| /** |
| * |
| */ |
| 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.Http2GoAwayFrame.Builder; |
| import org.apache.mina.http2.api.IntPartialDecoder; |
| import org.apache.mina.http2.api.PartialDecoder; |
| |
| import static org.apache.mina.http2.api.Http2Constants.HTTP2_31BITS_MASK; |
| /** |
| * @author jeffmaury |
| * |
| */ |
| public class Http2GoAwayFrameDecoder extends Http2FrameDecoder { |
| |
| private enum State { |
| LAST_STREAM_ID, |
| CODE, |
| EXTRA |
| } |
| |
| private State state; |
| |
| private PartialDecoder<?> decoder; |
| |
| private Builder builder = new Builder(); |
| |
| public Http2GoAwayFrameDecoder(Http2FrameHeader header) { |
| super(header); |
| state = State.LAST_STREAM_ID; |
| 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 LAST_STREAM_ID: |
| if (decoder.consume(buffer)) { |
| builder.lastStreamID(((IntPartialDecoder)decoder).getValue() & HTTP2_31BITS_MASK); |
| state = State.CODE; |
| decoder.reset(); |
| } |
| case CODE: |
| if (decoder.consume(buffer)) { |
| builder.errorCode(((IntPartialDecoder)decoder).getValue()); |
| if (getHeader().getLength() > 8) { |
| state = State.EXTRA; |
| decoder = new BytePartialDecoder(getHeader().getLength() - 8); |
| } else { |
| setValue(builder.build()); |
| } |
| } |
| break; |
| case EXTRA: |
| if (decoder.consume(buffer)) { |
| builder.data(((BytePartialDecoder)decoder).getValue()); |
| setValue(builder.build()); |
| } |
| break; |
| } |
| } |
| return getValue() != null; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.apache.mina.http2.api.PartialDecoder#reset() |
| */ |
| @Override |
| public void reset() { |
| } |
| |
| } |