Nodejs - Rest api call with option --data from a file - node.js

Question

I am making rest api calls from a nodejs application.
My curl calls looks like this:
curl -X PUT -iv -H "Authorization: bearer <token>" -H "Content-Type: application/json" -H "Accept: application/json" -H "X-Spark-Service-Instance: <spark-instance>" --data "#pipeline.json" -k https://<url>
I want to have a similar call in Nodejs. I am unable to understand how to have the data sent which is in a json file which in curl call was --data "#pipeline.json".
My Nodejs code looks like this:
var token = req.body.mlToken;
var urlToHit = req.body.url;
var SPARKINSTANCE = req.body.sparkInstance;
var b = "bearer ";
var auth = b.concat(token);
var headers = {
'Content-Type': 'application/json',
'Authorization': auth,
'Accept': 'application/json',
'X-Spark-Service-Instance': SPARKINSTANCE
}
var options= {
url: urlToHit,
method: 'PUT',
headers: headers
}
console.log(urlToHit);
request(options, callback);
function callback(error, response, body) {...}

Answer 1

You can either use the request library to pipe the request as so:
var fs = require('fs');
var options= {
url: urlToHit,
method: 'PUT',
headers: headers
}
fs.createReadStream('./pipeline.json')
.pipe(request.put(options, callback))
Or, using plain Node.js, read the file in to memory asynchronously and the once loaded, make a put request like this:
var fs = require('fs');
// Will need this for determining 'Content-Length' later
var Buffer = require('buffer').Buffer
var headers = {
'Content-Type': 'application/json',
'Authorization': auth,
'Accept': 'application/json',
'X-Spark-Service-Instance': SPARKINSTANCE
}
var options= {
host: urlToHit,
method: 'PUT',
headers: headers
}
// After readFile has read the whole file into memory, send request
fs.readFile('./pipeline.json', (err, data) => {
if (err) throw err;
sendRequest(options, data, callback);
});
function sendRequest (options, postData, callback) {
var req = http.request(options, callback);
// Set content length (RFC 2616 4.3)
options.headers['Content-Length'] = Buffer.byteLength(postData)
// Or other way to handle error
req.on('error', (e) => {
console.log(`problem with request: ${e.message}`);
});
// write data to request body
req.write(postData);
req.end();
}