Process incoming messages in a standalone manner

[platomedical]

Is there a way to process incoming messages in a standalone manner?

Our public facing web server receives the incoming POST request and HEADERS. The incoming POST body is something like this:

------=_Part_46_1647577925.1730688787919
Content-Type: application/soap+xml;charset=UTF-8
Content-Transfer-Encoding: binary

<?xml version="1.0" encoding="UTF-8"?><S12:Envelope xmlns:S12="http://www.w3.org/2003/05/soap-envelope"><S12:Header>xxxxxxxxxxxxxxxxx</S12:Envelope>

------=_Part_46_1647577925.1730688787919
Content-Type: application/octet-stream
Content-Transfer-Encoding: binary
Content-Description: Attachment
Content-ID: <phase4-att-72664b53-dac6-483d-a710-10861487084a@cid>

xxxxxxxxxxxxxxxxx
------=_Part_46_1647577925.1730688787919--

Is there a way to pass this POST body along with the HEADERS to a Java function and get the response that will be sent back to our web server?