mitmproxy_duolingo.py

from mitmproxy import ctx
from mitmproxy.models import decoded
import codecs
import json

class Duolingo:
        def response(self, flow):
                if "/api/1/version_info" not in flow.request.url:
                        return
                data = json.loads(flow.response.content.decode('utf-8'))
                data["supported_directions"]["en"] = data["supported_directions"]["en"] + ["ro"]
                flow.response.content = str.encode(json.dumps(data))

def start():
        return Duolingo()