com.generallycloud.baseio.codec.http2.future.Http2PrefaceFuture Maven / Gradle / Ivy
/*
* Copyright 2015-2017 GenerallyCloud.com
*
* Licensed 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 com.generallycloud.baseio.codec.http2.future;
import java.io.IOException;
import java.nio.ByteBuffer;
import com.generallycloud.baseio.buffer.ByteBuf;
import com.generallycloud.baseio.buffer.UnpooledByteBufAllocator;
import com.generallycloud.baseio.codec.http2.Http2SocketSession;
import com.generallycloud.baseio.component.SocketChannelContext;
import com.generallycloud.baseio.component.SocketSession;
import com.generallycloud.baseio.protocol.AbstractChannelFuture;
import com.generallycloud.baseio.protocol.DefaultChannelFuture;
public class Http2PrefaceFuture extends AbstractChannelFuture {
private boolean isComplete;
private static byte [] PREFACE_BINARY = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n".getBytes();
private static ByteBuf PREFACE_BUF;
static{
PREFACE_BUF = UnpooledByteBufAllocator.getHeapInstance().wrap(ByteBuffer.wrap(PREFACE_BINARY));
}
public Http2PrefaceFuture(SocketChannelContext context,ByteBuf buf) {
super(context);
this.buf = buf;
}
@Override
public boolean isSilent() {
return true;
}
private void doComplete(Http2SocketSession session, ByteBuf buf) throws IOException {
session.setPrefaceRead(false);
if (!isPreface(buf)) {
throw new IOException("not http2 preface");
}
session.doFlush(new DefaultChannelFuture(context, PREFACE_BUF.duplicate()));
}
private boolean isPreface(ByteBuf buf){
if(PREFACE_BINARY.length > buf.remaining()){
return false;
}
for (int i = 0; i < PREFACE_BINARY.length; i++) {
if(PREFACE_BINARY[i] != buf.getByte()){
return false;
}
}
return true;
}
@Override
public boolean read(SocketSession session, ByteBuf buffer) throws IOException {
ByteBuf buf = this.buf;
if (!isComplete) {
buf.read(buffer);
if (buf.hasRemaining()) {
return false;
}
this.isComplete = true;
doComplete((Http2SocketSession) session, buf.flip());
}
return true;
}
}