making application crawlable, front-end is gwt and back-end is php

I'm building an application where the front-end is a gwt app and the
back-end is php. I'm using request builder to get data from the
server.

I need to make my app crawlable, but I'm not understanding on the
server side how to handle the unescaped fragment. I'm using a recess
php framework. The php app is a REST Interface where each URL map to
specific method of a controller class.

Can someone help me on this??

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