51Degrees Device Detection Node.js  4.4

51Degrees Device Detection for Node.js


This example shows how to use the 51Degrees Cloud service to lookup the details of a device based on a given 'TAC'. More background information on TACs can be found through various online sources such as Wikipedia.

This example is available in full on GitHub.

To run this example, you will need to create a resource key. The resource key is used as shorthand to store the particular set of properties you are interested in as well as any associated license keys that entitle you to increased request limits and/or paid-for properties.

You can create a resource key using the 51Degrees Configurator.

Required npm Dependencies:

  • fiftyone.pipeline.cloudrequestengine
  • fiftyone.pipeline.core
  • fiftyone.pipeline.engines
  • fiftyone.pipeline.engines.fiftyone
  • fiftyone.devicedetection.cloud


"PipelineOptions": {
"Elements": [
"elementName": "fiftyone.pipeline.cloudrequestengine/cloudRequestEngine",
"elementParameters": {
"resourceKey": "!!YOUR_RESOURCE_KEY!!"
"elementName": "../../../deviceDetectionCloud"
/* *********************************************************************
* This Original Work is copyright of 51 Degrees Mobile Experts Limited.
* Copyright 2022 51 Degrees Mobile Experts Limited, Davidson House,
* Forbury Square, Reading, Berkshire, United Kingdom RG1 3EU.
* This Original Work is licensed under the European Union Public Licence
* (EUPL) v.1.2 and is subject to its terms as set out below.
* If a copy of the EUPL was not distributed with this file, You can obtain
* one at https://opensource.org/licenses/EUPL-1.2.
* The 'Compatible Licences' set out in the Appendix to the EUPL (as may be
* amended by the European Commission) shall be deemed incompatible for
* the purposes of the Work and the provisions of the compatibility
* clause in Article 5 of the EUPL shall not apply.
* If using the Work as, or as part of, a network application, by
* including the attribution notice(s) required under Article 5 of the EUPL
* in the end user terms of the application under an appropriate heading,
* such notice(s) shall fulfill the requirements of that article.
* ********************************************************************* */
const path = require('path');
const fs = require('fs');
const { PipelineBuilder } = require('fiftyone.pipeline.core');
const ExampleUtils = require(path.join(__dirname, '/../exampleUtils'));
const constants = require(path.join(__dirname, '/../../../constants.js'));
const analyseTac = async function (tac, pipeline, output) {
// Create a flowdata instance.
const flowData = pipeline.createFlowData();
// After creating a flowdata instance, add the TAC as evidence.
flowData.evidence.add(constants.EVIDENCE_QUERY_TAC_KEY, tac);
await flowData.process();
output.write(`Which devices are associated with the TAC '${tac}'?\n`);
// The result is an array containing the details of any devices that match
// the specified TAC.
// The code in this example iterates through this array, outputting the
// vendor and model name of each matching device.
flowData.hardware.profiles.forEach(profile => {
const hardwareVendor = DataExtension.getValueHelper(profile, 'hardwarevendor');
const hardwareName = DataExtension.getValueHelper(profile, 'hardwarename');
const hardwareModel = DataExtension.getValueHelper(profile, 'hardwaremodel');
output.write(`\t${hardwareVendor} ${hardwareName} (${hardwareModel})\n`);
const run = async function (options, output) {
const resourceKey = OptionsExtension.getResourceKey(options);
// If we don't have a resource key then log an error
if (!resourceKey) {
'No resource key specified in the configuration file ' +
'\'51d.json\' or the environment variable ' +
`'${ExampleUtils.RESOURCE_KEY_ENV_VAR}'. The 51Degrees cloud ` +
'service is accessed using a \'ResourceKey\'. For more information ' +
'see ' +
'https://51degrees.com/documentation/_info__resource_keys.html. ' +
'TAC lookup is not available as a free service. This means that ' +
'you will first need a license key, which can be purchased from our ' +
'pricing page: https://51degrees.com/pricing. Once this is done, a resource ' +
'key with the properties required by this example can be created at ' +
'https://configure.51degrees.com/QKyYH5XT. You can now populate the ' +
'environment variable mentioned at the start of this message with the ' +
'resource key or pass it as the first argument on the command line.'
output.write('This example shows the details of devices ' +
'associated with a given \'Type Allocation Code\' or \'TAC\'.\n');
output.write('More background information on TACs can be ' +
'found through various online sources such as Wikipedia: ' +
// In this example, we use the FiftyOnePipelineBuilder and configure it from a file.
// For a demonstration of how to do this in code instead, see the
// NativeModelLookup example.
// For more information about builders in general see the documentation at
// https://51degrees.com/documentation/_concepts__configuration__builders__index.html
const pipeline = new PipelineBuilder().buildFromConfiguration(options);
// To monitor the pipeline we can put in listeners for various log events.
// Valid types are info, debug, warn, error
pipeline.on('error', console.error);
const tac1 = '35925406';
const tac2 = '86386802';
analyseTac(tac1, pipeline, output);
analyseTac(tac2, pipeline, output);
// Don't run the server if under TEST
if (process.env.JEST_WORKER_ID === undefined) {
const args = process.argv.slice(2);
// Use the supplied resource key or try to obtain one
// from the environment variable.
const resourceKey = args.length > 0 ? args[0] : process.env[ExampleUtils.RESOURCE_KEY_ENV_VAR];
// Load the configuration from a config file to a JSON object.
const options = JSON.parse(fs.readFileSync('51d.json'), 'utf8');
const resourceKeyFromConfig = OptionsExtension.getResourceKey(options);
if (!resourceKeyFromConfig || resourceKeyFromConfig.startsWith('!!')) {
OptionsExtension.setResourceKey(options, resourceKey);
run(options, process.stdout);
module.exports = {
run: run