gistfile1.js

'use strict';
var fs = require('fs'),
    request = require('request'),
    crypto = require('crypto'),
    filePath = __dirname + '/frontend-src/po/translation-blueprints.pot',
    translationBlueprints = fs.readFileSync(filePath),
    hash = crypto.createHash('md5').update(translationBlueprints).digest('hex'),
    url = 'http://translations.fronter.net/zanata/rest/file/source/login-service/master?docId=translation-blueprints',
    formData = {
        hash: hash,
        first: 'true',
        last: 'true',
        type: 'pot',
        file: translationBlueprints
    },
    headers = {
        'X-Auth-User': 'kgr',
        'X-Auth-Token': '12345678901234567890123456789012'
    };

request.post({
    url:url,
    formData: formData,
    headers: headers
}, function optionalCallback(err, httpResponse, body) {
    if (err) {
        return console.error('upload failed:', err);
    }
    console.log("httpResponse.statusCode:", httpResponse.statusCode);
    console.log('Upload successful!  Server responded with:', body);
});

Hi Karl,
Saw your question in https://gitter.im/zanata/zanata. I've replied in https://gitter.im/zanata/zanata but you can also email us @ zanata-users@redhat.com.