cors_support.conf

#
# CORS header support
#
# One way to use this is by placing it into a file called "cors_support"
# under your Nginx configuration directory and placing the following
# statement inside your **location** block(s):
#
#   include cors_support;
#
# As of Nginx 1.7.5, add_header supports an "always" parameter which
# allows CORS to work if the backend returns 4xx or 5xx status code.
#
# For more information on CORS, please see: http://enable-cors.org/
# Forked from this Gist: https://gist.github.com/michiel/1064640
#
if ( $request_method !~ ^(GET|POST|HEAD|OPTIONS|PUT|PATCH|DELETE)$ ) {
    return 444;
}

set $origin $http_origin;

if ($request_method ~ '(OPTIONS|GET|POST|PATCH|PUT|DELETE)') {
    add_header 'Access-Control-Allow-Origin' "$origin" always;
    add_header 'Access-Control-Allow-Methods' 'GET,POST,PATCH,PUT,DELETE,HEAD' always;
    add_header 'Access-Control-Allow-Headers' 'Content-Type, Accept, Authorization' always;
    add_header 'Access-Control-Allow-Credentials' 'true' always;
}

if ($request_method = 'OPTIONS') {
    add_header 'Access-Control-Expose-Headers' 'Date' always;

    # Some modern browsers now cap the CORS cache at 2 hours:
    add_header Access-Control-Max-Age 7200;
    add_header Content-Type 'text/plain charset=UTF-8';
    add_header Content-Length 0;
    return 204;
}

if ($request_method ~ '(GET|POST|PATCH|PUT|DELETE)') {
    add_header Access-Control-Allow-Origin "$origin" always;
    add_header Access-Control-Allow-Methods 'GET,POST,PATCH,PUT,DELETE,HEAD' always;
    add_header Access-Control-Allow-Headers 'Content-Type, Accept, Authorization' always;
    add_header Access-Control-Allow-Credentials true always;
}