Web API configuration to upload a file along with input data

Hi Team,


We have a requirement to get files from external system along with some input parameters to our process model via a web api.

The web api which starts a process would upload the file to the target folder and write/update data in respective appian DB tables.

How can we achieve this?

Request format : 

document - type (document/file)

id - type int

name - type text etc

This request can either be in form or json format.

Appian version used is 21.1

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