| // |
| // ======================================================================== |
| // Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.http2.generator; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Map; |
| |
| import org.eclipse.jetty.http2.Flags; |
| import org.eclipse.jetty.http2.frames.Frame; |
| import org.eclipse.jetty.http2.frames.FrameType; |
| import org.eclipse.jetty.http2.frames.SettingsFrame; |
| import org.eclipse.jetty.io.ByteBufferPool; |
| import org.eclipse.jetty.util.BufferUtil; |
| |
| public class SettingsGenerator extends FrameGenerator |
| { |
| public SettingsGenerator(HeaderGenerator headerGenerator) |
| { |
| super(headerGenerator); |
| } |
| |
| @Override |
| public int generate(ByteBufferPool.Lease lease, Frame frame) |
| { |
| SettingsFrame settingsFrame = (SettingsFrame)frame; |
| return generateSettings(lease, settingsFrame.getSettings(), settingsFrame.isReply()); |
| } |
| |
| public int generateSettings(ByteBufferPool.Lease lease, Map<Integer, Integer> settings, boolean reply) |
| { |
| // Two bytes for the identifier, four bytes for the value. |
| int entryLength = 2 + 4; |
| int length = entryLength * settings.size(); |
| if (length > getMaxFrameSize()) |
| throw new IllegalArgumentException("Invalid settings, too big"); |
| |
| ByteBuffer header = generateHeader(lease, FrameType.SETTINGS, length, reply ? Flags.ACK : Flags.NONE, 0); |
| |
| for (Map.Entry<Integer, Integer> entry : settings.entrySet()) |
| { |
| header.putShort(entry.getKey().shortValue()); |
| header.putInt(entry.getValue()); |
| } |
| |
| BufferUtil.flipToFlush(header, 0); |
| lease.append(header, true); |
| |
| return Frame.HEADER_LENGTH + length; |
| } |
| } |