DotNet Full Stack Dev

RabbitMQ is a robust message broker that enables communication between services in a decoupled, reliable manner. In this guide, we’ll implement RabbitMQ in a .NET Core application to connect two microservices: Shopping Cart API (Producer) and Order API (Consumer). 1. Prerequisites Install RabbitMQ locally or on a server. Default Management UI: http://localhost:15672 Default Credentials: guest/guest Install the RabbitMQ.Client package for .NET: dotnet add package RabbitMQ.Client 2. Architecture Overview Shopping Cart API (Producer): Sends a message when a user places an order. RabbitMQ : Acts as the broker to hold the message. Order API (Consumer): Receives the message and processes the order. 3. RabbitMQ Producer: Shopping Cart API Step 1: Install RabbitMQ.Client Ensure the RabbitMQ client library is installed: dotnet add package RabbitMQ.Client Step 2: Create the Producer Service Add a RabbitMQProducer class to send messages. RabbitMQProducer.cs : using RabbitMQ.Client; usin...

  API calls are the backbone of modern applications, and monitoring them is crucial for debugging, performance analysis, and error tracking. If you need to track your application’s API calls and identify where logging happens , this guide will show you how to implement effective tracking mechanisms, log strategically, and pinpoint issues in your application. Why Track API Calls and Logs? Debugging and Troubleshooting : Identify bottlenecks and failures in the API workflow. Performance Monitoring : Track response times and optimize slow endpoints. Compliance and Audit : Log API usage for compliance and security auditing. Behavior Analysis : Understand usage patterns and optimize frequently used APIs. Step 1: Add Middleware to Track API Calls In ASP.NET Core , middleware is a powerful way to intercept requests and responses. You can use custom middleware to log details about incoming API calls. Example: Logging Middleware Create a RequestLoggingMiddleware : public class RequestLog...

  Logging is a fundamental aspect of any software application, providing insights into application behavior, performance, and errors. In .NET Core, logging is built into the framework, making it easy to implement consistent and configurable logging across your application. In this blog, we'll explore how to implement logging in a .NET Core application using an Item API as an example. Why Logging is Important Debugging : Helps in tracing and diagnosing issues. Monitoring : Provides insights into application performance and user activities. Auditing : Keeps track of important events and changes in the application. Compliance : Assists in meeting regulatory requirements by maintaining records of critical operations. Overview of .NET Core Logging .NET Core includes a built-in logging framework that is both flexible and powerful. It supports logging to various outputs, including the console, files, and third-party systems like Azure Application Insights, Serilog, and more. Key features ...

  OpenID Connect (OIDC) is an identity layer built on top of OAuth2. While OAuth2 is primarily focused on authorization, OIDC provides authentication, allowing clients to verify the identity of a user. It's important to note that OIDC is inherently tied to OAuth2 as it uses OAuth2 for the authorization part of its flow. However, you can use OIDC specifically for authentication without focusing on the broader OAuth2 authorization scenarios. In this blog, we'll explore how to implement OIDC in a .NET Core application with an Item API, focusing on the authentication aspect. What is OpenID Connect (OIDC)? OpenID Connect is a simple identity layer on top of the OAuth2 protocol, which allows clients to verify the identity of the end-user based on the authentication performed by an authorization server. It also provides basic profile information about the user in the form of an ID token. Implementing OIDC in a .NET Core Application Let's walk through how to implement OpenID Connec...

  OAuth2 is widely used for authorization in web applications, allowing third-party services to access resources on behalf of a user without exposing their credentials. In this blog, we'll explore how to implement OAuth2 authentication in a .NET Core application, focusing on securing an Item API without using OpenID Connect (OIDC). What is OAuth2? OAuth2 is an open standard protocol for authorization, providing a secure way for users to grant third-party applications access to their resources without sharing their credentials. OAuth2 is commonly used for token-based authentication and access control. Why Use OAuth2 Without OIDC? While OpenID Connect (OIDC) is often used alongside OAuth2 to add user authentication and identity management, there are cases where you might want to use OAuth2 alone, such as when: You only need to authorize access to resources, not authenticate users. Your application doesn't require the identity information provided by OIDC. Implementing OAuth2 in a...

  Authentication is a critical part of modern web applications, and OAuth2 combined with OpenID Connect (OIDC) provides a robust and secure method for user authentication. In this blog, we'll explore how to implement OAuth2 and OIDC authentication in a .NET Core application, using an Item API as an example. What is OAuth2? OAuth2 is an open standard for access delegation, commonly used for token-based authentication. It allows third-party services to exchange credentials for access tokens, which can then be used to access protected resources on behalf of a user. What is OpenID Connect (OIDC)? OIDC is an identity layer built on top of OAuth2. It adds authentication by allowing clients to verify the identity of the user based on the authentication performed by an authorization server. OIDC also provides additional information about the user in the form of an ID token. Why Use OAuth2 and OIDC? Security : OAuth2 and OIDC provide secure mechanisms for authentication and authorization. S...

  Middleware in .NET Core is a crucial concept that plays a significant role in handling HTTP requests and responses within the application pipeline. It acts as a series of filters or components that process incoming requests and outgoing responses. In this blog, we'll dive into the concept of middleware, its role in a .NET Core application, and demonstrate how to create custom middleware using an Item API as an example. What is Middleware? Middleware is software that is assembled into an application pipeline to handle requests and responses. Each piece of middleware can perform operations before or after the next piece of middleware in the pipeline. This pipeline is set up in the Startup.cs file of a .NET Core application. Common Uses of Middleware Middleware can be used for a variety of tasks, such as: Request Logging : Logging details about incoming requests. Authentication : Verifying user credentials. Error Handling : Catching and handling exceptions. Routing : Determining th...

  Dependency Injection (DI) is a design pattern that allows for better separation of concerns, easier testing, and more maintainable code by injecting dependencies into classes rather than hard-coding them. .NET Core has built-in support for DI, making it an integral part of building scalable and flexible applications. In this blog, we'll explore DI in .NET Core using an Item API as an example. We'll walk through the process of setting up DI in a .NET Core application and demonstrate how it can be used to manage dependencies. What is Dependency Injection? Dependency Injection is a technique where an object receives other objects (dependencies) it needs, rather than creating them itself. This approach allows for better flexibility and easier testing, as dependencies can be swapped out or mocked as needed. In .NET Core, DI is supported natively and is typically configured in the Startup.cs file, where services are registered and managed by the built-in IoC (Inversion of Control)...