What is middleware in .NET Core

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Middleware in .NET Core is a fundamental concept that plays a crucial role in request processing pipeline. Essentially, middleware are components that are added to the ASP.NET Core pipeline, allowing you to handle HTTP requests and responses. Middleware is executed in a sequence, where each component can perform specific tasks like authentication, logging, routing, error handling, and more. One of the primary benefits of using middleware in .NET Core is its flexibility and extensibility. You can create custom middleware to meet your specific requirements or leverage existing middleware provided by the framework or third-party libraries. This allows you to modularize and separate concerns in your application, making it more maintainable and scalable. Here's a simple example of middleware in .NET Core: public class CustomMiddleware { private readonly RequestDelegate _next; public CustomMiddleware(RequestDelegate next) { _next = next; } public async Task InvokeAsync(HttpContext context) { // Perform actions before the next middleware await _next(context); // Perform actions after the next middleware } } // In Startup.cs public void Configure(IApplicationBuilder app) { app.UseMiddleware (); // Other middleware configurations } In this example, `CustomMiddleware` is a custom middleware component that performs actions before and after passing the request to the next middleware in the pipeline. You can chain multiple middleware components together to build a processing pipeline tailored to your application's needs. Overall, middleware in .NET Core is a powerful concept that enables you to handle various aspects of request processing efficiently and effectively. Whether you're implementing cross-cutting concerns, modifying requests/responses, or adding new functionalities, middleware provides a robust mechanism to streamline your application logic.

What is middleware in .NET Core

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