niconico-like-to-mylist.py

from mitmproxy.http import HTTPFlow
import requests

MYLIST_ID="00000000" # please replace with your mylist id

def response(flow: HTTPFlow):
    if flow.request.method != "POST":
        return
    if flow.request.host != "nvapi.nicovideo.jp":
        return
    if not flow.request.path.startswith("/v1/users/me/likes/items"):
        return
    if flow.response.status_code >= 300:
        return
    requests.post(flow.request.url.replace("/likes", "/mylists/" + MYLIST_ID).replace("?videoId", "?itemId"), headers={
        "Cookie": flow.request.headers.get("Cookie"),
        "User-Agent": flow.request.headers.get("User-Agent"),
        "X-Frontend-Id": flow.request.headers.get("X-Frontend-Id"),
        "X-Frontend-Version": flow.request.headers.get("X-Frontend-Version"),
        "X-Request-With": flow.request.headers.get("X-Request-With"),
    })