nginx CORS configuration

gistfile1.txt

location /api {
    proxy_pass http://localhost:8080/api;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    add_header Access-Control-Allow-Origin *;

    if ($request_method = OPTIONS ) {
        add_header Allow 'POST, GET, PUT, DELETE, OPTIONS';
        add_header Access-Control-Allow-Origin *;
        add_header Access-Control-Allow-Headers 'accept, origin, content-type';
        add_header Access-Control-Allow-Methods 'POST, GET, PUT, DELETE, OPTIONS';
        return 200;
    }

}