Client TLS Example

gistfile1.txt

const tls = require('tls')
const fs = require('fs')
 
const PORT = 6001
const HOST = '0.0.0.0'
 
module.exports = (app) => {
  const Xml = app.drivers.xml
  const Encoder = app.drivers.encoder
 
  const { handleInput, initiate } = app.controllers.pos
 
  // Pass the certs to the server and let it know to process even unauthorized certs.
  const options = {
    // passphrase: 'test',
    //key: fs.readFileSync(socket.key),
    //cert: fs.readFileSync(socket.cert),
    // Necessary only if the server uses a self-signed certificate.
    ca: [fs.readFileSync(app.config.socket.cert)],
    rejectUnauthorized: false,
    strictSSL: false,
    // Necessary only if the server's cert isn't for "localhost".
    checkServerIdentity: () => {
      return null
    },
  }
 
  const _decode = async (data) => {
    let decoded = Encoder.decodeHex(data.toString().substr(8))
    console.log('Received decoded: ', decoded)
    let content = await Xml.parse(decoded)
    console.log('Received content: ', content)
    return content
  }
 
  const client = tls.connect(PORT, HOST, options, function () {
    // Check if the authorization worked
    if (client.authorized) {
      console.log('Connection authorized by a Certificate Authority.')
    } else {
      console.log('Connection not authorized: ' + client.authorizationError)
    }
    initiate(client)
  })
  client.setEncoding('hex')
  client.on('data', async function (data) {
    // Verify everything went well
    const content = await _decode(data)
    handleInput(client, content)
    // Close the connection after receiving the message
    // client.end()
  })
  client.on('close', function () {
    console.log('Connection closed')
  })
  // When an error ocoures, show it.
  client.on('error', function (error) {
    console.error('Client Error', error)
    // Close the connection after the error occurred.
    client.destroy()
  })
  return client
}