Datapower XSLT File handling and storing.

Need XSLT, to extract, store and replace file in HTTP Post request. Http Post request is received on Datapower Gateway. It contains file uploaded from browser, which needs to be extracted, streamed / stripped / copied on local directory on appliance and request needs to be forwarded to back end as it is by sending dummy file in request. I do have code for this, but separately, needs to be orchestrated together nicely. Quick work of an hour for someone, who knows Datapower Appliance and its extension functions / SOMA Scripting.