org.eclipse.jetty.client.HttpConnection Maven / Gradle / Ivy
// ========================================================================
// Copyright (c) 2006-2009 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 java.io.InputStream;
import java.io.InterruptedIOException;
import java.util.concurrent.atomic.AtomicBoolean;
import org.eclipse.jetty.client.security.Authorization;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpGenerator;
import org.eclipse.jetty.http.HttpHeaderValues;
import org.eclipse.jetty.http.HttpHeaders;
import org.eclipse.jetty.http.HttpParser;
import org.eclipse.jetty.http.HttpSchemes;
import org.eclipse.jetty.http.HttpVersions;
import org.eclipse.jetty.http.ssl.SslSelectChannelEndPoint;
import org.eclipse.jetty.io.Buffer;
import org.eclipse.jetty.io.Buffers;
import org.eclipse.jetty.io.ByteArrayBuffer;
import org.eclipse.jetty.io.Connection;
import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.io.nio.SelectChannelEndPoint;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.thread.Timeout;
/**
*
* @version $Revision: 879 $ $Date: 2009-09-11 16:13:28 +0200 (Fri, 11 Sep 2009) $
*/
public class HttpConnection implements Connection
{
private HttpDestination _destination;
private EndPoint _endp;
private HttpGenerator _generator;
private HttpParser _parser;
private boolean _http11 = true;
private Buffer _connectionHeader;
private Buffer _requestContentChunk;
private boolean _requestComplete;
private boolean _reserved;
// The current exchange waiting for a response
private volatile HttpExchange _exchange;
private HttpExchange _pipeline;
private final Timeout.Task _timeout = new TimeoutTask();
private AtomicBoolean _idle = new AtomicBoolean(false);
public void dump() throws IOException
{
Log.info("endp=" + _endp + " " + _endp.isBufferingInput() + " " + _endp.isBufferingOutput());
Log.info("generator=" + _generator);
Log.info("parser=" + _parser.getState() + " " + _parser.isMoreInBuffer());
Log.info("exchange=" + _exchange);
if (_endp instanceof SslSelectChannelEndPoint)
((SslSelectChannelEndPoint)_endp).dump();
}
HttpConnection(Buffers requestBuffers, Buffers responseBuffers, EndPoint endp)
{
_endp = endp;
_generator = new HttpGenerator(requestBuffers,endp);
_parser = new HttpParser(responseBuffers,endp,new Handler());
}
public long getTimeStamp()
{
return -1;
}
public void setReserved (boolean reserved)
{
_reserved = reserved;
}
public boolean isReserved()
{
return _reserved;
}
public HttpDestination getDestination()
{
return _destination;
}
public void setDestination(HttpDestination destination)
{
_destination = destination;
}
public boolean send(HttpExchange ex) throws IOException
{
synchronized (this)
{
if (_exchange != null)
{
if (_pipeline != null)
throw new IllegalStateException(this + " PIPELINED!!! _exchange=" + _exchange);
_pipeline = ex;
return true;
}
if (!_endp.isOpen())
return false;
_exchange = ex;
_exchange.setStatus(HttpExchange.STATUS_WAITING_FOR_COMMIT);
if (_endp.isBlocking())
{
this.notify();
}
else
{
SelectChannelEndPoint scep = (SelectChannelEndPoint)_endp;
scep.scheduleWrite();
}
_destination.getHttpClient().schedule(_timeout);
return true;
}
}
public void handle() throws IOException
{
if (_exchange != null)
_exchange.associate(this);
try
{
int no_progress = 0;
long flushed = 0;
boolean failed = false;
while (_endp.isBufferingInput() || _endp.isOpen())
{
synchronized (this)
{
while (_exchange == null)
{
if (_endp.isBlocking())
{
try
{
this.wait();
}
catch (InterruptedException e)
{
throw new InterruptedIOException();
}
}
else
{
// Hopefully just space?
_parser.fill();
_parser.skipCRLF();
if (_parser.isMoreInBuffer())
{
Log.warn("Unexpected data received but no request sent");
close();
}
return;
}
}
if (!_exchange.isAssociated())
_exchange.associate(this);
}
if (_exchange.getStatus() == HttpExchange.STATUS_WAITING_FOR_COMMIT)
{
no_progress = 0;
commitRequest();
}
try
{
long io = 0;
_endp.flush();
if (_generator.isComplete())
{
if (!_requestComplete)
{
_requestComplete = true;
_exchange.getEventListener().onRequestComplete();
}
}
else
{
// Write as much of the request as possible
synchronized (this)
{
if (_exchange == null)
continue;
flushed = _generator.flushBuffer();
io += flushed;
}
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();
io += _generator.flushBuffer();
}
}
else
_generator.complete();
}
}
if (_generator.isComplete() && !_requestComplete)
{
_requestComplete = true;
_exchange.getEventListener().onRequestComplete();
}
// If we are not ended then parse available
if (!_parser.isComplete() && _generator.isCommitted())
{
long filled = _parser.parseAvailable();
io += filled;
}
if (io > 0)
no_progress = 0;
else if (no_progress++ >= 2 && !_endp.isBlocking())
{
// SSL may need an extra flush as it may have made "no progress" while actually doing a handshake.
