/**
* data downloaded by CUrl
* @return string
*/
protected function &curl()
{
$curl = new CUrl();
//$curl->setProxy();
$cnb = NULL;
foreach ($this->links as $key => $link) {
$curl->setOption(\CURLOPT_URL, $this->fillDate($link));
if ($curl->getErrorNumber() > 0) {
if ($key == 0) {
throw new ExchangeException('Let\'s check internet connection.');
}
continue;
} else {
$cnb .= $curl->getResult();
}
}
return $cnb;
}
