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//
// ========================================================================
// Copyright (c) 1995-2012 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.spdy.server.http;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpGenerator;
import org.eclipse.jetty.http.HttpStatus;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.io.EndPoint;
import org.eclipse.jetty.io.EofException;
import org.eclipse.jetty.server.Connector;
import org.eclipse.jetty.server.HttpConfiguration;
import org.eclipse.jetty.server.HttpTransport;
import org.eclipse.jetty.spdy.StreamException;
import org.eclipse.jetty.spdy.api.ByteBufferDataInfo;
import org.eclipse.jetty.spdy.api.ReplyInfo;
import org.eclipse.jetty.spdy.api.SPDY;
import org.eclipse.jetty.spdy.api.Stream;
import org.eclipse.jetty.spdy.api.StreamStatus;
import org.eclipse.jetty.spdy.api.SynInfo;
import org.eclipse.jetty.util.BlockingCallback;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.Fields;
import org.eclipse.jetty.util.Promise;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
public class HttpTransportOverSPDY implements HttpTransport
{
private static final Logger LOG = Log.getLogger(HttpTransportOverSPDY.class);
private final Connector connector;
private final HttpConfiguration configuration;
private final EndPoint endPoint;
private final PushStrategy pushStrategy;
private final Stream stream;
private final Fields requestHeaders;
private final BlockingCallback streamBlocker = new BlockingCallback();
private final AtomicBoolean committed = new AtomicBoolean();
public HttpTransportOverSPDY(Connector connector, HttpConfiguration configuration, EndPoint endPoint, PushStrategy pushStrategy, Stream stream, Fields requestHeaders)
{
this.connector = connector;
this.configuration = configuration;
this.endPoint = endPoint;
this.pushStrategy = pushStrategy==null?new PushStrategy.None():pushStrategy;
this.stream = stream;
this.requestHeaders = requestHeaders;
}
@Override
public void send(HttpGenerator.ResponseInfo info, ByteBuffer content, boolean lastContent, Callback callback)
{
if (LOG.isDebugEnabled())
LOG.debug("send {} {} {} {} last={}",this,stream,info,BufferUtil.toDetailString(content),lastContent);
if (stream.isClosed() || stream.isReset())
{
EofException exception = new EofException("stream closed");
callback.failed(exception);
LOG.warn("Committed response twice.", exception);
return;
}
// new Throwable().printStackTrace();
// info==null content==null lastContent==false should not happen
// info==null content==null lastContent==true signals no more content - complete
// info==null content!=null lastContent==false send data on committed response
// info==null content!=null lastContent==true send last data on committed response - complete
// info!=null content==null lastContent==false reply, commit
// info!=null content==null lastContent==true reply, commit and complete
// info!=null content!=null lastContent==false reply, commit with content
// info!=null content!=null lastContent==true reply, commit with content and complete
boolean hasContent = BufferUtil.hasContent(content);
if (info!=null)
{
if(!committed.compareAndSet(false, true)){
callback.failed(new StreamException(stream.getId(), StreamStatus.PROTOCOL_ERROR,
"Stream already committed!"));
return;
}
short version = stream.getSession().getVersion();
Fields headers = new Fields();
HttpVersion httpVersion = HttpVersion.HTTP_1_1;
headers.put(HTTPSPDYHeader.VERSION.name(version), httpVersion.asString());
int status = info.getStatus();
StringBuilder httpStatus = new StringBuilder().append(status);
String reason = info.getReason();
if (reason == null)
reason = HttpStatus.getMessage(status);
if (reason != null)
httpStatus.append(" ").append(reason);
headers.put(HTTPSPDYHeader.STATUS.name(version), httpStatus.toString());
LOG.debug("HTTP < {} {}", httpVersion, httpStatus);
// TODO merge the two Field classes into one
HttpFields fields = info.getHttpFields();
if (fields != null)
{
for (int i = 0; i < fields.size(); ++i)
{
HttpFields.Field field = fields.getField(i);
String name = field.getName();
String value = field.getValue();
headers.put(name, value);
LOG.debug("HTTP < {}: {}", name, value);
}
}
boolean close = !hasContent && lastContent;
ReplyInfo reply = new ReplyInfo(headers,close);
reply(stream, reply);
}
// Do we have some content to send as well
if (hasContent)
{
// Is the stream still open?
if (stream.isClosed()|| stream.isReset())
// tell the callback about the EOF
callback.failed(new EofException("stream closed"));
else
// send the data and let it call the callback
stream.data(new ByteBufferDataInfo(content, lastContent),endPoint.getIdleTimeout(),TimeUnit.MILLISECONDS,callback);
}
// else do we need to close
else if (lastContent)
{
// Are we closed ?
