awc gets ConnectionReset, reqwest works fine

[jakswa]

Hello I thought I'd open this in case I can learn what's differing here and whether it's worth more investigation.

I'm working on some transit/GTFS code and this line:

awc::Client::default().get("https://www.itsmarta.com/google_transit_feed/google_transit.zip")
    .send().await.unwrap()

results in this runtime error:

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Connect(Io(Os { code: 104, kind: ConnectionReset, message: "Connection reset by peer" }))'

To be up front: I think this could be a wonky IIS server doing weird things, and I'm ready to blame the server over awc. But the reason I opened this discussion is because I swapped in reqwest and the HTTP succeeds fine, letting me download this zip:

reqwest::get("https://www.itsmarta.com/google_transit_feed/google_transit.zip").await.unwrap()

This gives me ✅.

This is the only use case I have for reqwest and have a mind to switch back to awc if I can figure out what's causing the Connection reset by peer error. Thanks for your time and sorry if this is a pebkac ('problem exists between keyboard and chair').