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I wanted to create some public API with Node.JS which needs to deploy on Cloud foundry environment. In that I had to consume on-prem service. While consuming on-prem service in unauthenticate Node.JS app, throwing me error as Invaild Proxy Authorization Header. After lot of  search, I figure out the solution for it. So I'm thinking to write solution in one place.

In this blog post will explain you how to connect with on-prem services with Node.JS using XSUAA & Connectivity service instances.



  1. Create package.json file & update with it below code
    "name": "<APP_NAME>",
    "version": "1.0.0",
    "description": "",
    "main": "app.js",
    "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node app.js"
    "author": "Prashant Patil",
    "license": "ISC",
    "dependencies": {
    "@sap/xsenv": "^2.2.0",
    "body-parser": "^1.19.0",
    "express": "^4.16.4",
    "request": "^2.88.0",
    "request-promise": "^4.2.5"

  2. Create manifest.yml file & update with below code
    - name: test-app
    memory: 128M
    instances: 1
    - test-app-uaa
    - test-app-conn

  3. Create service instances mentioned in manifest.yml using CF CLI
    cf create-service xsuaa application test-app-uaa​

    cf create-service connectivity lite test-app-conn​

  4. Create app.js & paste below code, We are going connect to the on-prem service through connectivity service instance.
    const express = require('express');
    const rp = require('request-promise');
    const xsenv = require('@sap/xsenv');

    //For local run

    const http = require('http');
    var bodyParser = require('body-parser');
    const app = express();
    var server = http.createServer(app);
    const port = process.env.PORT || 3000;
    var jsonParser = bodyParser.json();
    var urlencodedParser = bodyParser.urlencoded({ extended: false });

    const conn_service = xsenv.getServices({ conn: { tag: 'connectivity' } }).conn;
    const uaa_service = xsenv.getServices({ uaa: { tag: 'xsuaa' } }).uaa;
    const sUaaCredentials = conn_service.clientid + ':' + conn_service.clientsecret;
    const proxy_url = 'http://'+conn_service["onpremise_proxy_host"] + ':' + conn_service["onpremise_proxy_port"];
    const onPremCred = '<OnpremSrvUser>:<OnpremSrvUserPassword>';

    server.listen(port, () => console.log(`test app listening at http://localhost:${port}`));'/getDetailsFromOnPrem',jsonParser , (req, res) => {
    return rp({
    uri: uaa_service.url + '/oauth/token',
    method: 'POST',
    headers: {
    'Authorization': 'Basic ' + Buffer.from(sUaaCredentials).toString('base64'),
    'Content-type': 'application/x-www-form-urlencoded'
    form: {
    'client_id': conn_service.clientid,
    'grant_type': 'client_credentials'
    }).then((data) => {
    const token = JSON.parse(data).access_token;

    return rp({
    uri: '<on-prem service url>',
    headers : {
    'Authorization': 'Basic ' + Buffer.from(onPremCred).toString('base64'),
    'Proxy-Authorization': 'Bearer ' + token,
    'Content-type': 'application/json'
    }).then((data) => {
    const d = JSON.parse(data);

    }).catch((error) => {

  5. Deploy app to CF
    cf push test-app​



if you have only one connector without location Id (default) in your sub-account, then do not provide 'SAP-Connectivity-SCC-Location_ID' as header.

If you have multiple Cloud connectors added in your sub-account then 'SAP-Connectivity-SCC-Location_ID'  header is must else it will trying connect with default cloud connector.




In this blog post you learned how to consume on-premise services in unauthenticated Node.JS app deployed on CF.


Hope this helps!



Prashant Patil



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