Middleware

- Built-in middlewares
	- ASP.NET Core ships with built-in middlewares
	- Refer here for middleware sequence - https://learn.microsoft.com/en-us/aspnet/core/fundamentals/middleware/?view=aspnetcore-8.0

- Custom middlewares
	- We can create our own custom middlewares

- 3 main methods to execute middleware
	- Use
	- Run
	- Map
- Use
    - Purpose: Used to add middleware components to the pipeline.
	    - Usage: Sequentially adds middleware components to the pipeline.
	    - Example:
    
            app.UseMiddleware1();
            app.UseMiddleware2();
            app.UseMiddlewareN();
    
        - Behavior: Calls the next middleware in the pipeline by invoking the next delegate.
- Map:
- Purpose: Defines a branch of the pipeline based on the request path.
    - Usage: Allows you to create separate middleware pipelines for different URL paths.
    - Example:

        app.Map("/path1", branch =>
        {
            // Middleware for /path1
        });

        app.Map("/path2", branch =>
        {
            // Middleware for /path2
        });
        
        - Behavior: Branches the pipeline based on the specified path. The branch that matches the request path will be executed.
- Run:

- Purpose: Used to terminate the pipeline for a specific branch based on a condition.
- Usage: Typically used for short-circuiting the pipeline when no further middleware processing is required in that branch.
- Example:

    app.Run(context =>
    {
        // Your logic to terminate the request
    });
    
- Behavior: Does not call the next middleware in the pipeline. It's a way to terminate the request processing for a specific branch.
- In summary, 
    - Use is for adding middleware components
    - Map is for branching the pipeline based on request paths
    - Run is for terminating the pipeline for a specific branch. 

- Depending on your application's requirements, you may use a combination of these methods to construct a middleware pipeline that suits your needs.

- Routes
	- /short-circuit
	- /use-when
	- /map
	- /map-when
    - /ok
    - /internal-server-error