io.undertow.protocols.http2.Http2SettingsStreamSinkChannel 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 java.nio.ByteBuffer;
import java.util.List;
import io.undertow.connector.PooledByteBuffer;
import io.undertow.server.protocol.framed.SendFrameHeader;
/**
* //TODO: ack
*
* @author Stuart Douglas
*/
public class Http2SettingsStreamSinkChannel extends Http2StreamSinkChannel {
private final List settings;
Http2SettingsStreamSinkChannel(Http2Channel channel, List settings) {
super(channel, 0);
this.settings = settings;
}
/**
* //an ack frame
*
* @param channel
*/
Http2SettingsStreamSinkChannel(Http2Channel channel) {
super(channel, 0);
this.settings = null;
}
@Override
protected SendFrameHeader createFrameHeaderImpl() {
PooledByteBuffer pooled = getChannel().getBufferPool().allocate();
ByteBuffer currentBuffer = pooled.getBuffer();
if (settings != null) {
int size = settings.size() * 6;
currentBuffer.put((byte) ((size >> 16) & 0xFF));
currentBuffer.put((byte) ((size >> 8) & 0xFF));
currentBuffer.put((byte) (size & 0xFF));
currentBuffer.put((byte) Http2Channel.FRAME_TYPE_SETTINGS); //type
currentBuffer.put((byte) 0); //flags
Http2ProtocolUtils.putInt(currentBuffer, getStreamId());
for (Http2Setting setting : settings) {
currentBuffer.put((byte) ((setting.getId() >> 8) & 0xFF));
currentBuffer.put((byte) (setting.getId() & 0xFF));
currentBuffer.put((byte) ((setting.getValue() >> 24) & 0xFF));
currentBuffer.put((byte) ((setting.getValue() >> 16) & 0xFF));
currentBuffer.put((byte) ((setting.getValue() >> 8) & 0xFF));
currentBuffer.put((byte) (setting.getValue() & 0xFF));
}
} else {
currentBuffer.put((byte) 0);
currentBuffer.put((byte) 0);
currentBuffer.put((byte) 0);
currentBuffer.put((byte) Http2Channel.FRAME_TYPE_SETTINGS); //type
currentBuffer.put((byte) Http2Channel.SETTINGS_FLAG_ACK); //flags
Http2ProtocolUtils.putInt(currentBuffer, getStreamId());
}
currentBuffer.flip();
return new SendFrameHeader(pooled);
}
}