From ea8730325866dbe61e873adcfc8d5875bf7b9be1 Mon Sep 17 00:00:00 2001 From: Anton Tananaev Date: Wed, 31 May 2017 21:21:20 +1200 Subject: Implement custom Watch frame decoder --- src/org/traccar/protocol/WatchFrameDecoder.java | 46 +++++++++++++++++++++++++ src/org/traccar/protocol/WatchProtocol.java | 4 +-- 2 files changed, 48 insertions(+), 2 deletions(-) create mode 100644 src/org/traccar/protocol/WatchFrameDecoder.java (limited to 'src/org') diff --git a/src/org/traccar/protocol/WatchFrameDecoder.java b/src/org/traccar/protocol/WatchFrameDecoder.java new file mode 100644 index 000000000..b02048079 --- /dev/null +++ b/src/org/traccar/protocol/WatchFrameDecoder.java @@ -0,0 +1,46 @@ +/* + * 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.buffer.ChannelBuffer; +import org.jboss.netty.buffer.ChannelBuffers; +import org.jboss.netty.channel.Channel; +import org.jboss.netty.channel.ChannelHandlerContext; +import org.jboss.netty.handler.codec.frame.FrameDecoder; + +import java.nio.charset.StandardCharsets; + +public class WatchFrameDecoder extends FrameDecoder { + + private static final int MESSAGE_HEADER = 20; + + @Override + protected Object decode( + ChannelHandlerContext ctx, Channel channel, ChannelBuffer buf) throws Exception { + + if (buf.readableBytes() >= MESSAGE_HEADER) { + ChannelBuffer lengthBuffer = ChannelBuffers.dynamicBuffer(); + buf.getBytes(buf.readerIndex() + MESSAGE_HEADER - 4 - 1, lengthBuffer, 4); + int length = Integer.parseInt(lengthBuffer.toString(StandardCharsets.US_ASCII), 16) + MESSAGE_HEADER + 1; + if (buf.readableBytes() >= length) { + return buf.readBytes(length); + } + } + + return null; + } + +} diff --git a/src/org/traccar/protocol/WatchProtocol.java b/src/org/traccar/protocol/WatchProtocol.java index f664691c3..72a260423 100644 --- a/src/org/traccar/protocol/WatchProtocol.java +++ b/src/org/traccar/protocol/WatchProtocol.java @@ -1,5 +1,5 @@ /* - * Copyright 2015 - 2016 Anton Tananaev (anton@traccar.org) + * Copyright 2015 - 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. @@ -51,7 +51,7 @@ public class WatchProtocol extends BaseProtocol { serverList.add(new TrackerServer(new ServerBootstrap(), getName()) { @Override protected void addSpecificHandlers(ChannelPipeline pipeline) { - pipeline.addLast("frameDecoder", new CharacterDelimiterFrameDecoder(1024, ']')); + pipeline.addLast("frameDecoder", new WatchFrameDecoder()); pipeline.addLast("stringEncoder", new StringEncoder()); pipeline.addLast("stringDecoder", new StringDecoder()); pipeline.addLast("objectEncoder", new WatchProtocolEncoder()); -- cgit v1.2.3