Nodejs is not receiving any code from Flask app. - node.js

Question

I am really new in node js and a little bit more experienced in flaks. I am trying to connect a nodejs backend with a flask api. Basically I am sending a file that was uploaded in the nodejs app for processing (converting to another format) to my flask app.
For sending the data I am using request. In this way:
app.post('/converttest', uploader.single('file'), function(req,res){
var file = req.file,
result = {
error: 0,
uploaded: []
};
flow.exec(
function() { // Read temp File
fs.readFile(file.path, this);
},
function(err, data) { // Upload file to S3
var formData = {
file: data,
};
requestPack.post({url:'http://127.0.0.1:5000/api/resource/converter', formData: formData});
},
function(err, httpResponse, body) { //Upload Callback
if (err) {
return console.error('upload failed:', err);
}
res.redirect('/console');
});
});
Then I am receiving the file for processing in the flask app, like:
#app.route('/api/resource/converter', methods = ['POST','GET'])
def converter_csv():
if request.method == 'POST':
f = request.form['file']
if not f:
abort(400)
print('-----Converting-------')
file = open("temp/converting.txt","w")
file.write(f)
#....conversion process...
# Finish the process
return Response(converted_file,status=200)
In my console for the localhost of the flask app, I am getting:
127.0.0.1 - - [09/Aug/2017 15:47:59] "POST /api/resource/converter HTTP/1.1" 200 -
However my nodejs app did not receive any response. It just got frozen.
I appreciate any orientation anyone can give me. Thanks.

Answer 1

I think flow.exec is not in proper order
router.post('/converttest', uploader.single('file'), function(req, res) {
var filePath = req.file.path;
fs.readFile(filePath, 'utf8', function(err, data) { //change format reading as required
try {
formData = {file:data}
requestPack.post({url:'http://127.0.0.1:5000/api/resource/converter', formData: formData});
} catch(err) {
return console.error('upload failed:', err);
res.redirect('/console')
}
fs.unlink(filePath);}); });

Answer 2

I ended up using requestify. Seems like they make it a little bit easier for beginners like me:
var requestify = require('requestify');
app.get('/convertupload', function(req,res){
res.render('pages/convertupload');
});
app.post('/converttest', uploader.single('file'), function(req,res){
var file = req.file,
result = {
error: 0,
uploaded: []
};
flow.exec(
function() { // Read temp File
fs.readFile(file.path,this);
},
function(err, data) { // Upload file to S3
var formData = {
file: data
};
requestify.post('http://127.0.0.1:5000/api/resource/converter', {
form: formData
})
.then(function(response) {
// Get the response body (JSON parsed or jQuery object for XMLs)
console.log(response)
response.getBody();
});
res.redirect('/login');
});
});