nextcloud/inc/Log/file.php

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2010-03-10 15:03:40 +03:00
<?php
/**
* $Header: /repository/pear/Log/Log/file.php,v 1.37 2004/01/19 08:02:40 jon Exp $
*
* @version $Revision: 1.37 $
* @package Log
*/
/**
* The Log_file class is a concrete implementation of the Log abstract
* class that logs messages to a text file.
*
* @author Jon Parise <jon@php.net>
* @author Roman Neuhauser <neuhauser@bellavista.cz>
* @since Log 1.0
* @package Log
*
* @example file.php Using the file handler.
*/
class Log_file extends Log
{
/**
* String containing the name of the log file.
* @var string
* @access private
*/
var $_filename = 'php.log';
/**
* Handle to the log file.
* @var resource
* @access private
*/
var $_fp = false;
/**
* Should new log entries be append to an existing log file, or should the
* a new log file overwrite an existing one?
* @var boolean
* @access private
*/
var $_append = true;
/**
* Integer (in octal) containing the log file's permissions mode.
* @var integer
* @access private
*/
var $_mode = 0644;
/**
* String containing the format of a log line.
* @var string
* @access private
*/
var $_lineFormat = '%1$s %2$s [%3$s] %4$s';
/**
* String containing the timestamp format. It will be passed directly to
* strftime(). Note that the timestamp string will generated using the
* current locale.
* @var string
* @access private
*/
var $_timeFormat = '%b %d %H:%M:%S';
/**
* Hash that maps canonical format keys to position arguments for the
* "line format" string.
* @var array
* @access private
*/
var $_formatMap = array('%{timestamp}' => '%1$s',
'%{ident}' => '%2$s',
'%{priority}' => '%3$s',
'%{message}' => '%4$s',
'%\{' => '%%{');
/**
* String containing the end-on-line character sequence.
* @var string
* @access private
*/
var $_eol = "\n";
/**
* Constructs a new Log_file object.
*
* @param string $name Ignored.
* @param string $ident The identity string.
* @param array $conf The configuration array.
* @param int $level Log messages up to and including this level.
* @access public
*/
function Log_file($name, $ident = '', $conf = array(),
$level = PEAR_LOG_DEBUG)
{
$this->_id = md5(microtime());
$this->_filename = $name;
$this->_ident = $ident;
$this->_mask = Log::UPTO($level);
if (isset($conf['append'])) {
$this->_append = $conf['append'];
}
if (!empty($conf['mode'])) {
$this->_mode = $conf['mode'];
}
if (!empty($conf['lineFormat'])) {
$this->_lineFormat = str_replace(array_keys($this->_formatMap),
array_values($this->_formatMap),
$conf['lineFormat']);
}
if (!empty($conf['timeFormat'])) {
$this->_timeFormat = $conf['timeFormat'];
}
if (!empty($conf['eol'])) {
$this->_eol = $conf['eol'];
} else {
$this->_eol = (strstr(PHP_OS, 'WIN')) ? "\r\n" : "\n";
}
register_shutdown_function(array(&$this, '_Log_file'));
}
/**
* Destructor
*/
function _Log_file()
{
if ($this->_opened) {
$this->close();
}
}
/**
* Creates the given directory path. If the parent directories don't
* already exist, they will be created, too.
*
* @param string $path The full directory path to create.
* @param integer $mode The permissions mode with which the
* directories will be created.
*
* @return True if the full path is successfully created or already
* exists.
*
* @access private
*/
function _mkpath($path, $mode = 0700)
{
static $depth = 0;
/* Guard against potentially infinite recursion. */
if ($depth++ > 25) {
trigger_error("_mkpath(): Maximum recursion depth (25) exceeded",
E_USER_WARNING);
return false;
}
/* We're only interested in the directory component of the path. */
$path = dirname($path);
/* If the directory already exists, return success immediately. */
if (is_dir($path)) {
$depth = 0;
return true;
}
/*
* In order to understand recursion, you must first understand
* recursion ...
*/
if ($this->_mkpath($path, $mode) === false) {
return false;
}
return @mkdir($path, $mode);
}
/**
* Opens the log file for output. If the specified log file does not
* already exist, it will be created. By default, new log entries are
* appended to the end of the log file.
*
* This is implicitly called by log(), if necessary.
*
* @access public
*/
function open()
{
if (!$this->_opened) {
/* If the log file's directory doesn't exist, create it. */
if (!is_dir(dirname($this->_filename))) {
$this->_mkpath($this->_filename);
}
/* Obtain a handle to the log file. */
$this->_fp = fopen($this->_filename, ($this->_append) ? 'a' : 'w');
$this->_opened = ($this->_fp !== false);
/* Attempt to set the log file's mode. */
@chmod($this->_filename, $this->_mode);
}
return $this->_opened;
}
/**
* Closes the log file if it is open.
*
* @access public
*/
function close()
{
/* If the log file is open, close it. */
if ($this->_opened && fclose($this->_fp)) {
$this->_opened = false;
}
return ($this->_opened === false);
}
/**
* Flushes all pending data to the file handle.
*
* @access public
* @since Log 1.8.2
*/
function flush()
{
return fflush($this->_fp);
}
/**
* Logs $message to the output window. The message is also passed along
* to any Log_observer instances that are observing this Log.
*
* @param mixed $message String or object containing the message to log.
* @param string $priority The priority of the message. Valid
* values are: PEAR_LOG_EMERG, PEAR_LOG_ALERT,
* PEAR_LOG_CRIT, PEAR_LOG_ERR, PEAR_LOG_WARNING,
* PEAR_LOG_NOTICE, PEAR_LOG_INFO, and PEAR_LOG_DEBUG.
* @return boolean True on success or false on failure.
* @access public
*/
function log($message, $priority = null)
{
/* If a priority hasn't been specified, use the default value. */
if ($priority === null) {
$priority = $this->_priority;
}
/* Abort early if the priority is above the maximum logging level. */
if (!$this->_isMasked($priority)) {
return false;
}
/* If the log file isn't already open, open it now. */
if (!$this->_opened && !$this->open()) {
return false;
}
/* Extract the string representation of the message. */
$message = $this->_extractMessage($message);
/* Build the string containing the complete log line. */
$line = sprintf($this->_lineFormat, strftime($this->_timeFormat),
$this->_ident, $this->priorityToString($priority),
$message) . $this->_eol;
/* Write the log line to the log file. */
$success = (fwrite($this->_fp, $line) !== false);
/* Notify observers about this log message. */
$this->_announce(array('priority' => $priority, 'message' => $message));
return $success;
}
}
?>