From e6b0e38e6d250253b62c41dac3f01a9309a8de7f Mon Sep 17 00:00:00 2001 From: Anton Tananaev Date: Sat, 6 Apr 2019 21:32:12 -0700 Subject: Implement Globalstar protocol --- .../org/traccar/protocol/GlobalstarProtocol.java | 39 +++++++ .../protocol/GlobalstarProtocolDecoder.java | 119 +++++++++++++++++++++ 2 files changed, 158 insertions(+) create mode 100644 src/main/java/org/traccar/protocol/GlobalstarProtocol.java create mode 100644 src/main/java/org/traccar/protocol/GlobalstarProtocolDecoder.java (limited to 'src/main') diff --git a/src/main/java/org/traccar/protocol/GlobalstarProtocol.java b/src/main/java/org/traccar/protocol/GlobalstarProtocol.java new file mode 100644 index 000000000..84cd5565b --- /dev/null +++ b/src/main/java/org/traccar/protocol/GlobalstarProtocol.java @@ -0,0 +1,39 @@ +/* + * Copyright 2019 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.handler.codec.http.HttpObjectAggregator; +import io.netty.handler.codec.http.HttpRequestDecoder; +import io.netty.handler.codec.http.HttpResponseEncoder; +import org.traccar.BaseProtocol; +import org.traccar.PipelineBuilder; +import org.traccar.TrackerServer; + +public class GlobalstarProtocol extends BaseProtocol { + + public GlobalstarProtocol() { + addServer(new TrackerServer(false, getName()) { + @Override + protected void addProtocolHandlers(PipelineBuilder pipeline) { + pipeline.addLast(new HttpResponseEncoder()); + pipeline.addLast(new HttpRequestDecoder()); + pipeline.addLast(new HttpObjectAggregator(65535)); + pipeline.addLast(new GlobalstarProtocolDecoder(GlobalstarProtocol.this)); + } + }); + } + +} diff --git a/src/main/java/org/traccar/protocol/GlobalstarProtocolDecoder.java b/src/main/java/org/traccar/protocol/GlobalstarProtocolDecoder.java new file mode 100644 index 000000000..ab9e5dccf --- /dev/null +++ b/src/main/java/org/traccar/protocol/GlobalstarProtocolDecoder.java @@ -0,0 +1,119 @@ +/* + * Copyright 2019 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 com.fasterxml.jackson.databind.util.ByteBufferBackedInputStream; +import io.netty.buffer.ByteBuf; +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 org.traccar.BaseHttpProtocolDecoder; +import org.traccar.DeviceSession; +import org.traccar.Protocol; +import org.traccar.helper.DataConverter; +import org.traccar.model.Position; +import org.w3c.dom.Document; +import org.w3c.dom.Node; +import org.w3c.dom.NodeList; + +import javax.xml.parsers.DocumentBuilder; +import javax.xml.parsers.DocumentBuilderFactory; +import javax.xml.parsers.ParserConfigurationException; +import javax.xml.xpath.XPath; +import javax.xml.xpath.XPathConstants; +import javax.xml.xpath.XPathExpression; +import javax.xml.xpath.XPathExpressionException; +import javax.xml.xpath.XPathFactory; +import java.net.SocketAddress; +import java.util.Date; +import java.util.LinkedList; +import java.util.List; + +public class GlobalstarProtocolDecoder extends BaseHttpProtocolDecoder { + + private DocumentBuilder documentBuilder; + private XPath xPath; + private XPathExpression messageExpression; + + public GlobalstarProtocolDecoder(Protocol protocol) { + super(protocol); + try { + DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance(); + builderFactory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true); + builderFactory.setFeature("http://xml.org/sax/features/external-general-entities", false); + builderFactory.setFeature("http://xml.org/sax/features/external-parameter-entities", false); + builderFactory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false); + builderFactory.setXIncludeAware(false); + builderFactory.setExpandEntityReferences(false); + documentBuilder = builderFactory.newDocumentBuilder(); + xPath = XPathFactory.newInstance().newXPath(); + messageExpression = xPath.compile("//stuMessages/stuMessage"); + } catch (ParserConfigurationException | XPathExpressionException e) { + throw new RuntimeException(e); + } + } + + @Override + protected Object decode( + Channel channel, SocketAddress remoteAddress, Object msg) throws Exception { + + FullHttpRequest request = (FullHttpRequest) msg; + + Document document = documentBuilder.parse(new ByteBufferBackedInputStream(request.content().nioBuffer())); + NodeList nodes = (NodeList) messageExpression.evaluate(document, XPathConstants.NODESET); + + List positions = new LinkedList<>(); + + for (int i = 0; i < nodes.getLength(); i++) { + Node node = nodes.item(i); + DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, xPath.evaluate("esn", node)); + if (deviceSession != null) { + + Position position = new Position(getProtocolName()); + position.setDeviceId(deviceSession.getDeviceId()); + + position.setValid(true); + position.setTime(new Date(Long.parseLong(xPath.evaluate("unixTime", node)) * 1000)); + + ByteBuf buf = Unpooled.wrappedBuffer( + DataConverter.parseHex(xPath.evaluate("payload", node).substring(2))); + + buf.readUnsignedByte(); // flags + + position.setLatitude(buf.readUnsignedMedium() * 90.0 / (1 << 23)); + if (position.getLatitude() > 90) { + position.setLatitude(position.getLatitude() - 180); + } + + position.setLongitude(buf.readUnsignedMedium() * 90.0 / (1 << 23)); + if (position.getLongitude() > 180) { + position.setLongitude(position.getLongitude() - 360); + } + + buf.readUnsignedByte(); // status + buf.readUnsignedByte(); // status + + positions.add(position); + + } + } + + sendResponse(channel, HttpResponseStatus.OK); + return positions; + } + +} -- cgit v1.2.3