A script for mitmproxy making old rocket.chat servers work with newer client apps (the "Name is running an unsupported version of Rocket.Chat" screen)

rocketChat-serverApiVersionSpoof.py

import json

from mitmproxy import http

# A script for Mitmproxy to make RocketChat client apps always work with old server versions.
# by Marcelektro

API_VERSION_URL = "https://your-rocket-chat/api/info"



def response(flow: http.HTTPFlow) -> None:

    # print(f"pretty_url: {flow.request.pretty_url}")

    if flow.request.pretty_url == API_VERSION_URL:

        flow.intercept()

        responseText = flow.response.text

        try:
            responseJson = json.loads(responseText)
        except json.JSONDecodeError as error:
            print("Failed to decode response: ", error)
            flow.resume()
            return

        # Set 'version' in response json to null.
        # It somehow works lol
        responseJson['version'] = None

        flow.response.set_text(json.dumps(responseJson))

        flow.resume()

        print("Intercepted /api/info.")