Vuforia AddTarget

/**
 * Created by mbellocchi on 16/05/2017.
 */

var request = require('request');
var fs = require('fs');
var path = require('path');
var crypto = require('crypto');

var collectionPath = "../public/collections/56781ea712f7a8e414626754/";
var folderMetadata = "3D/representativeMetadata/";
var folderImgs = "3D/00001/";
var img = "22264330492_8396e58b54_720_26734084@N04";

// Set the headers

var server_secret_key = "my_server_secret_key"


const HTTPVerb = "POST";
const ContentType = "multipart/form-data";
const date = new Date();
const RequestPath = "https://vws.vuforia.com/targets";

var optionsOld = {
    url: RequestPath,
    method: 'POST',
    form: {
        "image": fs.createReadStream(path.join(__dirname, collectionPath + folderImgs + img + ".jpg")).toString('base64'),
        "name": img.split("@")[0],
        "width": 500.0,
        "application_metadata": fs.createReadStream(path.join(__dirname, collectionPath + folderMetadata + img.split("@")[0] + ".txt")).toString('base64')
    }
}

const ContentMD5 = crypto.createHash('md5').update(optionsOld.toString()).digest("hex");

const StringToSign =
    HTTPVerb + "\n" +
    ContentMD5 + "\n" +
    ContentType + "\n" +
    date + "\n" +
    RequestPath;


const hmac = crypto.createHmac('sha1', server_secret_key);
hmac.update(StringToSign);

//console.log(hmac.digest('hex'));
//console.log(hmac.digest('base64'));

var Signature = hmac.digest('base64');


var AuthorizationValue  = 'VWS '+ server_secret_key + ':' + Signature;

var headers = {
    'Content-Type':     'application/json',
    'Authorization':    AuthorizationValue
}

var options = {
    url: RequestPath,
    method: 'POST',
    headers: headers,
    form: {
        "image": fs.createReadStream(path.join(__dirname, collectionPath + folderImgs + img + ".jpg")).toString('base64'),
        "name": img.split("@")[0],
        "width": 500.0,
        "application_metadata": fs.createReadStream(path.join(__dirname, collectionPath + folderMetadata + img.split("@")[0] + ".txt")).toString('base64')
    }
}

console.log(AuthorizationValue);

// Configure the request

// Start the request
request(options, function (error, response, body) {
    console.log(response.statusCode);
    if (!error && response.statusCode == 200) {
        // Print out the response body
        console.log(body);
    } else {
        console.log("Error", error);
    }
});