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The NetCDF-Java Library is a Java interface to NetCDF files,
as well as to many other types of scientific data formats.
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/*
* Copyright 1998-2009 University Corporation for Atmospheric Research/Unidata
*
* Portions of this software were developed by the Unidata Program at the
* University Corporation for Atmospheric Research.
*
* Access and use of this software shall impose the following obligations
* and understandings on the user. The user is granted the right, without
* any fee or cost, to use, copy, modify, alter, enhance and distribute
* this software, and any derivative works thereof, and its supporting
* documentation for any purpose whatsoever, provided that this entire
* notice appears in all copies of the software, derivative works and
* supporting documentation. Further, UCAR requests that the user credit
* UCAR/Unidata in any publications that result from the use of this
* software or in any product that includes this software. The names UCAR
* and/or Unidata, however, may not be used in any advertising or publicity
* to endorse or promote any products or commercial entity unless specific
* written permission is obtained from UCAR/Unidata. The user also
* understands that UCAR/Unidata is not obligated to provide the user with
* any support, consulting, training or assistance of any kind with regard
* to the use, operation and performance of this software nor to provide
* the user with any updates, revisions, new versions or "bug fixes."
*
* THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
*/
package thredds.logs;
import java.util.regex.*;
import java.util.Date;
import java.io.BufferedReader;
import java.io.IOException;
import java.text.SimpleDateFormat;
/**
* Read TDS access logs
*
* @author caron
* @since Apr 10, 2008
*/
public class AccessLogParser implements LogReader.LogParser {
///////////////////////////////////////////////////////
// log reading
// sample
// 1 2 3 4 5 6 7 8 9
// 128.117.140.75 - - [02/May/2008:00:46:26 -0600] "HEAD /thredds/dodsC/model/NCEP/DGEX/CONUS_12km/DGEX_CONUS_12km_20080501_1800.grib2.dds HTTP/1.1" 200 - "null" "Java/1.6.0_05" 21
// 24.18.236.132 - - [04/Feb/2011:17:49:03 -0700] "GET /thredds/fileServer//nexrad/level3/N0R/YUX/20110205/Level3_YUX_N0R_20110205_0011.nids " 200 10409 "-" "-" 17
// 30/Sep/2009:23:50:47 -0600
private SimpleDateFormat formatFrom = new SimpleDateFormat("dd/MMM/yyyy:HH:mm:ss Z");
private static Pattern regPattern =
Pattern.compile("^(\\d+\\.\\d+\\.\\d+\\.\\d+) - (.*) \\[(.*)\\] \"(.*)\" (\\d+) ([\\-\\d]+) \"(.*)\" \"(.*)\" (\\d+)");
public LogReader.Log nextLog(BufferedReader dataIS) throws IOException {
String line = dataIS.readLine();
if (line == null) return null;
return parseLog(line);
/* try {
//System.out.println("\n"+line);
Matcher m = regPattern.matcher(line);
if (m.matches()) {
LogReader.Log log = new LogReader.Log();
log.ip = m.group(1);
log.date = convertDate( m.group(3));
String request = m.group(4);
log.returnCode = parse(m.group(5));
log.sizeBytes = parseLong(m.group(6));
log.referrer = m.group(7);
log.client = m.group(8);
log.msecs = parseLong(m.group(9));
String[] reqss = request.split(" ");
if (reqss.length == 3) {
log.verb = reqss[0].intern();
log.path = reqss[1];
log.http = reqss[2].intern();
}
return log;
}
} catch (Exception e) {
e.printStackTrace();
System.out.println("Cant parse " + line);
}
return null; */
}
LogReader.Log parseLog(String line) throws IOException {
try {
//System.out.println("\n"+line);
Matcher m = regPattern.matcher(line);
if (m.matches()) {
LogReader.Log log = new LogReader.Log();
log.ip = m.group(1);
log.date = convertDate( m.group(3));
String request = m.group(4);
log.returnCode = parse(m.group(5));
log.sizeBytes = parseLong(m.group(6));
log.referrer = m.group(7);
log.client = m.group(8);
log.msecs = parseLong(m.group(9));
String[] reqss = request.split(" ");
if (reqss.length == 3) {
log.verb = reqss[0].intern();
log.path = reqss[1];
log.http = reqss[2].intern();
} else if (reqss.length == 2) { // no HTTP/1.x
log.verb = reqss[0].intern();
log.path = reqss[1];
}
return log;
}
} catch (Exception e) {
e.printStackTrace();
System.out.println("Cant parse " + line);
}
return null;
}
private long convertDate(String accessDateFormat) {
// 30/Sep/2009:23:50:47 -0600
try {
Date d = formatFrom.parse(accessDateFormat);
return d.getTime(); // formatTo.toDateTimeStringISO(d);
} catch (Throwable t) {
System.out.printf("Bad date format = %s err = %s%n", accessDateFormat, t.getMessage());
}
return -1;
}
private int parse(String s) {
if (s.equals("-")) return 0;
return Integer.parseInt(s);
}
private long parseLong(String s) {
if (s.equals("-")) return 0;
return Long.parseLong(s);
}
// try problem logs
public static void main(String[] args) throws IOException {
AccessLogParser p = new AccessLogParser();
String line = "24.18.236.132 - - [04/Feb/2011:17:49:03 -0700] \"GET /thredds/fileServer//nexrad/level3/N0R/YUX/20110205/Level3_YUX_N0R_20110205_0011.nids \" 200 10409 \"-\" \"-\" 17";
Matcher m = regPattern.matcher(line);
System.out.printf("%s %s%n", m.matches(), m);
for (int i=0; i