Something curious happening with the Vary header?

[jjb]

I recently starting having problems with IE, in that all versions of IE don't accept my fonts.

This wasn't always the case. I'm not sure when it started. Clearly I need to bisect my deploys and figure out when it started. But...

One of the issues I am suspecting is the Vary header, which has been documented as having strange issues with IE:

• http://kevindew.me/post/82823018422/ie-and-vary-origin
• http://stackoverflow.com/questions/7748140/font-face-eot-not-loading-over-https/23410136#23410136

As of this writing, both of these return Vary: Origin:

• curl -I -H 'Origin: https://medstro.com' https://d1hvwudqvjuczb.cloudfront.net/assets/medstroicons-a6b82410b9815847fd154b48d788aa92dd500dee14beb04bfc3fe46fa5bbce6d.svg\#medstroicons
• curl -I https://d1hvwudqvjuczb.cloudfront.net/assets/medstroicons-a6b82410b9815847fd154b48d788aa92dd500dee14beb04bfc3fe46fa5bbce6d.svg\#medstroicons

I'm not sure if a change I made recently introduced the Vary header or if something else entireley is at play.

Any thoughts on this? Is it possible font_assets is introducing this header at the wrong times?

[jjb]

I'm using master at 457dcfddc4318e83679e9a0935612924b7717085

[jjb]

I discovered this has nothing to do with font_assets and is due to my use of https://github.com/cyu/rack-cors... closing.