On my companies intranet, the business had asked to allow the users to deposit a file into a shared folder for it to be auto-posted to the intranet site. Pretty much the same as a file upload, with direct access to the storage device on a different server (with filetype limitations).
Since I don't have any control over the users and their knowledge of Section 508 compliance, is there a method to valid the document prior to it being added to the page? Right now, I have a C# class that builds a list from approved folders within that directory. I just want to make sure that if the files are not accessible, that they do not get added to the list.
I am sorry to say that Chris is incorrect in his answer. Section 508 applies to all file types, not just applications. There is a scanner by HiSoftware called Compliance Sheriff, that might work, but it may break due to how big your site is. My recommendation is to train people to make files compliant.