Promise-based sample fetching a JWT from the 128T REST API.

get128tToken.js

/*******************************************************************************
*                                                                              *
*  Promise-based sample fetching a JWT from the 128T REST API.                 *
*                                                                              *
*******************************************************************************/
const https = require('https')

const host128t = 'my.128t.host.com' // Address or FQDN of 128T host
const apiUser = 'admin' // Authorized API user
const apiSecret = 'mySup3rS3cr3t' // API user secret

// REST body to contain JSON object containing API username and password
const reqBody = JSON.stringify({'username':apiUser,'password':apiSecret})

// set up HTTP(S) request options
let reqOptions = {
  host : host128t,
  path : '/api/v1/login',
  method : 'POST',
  headers : {
    'content-type' : 'application/json',
    'content-length' : Buffer.byteLength(reqBody, 'utf8')
  },
  rejectUnauthorized : false
}

// Promise returning function to get JWT
const getToken = function() {

  return new Promise((resolve, reject) => {

    const request = https.request(reqOptions, (response) => {

      // handle http errors
      if (response.statusCode < 200 || response.statusCode > 299) {
         reject(new Error('Failed to load page, status code: ' + response.statusCode))
      }
      const body = []
      response.on('data', (chunk) => body.push(chunk))
      response.on('end', () => resolve(body.join('')))
    })

    // handle connection errors
    request.on('error', (err) => reject(err))
    // write JSON to request
    request.write(reqBody)
    request.end()
  })
}

// Begin getting token
getToken()
  .then((data) => {
    // handle results
    process.stdout.write(`API returned: ${data}\n`)
    process.exit(0)
  })

  .catch((err) => {
    // handle error
    process.stderr.write(`API request failed: ${err}\n`)
    process.exit(1)
  })