| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| package org.apache.mina.http2.impl; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.mina.http2.api.Http2DataFrame.Http2DataFrameBuilder; |
| import org.apache.mina.http2.impl.Http2FrameHeadePartialDecoder.Http2FrameHeader; |
| |
| import static org.apache.mina.http2.api.Http2Constants.FLAGS_PADDING; |
| |
| /** |
| * |
| * @author <a href="http://mina.apache.org">Apache MINA Project</a> |
| */ |
| public class Http2DataFrameDecoder extends Http2FrameDecoder { |
| |
| private enum State { |
| PAD_LENGTH, |
| DATA, |
| PADDING |
| } |
| |
| private State state; |
| |
| private PartialDecoder<?> decoder; |
| |
| private int padLength; |
| |
| private Http2DataFrameBuilder builder = new Http2DataFrameBuilder(); |
| |
| public Http2DataFrameDecoder(Http2FrameHeader header) { |
| super(header); |
| initBuilder(builder); |
| if (isFlagSet(FLAGS_PADDING)) { |
| state = State.PAD_LENGTH; |
| } else if (header.getLength() > 0) { |
| state = State.DATA; |
| decoder = new BytePartialDecoder(header.getLength()); |
| } else { |
| setValue(builder.build()); |
| } |
| } |
| |
| /* (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(); |
| if ((getHeader().getLength() - 1 - padLength) > 0) { |
| state = State.DATA; |
| decoder = new BytePartialDecoder(getHeader().getLength() - 1 - padLength); |
| } else if (padLength > 0) { |
| state = State.PADDING; |
| decoder = new BytePartialDecoder(padLength); |
| } else { |
| setValue(builder.build()); |
| } |
| break; |
| case DATA: |
| if (decoder.consume(buffer)) { |
| builder.data(((BytePartialDecoder)decoder).getValue()); |
| if (isFlagSet(FLAGS_PADDING) && (padLength > 0)) { |
| 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() { |
| } |
| |
| } |