Java tutorial
/* * Copyright 2015 - 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.buffer.ByteBuf; import io.netty.buffer.Unpooled; import io.netty.channel.Channel; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.traccar.BaseProtocolDecoder; import org.traccar.Context; import org.traccar.DeviceSession; import org.traccar.NetworkMessage; import org.traccar.Protocol; import org.traccar.helper.BitUtil; import org.traccar.helper.Parser; import org.traccar.helper.PatternBuilder; import org.traccar.helper.UnitsConverter; import org.traccar.model.CellTower; import org.traccar.model.Network; import org.traccar.model.Position; import org.traccar.model.WifiAccessPoint; import java.net.SocketAddress; import java.nio.charset.StandardCharsets; import java.util.Date; import java.util.regex.Pattern; public class WatchProtocolDecoder extends BaseProtocolDecoder { private static final Logger LOGGER = LoggerFactory.getLogger(WatchProtocolDecoder.class); public WatchProtocolDecoder(Protocol protocol) { super(protocol); } private static final Pattern PATTERN_POSITION = new PatternBuilder().number("(dd)(dd)(dd),") // date (ddmmyy) .number("(dd)(dd)(dd),") // time (hhmmss) .expression("([AV]),") // validity .number(" *(-?d+.d+),") // latitude .expression("([NS]),").number(" *(-?d+.d+),") // longitude .expression("([EW])?,").number("(d+.?d*),") // speed .number("(d+.?d*),") // course .number("(d+.?d*),") // altitude .number("(d+),") // satellites .number("(d+),") // rssi .number("(d+),") // battery .number("(d+),") // steps .number("d+,") // tumbles .number("(x+),") // status .expression("(.*)") // cell and wifi .compile(); private void sendResponse(Channel channel, String id, String index, String content) { if (channel != null) { String response; if (index != null) { response = String.format("[%s*%s*%s*%04x*%s]", manufacturer, id, index, content.length(), content); } else { response = String.format("[%s*%s*%04x*%s]", manufacturer, id, content.length(), content); } ByteBuf buf = Unpooled.copiedBuffer(response, StandardCharsets.US_ASCII); channel.writeAndFlush(new NetworkMessage(buf, channel.remoteAddress())); } } private String decodeAlarm(int status) { if (BitUtil.check(status, 0)) { return Position.ALARM_LOW_BATTERY; } else if (BitUtil.check(status, 1)) { return Position.ALARM_GEOFENCE_EXIT; } else if (BitUtil.check(status, 2)) { return Position.ALARM_GEOFENCE_ENTER; } else if (BitUtil.check(status, 3)) { return Position.ALARM_OVERSPEED; } else if (BitUtil.check(status, 16)) { return Position.ALARM_SOS; } else if (BitUtil.check(status, 17)) { return Position.ALARM_LOW_BATTERY; } else if (BitUtil.check(status, 18)) { return Position.ALARM_GEOFENCE_EXIT; } else if (BitUtil.check(status, 19)) { return Position.ALARM_GEOFENCE_ENTER; } else if (BitUtil.check(status, 20)) { return Position.ALARM_REMOVING; } else if (BitUtil.check(status, 21)) { return Position.ALARM_FALL_DOWN; } return null; } private Position decodePosition(DeviceSession deviceSession, String data) { Parser parser = new Parser(PATTERN_POSITION, data); if (!parser.matches()) { return null; } Position position = new Position(getProtocolName()); position.setDeviceId(deviceSession.getDeviceId()); position.setTime(parser.nextDateTime(Parser.DateTimeFormat.DMY_HMS)); position.setValid(parser.next().equals("A")); position.setLatitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM)); position.setLongitude(parser.nextCoordinate(Parser.CoordinateFormat.DEG_HEM)); position.setSpeed(UnitsConverter.knotsFromKph(parser.nextDouble(0))); position.setCourse(parser.nextDouble(0)); position.setAltitude(parser.nextDouble(0)); position.set(Position.KEY_SATELLITES, parser.nextInt(0)); position.set(Position.KEY_RSSI, parser.nextInt(0)); position.set(Position.KEY_BATTERY_LEVEL, parser.nextInt(0)); position.set(Position.KEY_STEPS, parser.nextInt(0)); int status = parser.nextHexInt(0); position.set(Position.KEY_ALARM, decodeAlarm(status)); if (BitUtil.check(status, 4)) { position.set(Position.KEY_MOTION, true); } String[] values = parser.next().split(","); int index = 0; Network network = new Network(); int cellCount = Integer.parseInt(values[index++]); index += 1; // timing advance int mcc = Integer.parseInt(values[index++]); int mnc = Integer.parseInt(values[index++]); for (int i = 0; i < cellCount; i++) { network.addCellTower(CellTower.from(mcc, mnc, Integer.parseInt(values[index++]), Integer.parseInt(values[index++]), Integer.parseInt(values[index++]))); } if (index < values.length && !values[index].isEmpty()) { int wifiCount = Integer.parseInt(values[index++]); for (int i = 0; i < wifiCount; i++) { index += 1; // wifi name network.addWifiAccessPoint( WifiAccessPoint.from(values[index++], Integer.parseInt(values[index++]))); } } if (network.getCellTowers() != null || network.getWifiAccessPoints() != null) { position.setNetwork(network); } return position; } private boolean hasIndex; private String manufacturer; public boolean getHasIndex() { return hasIndex; } public String getManufacturer() { return manufacturer; } @Override protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { ByteBuf buf = (ByteBuf) msg; buf.skipBytes(1); // '[' header manufacturer = buf.readSlice(2).toString(StandardCharsets.US_ASCII); buf.skipBytes(1); // '*' delimiter int idIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*'); String id = buf.readSlice(idIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII); DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id); if (deviceSession == null) { return null; } buf.skipBytes(1); // '*' delimiter String index = null; int contentIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*'); if (contentIndex + 5 < buf.writerIndex() && buf.getByte(contentIndex + 5) == '*' && buf.toString(contentIndex + 1, 4, StandardCharsets.US_ASCII).matches("\\p{XDigit}+")) { int indexLength = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*') - buf.readerIndex(); hasIndex = true; index = buf.readSlice(indexLength).toString(StandardCharsets.US_ASCII); buf.skipBytes(1); // '*' delimiter } buf.skipBytes(4); // length buf.skipBytes(1); // '*' delimiter buf.writerIndex(buf.writerIndex() - 1); // ']' ignore ending contentIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ','); if (contentIndex < 0) { contentIndex = buf.writerIndex(); } String type = buf.readSlice(contentIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII); if (contentIndex < buf.writerIndex()) { buf.readerIndex(contentIndex + 1); } if (type.equals("INIT")) { sendResponse(channel, id, index, "INIT,1"); } else if (type.equals("LK")) { sendResponse(channel, id, index, "LK"); if (buf.isReadable()) { String[] values = buf.toString(StandardCharsets.US_ASCII).split(","); if (values.length >= 3) { Position position = new Position(getProtocolName()); position.setDeviceId(deviceSession.getDeviceId()); getLastLocation(position, null); position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(values[2])); return position; } } } else if (type.equals("UD") || type.equals("UD2") || type.equals("UD3") || type.equals("AL") || type.equals("WT")) { Position position = decodePosition(deviceSession, buf.toString(StandardCharsets.US_ASCII)); if (type.equals("AL")) { if (position != null) { position.set(Position.KEY_ALARM, Position.ALARM_SOS); } sendResponse(channel, id, index, "AL"); } return position; } else if (type.equals("TKQ")) { sendResponse(channel, id, index, "TKQ"); } else if (type.equals("PULSE") || type.equals("heart") || type.equals("bphrt")) { if (buf.isReadable()) { Position position = new Position(getProtocolName()); position.setDeviceId(deviceSession.getDeviceId()); getLastLocation(position, new Date()); String[] values = buf.toString(StandardCharsets.US_ASCII).split(","); int valueIndex = 0; if (type.equals("bphrt")) { position.set("pressureHigh", values[valueIndex++]); position.set("pressureLow", values[valueIndex++]); } position.set(Position.KEY_HEART_RATE, Integer.parseInt(values[valueIndex])); return position; } } else if (type.equals("img")) { Position position = new Position(getProtocolName()); position.setDeviceId(deviceSession.getDeviceId()); getLastLocation(position, null); int timeIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ','); buf.readerIndex(timeIndex + 12 + 2); position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(id, buf, "jpg")); return position; } else if (type.equals("TK")) { if (buf.readableBytes() == 1) { byte result = buf.readByte(); if (result != '1') { LOGGER.warn(type + "," + result); } return null; } Position position = new Position(getProtocolName()); position.setDeviceId(deviceSession.getDeviceId()); getLastLocation(position, null); position.set(Position.KEY_AUDIO, Context.getMediaManager().writeFile(id, buf, "amr")); return position; } return null; } }