How to send request in Timestamp: yyyyMMddHHmmssffff format using Postman?

Question

I need to use Postman to send a request to the API and in the header I need to send the date in format yyyyMMddHHmmssffff.

I tried to use Moment.js this way, but it doesn’t seem to work:

const moment = require('moment');
pm.environment.set("timestamp", moment().format('YYYYMMDDHHmmssffff'));

Answer 1

In the documentation of Moment.js we can see that for the fractions of a second S (the letter "S" uppercase), so the format would look like this:

console.log(moment().format('YYYYMMDDHHmmssSSSS'));

<script src="https://momentjs.com/downloads/moment.min.js"></script>

In the same documentation we see that the letter f is not in the list of recognized formats.

This is an important point when using different date formatting languages and API’s. The letters corresponding to each field (year, month, day, hour, minute, second, etc.) are not necessarily the same, each one uses its own "pattern" (just compare Moment.js with PHP, Python and Java, for example). It is therefore important to always consult the documentation.

Answer 2

To get to the format you need it is possible to use only the methods of Date as the example below shows:

const a = new Date();
const yyyy = a.getFullYear();
const MM = (a.getMonth() + 1).toString().padStart(2, '0');
const dd = a.getDate().toString().padStart(2, '0');
const hh = a.getHours().toString().padStart(2, '0');
const mm = a.getMinutes().toString().padStart(2, '0');
const ss = a.getSeconds().toString().padStart(2, '0');
const ffff = a.getMilliseconds().toString().padStart(4, '0');

console.log(`${yyyy}${MM}${dd}${hh}${mm}${ss}${ffff}`);

To pass a value in the header:

const echoPostRequest = {
  url: 'https://postman-echo.com/post',
  method: 'POST',
  header: '<seu_cabeçalho>:<valor_data_formatada>', // << add seu valor aqui
  body: {
    mode: 'raw',
    raw: JSON.stringify({ key: 'this is json' })
  }
};

pm.sendRequest(echoPostRequest, function (err, res) {
  console.log(err ? err : res.json());
});