| /** |
| * |
| */ |
| package org.apache.mina.http2.impl; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.mina.http2.api.BytePartialDecoder; |
| import org.apache.mina.http2.api.Http2FrameHeadePartialDecoder.Http2FrameHeader; |
| import org.apache.mina.http2.api.Http2PushPromiseFrame.Builder; |
| import org.apache.mina.http2.api.IntPartialDecoder; |
| import org.apache.mina.http2.api.PartialDecoder; |
| |
| import static org.apache.mina.http2.api.Http2Constants.FLAGS_PADDING; |
| import static org.apache.mina.http2.api.Http2Constants.HTTP2_31BITS_MASK; |
| |
| /** |
| * @author jeffmaury |
| * |
| */ |
| public class Http2PushPromiseFrameDecoder extends Http2FrameDecoder { |
| |
| private enum State { |
| PAD_LENGTH, |
| PROMISED_STREAM, |
| HEADER, |
| PADDING |
| } |
| |
| private State state; |
| |
| private PartialDecoder<?> decoder; |
| |
| private int padLength; |
| |
| private Builder builder = new Builder(); |
| |
| public Http2PushPromiseFrameDecoder(Http2FrameHeader header) { |
| super(header); |
| if (isFlagSet(FLAGS_PADDING)) { |
| state = State.PAD_LENGTH; |
| } else { |
| state = State.PROMISED_STREAM; |
| decoder = new IntPartialDecoder(4); |
| } |
| initBuilder(builder); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.mina.http2.api.PartialDecoder#consume(java.nio.ByteBuffer) |
| */ |
| @Override |
| public boolean consume(ByteBuffer buffer) { |
| while ((getValue() == null) && buffer.remaining() > 0) { |
| switch (state) { |
| case PAD_LENGTH: |
| padLength = buffer.get(); |
| state = State.PROMISED_STREAM; |
| decoder = new IntPartialDecoder(4); |
| break; |
| case PROMISED_STREAM: |
| if (decoder.consume(buffer)) { |
| builder.promisedStreamID(((IntPartialDecoder)decoder).getValue() & HTTP2_31BITS_MASK); |
| state = State.HEADER; |
| int headerLength = getHeader().getLength() - 4; |
| if (isFlagSet(FLAGS_PADDING)) { |
| headerLength -= (padLength + 1); |
| } |
| decoder = new BytePartialDecoder(headerLength); |
| } |
| break; |
| case HEADER: |
| if (decoder.consume(buffer)) { |
| builder.headerBlockFragment(((BytePartialDecoder)decoder).getValue()); |
| if (isFlagSet(FLAGS_PADDING)) { |
| state = State.PADDING; |
| decoder = new BytePartialDecoder(padLength); |
| } else { |
| setValue(builder.build()); |
| } |
| } |
| break; |
| case PADDING: |
| if (decoder.consume(buffer)) { |
| builder.padding(((BytePartialDecoder)decoder).getValue()); |
| setValue(builder.build()); |
| } |
| break; |
| } |
| } |
| return getValue() != null; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.mina.http2.api.PartialDecoder#reset() |
| */ |
| @Override |
| public void reset() { |
| } |
| |
| } |