class method self.page_cache_extension

Most Rails requests do not have an extension, such as /weblog/new. In these cases, the page caching mechanism will add one in order to make it easy for the cached files to be picked up properly by the web server. By default, this cache extension is .html. If you want something else, like .php or .shtml, just set Base.page_cache_extension. In cases where a request already has an extension, such as .xml or .rss, page caching will not add an extension. This allows it to work well with RESTful apps.