| // |
| // ======================================================================== |
| // Copyright (c) 1995-2017 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.http2.parser; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.eclipse.jetty.http.MetaData; |
| import org.eclipse.jetty.http2.ErrorCode; |
| import org.eclipse.jetty.http2.Flags; |
| import org.eclipse.jetty.http2.frames.HeadersFrame; |
| |
| public class ContinuationBodyParser extends BodyParser |
| { |
| private final HeaderBlockParser headerBlockParser; |
| private final HeaderBlockFragments headerBlockFragments; |
| private State state = State.PREPARE; |
| private int length; |
| |
| public ContinuationBodyParser(HeaderParser headerParser, Parser.Listener listener, HeaderBlockParser headerBlockParser, HeaderBlockFragments headerBlockFragments) |
| { |
| super(headerParser, listener); |
| this.headerBlockParser = headerBlockParser; |
| this.headerBlockFragments = headerBlockFragments; |
| } |
| |
| @Override |
| protected void emptyBody(ByteBuffer buffer) |
| { |
| if (hasFlag(Flags.END_HEADERS)) |
| onHeaders(); |
| } |
| |
| @Override |
| public boolean parse(ByteBuffer buffer) |
| { |
| while (buffer.hasRemaining()) |
| { |
| switch (state) |
| { |
| case PREPARE: |
| { |
| // SPEC: wrong streamId is treated as connection error. |
| if (getStreamId() == 0) |
| return connectionFailure(buffer, ErrorCode.PROTOCOL_ERROR.code, "invalid_continuation_frame"); |
| |
| if (getStreamId() != headerBlockFragments.getStreamId()) |
| return connectionFailure(buffer, ErrorCode.PROTOCOL_ERROR.code, "invalid_continuation_stream"); |
| |
| length = getBodyLength(); |
| state = State.FRAGMENT; |
| break; |
| } |
| case FRAGMENT: |
| { |
| int remaining = buffer.remaining(); |
| if (remaining < length) |
| { |
| headerBlockFragments.storeFragment(buffer, remaining, false); |
| length -= remaining; |
| break; |
| } |
| else |
| { |
| boolean last = hasFlag(Flags.END_HEADERS); |
| headerBlockFragments.storeFragment(buffer, length, last); |
| reset(); |
| if (last) |
| onHeaders(); |
| return true; |
| } |
| } |
| default: |
| { |
| throw new IllegalStateException(); |
| } |
| } |
| } |
| return false; |
| } |
| |
| private void onHeaders() |
| { |
| ByteBuffer headerBlock = headerBlockFragments.complete(); |
| MetaData metaData = headerBlockParser.parse(headerBlock, headerBlock.remaining()); |
| HeadersFrame frame = new HeadersFrame(getStreamId(), metaData, headerBlockFragments.getPriorityFrame(), headerBlockFragments.isEndStream()); |
| notifyHeaders(frame); |
| } |
| |
| private void reset() |
| { |
| state = State.PREPARE; |
| length = 0; |
| } |
| |
| private enum State |
| { |
| PREPARE, FRAGMENT |
| } |
| } |