How to set up CORS (cross-origin resource sharing) in Plesk for Linux?

Question

How to set up cross-origin resource sharing (CORS) in Plesk to display content from example1.com on example.com?

Answer

Note: CORS is supported in the following browsers:  Chrome 3+, Firefox 3.5+, Opera 12+, Safari 4+, Internet Explorer 8+

1. Log into Plesk UI on the source server, where domain example1.com is hosted.

2. Apply on of the following solutions:

   • Navigate to the tab Domains > example1.com > Apache and nginx settings and add the following directives to the section Additional directives for HTTP and to the section Additional directives for HTTPS:

     CONFIG_TEXT: Header set Access-Control-Allow-Origin "example.com"

   • Alternatively .htaccess file with the following content can be used instead of  Additional directives:

     CONFIG_TEXT: <IfModule mod_headers.c>
     Header always set Access-Control-Allow-Origin "example.com"
     </IfModule>

3. Check of Nginx is enabled at Plesk > Tools & Settings > Services management > nginx on the server. If static content needs to be displayed, add the following nginx directive to Domains > example1.com > Apache and nginx settings > Additional nginx directives and remove Apache directives added on step #2:

   CONFIG_TEXT: add_header Access-Control-Allow-Origin "example.com";

Additional information

• Enable CORS website.