/*
 * Copyright (c) 2014, 2017 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.grizzly.http2;

import org.glassfish.grizzly.Buffer;
import org.glassfish.grizzly.http2.frames.HeaderBlockHead;
import org.glassfish.grizzly.http2.hpack.Decoder;
import org.glassfish.grizzly.http2.hpack.DecodingCallback;
import org.glassfish.grizzly.memory.Buffers;
import org.glassfish.grizzly.memory.MemoryManager;

Author:oleksiys
/** * * @author oleksiys */
public class HeadersDecoder { private final Decoder hpackDecoder; private final MemoryManager memoryManager; private final int maxHeaderSize; private int currentHeaderSize; private HeaderBlockHead firstHeaderFrame; private Buffer inBuffer; // @TODO Implement maxHeaderSize limitation handling public HeadersDecoder(final MemoryManager memoryManager, final int maxHeaderSize, final int maxHeaderTableSize) { this.memoryManager = memoryManager; this.maxHeaderSize = maxHeaderSize; this.hpackDecoder = new Decoder(maxHeaderTableSize); } public boolean append(final Buffer buffer) { currentHeaderSize += buffer.remaining(); if (currentHeaderSize <= maxHeaderSize) { inBuffer = Buffers.appendBuffers(memoryManager, inBuffer, buffer, true); return true; } return false; } public void decode(final DecodingCallback callback) { if (inBuffer != null) { hpackDecoder.decode(inBuffer, !isProcessingHeaders(), callback); inBuffer.tryDispose(); inBuffer = null; } } public HeaderBlockHead finishHeader() { final HeaderBlockHead firstHeaderFrameLocal = firstHeaderFrame; firstHeaderFrame = null; currentHeaderSize = 0; return firstHeaderFrameLocal; } public void setFirstHeaderFrame( final HeaderBlockHead firstHeaderFrame) { this.firstHeaderFrame = firstHeaderFrame; } public boolean isProcessingHeaders() { return firstHeaderFrame != null; } }