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/*
* Copyright 2018 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.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.DeviceSession;
import org.traccar.Protocol;
import org.traccar.helper.DateBuilder;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
public class OpenGtsProtocolDecoder extends BaseHttpProtocolDecoder {
private static final Pattern PATTERN = new PatternBuilder()
.text("$GPRMC,")
.number("(dd)(dd)(dd)(?:.d+)?,") // time (hhmmss)
.expression("([AV]),") // validity
.number("(d+)(dd.d+),") // latitude
.expression("([NS]),")
.number("(d+)(dd.d+),") // longitude
.expression("([EW]),")
.number("(d+.d+),") // speed
.number("(d+.d+)?,") // course
.number("(dd)(dd)(dd),") // date (ddmmyy)
.any()
.compile();
public OpenGtsProtocolDecoder(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.uri());
Map<String, List<String>> params = decoder.parameters();
Position position = new Position(getProtocolName());
for (Map.Entry<String, List<String>> entry : params.entrySet()) {
String value = entry.getValue().get(0);
switch (entry.getKey()) {
case "id":
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, value);
if (deviceSession == null) {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
break;
case "gprmc":
Parser parser = new Parser(PATTERN, value);
if (!parser.matches()) {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
DateBuilder dateBuilder = new DateBuilder()
.setTime(parser.nextInt(), parser.nextInt(), parser.nextInt());
position.setValid(parser.next().equals("A"));
position.setLatitude(parser.nextCoordinate());
position.setLongitude(parser.nextCoordinate());
position.setSpeed(parser.nextDouble());
position.setCourse(parser.nextDouble(0));
dateBuilder.setDateReverse(parser.nextInt(), parser.nextInt(), parser.nextInt());
position.setTime(dateBuilder.getDate());
break;
case "alt":
position.setAltitude(Double.parseDouble(value));
break;
case "batt":
position.set(Position.KEY_BATTERY_LEVEL, Double.parseDouble(value));
break;
default:
break;
}
}
if (position.getDeviceId() != 0) {
sendResponse(channel, HttpResponseStatus.OK);
return position;
} else {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
}
}
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