/
HttpTransportOverHTTP3.java
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/
HttpTransportOverHTTP3.java
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//
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.http3.server.internal;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.function.Consumer;
import java.util.function.Supplier;
import org.eclipse.jetty.http.BadMessageException;
import org.eclipse.jetty.http.HttpFields;
import org.eclipse.jetty.http.HttpMethod;
import org.eclipse.jetty.http.HttpStatus;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.http.MetaData;
import org.eclipse.jetty.http3.api.Stream;
import org.eclipse.jetty.http3.frames.DataFrame;
import org.eclipse.jetty.http3.frames.HeadersFrame;
import org.eclipse.jetty.http3.internal.HTTP3ErrorCode;
import org.eclipse.jetty.server.HttpTransport;
import org.eclipse.jetty.util.BufferUtil;
import org.eclipse.jetty.util.Callback;
import org.eclipse.jetty.util.thread.AutoLock;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class HttpTransportOverHTTP3 implements HttpTransport
{
private static final Logger LOG = LoggerFactory.getLogger(HttpTransportOverHTTP3.class);
private final AtomicBoolean commit = new AtomicBoolean();
private final TransportCallback transportCallback = new TransportCallback();
private final HTTP3StreamServer stream;
private MetaData.Response metaData;
public HttpTransportOverHTTP3(HTTP3StreamServer stream)
{
this.stream = stream;
}
@Override
public void send(MetaData.Request request, MetaData.Response response, ByteBuffer content, boolean lastContent, Callback callback)
{
if (response != null)
sendHeaders(request, response, content, lastContent, callback);
else
sendContent(request, content, lastContent, callback);
}
private void sendHeaders(MetaData.Request request, MetaData.Response response, ByteBuffer content, boolean lastContent, Callback callback)
{
metaData = response;
HeadersFrame headersFrame;
DataFrame dataFrame = null;
HeadersFrame trailersFrame = null;
boolean isHeadRequest = HttpMethod.HEAD.is(request.getMethod());
boolean hasContent = BufferUtil.hasContent(content) && !isHeadRequest;
int status = response.getStatus();
boolean interimResponse = status >= HttpStatus.CONTINUE_100 && status < HttpStatus.OK_200 && status != HttpStatus.SWITCHING_PROTOCOLS_101;
if (interimResponse)
{
// Must not commit interim responses.
if (hasContent)
{
callback.failed(new IllegalStateException("Interim response cannot have content"));
return;
}
headersFrame = new HeadersFrame(metaData, false);
}
else
{
if (commit.compareAndSet(false, true))
{
if (lastContent)
{
long realContentLength = BufferUtil.length(content);
long contentLength = response.getContentLength();
if (contentLength < 0)
{
metaData = new MetaData.Response(
response.getHttpVersion(),
response.getStatus(),
response.getReason(),
response.getFields(),
realContentLength,
response.getTrailerSupplier()
);
}
else if (hasContent && contentLength != realContentLength)
{
callback.failed(new BadMessageException(HttpStatus.INTERNAL_SERVER_ERROR_500, String.format("Incorrect Content-Length %d!=%d", contentLength, realContentLength)));
return;
}
}
if (hasContent)
{
headersFrame = new HeadersFrame(metaData, false);
if (lastContent)
{
HttpFields trailers = retrieveTrailers();
if (trailers == null)
{
dataFrame = new DataFrame(content, true);
}
else
{
dataFrame = new DataFrame(content, false);
trailersFrame = new HeadersFrame(new MetaData(HttpVersion.HTTP_3, trailers), true);
}
}
else
{
dataFrame = new DataFrame(content, false);
}
}
else
{
if (lastContent)
{
if (isTunnel(request, metaData))
{
headersFrame = new HeadersFrame(metaData, false);
}
else
{
HttpFields trailers = retrieveTrailers();
if (trailers == null)
{
headersFrame = new HeadersFrame(metaData, true);
}
else
{
headersFrame = new HeadersFrame(metaData, false);
trailersFrame = new HeadersFrame(new MetaData(HttpVersion.HTTP_3, trailers), true);
}
