(Node.js) How to Generate an Azure Service Bus Shared Access Signature (SAS)

Demonstrates generating and using an Azure Service Bus Shared Access Signature (SAS).

Note: This example requires Chilkat v9.5.0.65 or greater.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // Note: Requires Chilkat v9.5.0.65 or greater.

    // This requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // -------------------------------------------------------------------
    // Create a Shared Access Signature (SAS) token for Azure Service Bus.
    // -------------------------------------------------------------------

    var authSas = new chilkat.AuthAzureSAS();
    authSas.AccessKey = "AzureServiceBus_PrimaryKey";

    // The SAS token for Service Bus will look like this:
    // (The order of params will be different.  The order does not matter.)
    // sig=<signature-string>&se=<expiry>&skn=<keyName>&sr=<URL-encoded-resourceURI>

    // Specify the format of the string to sign.
    authSas.StringToSign = "resourceURI,expiry";

    // Create an expiry to 30 days in the future.
    var dtExpiry = new chilkat.CkDateTime();
    dtExpiry.SetFromCurrentSystemTime();
    dtExpiry.AddDays(30);
    authSas.SetTokenParam("expiry","se",dtExpiry.GetAsUnixTimeStr(true));

    // Set the skn (keyname)
    // This example uses the key "RootManageSharedAccessKey".  This give full access.
    // In a typical scenario, you would create a new Azure key (for the service bus)
    // in the Azure portal, such that the key has limited permissions.  This would
    // allow you to give the SAS token to others for specific access for some period of time.
    authSas.SetTokenParam("keyName","skn","RootManageSharedAccessKey");

    // Set the URL-encoded-resourceURI
    var sbResourceUri = new chilkat.StringBuilder();
    sbResourceUri.Append("https://<yournamespace>.servicebus.windows.net/");
    sbResourceUri.Encode("url","utf-8");
    authSas.SetTokenParam("resourceURI","sr",sbResourceUri.GetAsString());

    // Generate the SAS token.
    var sasToken = authSas.GenerateToken();
    if (authSas.LastMethodSuccess !== true) {
        console.log(authSas.LastErrorText);
        return;
    }

    console.log("SAS token: " + sasToken);

    // Save the SAS token to a file.
    // We can then use this pre-generated token for future Service Bus operations.
    var fac = new chilkat.FileAccess();
    fac.WriteEntireTextFile("qa_data/tokens/serviceBusSas.txt",sasToken,"utf-8",false);

}

chilkatExample();