How to handle/get data for multipart/form-data requests

[PGriffith]

Unfortunately, there's no easy solution to parse incoming multipart data in Webdev - you basically have to do it yourself:

Decode "multipart/form-data" with WebDev

We have a Zebra label printer that can send HTTP POST requests when certain conditions are met, such as when the ribbon is low. It uses “multipart/form-data” content type, and I am having difficulties figuring out how to parse the data so I can decipher the exact nature of the alert. Does anyone know how I can decode “multipart/form-data” so I can decipher the alert message from the printer? I have tried a few different ways without success. I may be missing something obvious.