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/*
* Copyright 2017 Anton Tananaev (anton@traccar.org)
*
* 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.traccar.protocol;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.traccar.BaseHttpProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.helper.DataConverter;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import javax.json.Json;
import javax.json.JsonObject;
import java.io.StringReader;
import java.net.SocketAddress;
import java.net.URLDecoder;
import java.nio.ByteOrder;
import java.nio.charset.StandardCharsets;
import java.util.Date;
public class SigfoxProtocolDecoder extends BaseHttpProtocolDecoder {
public SigfoxProtocolDecoder(SigfoxProtocol protocol) {
super(protocol);
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
HttpRequest request = (HttpRequest) msg;
JsonObject json = Json.createReader(new StringReader(URLDecoder.decode(
request.getContent().toString(StandardCharsets.UTF_8).split("=")[0], "UTF-8"))).readObject();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, json.getString("device"));
if (deviceSession == null) {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
position.setTime(new Date(json.getInt("time") * 1000L));
ChannelBuffer buf = ChannelBuffers.wrappedBuffer(
ByteOrder.LITTLE_ENDIAN, DataConverter.parseHex(json.getString("data")));
int type = buf.readUnsignedByte() >> 4;
if (type == 0) {
position.setValid(true);
position.setLatitude(buf.readInt() * 0.0000001);
position.setLongitude(buf.readInt() * 0.0000001);
position.setCourse(buf.readUnsignedByte() * 2);
position.setSpeed(UnitsConverter.knotsFromKph(buf.readUnsignedByte()));
position.set(Position.KEY_BATTERY, buf.readUnsignedByte() * 0.025);
} else {
getLastLocation(position, position.getDeviceTime());
}
position.set(Position.KEY_RSSI, json.getJsonNumber("rssi").doubleValue());
position.set(Position.KEY_INDEX, json.getInt("seqNumber"));
sendResponse(channel, HttpResponseStatus.OK);
return position;
}
}
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