| /* |
| * 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.Http2Frame; |
| import org.apache.mina.http2.impl.Http2FrameHeadePartialDecoder.Http2FrameHeader; |
| |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_DATA; |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_HEADERS; |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_PRIORITY; |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_RST_STREAM; |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_SETTINGS; |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_PUSH_PROMISE; |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_PING; |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_GOAWAY; |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_WINDOW_UPDATE; |
| import static org.apache.mina.http2.api.Http2Constants.FRAME_TYPE_CONTINUATION; |
| |
| /** |
| * |
| * @author <a href="http://mina.apache.org">Apache MINA Project</a> |
| */ |
| public class Http2Connection { |
| |
| private static enum DecoderState { |
| HEADER, |
| FRAME |
| } |
| |
| private final Http2FrameHeadePartialDecoder headerDecoder = new Http2FrameHeadePartialDecoder(); |
| private Http2FrameDecoder frameDecoder; |
| private DecoderState decoderState = DecoderState.HEADER; |
| |
| /** |
| * Decode the incoming message and if all frame data has been received, |
| * then the decoded frame will be returned. Otherwise, null is returned. |
| * |
| * @param input the input buffer to decode |
| * @return the decoder HTTP2 frame or null if more data are required |
| */ |
| public Http2Frame decode(ByteBuffer input) { |
| Http2Frame frame = null; |
| switch (decoderState) { |
| case HEADER: |
| if (headerDecoder.consume(input)) { |
| Http2FrameHeader header = headerDecoder.getValue(); |
| headerDecoder.reset(); |
| decoderState = DecoderState.FRAME; |
| switch (header.getType()) { |
| case FRAME_TYPE_DATA: |
| frameDecoder = new Http2DataFrameDecoder(header); |
| break; |
| case FRAME_TYPE_HEADERS: |
| frameDecoder = new Http2HeadersFrameDecoder(header); |
| break; |
| case FRAME_TYPE_PRIORITY: |
| frameDecoder = new Http2PriorityFrameDecoder(header); |
| break; |
| case FRAME_TYPE_RST_STREAM: |
| frameDecoder = new Http2RstStreamFrameDecoder(header); |
| break; |
| case FRAME_TYPE_SETTINGS: |
| frameDecoder =new Http2SettingsFrameDecoder(header); |
| break; |
| case FRAME_TYPE_PUSH_PROMISE: |
| frameDecoder = new Http2PushPromiseFrameDecoder(header); |
| break; |
| case FRAME_TYPE_PING: |
| frameDecoder = new Http2PingFrameDecoder(header); |
| break; |
| case FRAME_TYPE_GOAWAY: |
| frameDecoder = new Http2GoAwayFrameDecoder(header); |
| break; |
| case FRAME_TYPE_WINDOW_UPDATE: |
| frameDecoder = new Http2WindowUpdateFrameDecoder(header); |
| break; |
| case FRAME_TYPE_CONTINUATION: |
| frameDecoder = new Http2ContinuationFrameDecoder(header); |
| break; |
| default: |
| frameDecoder = new Http2UnknownFrameDecoder(header); |
| break; |
| } |
| if (frameDecoder.consume(input)) { |
| frame = frameDecoder.getValue(); |
| decoderState = DecoderState.HEADER; |
| } |
| } |
| break; |
| case FRAME: |
| if (frameDecoder.consume(input)) { |
| frame = frameDecoder.getValue(); |
| decoderState = DecoderState.HEADER; |
| } |
| break; |
| } |
| return frame; |
| } |
| } |