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/*
* Copyright 2017 Jan-Piet Mens (jpmens@gmail.com)
* 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.channel.Channel;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpHeaders;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.jboss.netty.handler.codec.http.HttpVersion;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.model.Position;
import org.traccar.helper.UnitsConverter;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.io.StringReader;
import javax.json.Json;
import javax.json.JsonObject;
public class OwnTracksProtocolDecoder extends BaseProtocolDecoder {
public OwnTracksProtocolDecoder(OwnTracksProtocol protocol) {
super(protocol);
}
private void sendResponse(Channel channel, HttpResponseStatus status) {
if (channel != null) {
HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1, status);
response.headers().add(HttpHeaders.Names.CONTENT_LENGTH, 0);
channel.write(response);
}
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
HttpRequest request = (HttpRequest) msg;
JsonObject root = Json.createReader(
new StringReader(request.getContent().toString(StandardCharsets.US_ASCII))).readObject();
if (!root.containsKey("_type") || !root.getString("_type").equals("location")) {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
Position position = new Position();
position.setProtocol(getProtocolName());
position.setValid(true);
position.setLatitude(root.getJsonNumber("lat").doubleValue());
position.setLongitude(root.getJsonNumber("lon").doubleValue());
if (root.containsKey("vel")) {
position.setSpeed(UnitsConverter.knotsFromCps(root.getInt("vel")));
}
if (root.containsKey("alt")) {
position.setAltitude(root.getInt("alt"));
}
if (root.containsKey("cog")) {
position.setCourse(root.getInt("cog"));
}
if (root.containsKey("acc")) {
position.setAccuracy(root.getInt("acc"));
}
if (root.containsKey("t")) {
position.set("t", root.getString("t"));
}
if (root.containsKey("batt")) {
position.set(Position.KEY_BATTERY, root.getInt("batt"));
}
position.setTime(new Date(root.getJsonNumber("tst").longValue() * 1000));
String uniqueId;
if (root.containsKey("topic")) {
uniqueId = root.getString("topic");
if (root.containsKey("tid")) {
position.set("tid", root.getString("tid"));
}
} else {
uniqueId = root.getString("tid");
}
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, uniqueId);
if (deviceSession == null) {
sendResponse(channel, HttpResponseStatus.BAD_REQUEST);
return null;
}
position.setDeviceId(deviceSession.getDeviceId());
sendResponse(channel, HttpResponseStatus.OK);
return position;
}
}
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