ViewOnline on 1.8.X does not work at all.

[Doudoux]

In file "op\op.ViewOnline.php"

Change
header("Content-Length: " . filesize($settings->_contentDir . $content->getDir() . $content->getFileName()));
header("Expires: 0");
header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");

readfile($settings->_contentDir . $content->getDir() . $content->getFileName());

to

header("Content-Length: " . filesize($settings->_contentDir . $content->getPath()));
header("Expires: 0");
header("Cache-Control: no-cache, must-revalidate");
header("Pragma: no-cache");

readfile($settings->_contentDir . $content->getPath());