1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
/*
* 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.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import org.traccar.BaseProtocolDecoder;
import org.traccar.DeviceSession;
import org.traccar.NetworkMessage;
import org.traccar.helper.Parser;
import org.traccar.helper.PatternBuilder;
import org.traccar.helper.UnitsConverter;
import org.traccar.model.Position;
import java.net.SocketAddress;
import java.nio.charset.StandardCharsets;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import java.util.regex.Pattern;
public class WristbandProtocolDecoder extends BaseProtocolDecoder {
public WristbandProtocolDecoder(WristbandProtocol protocol) {
super(protocol);
}
private void sendResponse(
Channel channel, String imei, String version, int type, String data) {
if (channel != null) {
String sentence = String.format("YX%s|%s|0|{F%d#%s}\r\n", imei, version, type, data);
ByteBuf response = Unpooled.buffer();
response.writeBytes(new byte[]{0x00, 0x01, 0x02});
response.writeShort(sentence.length());
response.writeCharSequence(sentence, StandardCharsets.US_ASCII);
response.writeBytes(new byte[]{(byte) 0xFF, (byte) 0xFE, (byte) 0xFC});
channel.writeAndFlush(new NetworkMessage(response, channel.remoteAddress()));
}
}
private static final Pattern PATTERN = new PatternBuilder()
.expression("..") // header
.number("(d+)|") // imei
.number("(vd+.d+)|") // version
.number("d+|") // model
.text("{")
.number("F(d+)") // function
.groupBegin()
.text("#")
.expression("(.*)") // data
.groupEnd("?")
.text("}")
.text("\r\n")
.compile();
private Position decodePosition(DeviceSession deviceSession, String sentence) throws ParseException {
Position position = new Position(getProtocolName());
position.setDeviceId(deviceSession.getDeviceId());
String[] values = sentence.split(",");
position.setValid(true);
position.setLongitude(Double.parseDouble(values[0]));
position.setLatitude(Double.parseDouble(values[1]));
position.setTime(new SimpleDateFormat("yyyyMMddHHmmss").parse(values[2]));
position.setSpeed(UnitsConverter.knotsFromKph(Double.parseDouble(values[3])));
return position;
}
private List<Position> decodeMessage(
Channel channel, SocketAddress remoteAddress, String sentence) throws ParseException {
Parser parser = new Parser(PATTERN, sentence);
if (!parser.matches()) {
return null;
}
String imei = parser.next();
DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, imei);
if (deviceSession == null) {
return null;
}
String version = parser.next();
int type = parser.nextInt();
List<Position> positions = new LinkedList<>();
switch (type) {
case 90:
sendResponse(channel, imei, version, type, getServer(channel));
break;
case 91:
String time = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss").format(new Date());
sendResponse(channel, imei, version, type, time + "|" + getServer(channel));
break;
case 1:
sendResponse(channel, imei, version, type, "0");
break;
case 2:
for (String fragment : parser.next().split("\\|")) {
positions.add(decodePosition(deviceSession, fragment));
}
break;
default:
break;
}
return positions.isEmpty() ? null : positions;
}
@Override
protected Object decode(
Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {
ByteBuf buf = (ByteBuf) msg;
buf.skipBytes(3); // header
buf.readUnsignedShort(); // length
String sentence = buf.toString(buf.readerIndex(), buf.readableBytes() - 3, StandardCharsets.US_ASCII);
buf.skipBytes(3); // footer
return decodeMessage(channel, remoteAddress, sentence);
}
}
|
