[TT-9985] Add HTTP proxy protocol handling

[ldmonster]

Is your feature request related to a problem? Please describe.
We already have an TCP handling of ha-proxy-protocol, but still not support HTTP/HTTPS.
In our case, we want to parse ha-proxy protocol in tyk, not any service before or after.

Describe the solution you'd like
We already have a solution for ourselves, but we want to tyk use it, because we want to use new stable versions with this feature.
We add new GatewayConfig toggle, to enable all ha-proxy-protocol handling on HTTP/HTTPS/h2c.

{
  "enable_proxy_protocol_http": true
}

Describe alternatives you've considered
We already trying to use nginx before or after, but it looks like overhead, when we can do it on tyk

Additional context
This feature already requested before
#2300 (comment)
Our branch
https://github.com/ldmonster/tyk/tree/feature/add-proxy-protocol

[andyo-tyk]

Hi @ldmonster,

Thanks for getting in touch with this. I've taken a look at the original ticket and can see that it was auto-closed by a bot that we were running a while back, because the bot detected it as stale.

We're very open to community PRs, which are a lot easier to inspect than your fork of the Tyk codebase. Would you consider raising a PR, then we'll be able to take a look more promptly?

Thank you for supporting Tyk!

[ArcRiiad]

Hey folks! any update on supporting Proxy Protocol?

[ldmonster]

Hey folks! any update on supporting Proxy Protocol?

We have PR

#5464

[OlegPS]

Hi @andyo-tyk , could you please take a look?

[ldmonster]

@andyo-tyk PTAL

[andyo-tyk]

Hi @OlegPS @ldmonster,

Sorry for the slow reply on this, not sure how I missed it. We'll take a look at this, please bear with me.