how to read json from local file

I have a series of json files located on a file server (in my case on the local PRTG server). I would like to process that json information

I see a few solutions, but i'm wondering if there is a better one.

I could set up a webserver, publish the files and than use the REST Custom BETA sensor. A template will convert the json into channels.

I could create a powershell script (EXE/Script Advanced sensor) that reads the json, processes it and recreate XML/Json to store the information in PRTG

Is there a possibility to read the json from disk and process it through a template?

thanks Bert van Hove

json powershell prtg