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author | Iván Ávalos <avalos@disroot.org> | 2021-12-27 18:22:07 -0600 |
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committer | Iván Ávalos <avalos@disroot.org> | 2021-12-27 18:22:07 -0600 |
commit | f03b999d6d17e53c1c1e1aa2f9271d03f12f2264 (patch) | |
tree | a16d409887e65e4211e0f8ea4fc73a86e637a032 /src/main/java/org/traccar/protocol/JsonFrameDecoder.java | |
parent | 3a528ddc88f72f39ff9566cf5e0f54938b1584ef (diff) | |
parent | 790db6295f130e64c8346f13985dd0c15f938b40 (diff) | |
download | traccar-server-f03b999d6d17e53c1c1e1aa2f9271d03f12f2264.tar.gz traccar-server-f03b999d6d17e53c1c1e1aa2f9271d03f12f2264.tar.bz2 traccar-server-f03b999d6d17e53c1c1e1aa2f9271d03f12f2264.zip |
Merge branch 'master' into suntech-fixes
Diffstat (limited to 'src/main/java/org/traccar/protocol/JsonFrameDecoder.java')
-rw-r--r-- | src/main/java/org/traccar/protocol/JsonFrameDecoder.java | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/protocol/JsonFrameDecoder.java b/src/main/java/org/traccar/protocol/JsonFrameDecoder.java new file mode 100644 index 000000000..b2d7fbd53 --- /dev/null +++ b/src/main/java/org/traccar/protocol/JsonFrameDecoder.java @@ -0,0 +1,55 @@ +/* + * Copyright 2021 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.channel.Channel; +import io.netty.channel.ChannelHandlerContext; +import org.traccar.BaseFrameDecoder; + +public class JsonFrameDecoder extends BaseFrameDecoder { + + @Override + protected Object decode( + ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception { + + int startIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '{'); + if (startIndex >= 0) { + + buf.readerIndex(startIndex); + + int currentIndex = startIndex + 1; + int nesting = 1; + while (currentIndex < buf.writerIndex() && nesting > 0) { + byte currentByte = buf.getByte(currentIndex); + if (currentByte == '{') { + nesting += 1; + } else if (currentByte == '}') { + nesting -= 1; + } + currentIndex += 1; + } + + if (nesting == 0) { + return buf.readRetainedSlice(currentIndex - startIndex); + } + + } + + return null; + } + +} |