line-bot-gas-monitor

line-bot-gas-monitor.js

var token = 'LINE 的 Channel access token';

// 回傳群組 ID，沒用時要註解起來
function doPost(e) {
  var message = JSON.parse(e.postData.contents);
  var targetID = message.events[0].source.groupId;
  var replayToken = message.events[0].replyToken;
  var data = {
    replyToken: replayToken,
    messages: [
      {
        "type": "text",
        "text": "群組ID為：" + targetID
      },
    ]
  };
  var option = {
    method: 'post',
    headers: { Authorization: 'Bearer ' + token },
    contentType: 'application/json',
    payload: JSON.stringify(data)
  };
  
  UrlFetchApp.fetch('https://api.line.me/v2/bot/message/reply', option);
}

// 要監測的網址清單
var monitors = [
  'https://www.google.com.tw/',
  'https://www.microsoft.com/',
  'https://www.facebook.com/'
];

// LINE 機器人推播訊息
function sendMessage(message) {
  var data = {
    to: '這邊填群組ID 或 個人ID',
    messages: [
      {
        "type": "text",
        "text": message
      },
    ]
  };
  var option = {
    method: 'post',
    headers: { Authorization: 'Bearer ' + token },
    contentType: 'application/json',
    payload: JSON.stringify(data)
  };
  
  UrlFetchApp.fetch('https://api.line.me/v2/bot/message/push', option);
  
}

// 執行監測
var limit = 20000; // 這邊是回應超過多久就推播，單位：毫秒
function doMonitor() {
  for(var i = 0, len = monitors.length; i < len; i++) {
    var url = monitors[i];
    var start = new Date().getTime();
    var res = UrlFetchApp.fetch(url, { muteHttpExceptions: true }).getResponseCode();
    var end = new Date().getTime();
    var distance = end - start;
    
    // 先檢查回應碼是否為 200
    if(res === 200) {
      // 是 200 就計算時間
      var end = new Date().getTime();
      var distance = end - start;
      if(distance > limit) {
        sendMessage(url + '\n回應時間 ' + (Math.ceil(distance / 1000)) + ' 秒！回應碼：' + res)
      }
    }
    // 不是 200 就發訊息
    else {
      sendMessage(url + '\n回應碼異常：' + res)
    }
    
  }
}