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ASP.NET Core Middleware

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Introduction This post is another of those "back to basics", still, there was one thing or two that I feel were not properly discussed elsewhere, hence this post. The ASP.NET Core Pipeline and Middleware You may know that ASP.NET Core defines a pipeline. This is where the incoming requests are processed and the response submitted. Each component in the pipeline - a middleware - can do things with the message (the request), such as check if it is authenticated and have rights to access the requested resource, turn the request into an MVC-style controller and action invocation, log it, and what not. You can read more about it here . The ASP.NET Core pipeline, from Microsoft The order by which the middleware is added to the pipeline matters. For example, the authorisation middleware must come after the authentication one, static files must come before routing, and exception handling must come before everything. The middleware order, from Microsoft A middleware is just a piece of...
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.NET Cancellation Tokens

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Audit Trails in EF Core

Introduction Audit trails is a common feature in database systems. Essentially, it's about knowing, for every table (or some selected ones), who created/updated each record, and when the creates/updates happened. It can also be useful to store the previous values too. Some regulations, such as SOX , require this for compliance. There are some libraries that can do this automatically in EF Core , and there's also the Change Data Capture in SQL Server (and possibly other databases too), of which I wrote about some time ago, but, hey, I wanted to write my own, so here is EFAuditable , my library for doing audit trails in EF Core. This one is designed with some extensibility in mind, so, please, read on. Scenarios EFAuditable  allows the following scenarios: Entities marked for auditing will have the audit columns added and persisted automatically to the database, on the same table Entities marked for history keeping will have their old values (in the case of updates or deletes) ...
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