HTTP 400 on IBM Cloud (Cloud Foundry) with Node.js an Express - ibm-cloud

Question

I have a simple app with two routes, which I use locally and on IBM Cloud/Cloud Foundry (512 M RAM)
/
returns "Hello World!" & 200 locally and on the IBM Cloud
/getData
returns some data locally & 200
on cloud it returns 400, no logs
Edit:
var express = require('express');
var app = express();
var bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
extended: true
}));
var cors = require("cors"); // Cors
app.use(cors());
var port = process.env.PORT || 3000;
app.get('/', (req, res) => res.send('Hello World!'))
// *************** GETDATA ***************************************
app.get('/getData', function (req, res) {
var request = require("request");
var httpHeaderOptions = {
accept: "application/json",
"content-type": "application/json",
apikey: req.headers.apikey
};
var restoptions = {
method: "GET",
url: req.headers.route,
headers: httpHeaderOptions
};
// console.log("headers: " + JSON.stringify(req.headers));
// console.log("GET DOCS: \n", JSON.stringify(restoptions));
request(restoptions, function (error, response, body) {
console.log(typeof (body));
body_json = JSON.parse(body);
if (error) {
console.error("Failed: %s", error.message);
body = {
"error": error.message
};
res.status(400).json(body);
} else {
console.log("Success: \n", body);
res.status(200).json(body_json);
}
});
});
// *************** POST DOC ***************************************
app.post('/postData', function (req, res) {
var request = require("request");
var httpHeaderOptions = {
accept: "application/json",
"content-type": "application/json",
apikey: req.headers.apikey
};
var restoptions = {
method: "POST",
url: req.headers.route,
headers: httpHeaderOptions,
body: req.body,
json: true
};
console.log("headers: " + JSON.stringify(req.headers));
console.log("POST DOC: \n", JSON.stringify(restoptions));
request(restoptions, function (error, response, body) {
if (typeof (body) == 'object' && Object.keys(body).length === 0) {
// unknown error, empty resposne
res.status(400).json(body);
} else {
console.log("body: " + JSON.stringify(body));
if (error) {
console.error("Failed: %s", error.message);
body = {
"error": error.message
};
res.status(400).json(body);
} else {
console.log("Success: \n", JSON.stringify(body));
res.status(200).json(body);
}
}
});
});
// *********************
app.post('/watsonAssistant', function (req, res) {
var request = require("request");
var reqURL = "https://hackathon-jps.eu-de.mybluemix.net/watsonAssistant";
console.log("URL: \n", reqURL);
console.log("POST Body: \n", JSON.stringify(req.body));
var httpHeaderOptions = {
accept: "application/json",
"content-type": "application/json",
};
var restoptions = {
method: "POST",
url: reqURL,
headers: httpHeaderOptions,
body: req.body,
json: true
};
console.log("send request \n");
request(restoptions, function (error, response, body) {
console.log("in request \n");
if (error) {
console.error("Failed: %s", error.message);
body = {
"error": error.message
};
res.status(400).json(body);
} else {
console.log("Success: \n", body[0]);
res.status(200).json(body[0]);
}
});
});
// Start the server
app.listen(port, function () {
console.log('simple forward server is running')
});
link to the code

Answer 1

This will be because whatever req.headers.route is set to, is not visible to the app when it is running in the cloud. Your first check should be on error. Your second check should be if body is not null, and an object instead you immediately JSON.parse body, which may be throwing a parsing exception.