くらしTEPCO webからhourlyのデータを過去Nヶ月分とってくるスクリプト。なぜかうまくいかない。(csvが空....)

tepco_houry.js

LAST_N_MONTH = 1

const days = () => {
  const result = []
  for (let m of [...Array(LAST_N_MONTH).keys()]) {
    const today = new Date()
    const dt = new Date(today.setMonth(today.getMonth() - m))
    const lastDay = new Date(dt.getFullYear(), dt.getMonth() + 1, 0).getDate()
    for (let d of [...Array(lastDay).keys()].map(d => d + 1).sort((a, b) => b - a)) {
      result.push({
        "year": dt.getFullYear(),
        "month": dt.getMonth() + 1,
        "day": d,
      })
    }
  }
  return result
}


const get_hourly_data = () => {
  const get_options = get_login_options()
  const sheet = SpreadsheetApp.getActive().getSheetByName('hourly')
  let allResult = []
  for (let dt of days()) {
    let csv_url = `https://www.kurashi.tepco.co.jp/pf/ja/pc/mypage/learn/comparison.page?ReqID=CsvDL&year=${dt.year}&month=${dt.month}&day=${dt.day}`;

    const response = UrlFetchApp.fetch(csv_url, get_options);
    let content = response.getContentText("Shift-JIS");
    if (content.length) {
      let result = Utilities.parseCsv(content).slice(1)
      allResult = [...allResult, ...result]
    }
  }
  sheet.getRange(1, 1, allResult.length, allResult[0].length).setValues(allResult)
}