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<?php
/*
* @author Andreas Åkre Solberg <andreas.solberg@uninett.no>
* @package simpleSAMLphp
*/
class sspmod_statistics_LogCleaner {
private $statconfig;
private $statdir;
private $inputfile;
private $statrules;
private $offset;
/**
* Constructor
*/
public function __construct($inputfile = NULL) {
$this->statconfig = SimpleSAML_Configuration::getConfig('module_statistics.php');
$this->statdir = $this->statconfig->getValue('statdir');
$this->inputfile = $this->statconfig->getValue('inputfile');
$this->statrules = $this->statconfig->getValue('statrules');
$this->offset = $this->statconfig->getValue('offset', 0);
if (isset($inputfile)) $this->inputfile = $inputfile;
}
public function dumpConfig() {
echo 'Statistics directory : ' . $this->statdir . "\n";
echo 'Input file : ' . $this->inputfile . "\n";
echo 'Offset : ' . $this->offset . "\n";
}
public function clean($debug = FALSE) {
if (!is_dir($this->statdir))
throw new Exception('Statistics module: output dir do not exists [' . $this->statdir . ']');
if (!file_exists($this->inputfile))
throw new Exception('Statistics module: input file do not exists [' . $this->inputfile . ']');
$file = fopen($this->inputfile, 'r');
#$logfile = file($this->inputfile, FILE_IGNORE_NEW_LINES );
$logparser = new sspmod_statistics_LogParser(
$this->statconfig->getValue('datestart', 0), $this->statconfig->getValue('datelength', 15), $this->statconfig->getValue('offsetspan', 44)
);
$datehandler = new sspmod_statistics_DateHandler($this->offset);
$results = array();
$sessioncounter = array();
$i = 0;
// Parse through log file, line by line
while (!feof($file)) {
$logline = fgets($file, 4096);
// Continue if STAT is not found on line.
if (!preg_match('/STAT/', $logline)) continue;
$i++;
// Parse log, and extract epoch time and rest of content.
$epoch = $logparser->parseEpoch($logline);
$content = $logparser->parseContent($logline);
$action = trim($content[5]);
if (($i % 10000) == 0) {
echo("Read line " . $i . "\n");
}
$trackid = $content[4];
#echo "trackid: " . $content[4] . "\n";
if(!isset($sessioncounter[$trackid])) $sessioncounter[$trackid] = 0;
$sessioncounter[$trackid]++;
if ($debug) {
echo("----------------------------------------\n");
echo('Log line: ' . $logline . "\n");
echo('Date parse [' . substr($logline, 0, $this->statconfig->getValue('datelength', 15)) . '] to [' . date(DATE_RFC822, $epoch) . ']' . "\n");
print_r($content);
if ($i >= 13) exit;
}
}
$histogram = array();
foreach($sessioncounter AS $trackid => $sc) {
if(!isset($histogram[$sc])) $histogram[$sc] = 0;
$histogram[$sc]++;
}
ksort($histogram);
$todelete = array();
foreach($sessioncounter AS $trackid => $sc) {
if($sc > 200) $todelete[] = $trackid;
}
#print_r($histogram);
return $todelete;
}
public function store($todelete, $outputfile) {
echo "Preparing to delete [" .count($todelete) . "] trackids\n";
if (!is_dir($this->statdir))
throw new Exception('Statistics module: output dir do not exists [' . $this->statdir . ']');
if (!file_exists($this->inputfile))
throw new Exception('Statistics module: input file do not exists [' . $this->inputfile . ']');
$file = fopen($this->inputfile, 'r');
#$logfile = file($this->inputfile, FILE_IGNORE_NEW_LINES );
/* Open the output file in a way that guarantees that we will not overwrite a random file. */
if (file_exists($outputfile)) {
/* Delete existing output file. */
unlink($outputfile);
}
$outfile = fopen($outputfile, 'x'); /* Create the output file. */
$logparser = new sspmod_statistics_LogParser(
$this->statconfig->getValue('datestart', 0), $this->statconfig->getValue('datelength', 15), $this->statconfig->getValue('offsetspan', 44)
);
$i = 0;
// Parse through log file, line by line
while (!feof($file)) {
$logline = fgets($file, 4096);
// Continue if STAT is not found on line.
if (!preg_match('/STAT/', $logline)) continue;
$i++;
$content = $logparser->parseContent($logline);
$action = trim($content[5]);
if (($i % 10000) == 0) {
echo("Read line " . $i . "\n");
}
$trackid = $content[4];
if (in_array($trackid, $todelete)) {
#echo "Deleting entry with trackid: $trackid \n";
continue;
} else {
#echo "NOT Deleting entry with trackid: $trackid \n";
}
fputs($outfile, $logline);
}
fclose($file);
fclose($outfile);
}
}
?>
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