent(false); |
| } |
| |
| @Override |
| public void reset() |
| { |
| _readInterested = true; |
| LOG.debug("Enabled read interest {}", _endp); |
| super.reset(); |
| } |
| |
| @Override |
| public boolean isSuspended() |
| { |
| return !_readInterested || super.isSuspended(); |
| } |
| } |