AbstractHttpSyncCommand.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * 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 org.kaaproject.kaa.server.transports.http.transport.commands;

import static io.netty.handler.codec.http.HttpHeaders.Names.CONNECTION;
import static io.netty.handler.codec.http.HttpHeaders.Names.CONTENT_LENGTH;
import static io.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TYPE;
import static io.netty.handler.codec.http.HttpResponseStatus.OK;
import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;
import static org.apache.commons.codec.binary.Base64.encodeBase64String;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpResponse;
import io.netty.handler.codec.http.multipart.Attribute;
import io.netty.handler.codec.http.multipart.DefaultHttpDataFactory;
import io.netty.handler.codec.http.multipart.HttpDataFactory;
import io.netty.handler.codec.http.multipart.HttpPostRequestDecoder;
import io.netty.handler.codec.http.multipart.InterfaceHttpData;
import io.netty.handler.codec.http.multipart.InterfaceHttpData.HttpDataType;

import org.apache.commons.codec.binary.Base64;
import org.kaaproject.kaa.common.Constants;
import org.kaaproject.kaa.common.endpoint.CommonEpConstans;
import org.kaaproject.kaa.common.endpoint.security.MessageEncoderDecoder;
import org.kaaproject.kaa.server.common.server.BadRequestException;
import org.kaaproject.kaa.server.transport.channel.ChannelType;
import org.kaaproject.kaa.server.transports.http.transport.netty.AbstractCommand;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import java.util.List;


public abstract class AbstractHttpSyncCommand extends AbstractCommand {


  private byte[] requestSignature;


  private byte[] requestKey;


  private byte[] requestData;


  private byte[] responseBody;


  private byte[] responseSignature;

  private int nextProtocol = Constants.KAA_PLATFORM_PROTOCOL_AVRO_ID;

  /**
   * Instantiates a new abstract operations command.
   */
  public AbstractHttpSyncCommand() {
    super();
  }

  public static String getCommandName() {
    return COMMAND_NAME;
  }

  /**
   * Gets the type of channel that issued this command.
   *
   * @return the response converter class
   */
  public abstract ChannelType getChannelType();

  /*
   * (non-Javadoc)
   *
   * @see
   * org.kaaproject.kaa.server.common.http.server.CommandProcessor#parse()
   */
  @Override
  public void parse() throws Exception {
    LOG.trace("CommandName: " + COMMAND_NAME + ": Parse..");
    HttpDataFactory factory = new DefaultHttpDataFactory(DefaultHttpDataFactory.MINSIZE);
    HttpPostRequestDecoder decoder = new HttpPostRequestDecoder(factory, getRequest());
    if (decoder.isMultipart()) {
      LOG.trace("Chunked: " + HttpHeaders.isTransferEncodingChunked(getRequest()));
      LOG.trace(": Multipart..");
      List<InterfaceHttpData> datas = decoder.getBodyHttpDatas();
      if (!datas.isEmpty()) {
        for (InterfaceHttpData data : datas) {
          LOG.trace("Multipart1 name " + data.getName() + " type " + data.getHttpDataType().name());
          if (data.getHttpDataType() == HttpDataType.Attribute) {
            Attribute attribute = (Attribute) data;
            if (CommonEpConstans.REQUEST_SIGNATURE_ATTR_NAME.equals(data.getName())) {
              requestSignature = attribute.get();
              if (LOG.isTraceEnabled()) {
                LOG.trace("Multipart name " + data.getName() + " type "
                    + data.getHttpDataType().name() + " Signature set. size: "
                    + requestSignature.length);
                LOG.trace(MessageEncoderDecoder.bytesToHex(requestSignature));
              }

            } else if (CommonEpConstans.REQUEST_KEY_ATTR_NAME.equals(data.getName())) {
              requestKey = attribute.get();
              if (LOG.isTraceEnabled()) {
                LOG.trace("Multipart name " + data.getName() + " type "
                    + data.getHttpDataType().name() + " requestKey set. size: "
                    + requestKey.length);
                LOG.trace(MessageEncoderDecoder.bytesToHex(requestKey));
              }
            } else if (CommonEpConstans.REQUEST_DATA_ATTR_NAME.equals(data.getName())) {
              requestData = attribute.get();
              if (LOG.isTraceEnabled()) {
                LOG.trace("Multipart name " + data.getName() + " type "
                    + data.getHttpDataType().name() + " requestData set. size: "
                    + requestData.length);
                LOG.trace(MessageEncoderDecoder.bytesToHex(requestData));
              }
            } else if (CommonEpConstans.NEXT_PROTOCOL_ATTR_NAME.equals(data.getName())) {
              nextProtocol = ByteBuffer.wrap(attribute.get()).getInt();
              LOG.trace("[{}] next protocol is {}", getSessionUuid(), nextProtocol);
            }
          }
        }
      } else {
        LOG.error("Multipart.. size 0");
        throw new BadRequestException("HTTP Request inccorect, multiprat size is 0");
      }
    }
  }

  /*
   * (non-Javadoc)
   *
   * @see
   * org.kaaproject.kaa.server.common.http.server.CommandProcessor#Process ()
   */
  @Override
  public void process() throws BadRequestException, GeneralSecurityException, IOException {
  }

  public byte[] getRequestSignature() {
    return requestSignature;
  }

  public byte[] getRequestkey() {
    return requestKey;
  }

  public byte[] getRequestData() {
    return requestData;
  }

  public byte[] getResponseBody() {
    return responseBody;
  }

  public void setResponseBody(byte[] responseBody) {
    this.responseBody = responseBody;
  }

  public byte[] getResponseSignature() {
    return responseSignature;
  }

  public void setResponseSignature(byte[] responseSignature) {
    this.responseSignature = responseSignature;
  }

  /*
   * (non-Javadoc)
   *
   * @see org.kaaproject.kaa.server.common.http.server.CommandProcessor#
   * getHttpResponse()
   */
  @Override
  public HttpResponse getResponse() {
    LOG.trace("CommandName: " + COMMAND_NAME + ": getHttpResponse..");

    ByteBuf data = Unpooled.copiedBuffer(responseBody);
    LOG.warn("Response data: {}", Arrays.toString(data.array()));
    FullHttpResponse httpResponse = new DefaultFullHttpResponse(HTTP_1_1, OK, data);

    httpResponse.headers().set(CONTENT_TYPE, CommonEpConstans.RESPONSE_CONTENT_TYPE);
    httpResponse.headers().set(CONTENT_LENGTH, data.readableBytes());
    LOG.warn("Response size: {}", data.readableBytes());
    httpResponse
        .headers()
        .set(CommonEpConstans.RESPONSE_TYPE, CommonEpConstans.RESPONSE_TYPE_OPERATION);
    if (responseSignature != null) {
      httpResponse
          .headers()
          .set(CommonEpConstans.SIGNATURE_HEADER_NAME, encodeBase64String(responseSignature));
    }
    if (isNeedConnectionClose()) {
      httpResponse.headers().set(CONNECTION, HttpHeaders.Values.CLOSE);
    } else {
      if (HttpHeaders.isKeepAlive(getRequest())) {
        httpResponse.headers().set(CONNECTION, HttpHeaders.Values.KEEP_ALIVE);
      } else {
        httpResponse.headers().set(CONNECTION, HttpHeaders.Values.CLOSE);
      }
    }
    return httpResponse;
  }

  @Override
  public int getNextProtocol() {
    return nextProtocol;
  }
}