public static function setBucketLogging($bucket, $targetBucket, $targetPrefix = null)
	{
		// The S3 log delivery group has to be added to the target bucket's ACP
		if ($targetBucket !== null && ($acp = self::getAccessControlPolicy($targetBucket, '')) !== false)
		{
			// Only add permissions to the target bucket when they do not exist
			$aclWriteSet = false;
			$aclReadSet = false;
			foreach ($acp['acl'] as $acl)
			if ($acl['type'] == 'Group' && $acl['uri'] == 'http://acs.amazonaws.com/groups/s3/LogDelivery')
			{
				if ($acl['permission'] == 'WRITE') $aclWriteSet = true;
				elseif ($acl['permission'] == 'READ_ACP') $aclReadSet = true;
			}
			if (!$aclWriteSet) $acp['acl'][] = array(
				'type' => 'Group', 'uri' => 'http://acs.amazonaws.com/groups/s3/LogDelivery', 'permission' => 'WRITE'
			);
			if (!$aclReadSet) $acp['acl'][] = array(
				'type' => 'Group', 'uri' => 'http://acs.amazonaws.com/groups/s3/LogDelivery', 'permission' => 'READ_ACP'
			);
			if (!$aclReadSet || !$aclWriteSet) self::setAccessControlPolicy($targetBucket, '', $acp);
		}

		$dom = new DOMDocument;
		$bucketLoggingStatus = $dom->createElement('BucketLoggingStatus');
		$bucketLoggingStatus->setAttribute('xmlns', 'http://s3.amazonaws.com/doc/2006-03-01/');
		if ($targetBucket !== null)
		{
			if ($targetPrefix == null) $targetPrefix = $bucket . '-';
			$loggingEnabled = $dom->createElement('LoggingEnabled');
			$loggingEnabled->appendChild($dom->createElement('TargetBucket', $targetBucket));
			$loggingEnabled->appendChild($dom->createElement('TargetPrefix', $targetPrefix));
			// TODO: Add TargetGrants?
			$bucketLoggingStatus->appendChild($loggingEnabled);
		}
		$dom->appendChild($bucketLoggingStatus);

		$rest = new S3Request('PUT', $bucket, '', self::$endpoint);
		$rest->setParameter('logging', null);
		$rest->data = $dom->saveXML();
		$rest->size = strlen($rest->data);
		$rest->setHeader('Content-Type', 'application/xml');
		$rest = $rest->getResponse();
		if ($rest->error === false && $rest->code !== 200)
			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');
		if ($rest->error !== false)
		{
			self::__triggerError(sprintf("S3::setBucketLogging({$bucket}, {$targetBucket}): [%s] %s",
			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);
			return false;
		}
		return true;
	}