how to script interaction with a web site built on ASP?

[disclaimer : cross-posted on discussions.apple.com]

Hi,
I need to automate some interaction with a web app built on ASP. I don’t get much support from its developer (otherwise they could help with the data right away instead of fooling around on the site), and I could not reverse engineer the browser’s interaction with the site, so I resorted to GUI scripting (keystrokes and mouse clicks). This does not work either, because the delays are unpredictable, the resulting content can change, and even the layout is rendered differently by WebKit even after the exact same queries.

I have a general question to this knowledgable community (I am obviously no programmer), did I miss some obvious tool or line of attack? Could I reverse engineer the ASP queries without knowing how the site is coded ” what kind of traffic to analyze, how to log that, and what patterns to look for? Do you have an idea about an alternative to the GUI scripting? Or at least, do you know how to make pages generated by ASP rendered consistently, pixel by pixel, in any scriptable browser?

Thank you very much in advance!

Maybe using text item delimiters with HTML or cURL to navigate around a site. I’m not very familiar with ASP.