}
}
else
{
headersFrame = new HeadersFrame(metaData, false);
}
}
}
else
{
callback.failed(new IllegalStateException("committed"));
return;
}
}
HeadersFrame hf = headersFrame;
DataFrame df = dataFrame;
HeadersFrame tf = trailersFrame;
transportCallback.send(callback, true, c ->
{
if (LOG.isDebugEnabled())
{
LOG.debug("HTTP3 Response #{}/{}:{}{} {}{}{}",
stream.getId(), Integer.toHexString(stream.getSession().hashCode()),
System.lineSeparator(), HttpVersion.HTTP_3, metaData.getStatus(),
System.lineSeparator(), metaData.getFields());
}
CompletableFuture<Stream> cf = stream.respond(hf);
if (df != null)
cf = cf.thenCompose(s -> s.data(df));
if (tf != null)
cf = cf.thenCompose(s -> s.trailer(tf));
c.completeWith(cf);
});
}
private void sendContent(MetaData.Request request, ByteBuffer content, boolean lastContent, Callback callback)
{
boolean isHeadRequest = HttpMethod.HEAD.is(request.getMethod());
boolean hasContent = BufferUtil.hasContent(content) && !isHeadRequest;
if (hasContent || (lastContent && !isTunnel(request, metaData)))
{
if (lastContent)
{
HttpFields trailers = retrieveTrailers();
if (trailers == null)
{
transportCallback.send(callback, false, c ->
sendDataFrame(content, true, true, c));
}
else
{
SendTrailers sendTrailers = new SendTrailers(callback, trailers);
if (hasContent)
{
transportCallback.send(sendTrailers, false, c ->
sendDataFrame(content, true, false, c));
}
else
{
sendTrailers.succeeded();
}
}
}
else
{
transportCallback.send(callback, false, c ->
sendDataFrame(content, false, false, c));
}
}
else
{
callback.succeeded();
}
}
private HttpFields retrieveTrailers()
{
Supplier<HttpFields> supplier = metaData.getTrailerSupplier();
if (supplier == null)
return null;
HttpFields trailers = supplier.get();
if (trailers == null)
return null;
return trailers.size() == 0 ? null : trailers;
}
private boolean isTunnel(MetaData.Request request, MetaData.Response response)
{
return MetaData.isTunnel(request.getMethod(), response.getStatus());
}
@Override
public boolean isPushSupported()
{
return false;
}
@Override
public void push(MetaData.Request request)
{
// TODO
throw new UnsupportedOperationException();
}
@Override
public void onCompleted()
{
Object attachment = stream.getAttachment();
if (attachment instanceof HttpChannelOverHTTP3)
{
// If the stream is not closed, it is still reading the request content.
// Send a reset to the other end so that it stops sending data.
if (!stream.isClosed())
{
if (LOG.isDebugEnabled())
LOG.debug("HTTP3 Response #{}: unconsumed request content, resetting stream", stream.getId());
stream.reset(HTTP3ErrorCode.REQUEST_CANCELLED_ERROR.code(), new IOException("unconsumed content"));
}
// Consume the existing queued data frames to
// avoid stalling the session flow control.
HttpChannelOverHTTP3 channel = (HttpChannelOverHTTP3)attachment;
channel.consumeInput();
}
}
boolean onIdleTimeout(Throwable failure)
{
return transportCallback.idleTimeout(failure);
}
void onFailure(Throwable failure)
{
transportCallback.abort(failure);
}
@Override
public void abort(Throwable failure)
{
if (LOG.isDebugEnabled())
LOG.debug("HTTP3 Response #{}/{} aborted", stream.getId(), Integer.toHexString(stream.getSession().hashCode()));
stream.reset(HTTP3ErrorCode.REQUEST_CANCELLED_ERROR.code(), failure);
}
private void sendDataFrame(ByteBuffer content, boolean lastContent, boolean endStream, Callback callback)
{
if (LOG.isDebugEnabled())
{
LOG.debug("HTTP3 Response #{}/{}: {} content bytes{}",
stream.getId(), Integer.toHexString(stream.getSession().hashCode()),
content.remaining(), lastContent ? " (last chunk)" : "");
}
DataFrame frame = new DataFrame(content, endStream);
callback.completeWith(stream.data(frame));
}
private void sendTrailerFrame(MetaData metaData, Callback callback)
{
if (LOG.isDebugEnabled())
{
LOG.debug("HTTP3 Response #{}/{}: trailer",
stream.getId(), Integer.toHexString(stream.getSession().hashCode()));
}
