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<?php
/**
* A class for logging
*
* @author Lasse Birnbaum Jensen, SDU.
* @author Andreas Åkre Solberg, UNINETT AS. <andreas.solberg@uninett.no>
* @package simpleSAMLphp
* @version $ID$
*/
class SimpleSAML_Logger_LoggingHandlerFile implements SimpleSAML_Logger_LoggingHandler
{
/**
* This array contains the mappings from syslog loglevel to names. Copied
* more or less directly from SimpleSAML_Logger_LoggingHandlerErrorLog.
*/
private static $levelNames = array(
SimpleSAML_Logger::EMERG => 'EMERGENCY',
SimpleSAML_Logger::ALERT => 'ALERT',
SimpleSAML_Logger::CRIT => 'CRITICAL',
SimpleSAML_Logger::ERR => 'ERROR',
SimpleSAML_Logger::WARNING => 'WARNING',
SimpleSAML_Logger::NOTICE => 'NOTICE',
SimpleSAML_Logger::INFO => 'INFO',
SimpleSAML_Logger::DEBUG => 'DEBUG',
);
private $logFile = NULL;
private $processname = NULL;
private $format;
/**
* Build a new logging handler based on files.
*/
public function __construct()
{
$config = SimpleSAML_Configuration::getInstance();
assert($config instanceof SimpleSAML_Configuration);
// get the metadata handler option from the configuration
$this->logFile = $config->getPathValue('loggingdir', 'log/') .
$config->getString('logging.logfile', 'simplesamlphp.log');
$this->processname = $config->getString('logging.processname', 'simpleSAMLphp');
if (@file_exists($this->logFile)) {
if (!@is_writeable($this->logFile)) {
throw new Exception("Could not write to logfile: " . $this->logFile);
}
} else {
if (!@touch($this->logFile)) {
throw new Exception(
"Could not create logfile: " . $this->logFile .
" Loggingdir is not writeable for the webserver user."
);
}
}
SimpleSAML_Utilities::initTimezone();
}
/**
* Set the format desired for the logs.
*
* @param string $format The format used for logs.
*/
public function setLogFormat($format)
{
$this->format = $format;
}
/**
* Log a message to the log file.
*
* @param int $level The log level.
* @param string $string The formatted message to log.
*/
public function log($level, $string)
{
if ($this->logFile != NULL) {
// set human-readable log level. Copied from SimpleSAML_Logger_LoggingHandlerErrorLog.
$levelName = sprintf('UNKNOWN%d', $level);
if (array_key_exists($level, self::$levelNames)) {
$levelName = self::$levelNames[$level];
}
$formats = array('%process', '%level');
$replacements = array($this->processname, $levelName);
$matches = array();
if (preg_match('/%date(?:\{([^\}]+)\})?/', $this->format, $matches)) {
$format = "%b %d %H:%M:%S";
if (isset($matches[1])) {
$format = $matches[1];
}
array_push($formats, $matches[0]);
array_push($replacements, strftime($format));
}
$string = str_replace($formats, $replacements, $string);
file_put_contents($this->logFile, $string.PHP_EOL, FILE_APPEND);
}
}
}
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