This repository started out as a question: Why does a reqwest download stall
forever when switching between WiFi / Cellular networks on macOS or iOS?
Which prompted this thread on URLO and this StackOverflow question, and this discussion on the reqwest GitHub Discussions forum.
The reason it stalls is that the underlying network stack simply really wants the TCP connection to succeed, and doesn't throw any errors.
I have mitigated the problem in this repostory by using an AsyncRead wrapper that I found on StackOverflow and modified it to return a Polling error when a certain timeout has been reached.