CMB_CreditCard.js

// 1. open https://xyk.cmbchina.com

// 2. login with your credential

// 3. paste the following into your browsers console:

var sessionId = '';

const getBody = month => `{"actionName":"getMonthlyDetailBill.do","x_traceid":"webapp","x_mchannel":"webapp","x_caller":".0","userSessionId":"${sessionId}","billDate":"${month}","businessType":"Normal"}`;

const selectedFields = [
  'amnt',
  'anOrg',
  'cardNo',
  'desc',
  'effectiveDte',
  'postingDte',
  'txnCurrAmt',
];

const data = [];

const getData = month => {
  fetch('https://xyk.cmbchina.com/getMonthlyDetailBill.do', {
    headers: {
      'Content-Type' : 'application/json;charset=UTF-8',
    },
    credentials: 'include',
    body: getBody(month),
    method: 'POST'
  })
  .then(res => res.json())
  .then(json => {
    json.data.detail.forEach(d => {
      const item = {};
      selectedFields.forEach(field => {
        item[field] = d[field];
      });
      data.push(item);
    })
  });
};


// 4. run the following to get monthly data
getData("201705")

// 5. run the following to export the data into tab splitted text
data
  .map(item =>
    selectedFields.map(k => item[k]).join('\t')
  )
  .join('\n')