public static function getAccessControlPolicy($bucket, $uri = '')
	{
		$rest = new S3Request('GET', $bucket, $uri, self::$endpoint);
		$rest->setParameter('acl', null);
		$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::getAccessControlPolicy({$bucket}, {$uri}): [%s] %s",
			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);
			return false;
		}

		$acp = array();
		if (isset($rest->body->Owner, $rest->body->Owner->ID, $rest->body->Owner->DisplayName))
			$acp['owner'] = array(
				'id' => (string)$rest->body->Owner->ID, 'name' => (string)$rest->body->Owner->DisplayName
			);

		if (isset($rest->body->AccessControlList))
		{
			$acp['acl'] = array();
			foreach ($rest->body->AccessControlList->Grant as $grant)
			{
				foreach ($grant->Grantee as $grantee)
				{
					if (isset($grantee->ID, $grantee->DisplayName)) // CanonicalUser
						$acp['acl'][] = array(
							'type' => 'CanonicalUser',
							'id' => (string)$grantee->ID,
							'name' => (string)$grantee->DisplayName,
							'permission' => (string)$grant->Permission
						);
					elseif (isset($grantee->EmailAddress)) // AmazonCustomerByEmail
						$acp['acl'][] = array(
							'type' => 'AmazonCustomerByEmail',
							'email' => (string)$grantee->EmailAddress,
							'permission' => (string)$grant->Permission
						);
					elseif (isset($grantee->URI)) // Group
						$acp['acl'][] = array(
							'type' => 'Group',
							'uri' => (string)$grantee->URI,
							'permission' => (string)$grant->Permission
						);
					else continue;
				}
			}
		}
		return $acp;
	}