User blog comment:WikiPim/Wikia, what are you trying to do?/@comment-33628828-20120305044132/@comment-2200849-20120305143807

There are some wikis that do not permit one to use anything other than Special:upload and do not let one bypass it without filling in required information, e.g. Wookieepedia, which stores the corresponding Javascript in MediaWiki:Common.js.