when index.page preview in sitepublisher, it will get the long name in URL
e.g.
/iw-preview/52616e646f6d495654b09d98910c74c1d5258f1bcb461113351fdc566cb4e8c4d4a8557ccc914110aff61b74ca4ee321335f41906aac0e63f7d1eb76457f33fe/g3brxw9y.seed
the following code can get the index.page in livesite env, but not in preview mode, any idea how could we make this works in preview as well ?
request.getPageName()