Handle private network preflight call #354
Merged
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Chrome has a preflight check for local network requests that requires our loopback listener to respond in a specific way in order to receive the proper GET request.
Chrome document: https://developer.chrome.com/blog/private-network-access-preflight/
This document also says we need to include the
Access-Control-Allow-Origin
header as well in order to succeed, but in my (admittedly limited) tests that wasn't necessary. If it's deemed prudent, I can add that to this PR as well.