HeadersFrame frame = new HeadersFrame(metaData, true);
callback.completeWith(stream.trailer(frame));
}
/**
* <p>Send states for {@link TransportCallback}.</p>
*
* @see TransportCallback
*/
private enum State
{
/**
* <p>No send initiated or in progress.</p>
*/
IDLE,
/**
* <p>A send is initiated and possibly in progress.</p>
*/
SENDING,
/**
* <p>The terminal state indicating failure of the send.</p>
*/
FAILED
}
/**
* <p>Callback that controls sends initiated by the transport, by eventually
* notifying a nested callback.</p>
* <p>There are 3 sources of concurrency after a send is initiated:</p>
* <ul>
* <li>the completion of the send operation, either success or failure</li>
* <li>an asynchronous failure coming from the read side such as a stream
* being reset, or the connection being closed</li>
* <li>an asynchronous idle timeout</li>
* </ul>
*
* @see State
*/
private class TransportCallback implements Callback
{
private final AutoLock _lock = new AutoLock();
private State _state = State.IDLE;
private Callback _callback;
private boolean _commit;
private Throwable _failure;
private void reset(Throwable failure)
{
assert _lock.isHeldByCurrentThread();
_state = failure != null ? State.FAILED : State.IDLE;
_callback = null;
_commit = false;
_failure = failure;
}
private void send(Callback callback, boolean commit, Consumer<Callback> sendFrame)
{
Throwable failure = sending(callback, commit);
if (failure == null)
sendFrame.accept(this);
else
callback.failed(failure);
}
private void abort(Throwable failure)
{
failed(failure);
}
private Throwable sending(Callback callback, boolean commit)
{
try (AutoLock l = _lock.lock())
{
switch (_state)
{
case IDLE:
{
_state = State.SENDING;
_callback = callback;
_commit = commit;
return null;
}
case FAILED:
{
return _failure;
}
default:
{
return new IllegalStateException("Invalid transport state: " + _state);
}
}
}
}
@Override
public void succeeded()
{
Callback callback;
boolean commit;
try (AutoLock l = _lock.lock())
{
if (_state != State.SENDING)
{
// This thread lost the race to succeed the current
// send, as other threads likely already failed it.
return;
}
callback = _callback;
commit = _commit;
reset(null);
}
if (LOG.isDebugEnabled())
LOG.debug("HTTP3 Response #{}/{} {} success",
stream.getId(), Integer.toHexString(stream.getSession().hashCode()),
commit ? "commit" : "flush");
callback.succeeded();
}
@Override
public void failed(Throwable failure)
{
Callback callback;
boolean commit;
try (AutoLock l = _lock.lock())
{
if (_state != State.SENDING)
{
reset(failure);
return;
}
callback = _callback;
commit = _commit;
reset(failure);
}
if (LOG.isDebugEnabled())
LOG.debug("HTTP3 Response #{}/{} {} failure",
stream.getId(), Integer.toHexString(stream.getSession().hashCode()),
commit ? "commit" : "flush",
failure);
callback.failed(failure);
}
private boolean idleTimeout(Throwable failure)
{
Callback callback = null;
try (AutoLock l = _lock.lock())
{
// Ignore idle timeouts if not writing,
// as the application may be suspended.
if (_state == State.SENDING)
{
callback = _callback;
reset(failure);
}
}
boolean timeout = callback != null;
if (LOG.isDebugEnabled())
LOG.debug("HTTP3 Response #{}/{} idle timeout {}",
stream.getId(), Integer.toHexString(stream.getSession().hashCode()),
timeout ? "expired" : "ignored",
failure);
if (timeout)
callback.failed(failure);
return timeout;
}
@Override
public InvocationType getInvocationType()
{
Callback callback;
try (AutoLock l = _lock.lock())
{
callback = _callback;
}
return callback != null ? callback.getInvocationType() : Callback.super.getInvocationType();
}
}
private class SendTrailers extends Callback.Nested
{
private final HttpFields trailers;
private SendTrailers(Callback callback, HttpFields trailers)
{
super(callback);
this.trailers = trailers;
}
@Override
public void succeeded()
{
transportCallback.send(getCallback(), false, c ->
sendTrailerFrame(new MetaData(HttpVersion.HTTP_3, trailers), c));
}
}
}