I have:
fs.readFile(\'../services/Prescipcion.xml\', \"utf8\", function (err, data) {
console.log(\"err->\", err);
console.log(\"data\", data);
});
A full example that worked for me, based on other answer
var fs = require('fs');
var path = require('path');
var readStream = fs.createReadStream(path.join(__dirname, '../rooms') + '/rooms.txt', 'utf8');
let data = ''
readStream.on('data', function(chunk) {
data += chunk;
}).on('end', function() {
console.log(data);
});