if (stream.isClosed()|| stream.isReset())
// already closed by reply, so just tell callback we are complete
callback.succeeded();
else
// send empty data to close and let the send call the callback
stream.data(new ByteBufferDataInfo(BufferUtil.EMPTY_BUFFER, lastContent),endPoint.getIdleTimeout(),TimeUnit.MILLISECONDS,callback);
}
else
// No data and no close so tell callback we are completed
callback.succeeded();
}
@Override
public void send(HttpGenerator.ResponseInfo info, ByteBuffer content, boolean lastContent) throws EofException
{
send(info,content,lastContent,streamBlocker);
try
{
streamBlocker.block();
}
catch (InterruptedException | TimeoutException | IOException e)
{
LOG.debug(e);
}
}
@Override
public void completed()
{
LOG.debug("completed");
}
private void reply(Stream stream, ReplyInfo replyInfo)
{
if (!stream.isUnidirectional())
stream.reply(replyInfo);
Fields responseHeaders = replyInfo.getHeaders();
short version = stream.getSession().getVersion();
if (responseHeaders.get(HTTPSPDYHeader.STATUS.name(version)).value().startsWith("200") && !stream.isClosed())
{
// We have a 200 OK with some content to send, check the push strategy
Fields.Field scheme = requestHeaders.get(HTTPSPDYHeader.SCHEME.name(version));
Fields.Field host = requestHeaders.get(HTTPSPDYHeader.HOST.name(version));
Fields.Field uri = requestHeaders.get(HTTPSPDYHeader.URI.name(version));
Set<String> pushResources = pushStrategy.apply(stream, requestHeaders, responseHeaders);
for (String pushResource : pushResources)
{
Fields pushHeaders = createPushHeaders(scheme, host, pushResource);
final Fields pushRequestHeaders = createRequestHeaders(scheme, host, uri, pushResource);
// TODO: handle the timeout better
stream.syn(new SynInfo(pushHeaders, false), 0, TimeUnit.MILLISECONDS, new Promise.Adapter<Stream>()
{
@Override
public void succeeded(Stream pushStream)
{
HttpChannelOverSPDY pushChannel = newHttpChannelOverSPDY(pushStream, pushRequestHeaders);
pushChannel.requestStart(pushRequestHeaders, true);
}
});
}
}
}
private Fields createRequestHeaders(Fields.Field scheme, Fields.Field host, Fields.Field uri, String pushResourcePath)
{
final Fields requestHeaders = new Fields();
short version = stream.getSession().getVersion();
requestHeaders.put(HTTPSPDYHeader.METHOD.name(version), "GET");
requestHeaders.put(HTTPSPDYHeader.VERSION.name(version), "HTTP/1.1");
requestHeaders.put(scheme);
requestHeaders.put(host);
requestHeaders.put(HTTPSPDYHeader.URI.name(version), pushResourcePath);
String referrer = scheme.value() + "://" + host.value() + uri.value();
requestHeaders.put("referer", referrer);
// Remember support for gzip encoding
requestHeaders.put(requestHeaders.get("accept-encoding"));
requestHeaders.put("x-spdy-push", "true");
return requestHeaders;
}
private Fields createPushHeaders(Fields.Field scheme, Fields.Field host, String pushResourcePath)
{
final Fields pushHeaders = new Fields();
short version = stream.getSession().getVersion();
if (version == SPDY.V2)
pushHeaders.put(HTTPSPDYHeader.URI.name(version), scheme.value() + "://" + host.value() + pushResourcePath);
else
{
pushHeaders.put(HTTPSPDYHeader.URI.name(version), pushResourcePath);
pushHeaders.put(scheme);
pushHeaders.put(host);
}
pushHeaders.put(HTTPSPDYHeader.STATUS.name(version), "200");
pushHeaders.put(HTTPSPDYHeader.VERSION.name(version), "HTTP/1.1");
return pushHeaders;
}
private HttpChannelOverSPDY newHttpChannelOverSPDY(Stream pushStream, Fields pushRequestHeaders)
{
HttpTransport transport = new HttpTransportOverSPDY(connector, configuration, endPoint, pushStrategy, pushStream, pushRequestHeaders);
HttpInputOverSPDY input = new HttpInputOverSPDY();
return new HttpChannelOverSPDY(connector, configuration, endPoint, transport, input, pushStream);
}
}
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