[NT] Correct the hostname for proxy configurations with port numbers #2069
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Description, Motivation and Context
This PR fixes a bug in the proxy hostname parsing, where we currently accidentally use the wrong field from the parsed
URL
object to refer to the hostname of the proxy. https://developer.mozilla.org/en-US/docs/Web/API/URL — thehost
attribute is of the form<host>:<port>
if present, whereashostname
is just<host>
. How we use the parsed attribute expects just a hostname without a port number.This PR fixes this bug by using the
hostname
attribute of the parsed URL instead of thehost
attribute. While I was here, I also added tests for this proxy URL parsing function given there were none before.Checklist: