Niklas Tech Blog

Every now and then you are thrown into projects were you might not be the perfect pick from start. I seldom work with .NET and this project was just that 🙂 I was asked to create a small .NET proof-of-concept application in C# that fetches messages from a AMQP broker using mTLS authentication. I post the solution so it might benefit someone else (did not find much about this on Google)
Here is the result:

using Amqp;
using Amqp.Sasl;
using Microsoft.Extensions.Logging;


namespace DotNETApps
{
    class Program
    {
        static async Task Main(string[] args)
        {
            using var loggerFactory = LoggerFactory.Create(builder =>
            {
                builder
                    .AddConsole()
                    .SetMinimumLevel(LogLevel.Debug);
            });

            ILogger logger = loggerFactory.CreateLogger<Program>();

            logger.LogInformation("Application started.");

            Address address = new Address("amqps://mydomain:5671");

            var factory = new ConnectionFactory();
            factory.SSL.ClientCertificates.Add(new 
                  System.Security.Cryptography.X509Certificates
                         .X509Certificate2("c:\\myclientcert.pfx", "secret"));

            factory.SASL.Profile = SaslProfile.Anonymous;

            try {
                logger.LogInformation("Connecting to broker...");
                Connection connection = await factory.CreateAsync(address);
                logger.LogInformation("Connected to broker.");

                Session session = new Session(connection);
                ReceiverLink receiver = 
                         new ReceiverLink(session, "receiver-link", "MYQUEU");

                Console.WriteLine("Receiver connected to broker.");

                Message message = await Task.Run(() => 
                          receiver.Receive(TimeSpan.FromMilliseconds(2000)));

                if (message == null)
                {
                    Console.WriteLine("No message received.");
                    receiver.Close();
                    session.Close();
                    connection.Close();
                    return;
                }

                Console.WriteLine("Received " + message.Body);
                receiver.Accept(message);

                receiver.Close();
                session.Close();
                connection.Close();
            }
            catch (Exception e)
            {
                logger.LogError(e, "An error while processing messages.");
            }

            logger.LogInformation("Application ended.");
        }
    }
}

Tested on Windows 10, AMQPNETLite v2.4.11, .NET 8.0 and Visual Studio Code 1.97.0