Plack::Middleware::CrossOrigin adds Cross Origin Request Sharing headers used by
modern browsers to allow XMLHttpRequest to work across domains. This module will
also help protect against CSRF attacks in some browsers.

This module attempts to fully conform to the CORS spec, while allowing
additional flexibility in the values specified for the of the headers.

WWW: https://metacpan.org/release/Plack-Middleware-CrossOrigin