Minimal Javascript code to upload a file using sftp. It requires ssh2

sftp-upload.js

var fs = require('fs'),
	client = require('ssh2').Client;

upoladFile({
	localFolder:  "",
	localFile:    "",
	remoteFolder: "",
	remoteFile:   "",
	host:         "",
	port:         0,
	username:     "",
	password:     ""
});

function upoladFile(p) {
	var conn = new client();
	conn.on('ready', function () {
		conn.sftp(function (err, sftp) {
			if (err) throw err;
			sftp.readdir(p.remoteFolder, function (err, list) {
				if (err) throw err;
				console.dir(list);
				var readStream = fs.createReadStream(p.localFolder + p.localFile);
				var writeStream = sftp.createWriteStream(p.remoteFolder + p.remoteFile, { mode: 0100664 });
				writeStream.on('close', function () {
					sftp.readdir(p.remoteFolder, function (err, list) {
						if (err) throw err;
						console.dir(list);
						conn.end();
					});
				});
				readStream.pipe(writeStream);
			});
		});
	}).connect({ host: p.host, port: p.port, username: p.username, password: p.password });
}