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Avoid huge exception argument logging 

In some cases it might happen that you have an argument that deep down
somewhere has an array with a lot of entries (think thousands). Now
before we would just happily print them all. Which would fill the log.

Now it will just print the first 5. And add a line that there are N
more.

If you are on debug level we will still print them all.

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
This commit is contained in:
Roeland Jago Douma 2020-12-29 10:50:53 +01:00 committed by backportbot[bot]
parent af77e89e67
commit 6762e616f5
2 changed files with 23 additions and 5 deletions
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2
lib/private/Log.php
View File

@ -315,7 +315,7 @@ class Log implements ILogger, IDataLogger {
$app = $context['app'] ?? 'no app in context';
$level = $context['level'] ?? ILogger::ERROR;
$serializer = new ExceptionSerializer();
$serializer = new ExceptionSerializer($this->config);
$data = $serializer->serializeException($exception);
$data['CustomMessage'] = $context['message'] ?? '--';

26
lib/private/Log/ExceptionSerializer.php
View File

@ -32,6 +32,7 @@ use OC\Core\Controller\SetupController;
use OC\HintException;
use OC\Security\IdentityProof\Key;
use OC\Setup;
use OC\SystemConfig;
class ExceptionSerializer {
public const methodsWithSensitiveParameters = [
@ -91,6 +92,13 @@ class ExceptionSerializer {
'imagecreatefromstring',
];
/** @var SystemConfig */
private $systemConfig;
public function __construct(SystemConfig $systemConfig) {
$this->systemConfig = $systemConfig;
}
public const methodsWithSensitiveParametersByClass = [
SetupController::class => [
'run',
@ -162,11 +170,21 @@ class ExceptionSerializer {
$data = get_object_vars($arg);
$data['__class__'] = get_class($arg);
return array_map([$this, 'encodeArg'], $data);
} elseif (is_array($arg)) {
return array_map([$this, 'encodeArg'], $arg);
} else {
return $arg;
}
if (is_array($arg)) {
// Only log the first 5 elements of an array unless we are on debug
if ((int)$this->systemConfig->getValue('loglevel', 2) !== 0) {
$elemCount = count($arg);
if ($elemCount > 5) {
$arg = array_slice($arg, 0, 5);
$arg[] = 'And ' . ($elemCount - 5) . ' more entries, set log level to debug to see all entries';
}
}
return array_map([$this, 'encodeArg'], $arg);
}
return $arg;
}
public function serializeException(\Throwable $exception) {