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/*
* Copyright 2019 - 2024 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.handler.network;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import jakarta.inject.Inject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.traccar.NetworkMessage;
import org.traccar.config.Config;
import org.traccar.config.Keys;
import org.traccar.helper.BufferUtil;
import org.traccar.helper.NetworkUtil;
import org.traccar.model.LogRecord;
import org.traccar.session.ConnectionManager;
import java.nio.charset.StandardCharsets;
public class StandardLoggingHandler extends ChannelDuplexHandler {
private static final Logger LOGGER = LoggerFactory.getLogger(StandardLoggingHandler.class);
private final String protocol;
private ConnectionManager connectionManager;
private boolean decodeTextData;
public StandardLoggingHandler(String protocol) {
this.protocol = protocol;
}
@Inject
public void setConfig(Config config) {
decodeTextData = config.getBoolean(Keys.LOGGER_TEXT_PROTOCOL);
}
@Inject
public void setConnectionManager(ConnectionManager connectionManager) {
this.connectionManager = connectionManager;
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
LogRecord record = createLogRecord(ctx, msg);
log(ctx, false, record);
super.channelRead(ctx, msg);
if (record != null) {
connectionManager.updateLog(record);
}
}
@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
log(ctx, true, createLogRecord(ctx, msg));
super.write(ctx, msg, promise);
}
private LogRecord createLogRecord(ChannelHandlerContext ctx, Object msg) {
if (msg instanceof NetworkMessage networkMessage) {
if (networkMessage.getMessage() instanceof ByteBuf data) {
LogRecord record = new LogRecord(ctx.channel().localAddress(), networkMessage.getRemoteAddress());
record.setProtocol(protocol);
if (decodeTextData && BufferUtil.isPrintable(data, data.readableBytes())) {
record.setData(data.getCharSequence(
data.readerIndex(), data.readableBytes(), StandardCharsets.US_ASCII).toString()
.replace("\r", "\\r").replace("\n", "\\n"));
} else {
record.setData(ByteBufUtil.hexDump(data));
}
return record;
}
}
return null;
}
private void log(ChannelHandlerContext ctx, boolean downstream, LogRecord record) {
if (record != null) {
StringBuilder message = new StringBuilder();
message.append("[").append(NetworkUtil.session(ctx.channel())).append(": ");
message.append(protocol);
message.append(downstream ? " > " : " < ");
message.append(record.getAddress().getHostString());
message.append("] ");
message.append(record.getData());
LOGGER.info(message.toString());
}
}
}
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