[endofreach]

> The remote server is able to determine whether you are fetching the script using curl/browser or piped directly into bash

I think you must be mixing something up here. At least i would be very surprised to learn how pipes are that leaky over the wire. It would be very interesting. But i can't imagine how a remote would differentiate between curl and curl piped. And the article doesn't load unfortunately.

[Izmaki]

It has to do with how you can abuse how the TCP data is streamed, not that a web server detects a pipe.