com.baidu.brpc.protocol.http.HttpHeadersEncoder Maven / Gradle / Ivy
/*
* Copyright (c) 2018 Baidu, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.baidu.brpc.protocol.http;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.util.AsciiString;
import io.netty.util.CharsetUtil;
import static com.baidu.brpc.protocol.http.BrpcHttpObjectEncoder.CRLF_SHORT;
import static io.netty.handler.codec.http.HttpConstants.COLON;
import static io.netty.handler.codec.http.HttpConstants.SP;
public class HttpHeadersEncoder {
private static final int COLON_AND_SPACE_SHORT = (COLON << 8) | SP;
private HttpHeadersEncoder() {
}
static void encoderHeader(CharSequence name, CharSequence value, ByteBuf buf) {
final int nameLen = name.length();
final int valueLen = value.length();
final int entryLen = nameLen + valueLen + 4;
buf.ensureWritable(entryLen);
int offset = buf.writerIndex();
writeAscii(buf, offset, name);
offset += nameLen;
ByteBufUtil.setShortBE(buf, offset, COLON_AND_SPACE_SHORT);
offset += 2;
writeAscii(buf, offset, value);
offset += valueLen;
ByteBufUtil.setShortBE(buf, offset, CRLF_SHORT);
offset += 2;
buf.writerIndex(offset);
}
private static void writeAscii(ByteBuf buf, int offset, CharSequence value) {
if (value instanceof AsciiString) {
ByteBufUtil.copy((AsciiString) value, 0, buf, offset, value.length());
} else {
buf.setCharSequence(offset, value, CharsetUtil.US_ASCII);
}
}
}