io.undertow.protocols.http2.Http2PingStreamSinkChannel Maven / Gradle / Ivy
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* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 io.undertow.protocols.http2;
import static io.undertow.protocols.http2.Http2Channel.PING_FRAME_LENGTH;
import java.nio.ByteBuffer;
import io.undertow.UndertowMessages;
import io.undertow.server.protocol.framed.SendFrameHeader;
import io.undertow.util.ImmediatePooledByteBuffer;
/**
* @author Stuart Douglas
*/
class Http2PingStreamSinkChannel extends Http2NoDataStreamSinkChannel {
public static final int HEADER = (PING_FRAME_LENGTH << 8) | (Http2Channel.FRAME_TYPE_PING);
private final byte[] data;
private final boolean ack;
protected Http2PingStreamSinkChannel(Http2Channel channel, byte[] data, boolean ack) {
super(channel);
if (data.length != PING_FRAME_LENGTH) {
throw new IllegalArgumentException(UndertowMessages.MESSAGES.httpPingDataMustBeLength8());
}
this.data = data;
this.ack = ack;
}
@Override
protected SendFrameHeader createFrameHeader() {
ByteBuffer buf = ByteBuffer.allocate(17);
Http2ProtocolUtils.putInt(buf, HEADER);
buf.put((byte) (ack ? Http2Channel.PING_FLAG_ACK : 0));
Http2ProtocolUtils.putInt(buf, 0); //stream id, must be zero
for (int i = 0; i < PING_FRAME_LENGTH; ++i) {
buf.put(data[i]);
}
buf.flip();
return new SendFrameHeader(new ImmediatePooledByteBuffer(buf));
}
}