| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.apisix.plugin.runner.handler; |
| |
| import io.github.api7.A6.Err.Code; |
| import io.netty.buffer.ByteBuf; |
| import io.netty.channel.ChannelHandlerContext; |
| import io.netty.channel.SimpleChannelInboundHandler; |
| import org.apache.apisix.plugin.runner.A6ConfigRequest; |
| import org.apache.apisix.plugin.runner.A6ErrRequest; |
| import org.apache.apisix.plugin.runner.A6Request; |
| import org.apache.apisix.plugin.runner.ExtraInfoResponse; |
| import org.apache.apisix.plugin.runner.HttpRequest; |
| import org.apache.apisix.plugin.runner.PostRequest; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.nio.BufferUnderflowException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.apisix.plugin.runner.constants.Constants; |
| |
| public class PayloadDecoder extends SimpleChannelInboundHandler<ByteBuf> { |
| private final Logger logger = LoggerFactory.getLogger(PayloadDecoder.class); |
| |
| @Override |
| protected void channelRead0(ChannelHandlerContext ctx, ByteBuf byteBuf) { |
| ByteBuffer buffer = byteBuf.nioBuffer(); |
| A6Request request = decode(buffer); |
| ctx.fireChannelRead(request); |
| } |
| |
| public A6Request decode(ByteBuffer buffer) { |
| byte type; |
| try { |
| type = buffer.get(); |
| } catch (BufferUnderflowException e) { |
| logger.warn("receive empty data"); |
| return new A6ErrRequest(Code.BAD_REQUEST); |
| } |
| |
| ByteBuffer body; |
| switch (type) { |
| case Constants.RPC_PREPARE_CONF: |
| A6ConfigRequest a6ConfigRequest; |
| try { |
| body = getBody(buffer); |
| a6ConfigRequest = A6ConfigRequest.from(body); |
| } catch (BufferUnderflowException | IndexOutOfBoundsException e) { |
| logger.warn("receive error data length"); |
| return new A6ErrRequest(Code.BAD_REQUEST); |
| } |
| return a6ConfigRequest; |
| case Constants.RPC_HTTP_REQ_CALL: |
| HttpRequest httpRequest; |
| try { |
| body = getBody(buffer); |
| httpRequest = HttpRequest.from(body); |
| } catch (BufferUnderflowException | IndexOutOfBoundsException e) { |
| return new A6ErrRequest(Code.BAD_REQUEST); |
| } |
| return httpRequest; |
| |
| case Constants.RPC_EXTRA_INFO: |
| ExtraInfoResponse extraInfoResponse; |
| try { |
| body = getBody(buffer); |
| extraInfoResponse = ExtraInfoResponse.from(body); |
| } catch (BufferUnderflowException | IndexOutOfBoundsException e) { |
| return new A6ErrRequest(Code.BAD_REQUEST); |
| } |
| return extraInfoResponse; |
| |
| case Constants.RPC_HTTP_RESP_CALL: |
| PostRequest postRequest; |
| try { |
| body = getBody(buffer); |
| postRequest = PostRequest.from(body); |
| } catch (BufferUnderflowException | IndexOutOfBoundsException e) { |
| return new A6ErrRequest(Code.BAD_REQUEST); |
| } |
| return postRequest; |
| |
| default: |
| break; |
| } |
| |
| logger.warn("receive unsupported type: {}", type); |
| return new A6ErrRequest(Code.BAD_REQUEST); |
| } |
| |
| private int getDataLength(ByteBuffer payload) { |
| byte[] bytes = new byte[3]; |
| for (int i = 0; i < 3; i++) { |
| bytes[i] = payload.get(); |
| } |
| return bytes2Int(bytes, 0, 3); |
| } |
| |
| private ByteBuffer getBody(ByteBuffer payload) throws BufferUnderflowException, IndexOutOfBoundsException { |
| int length = getDataLength(payload); |
| ByteBuffer buffer = payload.slice(); |
| byte[] dst = new byte[length]; |
| buffer.get(dst, 0, length); |
| buffer.flip(); |
| return buffer; |
| } |
| |
| private int bytes2Int(byte[] b, int start, int len) { |
| int sum = 0; |
| int end = start + len; |
| for (int i = start; i < end; i++) { |
| int n = b[i] & 0xff; |
| n <<= (--len) * 8; |
| sum += n; |
| } |
| return sum; |
| } |
| } |