The idea was simply to send the content of a file to the script via its URL address.
We know that we can send a plain text, or even another type of file directly to the script using the Web.UriEncode block, we can also send a file converted to String base64,... but the challenge was to send the information through "fetch" when it was not located at the root of localhost.
In this topic we manage to send by fecht: file_example_XLSX_100_ASD.xlsx when it's on localhost, but we don't get it when it's on ASD.
@Kevinkun 's code sends the content, but using base64.