how to send a file/document over HTTPS from PI 710 sys to a non-SAP sys

Hi,

we would like to send a file/document from a PI 710 system to a non-SAP system using HTTPS over internet. could any of you suggest solution in SAP PI 710. (note that we dont want to expose our PI system to Internet and also can not use FTP too.)

Thanks & Regard

Laxman