Using Azure Notification Hub REST from Bruno

Task

Having migrated away from rather bloated Postman to using Bruno, I needed to make REST API calls to Azure Notification Hub. It requires specific Authentication heared and you need to build it in a Pre Request Script.

Solution

Here's the script. Use Header: Authorization with value {{azure-authorization}}. Enjoy!

const CryptoJS = require('crypto-js');

function getAuthHeader(targetUri, ruleId, sharedKey,

expiresInMins) {

targetUri = encodeURIComponent(targetUri.toLowerCase()).toLowerCase();

// Set expiration in seconds

var expireOnDate = new Date();

expireOnDate.setMinutes(expireOnDate.getMinutes() + expiresInMins);

var expires = Date.UTC(expireOnDate.getUTCFullYear(), expireOnDate

.getUTCMonth(), expireOnDate.getUTCDate(), expireOnDate

.getUTCHours(), expireOnDate.getUTCMinutes(), expireOnDate

.getUTCSeconds()) / 1000;

var tosign = targetUri + '\n' + expires;

// using CryptoJS

var signature = CryptoJS.HmacSHA256(tosign, sharedKey);

var base64signature = signature.toString(CryptoJS.enc.Base64);

var base64UriEncoded = encodeURIComponent(base64signature);

// construct autorization string

var token = "SharedAccessSignature sr=" + targetUri + "&sig="

+ base64UriEncoded + "&se=" + expires + "&skn=" + ruleId;

//console.log("signature:" + token);

return token;

}

const baseUrl = bru.getFolderVar('url');

const currentTemplateUrl = req.getUrl();

// Replace the template with the real value

const resolvedUrl = currentTemplateUrl.replace("{{url}}", baseUrl);

bru.setVar('azure-authorization', getAuthHeader(resolvedUrl, "<<SharedAccessKeyName>>", "<<SharedAccessKey>>", 1));

bru.setVar('current-date',new Date().toUTCString());