prisme-flow/nodes/bridge/base64/base64.js

prisme platform flow engine

/**
 * Created by prisme.io on 09/06/2017.
 */

module.exports = function (RED) {
  'use strict'

  function Base64Node (n) {
    RED.nodes.createNode(this, n)
    var node = this
    this.on('input', function (msg) {
      if (msg.hasOwnProperty('payload')) {
        if (Buffer.isBuffer(msg.payload)) {
                    // Take binary buffer and make into a base64 string
          msg.payload = msg.payload.toString('base64')
          node.send(msg)
        } else if (typeof msg.payload === 'string') {
                    // Take base64 string and make into binary buffer
          var regexp = new RegExp('^[A-Za-z0-9+\/=]*$')
          if (regexp.test(msg.payload) && (msg.payload.length % 4 === 0)) {
            msg.payload = new Buffer(msg.payload, 'base64')
            node.send(msg)
          } else {
                        // node.log("Not a Base64 string - maybe we should encode it...");
            msg.payload = (new Buffer(msg.payload, 'binary')).toString('base64')
            node.send(msg)
          }
        } else {
          node.warn('This node only handles strings or buffers.')
        }
      } else { node.warn('No payload found to process') }
    })
  }
  RED.nodes.registerType('base64', Base64Node)
}