90 lines
2.5 KiB
Java
90 lines
2.5 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.parser;
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import java.nio.charset.StandardCharsets;
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import java.time.Instant;
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import java.util.zip.DataFormatException;
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import java.util.zip.Inflater;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import biz.nellemann.syslogd.msg.SyslogMessage;
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public abstract class SyslogParser {
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private final static Logger log = LoggerFactory.getLogger(SyslogParser.class);
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public abstract SyslogMessage parse(final String input);
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public abstract SyslogMessage parse(final byte[] input);
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public abstract Instant parseTimestamp(final String dateString);
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/**
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* Converts syslog PRI field into Facility.
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*
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* @param pri
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* @return
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*/
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public int getFacility(String pri) {
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int priority = Integer.parseInt(pri);
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int facility = priority >> 3;
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return facility;
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}
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/**
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* Converts syslog PRI field into Severity.
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*
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* @param pri
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* @return
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*/
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public int getSeverity(String pri) {
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int priority = Integer.parseInt(pri);
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int severity = priority & 0x07;
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return severity;
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}
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protected String byteArrayToString(byte[] input) {
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return new String(input, 0, input.length, StandardCharsets.UTF_8);
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}
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protected byte[] decompress(byte[] data) {
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byte[] result = new byte[data.length * 2];
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try {
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// Decompress the bytes
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Inflater decompressor = new Inflater();
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decompressor.setInput(data, 0, data.length);
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//byte[] result = new byte[data.length * 2];
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decompressor.inflate(result);
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decompressor.end();
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// Decode the bytes into a String
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//uncompressed = new String(result, 0, resultLength, StandardCharsets.UTF_8);
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} catch (DataFormatException e) {
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log.error("decompress() - error: {}", e.getMessage());
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}
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return result;
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}
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}
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