Node-Red POST multipart/form-data (http request) - node.js

Question

I would like to POST two data in multipart / form-data format using Node-RED.
(One for text data, one for voice data)
I set the function node and http request node as follows, but it does not seem to be POST.
I think that it is necessary to create a multi-part body and assign it to msg.body, but I do not know how to create a multi-part body of the voice data.
I do not know how to solve it, so someone would like to tell me.
function node
var request = global.get('requestModule');
var fs = global.get('fsModule');
msg.body = {};
msg.body = {
'apikey' : "**********",
'wav' : fs.createReadStream('/tmp/testtest.wav')
};
msg.headers = {};
msg.headers['Content-type'] = 'multipart/form-data';
return msg
http request(Property)
method ⇒ POST
URL ⇒ https://xxxxyyyzzz/
SSL/TLS ⇒ No
Basic ⇒ No
Output ⇒ JSON

Answer 1

The http request Node-Red core node support multipart/form-data POST out of the box.
Add a function node before your http request with this Function :
msg.headers = {};
msg.headers['Content-Type'] = 'multipart/form-data';
msg.headers['Accept'] = 'application/json';
msg.payload = {
'apikey': msg.apiKey,
'wav': {
value: msg.payload.invoice.file,
options: {
filename: 'testtest.wav',
contentType: 'audio/wav', // This is optionnal
}
}
}
return msg;
The http request node use Request nodejs library under the hood, and this one use form-data library for handling multipart, so all the options supported by these works.
The source code of the relevant part of http request handling multipart.