102 lines
3.0 KiB
Java
102 lines
3.0 KiB
Java
/*
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Copyright 2020 mark.nellemann@gmail.com
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package biz.nellemann.syslogd;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import picocli.CommandLine;
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import picocli.CommandLine.Command;
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import java.io.IOException;
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import java.util.concurrent.Callable;
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@Command(name = "syslogd",
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mixinStandardHelpOptions = true,
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description = "Basic syslog server.",
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versionProvider = biz.nellemann.syslogd.VersionProvider.class)
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public class SyslogServer implements Callable<Integer>, LogListener {
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private final static Logger log = LoggerFactory.getLogger(SyslogServer.class);
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@CommandLine.Option(names = {"-p", "--port"}, description = "Listening port [default: 514].")
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private int port = 514;
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@CommandLine.Option(names = "--no-udp", negatable = true, description = "Listen on UDP [default: true].")
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boolean udpServer = true;
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@CommandLine.Option(names = "--no-tcp", negatable = true, description = "Listen on TCP [default: true].")
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boolean tcpServer = true;
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@CommandLine.Option(names = "--no-ansi", negatable = true, description = "Output ANSI colors [default: true].")
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boolean ansiOutput = true;
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@CommandLine.Option(names = "--rfc5424", description = "Parse RFC-5424 messages [default: RFC-3164].")
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boolean rfc5424 = false;
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public static void main(String... args) {
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int exitCode = new CommandLine(new SyslogServer()).execute(args);
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System.exit(exitCode);
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}
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@Override
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public Integer call() throws IOException {
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if(udpServer) {
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UdpServer udpServer = new UdpServer(port);
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udpServer.addEventListener(this);
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udpServer.start();
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}
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if(tcpServer) {
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TcpServer tcpServer = new TcpServer(port);
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tcpServer.addEventListener(this);
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tcpServer.start();
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}
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return 0;
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}
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@Override
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public void onLogEvent(LogEvent event) {
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// Parse message
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String message = event.getMessage();
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SyslogMessage msg = null;
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try {
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if(rfc5424) {
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msg = SyslogParser.parseRfc5424(message);
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} else {
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msg = SyslogParser.parseRfc3164(message);
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}
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} catch(Exception e) {
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log.error("Problem parsing message: ", e);
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}
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if(msg != null) {
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if(ansiOutput) {
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System.out.println(msg.toAnsiString());
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} else {
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System.out.println(msg);
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}
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}
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}
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}
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