Transfer files to dropbox from node js without browser based oauth authentication - node.js

Question

I am running a nodejs + express based api server from heroku and using the dropbox-js library. Here's what I'd like to do:
A user hits a specific api endpoint and kicks off the process.
Generate some text files via a node process and save them on the server
Transfer these files to a dropbox that I own using my own credentials (user and dropbox app).
There will never be a case when a random user needs to do this.. it's a team account and this is an internal tool.
The part that is tripping me up is that dropbox wants to open a browser window and get permission from me to connect to the app. The issue is that I obviously can't click the button when the process is running on the heroku instance.
Is there any way for me to authorize access to the app totally in node?
I feel like I could potentially use a phantomJS process to click the button - but it seems too complicated and I'd like to avoid it if possible.
Here is my authentication code:
// Libraries
var Dropbox = require('dropbox');
var DROPBOX_APP_KEY = "key";
var DROPBOX_APP_SECRET = "secret";
var dbClient = new Dropbox.Client({
key: DROPBOX_APP_KEY, secret: DROPBOX_APP_SECRET, sandbox: false
});
dbClient.authDriver(new Dropbox.Drivers.NodeServer(8191));
dbClient.authenticate(function(error, client) {
if (error) {
console.log("Some shit happened trying to authenticate with dropbox");
console.log(error);
return;
}
client.writeFile("test.txt", "sometext", function (error, stat) {
if (error) {
console.log(error);
return;
}
console.log("file saved!");
console.log(stat);
});
});

Answer 1

Took me a bit of testing, but it's possible.
First, you need to authenticate through the browser and save the token and token secret that are returned by Dropbox:
dbClient.authenticate(function(error, client) {
console.log('connected...');
console.log('token ', client.oauth.token); // THE_TOKEN
console.log('secret', client.oauth.tokenSecret); // THE_TOKEN_SECRET
...
});
Once you have the token and the secret, you can use them in the Dropbox.Client constructor:
var dbClient = new Dropbox.Client({
key : DROPBOX_APP_KEY,
secret : DROPBOX_APP_SECRET,
sandbox : false,
token : THE_TOKEN,
tokenSecret : THE_TOKEN_SECRET
});
After that, you won't get bothered with having to authenticate through a browser anymore (or at least not until someone runs the code again without the token and the secret, which will make Dropbox generate a new token/secret pair and invalidate the old ones, or the apps credentials are revoked).

Answer 2

Or you can just use the Implicit grant and get the oauth token.
var client = new Dropbox.Client({
key: "xxxxx",
secret: "xxxxx",
token:"asssdsadadsadasdasdasdasdaddadadadsdsa", //got from implicit grant
sandbox:false
});
No need to get to the browser at all.This line is no longer required!
client.authDriver(new Dropbox.AuthDriver.NodeServer(8191));