This is a GAS library for creating and requesting the type of multipart/form-data using Google Apps Script. This library enhances Class UelFetchApp of Google Apps Script.
In order to fetch data from URL, there is Class UrlFetchApp in Google Apps Script. As the method for fetching, there is the method of
fetch(url, params). In the current stage which was released this library, when user want to request with the type of multipart/form-data, the request body is required to be created by the user. But it is a bit difficult to create the request body. I thought that if the request body for the type of multipart/form-data can be easily created, it might be also useful for other users. So I created this as a GAS library.
You can check this at https://github.com/tanaikech/FetchApp.