io.undertow.protocols.http2.Http2PushPromiseParser 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 org.xnio.Bits;
import java.nio.ByteBuffer;
/**
* Parser for HTTP2 Headers frames
*
* @author Stuart Douglas
*/
class Http2PushPromiseParser extends Http2HeaderBlockParser {
private int paddingLength = 0;
private int promisedStreamId;
private static final int STREAM_MASK = ~(1 << 7);
Http2PushPromiseParser(int frameLength, HpackDecoder hpackDecoder, boolean client, int maxHeaders, int streamId, int maxHeaderListSize) {
super(frameLength, hpackDecoder, client, maxHeaders, streamId, maxHeaderListSize);
}
@Override
protected boolean handleBeforeHeader(ByteBuffer resource, Http2FrameHeaderParser headerParser) {
boolean hasPadding = Bits.anyAreSet(headerParser.flags, Http2Channel.HEADERS_FLAG_PADDED);
int reqLength = (hasPadding ? 1 : 0) + 4;
if (resource.remaining() < reqLength) {
return false;
}
if (hasPadding) {
paddingLength = (resource.get() & 0xFF);
}
promisedStreamId = (resource.get() & STREAM_MASK) << 24;
promisedStreamId += (resource.get() & 0xFF) << 16;
promisedStreamId += (resource.get() & 0xFF) << 8;
promisedStreamId += (resource.get() & 0xFF);
return true;
}
protected int getPaddingLength() {
return paddingLength;
}
public int getPromisedStreamId() {
return promisedStreamId;
}
}