io.undertow.protocols.http2.Http2HeadersParser Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* JBoss, Home of Professional Open Source.
* 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 org.xnio.Bits;
/**
* Parser for HTTP2 Headers frames
*
* @author Stuart Douglas
*/
class Http2HeadersParser extends Http2HeaderBlockParser {
private static final int DEPENDENCY_MASK = ~(1 << 7);
private int paddingLength = 0;
private int dependentStreamId = 0;
private int weight = 16; //default weight as per spec
private boolean headersEndStream = false;
private boolean exclusive;
Http2HeadersParser(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);
boolean hasPriority = Bits.anyAreSet(headerParser.flags, Http2Channel.HEADERS_FLAG_PRIORITY);
headersEndStream = Bits.allAreSet(headerParser.flags, Http2Channel.HEADERS_FLAG_END_STREAM);
int reqLength = (hasPadding ? 1 : 0) + (hasPriority ? 5 : 0);
if (reqLength == 0) {
return true;
}
if (resource.remaining() < reqLength) {
return false;
}
if (hasPadding) {
paddingLength = (resource.get() & 0xFF);
}
if (hasPriority) {
if (resource.remaining() < 4) {
return false;
}
byte b = resource.get();
exclusive = (b & (1 << 7)) != 0;
dependentStreamId = (b & DEPENDENCY_MASK & 0xFF) << 24;
dependentStreamId += (resource.get() & 0xFF) << 16;
dependentStreamId += (resource.get() & 0xFF) << 8;
dependentStreamId += (resource.get() & 0xFF);
weight = resource.get() & 0xFF;
}
return true;
}
protected int getPaddingLength() {
return paddingLength;
}
int getDependentStreamId() {
return dependentStreamId;
}
int getWeight() {
return weight;
}
boolean isHeadersEndStream() {
return headersEndStream;
}
public boolean isExclusive() {
return exclusive;
}
}