Upstream HTTP/1 server through authenticated (SQUID) proxy

[jeratora]

Description:
Is it possible to configure Envoy so that an incoming request is forwarded to an upstream server through an corporate proxy requiring authentication ? (credentials being set in Envoy).

The pipeline would look like this : client --> sidecar Envoy (TLS origination + proxy credentials) --> Corporate Squid Proxy --> upstream server (REST)

I was thinking about using CONNECT but I'm not sure about HTTP1/1 complete support. As a fallback, a direct response + a LUA script using OpenRESTY to make proxied calls to the upstream server. But to be honest, I would prefer a pure "proxy" solution.

Thanks in advance for any hint / pointer / sample configuration.

Relevant Links:
#11308

[cortex93]

@jeratora you will find a sample at #11308 (comment)

[github-actions]

This issue has been automatically marked as stale because it has not had activity in the last 30 days. It will be closed in the next 7 days unless it is tagged "help wanted" or "no stalebot" or other activity occurs. Thank you for your contributions.

[github-actions]

This issue has been automatically closed because it has not had activity in the last 37 days. If this issue is still valid, please ping a maintainer and ask them to label it as "help wanted" or "no stalebot". Thank you for your contributions.