Motivation: Persuit for the consistency in method naming Modifications: - Remove the 'get' prefix from all HTTP/SPDY message classes - Fix some inspector warnings Result: Consistency
164 lines
6.6 KiB
Java
164 lines
6.6 KiB
Java
/*
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* Copyright 2014 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.handler.codec.spdy;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufAllocator;
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import java.nio.ByteOrder;
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import java.util.Set;
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import static io.netty.handler.codec.spdy.SpdyCodecUtil.*;
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/**
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* Encodes a SPDY Frame into a {@link ByteBuf}.
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*/
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public class SpdyFrameEncoder {
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private final int version;
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/**
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* Creates a new instance with the specified {@code spdyVersion}.
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*/
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public SpdyFrameEncoder(SpdyVersion spdyVersion) {
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if (spdyVersion == null) {
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throw new NullPointerException("spdyVersion");
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}
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version = spdyVersion.getVersion();
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}
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private void writeControlFrameHeader(ByteBuf buffer, int type, byte flags, int length) {
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buffer.writeShort(version | 0x8000);
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buffer.writeShort(type);
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buffer.writeByte(flags);
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buffer.writeMedium(length);
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}
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public ByteBuf encodeDataFrame(ByteBufAllocator allocator, int streamId, boolean last, ByteBuf data) {
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byte flags = last ? SPDY_DATA_FLAG_FIN : 0;
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int length = data.readableBytes();
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ByteBuf frame = allocator.ioBuffer(SPDY_HEADER_SIZE + length).order(ByteOrder.BIG_ENDIAN);
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frame.writeInt(streamId & 0x7FFFFFFF);
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frame.writeByte(flags);
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frame.writeMedium(length);
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frame.writeBytes(data, data.readerIndex(), length);
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return frame;
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}
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public ByteBuf encodeSynStreamFrame(ByteBufAllocator allocator, int streamId, int associatedToStreamId,
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byte priority, boolean last, boolean unidirectional, ByteBuf headerBlock) {
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int headerBlockLength = headerBlock.readableBytes();
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byte flags = last ? SPDY_FLAG_FIN : 0;
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if (unidirectional) {
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flags |= SPDY_FLAG_UNIDIRECTIONAL;
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}
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int length = 10 + headerBlockLength;
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ByteBuf frame = allocator.ioBuffer(SPDY_HEADER_SIZE + length).order(ByteOrder.BIG_ENDIAN);
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writeControlFrameHeader(frame, SPDY_SYN_STREAM_FRAME, flags, length);
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frame.writeInt(streamId);
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frame.writeInt(associatedToStreamId);
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frame.writeShort((priority & 0xFF) << 13);
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frame.writeBytes(headerBlock, headerBlock.readerIndex(), headerBlockLength);
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return frame;
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}
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public ByteBuf encodeSynReplyFrame(ByteBufAllocator allocator, int streamId, boolean last, ByteBuf headerBlock) {
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int headerBlockLength = headerBlock.readableBytes();
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byte flags = last ? SPDY_FLAG_FIN : 0;
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int length = 4 + headerBlockLength;
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ByteBuf frame = allocator.ioBuffer(SPDY_HEADER_SIZE + length).order(ByteOrder.BIG_ENDIAN);
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writeControlFrameHeader(frame, SPDY_SYN_REPLY_FRAME, flags, length);
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frame.writeInt(streamId);
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frame.writeBytes(headerBlock, headerBlock.readerIndex(), headerBlockLength);
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return frame;
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}
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public ByteBuf encodeRstStreamFrame(ByteBufAllocator allocator, int streamId, int statusCode) {
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byte flags = 0;
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int length = 8;
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ByteBuf frame = allocator.ioBuffer(SPDY_HEADER_SIZE + length).order(ByteOrder.BIG_ENDIAN);
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writeControlFrameHeader(frame, SPDY_RST_STREAM_FRAME, flags, length);
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frame.writeInt(streamId);
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frame.writeInt(statusCode);
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return frame;
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}
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public ByteBuf encodeSettingsFrame(ByteBufAllocator allocator, SpdySettingsFrame spdySettingsFrame) {
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Set<Integer> ids = spdySettingsFrame.ids();
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int numSettings = ids.size();
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byte flags = spdySettingsFrame.clearPreviouslyPersistedSettings() ?
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SPDY_SETTINGS_CLEAR : 0;
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int length = 4 + 8 * numSettings;
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ByteBuf frame = allocator.ioBuffer(SPDY_HEADER_SIZE + length).order(ByteOrder.BIG_ENDIAN);
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writeControlFrameHeader(frame, SPDY_SETTINGS_FRAME, flags, length);
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frame.writeInt(numSettings);
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for (Integer id : ids) {
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flags = 0;
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if (spdySettingsFrame.isPersistValue(id)) {
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flags |= SPDY_SETTINGS_PERSIST_VALUE;
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}
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if (spdySettingsFrame.isPersisted(id)) {
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flags |= SPDY_SETTINGS_PERSISTED;
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}
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frame.writeByte(flags);
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frame.writeMedium(id);
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frame.writeInt(spdySettingsFrame.getValue(id));
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}
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return frame;
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}
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public ByteBuf encodePingFrame(ByteBufAllocator allocator, int id) {
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byte flags = 0;
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int length = 4;
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ByteBuf frame = allocator.ioBuffer(SPDY_HEADER_SIZE + length).order(ByteOrder.BIG_ENDIAN);
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writeControlFrameHeader(frame, SPDY_PING_FRAME, flags, length);
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frame.writeInt(id);
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return frame;
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}
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public ByteBuf encodeGoAwayFrame(ByteBufAllocator allocator, int lastGoodStreamId, int statusCode) {
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byte flags = 0;
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int length = 8;
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ByteBuf frame = allocator.ioBuffer(SPDY_HEADER_SIZE + length).order(ByteOrder.BIG_ENDIAN);
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writeControlFrameHeader(frame, SPDY_GOAWAY_FRAME, flags, length);
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frame.writeInt(lastGoodStreamId);
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frame.writeInt(statusCode);
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return frame;
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}
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public ByteBuf encodeHeadersFrame(ByteBufAllocator allocator, int streamId, boolean last, ByteBuf headerBlock) {
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int headerBlockLength = headerBlock.readableBytes();
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byte flags = last ? SPDY_FLAG_FIN : 0;
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int length = 4 + headerBlockLength;
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ByteBuf frame = allocator.ioBuffer(SPDY_HEADER_SIZE + length).order(ByteOrder.BIG_ENDIAN);
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writeControlFrameHeader(frame, SPDY_HEADERS_FRAME, flags, length);
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frame.writeInt(streamId);
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frame.writeBytes(headerBlock, headerBlock.readerIndex(), headerBlockLength);
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return frame;
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}
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public ByteBuf encodeWindowUpdateFrame(ByteBufAllocator allocator, int streamId, int deltaWindowSize) {
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byte flags = 0;
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int length = 8;
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ByteBuf frame = allocator.ioBuffer(SPDY_HEADER_SIZE + length).order(ByteOrder.BIG_ENDIAN);
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writeControlFrameHeader(frame, SPDY_WINDOW_UPDATE_FRAME, flags, length);
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frame.writeInt(streamId);
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frame.writeInt(deltaWindowSize);
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return frame;
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}
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}
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