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/*
* Copyright 2022 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 io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpResponseStatus;
import io.netty.handler.codec.http.QueryStringDecoder;
import org.traccar.BaseHttpProtocolDecoder;
import org.traccar.Protocol;
import org.traccar.model.CellTower;
import org.traccar.model.Network;
import org.traccar.model.Position;
import org.traccar.session.DeviceSession;
import javax.json.Json;
import javax.json.JsonArray;
import javax.json.JsonObject;
import java.io.StringReader;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.List;
import java.util.Map;
public class RfTrackProtocolDecoder extends BaseHttpProtocolDecoder {
public RfTrackProtocolDecoder(Protocol protocol) {
super(protocol);
}
@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
FullHttpRequest request = (FullHttpRequest) msg;
QueryStringDecoder decoder = new QueryStringDecoder(
request.content().toString(StandardCharsets.US_ASCII), false);
Map<String, List<String>> params = decoder.parameters();
Position position = new Position(getProtocolName());
Network network = new Network();
for (Map.Entry<String, List<String>> entry : params.entrySet()) {
for (String value : entry.getValue()) {
switch (entry.getKey()) {
case "i":
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, value);
if (deviceSession == null) {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
break;
case "v":
position.set(Position.KEY_VERSION_FW, value);
break;
case "t":
position.setDeviceTime(new Date(Long.parseLong(value)));
break;
case "bat":
position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(value) & 0xff);
break;
case "gps":
JsonObject location = Json.createReader(new StringReader(value)).readObject();
position.setValid(true);
position.setAccuracy(location.getJsonNumber("a").doubleValue());
position.setLongitude(location.getJsonNumber("x").doubleValue());
position.setLatitude(location.getJsonNumber("y").doubleValue());
position.setAltitude(location.getJsonNumber("z").doubleValue());
position.setFixTime(new Date(location.getJsonNumber("t").longValue()));
break;
case "gsm":
JsonObject cellInfo = Json.createReader(new StringReader(value)).readObject();
int mcc = cellInfo.getInt("c");
int mnc = cellInfo.getInt("n");
JsonArray cells = cellInfo.getJsonArray("b");
for (int i = 0; i < cells.size(); i++) {
JsonObject cell = cells.getJsonObject(i);
network.addCellTower(CellTower.from(
mcc, mnc, cell.getInt("l"), cell.getInt("c"), cell.getInt("b")));
}
break;
default:
break;
}
}
}
if (position.getFixTime() == null) {
getLastLocation(position, position.getDeviceTime());
}
if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) {
position.setNetwork(network);
}
sendResponse(channel, HttpResponseStatus.OK, Unpooled.copiedBuffer("{}", StandardCharsets.UTF_8));
return position;
}
}
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