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<?php
/**
* Copyright (c) 2013 Bart Visscher <bartv@thisnet.nl>
* Copyright (c) 2014 Jordi Boggiano <j.boggiano@seld.be>
* Copyright (c) 2014 Olivier Paroz <owncloud@oparoz.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OC;
use \OCP\ILogger;
/**
* logging utilities
*
* This is a stand in, this should be replaced by a Psr\Log\LoggerInterface
* compatible logger. See https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-3-logger-interface.md
* for the full interface specification.
*
* MonoLog is an example implementing this interface.
*/
class Log implements ILogger {
private $logger;
/**
* @param string $logger The logger that should be used
*/
public function __construct($logger=null) {
// FIXME: Add this for backwards compatibility, should be fixed at some point probably
if($logger === null) {
$this->logger = 'OC_Log_'.ucfirst(\OC_Config::getValue('log_type', 'owncloud'));
call_user_func(array($this->logger, 'init'));
} else {
$this->logger = $logger;
}
}
/**
* System is unusable.
*
* @param string $message
* @param array $context
*/
public function emergency($message, array $context = array()) {
$this->log(\OC_Log::FATAL, $message, $context);
}
/**
* Action must be taken immediately.
*
* Example: Entire website down, database unavailable, etc. This should
* trigger the SMS alerts and wake you up.
*
* @param string $message
* @param array $context
*/
public function alert($message, array $context = array()) {
$this->log(\OC_Log::ERROR, $message, $context);
}
/**
* Critical conditions.
*
* Example: Application component unavailable, unexpected exception.
*
* @param string $message
* @param array $context
*/
public function critical($message, array $context = array()) {
$this->log(\OC_Log::ERROR, $message, $context);
}
/**
* Runtime errors that do not require immediate action but should typically
* be logged and monitored.
*
* @param string $message
* @param array $context
*/
public function error($message, array $context = array()) {
$this->log(\OC_Log::ERROR, $message, $context);
}
/**
* Exceptional occurrences that are not errors.
*
* Example: Use of deprecated APIs, poor use of an API, undesirable things
* that are not necessarily wrong.
*
* @param string $message
* @param array $context
*/
public function warning($message, array $context = array()) {
$this->log(\OC_Log::WARN, $message, $context);
}
/**
* Normal but significant events.
*
* @param string $message
* @param array $context
*/
public function notice($message, array $context = array()) {
$this->log(\OC_Log::INFO, $message, $context);
}
/**
* Interesting events.
*
* Example: User logs in, SQL logs.
*
* @param string $message
* @param array $context
*/
public function info($message, array $context = array()) {
$this->log(\OC_Log::INFO, $message, $context);
}
/**
* Detailed debug information.
*
* @param string $message
* @param array $context
*/
public function debug($message, array $context = array()) {
$this->log(\OC_Log::DEBUG, $message, $context);
}
/**
* Logs with an arbitrary level.
*
* @param mixed $level
* @param string $message
* @param array $context
*/
public function log($level, $message, array $context = array()) {
if (isset($context['app'])) {
$app = $context['app'];
} else {
$app = 'no app in context';
}
// interpolate $message as defined in PSR-3
$replace = array();
foreach ($context as $key => $val) {
// Allows us to dump arrays, objects and exceptions to the log
$val = $this->normalize($val);
$replace['{' . $key . '}'] = $val;
}
// interpolate replacement values into the message and return
$message = strtr($message, $replace);
$logger = $this->logger;
call_user_func(array($logger, 'write'), $app, $message, $level);
}
private function normalize($data) {
if (null === $data || is_scalar($data)) {
return $data;
}
if (is_array($data) || $data instanceof \Traversable) {
$normalized = array();
$count = 1;
foreach ($data as $key => $value) {
if ($count++ >= 1000) {
$normalized['...'] = 'Over 1000 items, aborting normalization';
break;
}
$normalized[$key] = $this->normalize($value);
}
//return $normalized;
return $this->toJson($normalized, true);
}
if (is_object($data)) {
if ($data instanceof \Exception) {
return $this->normalizeException($data);
}
$arrayObject = new \ArrayObject($data);
$serializedObject = $arrayObject->getArrayCopy();
return sprintf("[object] (%s: %s)", get_class($data), $this->toJson($serializedObject, true));
}
if (is_resource($data)) {
return '[resource]';
}
return '[unknown(' . gettype($data) . ')]';
}
private function normalizeException(\Exception $e) {
$data = array(
'class' => get_class($e),
'message' => $e->getMessage(),
'file' => $e->getFile() . ':' . $e->getLine(),
);
$trace = $e->getTrace();
foreach ($trace as $frame) {
if (isset($frame['file'])) {
$data['trace'][] = $frame['file'] . ':' . $frame['line'];
} else {
$data['trace'][] = $this->toJson($frame, true);
}
}
if ($previous = $e->getPrevious()) {
$data['previous'] = $this->normalizeException($previous);
}
return $this->toJson($data, true);
}
private function toJson($data, $ignoreErrors = false) {
// suppress json_encode errors since it's twitchy with some inputs
if ($ignoreErrors) {
if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
return @json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
}
return @json_encode($data);
}
if (version_compare(PHP_VERSION, '5.4.0', '>=')) {
return json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
}
return json_encode($data);
}
}
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