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
2.4 KiB
Java
73 lines
2.4 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.http;
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import io.netty.buffer.ByteBuf;
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import io.netty.handler.codec.AsciiString;
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import io.netty.handler.codec.TextHeaderProcessor;
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final class HttpHeadersEncoder implements TextHeaderProcessor {
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private final ByteBuf buf;
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HttpHeadersEncoder(ByteBuf buf) {
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this.buf = buf;
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}
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@Override
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public boolean process(CharSequence name, CharSequence value) throws Exception {
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final ByteBuf buf = this.buf;
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final int nameLen = name.length();
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final int valueLen = value.length();
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final int entryLen = nameLen + valueLen + 4;
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int offset = buf.writerIndex();
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buf.ensureWritable(entryLen);
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writeAscii(buf, offset, name, nameLen);
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offset += nameLen;
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buf.setByte(offset ++, ':');
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buf.setByte(offset ++, ' ');
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writeAscii(buf, offset, value, valueLen);
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offset += valueLen;
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buf.setByte(offset ++, '\r');
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buf.setByte(offset ++, '\n');
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buf.writerIndex(offset);
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return true;
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}
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private static void writeAscii(ByteBuf buf, int offset, CharSequence value, int valueLen) {
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if (value instanceof AsciiString) {
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writeAsciiString(buf, offset, (AsciiString) value, valueLen);
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} else {
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writeCharSequence(buf, offset, value, valueLen);
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}
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}
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private static void writeAsciiString(ByteBuf buf, int offset, AsciiString value, int valueLen) {
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value.copy(0, buf, offset, valueLen);
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}
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private static void writeCharSequence(ByteBuf buf, int offset, CharSequence value, int valueLen) {
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for (int i = 0; i < valueLen; i ++) {
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buf.setByte(offset ++, c2b(value.charAt(i)));
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}
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}
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private static int c2b(char ch) {
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return ch < 256? (byte) ch : '?';
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}
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}
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