XML-RPC Decode Hack

All,

Opened a thread on this here at:

https://www.ads-software.com/support/topic/xml-rpc-question?replies=15#post-2277990

Post is so old thought I should start over fresh.

One on WordPress.com at:

https://en.forums.wordpress.com/topic/posting-file-to-parent-post-using-xml-rpc?replies=2#post-521020

And Code Pastebin at:

https://pastebin.com/pSYxsB5B

Hoping someone else has some insight to share, would love to solve this problem.

Thanks!

TBNK