debug facebook canvas app after ssl restriction

I have a canvas iframe Facebook app. I updated the secure canvas URL with https url and it works fine. since October 1st, it is not allowed to a开发者_C百科ccess apps without ssl. I used to debug my app by creating a duplicate app with localhost as the canvas URL. Since October 1st (or actually since today...) it is not possible to access it due to the ssl restriction. How can I debug facebook app now??

In your account settings turn off 'Safe browsing' so you will be visiting Facebook without https. Then it does work for me (after turning on Sandbox mode that is).

Turn sandbox on

Apps on Facebook authentication and security migration

All Canvas and Page tab apps must convert to process signed_request (fb_sig will be removed) and obtain an SSL certificate for use in Secure Canvas URL and Secure Page Tab URL (unless you are in Sandbox mode).