io.undertow.protocols.http2.Http2DataFrameParser 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 org.xnio.Bits;
/**
* Parses the data frame. If the passing flag has not been set then there is nothing to parse.
*
* @author Stuart Douglas
*/
class Http2DataFrameParser extends Http2PushBackParser {
private int padding = 0;
Http2DataFrameParser(int frameLength) {
super(frameLength);
}
@Override
protected void handleData(ByteBuffer resource, Http2FrameHeaderParser headerParser) throws ConnectionErrorException {
if (Bits.anyAreClear(headerParser.flags, Http2Channel.DATA_FLAG_PADDED)) {
finish();
return;
}
if(headerParser.length == 0) {
//empty frame with padding set
//which is wrong
throw new ConnectionErrorException(Http2Channel.ERROR_PROTOCOL_ERROR);
}
if (resource.remaining() > 0) {
padding = resource.get() & 0xFF;
headerParser.length--; //decrement the length by one as we have consumed a byte
if(padding > headerParser.length) {
throw new ConnectionErrorException(Http2Channel.ERROR_PROTOCOL_ERROR);
}
finish();
}
}
int getPadding() {
return padding;
}
}