RhinoInsideを用いてCPythonから属性ユーザテキストに書き込む(UnityWebアプリ編)

using UnityEngine.Networking;

...

IEnumerator GetAttribute(GameObject obj_selected)
{
    //パネルオブジェクトの名前をセット
    WWWForm form = new WWWForm();
    form.AddField("name_panel", obj_selected.name, Encoding.UTF8);
        
    UnityWebRequest webRequest = UnityWebRequest.Post(URL_Flask + "get_atrb", form);

    webRequest.downloadHandler = new DownloadHandlerBuffer();

    //URLに接続して待機
    yield return webRequest.SendWebRequest();

    if (webRequest.result == UnityWebRequest.Result.Success)//リクエスト成功
    {
        //通信成功。属性情報がセットされたはず
        string str_json = webRequest.downloadHandler.text;

        var lines_kvp = JsonConvert.DeserializeObject<Dictionary<string, object>>(str_json);

        foreach (var kvp in lines_kvp)
        {
            string key = kvp.Key;
            object value = kvp.Value;

            Debug.Log(key + " : " + value);

            ...
        }
    }
}

# -*- coding: UTF-8 -*-
import os, sys

import rhinoinside
rhinoinside.load()
import System
import Rhino

#Flaskの初期化
from flask import Flask, request, render_template, jsonify
from flask_cors import CORS

app = Flask(__name__)
app.config["JSON_AS_ASCII"] = False #for UTF-8 support
CORS(app) #CORS(クロス・オリジン・リソース・共有)の解決

dir_home = os.path.dirname(__file__)
path_3dm  = os.path.join(dir_home, "panelize.3dm")

...

#属性情報を受け取って.3dmの更新
@app.route('/update_atrb', methods=['POST'])
def UpdateAtrb():

    dict_atrb = {}

    print("update attributes:")
    for key in request.form.keys():
        value = request.form[key]
        dict_atrb[key] = value
        print("    {} : {}".format(key, value))

    #属性情報をセット
    set_atrb(dict_atrb)

    return "Updated!!!"

#.3dmファイルを開いて属性情報を更新
def set_atrb(dict_atrb):

    if not "002_PANEL_NAME" in dict_atrb.keys():
        return

    name_panel = dict_atrb["002_PANEL_NAME"]

    f3dm = Rhino.FileIO.File3dm.Read(path_3dm)
    if f3dm is None:
        return dict_atrb

    for obj in f3dm.Objects:
        if obj.Name != name_panel:
            continue
        atrb = obj.Attributes
        for key in dict_atrb.keys():
            #番号除外
            if not key[:3].isdecimal() or int(key[:3]) in [1,2,3]:
                continue

            #属性情報をセット
            value = dict_atrb[key]

            atrb.SetUserString(key, value)

        #ひとつ読めたら閉じる
        break

    #変更を保存
    f3dm.Write(path_3dm, version=6)
    f3dm.Dispose()