if (_endp instanceof SslSelectChannelEndPoint && !_generator.isComplete() && !_generator.isEmpty())
{
if (_generator.flushBuffer()>0)
continue;
}
return;
}
}
catch (Throwable e)
{
Log.debug("Failure on " + _exchange, e);
if (e instanceof ThreadDeath)
throw (ThreadDeath)e;
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.setStatus(HttpExchange.STATUS_EXCEPTED);
_exchange.getEventListener().onException(e);
}
}
}
failed = true;
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())
{
_destination.getHttpClient().cancel(_timeout);
complete = true;
}
}
}
if (complete || failed)
{
synchronized (this)
{
if (!close)
close = shouldClose();
reset(true);
no_progress = 0;
if (_exchange != null)
{
_exchange.disassociate();
_exchange = null;
if (_pipeline == null)
{
if (!isReserved())
_destination.returnConnection(this, close);
}
else
{
if (close)
{
if (!isReserved())
_destination.returnConnection(this,close);
HttpExchange exchange = _pipeline;
_pipeline = null;
_destination.send(exchange);
}
else
{
HttpExchange exchange = _pipeline;
_pipeline = null;
send(exchange);
}
}
}
}
}
}
}
}
finally
{
if (_exchange != null && _exchange.isAssociated())
_exchange.disassociate();
}
}
public boolean isIdle()
{
synchronized (this)
{
return _exchange == null;
}
}
/**
* @see org.eclipse.jetty.io.Connection#isSuspended()
*/
public boolean isSuspended()
{
return false;
}
public EndPoint getEndPoint()
{
return _endp;
}
private void commitRequest() throws IOException
{
synchronized (this)
{
if (_exchange.getStatus() != HttpExchange.STATUS_WAITING_FOR_COMMIT)
throw new IllegalStateException();
_exchange.setStatus(HttpExchange.STATUS_SENDING_REQUEST);
_generator.setVersion(_exchange.getVersion());
String uri = _exchange.getURI();
if (_destination.isProxied() && uri.startsWith("/"))
{
// TODO suppress port 80 or 443
uri = (_destination.isSecure()?HttpSchemes.HTTPS:HttpSchemes.HTTP) + "://" + _destination.getAddress().getHost() + ":"
+ _destination.getAddress().getPort() + uri;
Authorization auth = _destination.getProxyAuthentication();
if (auth != null)
auth.setCredentials(_exchange);
}
_generator.setRequest(_exchange.getMethod(), uri);
HttpFields requestHeaders = _exchange.getRequestFields();
if (_exchange.getVersion() >= HttpVersions.HTTP_1_1_ORDINAL)
{
if (!requestHeaders.containsKey(HttpHeaders.HOST_BUFFER))
requestHeaders.add(HttpHeaders.HOST_BUFFER,_destination.getHostHeader());
}
Buffer requestContent = _exchange.getRequestContent();
if (requestContent != null)
{
requestHeaders.putLongField(HttpHeaders.CONTENT_LENGTH, requestContent.length());
_generator.completeHeader(requestHeaders,false);
_generator.addContent(requestContent,true);
}
else
{
InputStream requestContentStream = _exchange.getRequestContentSource();
if (requestContentStream != null)
{
_generator.completeHeader(requestHeaders, false);
int available = requestContentStream.available();
if (available > 0)
{
// TODO deal with any known content length
// TODO reuse this buffer!
byte[] buf = new byte[available];
int length = requestContentStream.read(buf);
_generator.addContent(new ByteArrayBuffer(buf, 0, length), false);
}
}
else
{
requestHeaders.remove(HttpHeaders.CONTENT_LENGTH);
_generator.completeHeader(requestHeaders, true);
}
}
_exchange.setStatus(HttpExchange.STATUS_WAITING_FOR_RESPONSE);
}
}
protected void reset(boolean returnBuffers) throws IOException
{
_requestComplete = false;
_connectionHeader = null;
_parser.reset(returnBuffers);
_generator.reset(returnBuffers);
_http11 = true;
}
private boolean shouldClose()
{
if (_connectionHeader!=null)
{
if (HttpHeaderValues.CLOSE_BUFFER.equals(_connectionHeader))
return true;
if (HttpHeaderValues.KEEP_ALIVE_BUFFER.equals(_connectionHeader))
return false;
}
return !_http11;
}
private class Handler extends HttpParser.EventHandler
{
@Override
public void startRequest(Buffer method, Buffer url, Buffer version) throws IOException
{
// System.out.println( method.toString() + "///" + url.toString() +
// "///" + version.toString() );
// TODO validate this is acceptable, the