Need autotest. Right now, all of tst_qhttp.cpp is passing.

Err, how do I provide an HTTP server that refuses connections???

Connect to “qt-test-server” port 90. That one refuses connections.

Set your /etc/hosts to have qt-test-server pointing to a valid host.

That gives ConnectionRefusedError, which is handled ok, rather than RemoteHostClosedError, which is where the bug is.

I tried re-enabling connectionClose(), but that one (www.fon.com) fails with QAbstractSocket::SslHandshakeFailedError, so that’s different again.
The commented-out one (nexus.passport.com) just works, no error.

I don’t know how to unittest RemoteHostClosedError, but I'm 100% sure of this fix; the server I was using here (in a VM, not a public HTTP website) was consistently giving that error….

A QTcpServer should do…

I give up. If you won’t take my fix unless I put in more hours into it, that’s your loss.

Sorry, I've run the QHttp unit test with this change and it introduces regressions:

FAIL! : tst_QHttp::get(WithoutProxy:failprot_02_0) Compared values are not the same

  Actual (res.value().success): 0
  Expected ("success"): 1  
  Loc: [/home/tmacieir/src/troll/qt-main/tests/auto/qhttp/tst_qhttp.cpp(391)]  

FAIL! : tst_QHttp::get(WithoutProxy:failprot_02_1) Compared values are not the same

  Actual (res.value().success): 0
  Expected ("success"): 1  
  Loc: [/home/tmacieir/src/troll/qt-main/tests/auto/qhttp/tst_qhttp.cpp(391)]  

FAIL! : tst_QHttp::get(WithSocks5Proxy:failprot_02_0) Compared values are not the same

  Actual (res.value().success): 0
  Expected ("success"): 1  
  Loc: [/home/tmacieir/src/troll/qt-main/tests/auto/qhttp/tst_qhttp.cpp(391)]  

FAIL! : tst_QHttp::get(WithSocks5Proxy:failprot_02_1) Compared values are not the same

  Actual (res.value().success): 0
  Expected ("success"): 1  
  Loc: [/home/tmacieir/src/troll/qt-main/tests/auto/qhttp/tst_qhttp.cpp(391)]

I also added the test I had wanted you to write. See e8f45c5ba8371053817f13e70d78b06f229d8666.