Does Safari support the Access-Control-Expose-Headers header?

Question

I need to read the Location header using XHR. I added the Access-Control-Expose-Headers header to the OPTIONS response and the answer where I need to read the header:

 Access-Control-Expose-Headers: Location 

This works in Chrome, Firefox, and IE10, but not in Safari 5.1.7.

Does Safari support the Access-Control-Expose-Headers header?

Answer 1

Looking at the CORS specification versions, I assume that Safari 5.1 (and similar versions) used the webkit assembly, which did not include Access-Control-Expose-Headers header support. This was not added to the draft CORS specification until July 2010. Safari 5.1 was launched in July 2011. According to this message flow, Access-Control-Expose-Headers support was not added to webkit until after November 2011, which means Safari 5.1 definitely did not support it. According to this website / safari support, support was not added until mid-January 2012, which means that the earliest version to support this support will be 5.1.7 (but maybe even later).