681d460938
Motivation:
We have quite a bit of code duplication between HTTP/1, HTTP/2, SPDY,
and STOMP codec, because they all have a notion of 'headers', which is a
multimap of string names and values.
Modifications:
- Add TextHeaders and its default implementation
- Add AsciiString to replace HttpHeaderEntity
- Borrowed some portion from Apache Harmony's java.lang.String.
- Reimplement HttpHeaders, SpdyHeaders, and StompHeaders using
TextHeaders
- Add AsciiHeadersEncoder to reuse the encoding a TextHeaders
- Used a dedicated encoder for HTTP headers for better performance
though
- Remove shortcut methods in SpdyHeaders
- Replace SpdyHeaders.getStatus() with HttpResponseStatus.parseLine()
Result:
- Removed quite a bit of code duplication in the header implementations.
- Slightly better performance thanks to improved header validation and
hash code calculation
73 lines
2.9 KiB
Java
73 lines
2.9 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.stomp;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.handler.codec.AsciiHeadersEncoder;
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import io.netty.handler.codec.AsciiHeadersEncoder.NewlineType;
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import io.netty.handler.codec.AsciiHeadersEncoder.SeparatorType;
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import io.netty.handler.codec.MessageToMessageEncoder;
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import io.netty.util.CharsetUtil;
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import java.util.List;
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/**
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* Encodes a {@link StompFrame} or a {@link StompSubframe} into a {@link ByteBuf}.
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*/
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public class StompSubframeEncoder extends MessageToMessageEncoder<StompSubframe> {
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@Override
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protected void encode(ChannelHandlerContext ctx, StompSubframe msg, List<Object> out) throws Exception {
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if (msg instanceof StompFrame) {
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StompFrame frame = (StompFrame) msg;
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ByteBuf frameBuf = encodeFrame(frame, ctx);
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out.add(frameBuf);
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ByteBuf contentBuf = encodeContent(frame, ctx);
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out.add(contentBuf);
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} else if (msg instanceof StompHeadersSubframe) {
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StompHeadersSubframe frame = (StompHeadersSubframe) msg;
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ByteBuf buf = encodeFrame(frame, ctx);
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out.add(buf);
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} else if (msg instanceof StompContentSubframe) {
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StompContentSubframe stompContentSubframe = (StompContentSubframe) msg;
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ByteBuf buf = encodeContent(stompContentSubframe, ctx);
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out.add(buf);
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}
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}
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private static ByteBuf encodeContent(StompContentSubframe content, ChannelHandlerContext ctx) {
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if (content instanceof LastStompContentSubframe) {
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ByteBuf buf = ctx.alloc().buffer(content.content().readableBytes() + 1);
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buf.writeBytes(content.content());
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buf.writeByte(StompConstants.NUL);
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return buf;
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} else {
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return content.content().retain();
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}
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}
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private static ByteBuf encodeFrame(StompHeadersSubframe frame, ChannelHandlerContext ctx) {
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ByteBuf buf = ctx.alloc().buffer();
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buf.writeBytes(frame.command().toString().getBytes(CharsetUtil.US_ASCII));
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buf.writeByte(StompConstants.LF);
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frame.headers().forEachEntry(new AsciiHeadersEncoder(buf, SeparatorType.COLON, NewlineType.LF));
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buf.writeByte(StompConstants.LF);
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return buf;
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}
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}
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