Anonymous User Embedding

/*
  Required modules for cryptography, URL parsing, and HTTP requests.
  Make sure you have 'express' installed: npm install express
*/
const crypto = require('crypto');
const https = require('https');
const http = require('http');
const url = require('url');

app.post('/tokenGeneration', function (req, res) {
   
    var serverUrl = "<Bold BI server URL>";
    var siteIdentifier = "<Bold BI server Site Identifier>";
    var dashboardId = "<Dashboard Id>";
    var embedSecret = "<Embed Secret key>";

    var useremail = "<Anonymous user Email>";
    var groupName = "<Group Name>";

    // Making the BoldBI server API endpoint.
    var serverApiUrl = serverUrl + "/api/" + siteIdentifier;

   // Making the query string with nonce, dashboard ID and user email.
    var queryString = "embed_nonce=" + crypto.randomUUID();
    queryString += "&embed_dashboard_id=" + dashboardId;
    
    // Append anonymous user details and authorized group name to the query string
    queryString += "&embed_anonymous_token=true" // This property is for anonymous embedding.
    queryString += "&embed_authorize_group=" + groupName;
    queryString += "&embed_user_email=" + useremail;
    
    // Sign query string
    let embedSignature = "&embed_signature=" + GetSignatureUrl(queryString,embedSecret);
    var embedDetailsUrl = "/embed/authorize?" + queryString + embedSignature;

   // Request anonymous token from Bold BI server.
   var serverProtocol = url.parse(serverApiUrl).protocol == 'https:' ? https : http;
   serverProtocol.get(serverApiUrl + embedDetailsUrl, function (resultContent) {
    let str = '';
    resultContent.on('data', function (chunk) {
        str += chunk;
    });
    resultContent.on('end', function () {
            const resultJson = JSON.parse(str);
            // Check if the response is valid and contains the access token.
            if (resultJson && resultJson.ApiStatus && resultJson.Data && resultJson.Data.access_token) {
                res.json({ access_token: resultJson.Data.access_token });
            }
        });
    });

})

  // Helper function: Sign query string using embedSecret

  function GetSignatureUrl(queryString,embedSecret)
  {
    var keyBytes = Buffer.from(embedSecret);
    var hmac = crypto.createHmac('sha256', keyBytes);
    data = hmac.update(queryString);
    gen_hmac= data.digest().toString('base64');

   return gen_hmac;
  }

    <div id="dashboard_container_id"></div>
    <script>
        var boldbiEmbedInstance = BoldBI.create({
            serverUrl: "<Bold BI Server URL>",
            dashboardId: "<Dashboard Id>",
            embedContainerId: "<Embed Container Id>", // Div ID where dashboard will render
            embedToken: "<Embed token generated from backend server>"
        });
        boldbiEmbedInstance.loadDashboard();  
    </script>