CTasksWebService::AddAttachment

function AddAttachment($listName, $listItemID, $fileName, $attachment)
{
	if (!$this->__Init())
		return $this->error;

	if (!$listName_original = CIntranetUtils::checkGUID($listName))
	{
		return new CSoapFault('Data error', 'Wrong GUID - '.$listName);
	}

	if ($attachment == '')
	{
		return new CSoapFault('Wrong attachment', 'Wrong attachment');
	}

	$listName = ToUpper(CIntranetUtils::makeGUID($listName_original));

	$listItemID = intval($listItemID);

	$dbRes = CTasks::GetByID($listItemID);
	if ($task = $dbRes->Fetch())
	{
		$fileName = str_replace(array('/', '\', '..'), '', $fileName); // minor security

		foreach ($task["FILES"] as $fileID)
		{
			$FILE = ToLower(basename(CFile::GetPath($fileID)));
			if ($FILE == ToLower($fileName))
			{
				Header('HTTP/1.1 500 Internal Server Error');

				$obDetail = new CXMLCreator('detail');
				$obDetail->addChild(CXMLCreator::createTagAttributed('errorstring xmlns="http://schemas.microsoft.com/sharepoint/soap/"', 'The specified name is already in use.'));
				$obDetail->addChild(CXMLCreator::createTagAttributed('errorcode xmlns="http://schemas.microsoft.com/sharepoint/soap/"', '0x81020067'));

				return new CSoapFault(
						'soap::Server',
						'Exception of type 'Microsoft.SharePoint.SoapServer.SoapServerException' was thrown.',
						$obDetail
				);
			}
		}

		$tmpFileName = CTempFile::GetFileName('sheet_happens');

		RewriteFile($tmpFileName, $attachment);

		$arFile = CFile::MakeFileArray($tmpFileName);
		$arFile['name'] = basename($fileName);
		$arFile['MODULE_ID'] = 'tasks';
		$arValue = array($FILE_ID = CFile::SaveFile($arFile, 'outlook/Lists/'.$listItemID));

		CTasks::AddFiles($task["ID"], $arValue);

		return array(
			'AddAttachmentResult' => '/tasks/getfile/' . (int) $listItemID
				. '/' . (int) $FILE_ID
				. '/' . urlencode(ToLower(basename(CFile::GetPath($FILE_ID))))
		);
	}
	else
	{
		return new CSoapFault('0x81020016', 'List item not found');
	}
}