Fix ALPN protocol identifier for HTTP/1.1 #142
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The ALPN identifier that https-proxy-agent uses for TLS is not correct. The IANA registry of valid values is here and you can see that for HTTP/1.1 it specifically has to be byte-identical to
http/1.1(note the slash) andhttp 1.1as used here is not a valid identifier.Because of this, ALPN negotiation always fails right now. Normally that's fine, because most TLS servers just fall back to plain HTTP anyway, but as of Node v19+, Node.js servers that use ALPN will reject all incoming connections that try to use ALPN but can't successfully agree on a protocol (according to the spec, everybody should be doing this really). Quite a lot of proxy servers do use ALPN, because it's effectively required to be able to use HTTP/2, so this may cause problems now that Node v20 is out (it breaks my tests, for one)
Anyway, it's fortunately a very quick and easy fix with no downside 😄