how to get the view source page of a url that have already logged-in in objective-c?

Question

I want to open a url which I have already logged into in Chrome, and this line of code successfully opens it in Chrome:

[[NSWorkspace sharedWorkspace] openURL:url]

However the source page is not coming through using this line of code:

NSString *webSource = [NSString stringWithContentsOfURL:url usedEncoding:&encoding error:&error];

Is there any special case with this. How can I get the view page source programatically?