[Reverse Proxy] Modify reverse proxy request

[nettnikl]

Is your feature request related to a problem? Please describe.
I am implementing a reverse proxy which does some stuff to the requests before forwarding. I've tried flask, but i need a solution able to handle big files, so i came here. My project needs to be implemented in python for unrelated reasons.

Currently for debugging purposes i'm modifying proxy/http/server/reverse.py:89 ff, uncommenting the "Update Host header" change, and this is fine-ish for development.
But i'm planning to use this in production, and adding more functionality there, so i'd need a way to modify requests going upstream.

Describe the solution you'd like
Some method to overwrite in the reverse proxy base plugin where i can modify the requests - while still being able to directly stream big upstream content (think of a TB here).

Describe alternatives you've considered

• implementing parts of the solution in python, and the actual handling of proxied content in nginx or similar
• forking this code and adding it directly, which makes it hard to update and maintain
• different reverse proxy projects in python (are there even any production ready ones actually?)

Additional context
This possibility was already suggested to be possible in #1045

In-fact, we can provide a ReverseProxyBasePlugin hook which allows developers to modify the request before dispatching to upstream server.

[abhinavsingh]

IIUC correctly, we are talking about following feature

• Make it possible to have a dynamic reverse proxy #1132

We'll likely address it in upcoming release, include support for self-signed certificates, ability to provide custom openssl path. I estimate this to be out next month sometime. I hope that fits with your project timeline.

[nettnikl]

Thank you for the quick response.
Next month sounds good for a release - for now, what branch can you recommend to look at for developing a demo?

[abhinavsingh]

@nettnikl Unfortunately, there is no current branch. I believe once onto it, might take a few hours to carve out a developer level APIs for reverse proxy ecosystem. Till then feel free to hack through it :). I'll try to gather various requirements that folks have added through several issues/discussions and try to encapsulate the same in the APIs

[abhinavsingh]

@nettnikl #1252 will add support for modifying the request object before the request gets routed. Give it a try when you can. Let me know if this isn't working as expected. Best