Trying to POST and retrieve XML data (insecure XMLHttpRequest)

Hi,

Trying to POST from a https server and retrieve XML data from a http server and receive this error:

"was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://XXX.XX.XXX.XX:XXXX/server/wms?SERVICE=WMS&VERSION=1.1.1&R…...'. This request has been blocked; the content must be served over HTTPS."

Is there any NGINX configuration to allow this XML data into a SSL secured site through NGINX?

Thanks in advance,
Attropos