ルート

from server import PromptServer
from aiohttp import web
routes = PromptServer.instance.routes
@routes.post('/my_new_path')
async def my_function(request):
    the_data = await request.post()
    # the_data now holds a dictionary of the values sent
    MyClass.handle_my_message(the_data)
    return web.json_response({})

import { api } from "../../scripts/api.js";
function send_message(node_id, message) {
    const body = new FormData();
    body.append('message',message);
    body.append('node_id', node_id);
    api.fetchApi("/my_new_path", { method: "POST", body, });
}