io.github.jzdayz.protocol.Response Maven / Gradle / Ivy
package io.github.jzdayz.protocol;
import com.alibaba.fastjson.JSON;
import io.github.jzdayz.util.ByteUtils;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.nio.charset.StandardCharsets;
@Data
@Builder
@AllArgsConstructor
@NoArgsConstructor
public class Response {
private Header header;
private byte[] body;
/**
* len + headerLen + header + body
* @param byteBuf 字节
* @return response
*/
public static Response decode(ByteBuf byteBuf){
int len = byteBuf.readInt();
int headerLen = byteBuf.readInt();
ByteBuf headerBytes = byteBuf.readSlice(headerLen);
Header header = JSON.parseObject(new String(ByteBufUtil.getBytes(headerBytes), StandardCharsets.UTF_8), Header.class);
return Response.builder().header(header).body(ByteBufUtil.getBytes(byteBuf.readSlice(len-4-headerLen))).build();
}
public static byte[] encode(Response response){
Header header = response.getHeader();
byte[] body = response.getBody();
byte[] headerBytes = JSON.toJSONBytes(header);
byte[] res = new byte[4+4+headerBytes.length+body.length];
System.arraycopy(ByteUtils.intToByteArray(res.length - 4),0,res,0,4);
System.arraycopy(ByteUtils.intToByteArray(headerBytes.length),0,res,4,4);
System.arraycopy(headerBytes,0,res,8,headerBytes.length);
System.arraycopy(body,0,res,res.length - body.length,body.length);
return res;
}
}