Most REST API bugs are mundane. A mobile app on a weak connection retries a POST, and the customer ends up with two orders. An endpoint returns 200 OK with “success”: false in the body, so every client has to parse a message string to learn that something failed. Someone renames a JSON field on …
Asp.Net Core
ASP.NET Core Best Practices: A Performance Quick Reference
ASP.NET Core is fast by default, and most of the slowdowns in real apps trace back to a handful of habits: blocking on async code, loading too much data in one go, and putting heavy work on code that runs for every request. This post collects those ASP.NET Core best practices in one place, along …
SP.NET Core, React and Database Security Best Practices
This is the security checklist I go through on the stacks I’ve used most as a developer: ASP.NET Core and .NET, REST APIs, React and npm, and SQL and NoSQL databases. Each section is short enough to skim before a release or a code review. Where the right setting isn’t obvious, there’s a small code …
Integration Test In Asp.Net Core 6 Using SqlServer Image and TestContainers
This post is about writing integration tests and TestContainers. As you might know writing integration tests against the in-memory provider is a bad practice. Because it only works well with trivial solutions. Mostly because the in-memory API of IQueryProvider doesn’t match the LINQ query provider. Here’s a good article called “Avoid In-Memory Databases for Tests” …
How to mock APIs with Binary Responses using Postman Mock Server
There are different solutions for mocking an API endpoint. Such as using Microsoft Flow or doing it manually on a sever. But Postman mock servers can be a better fit if you already use Postman for your API development. Also, the initial use of their mock server is free with some limitations which I’m going …
Using IHttpClientFactory with Asp.Net MVC 5
Recently in my company we wanted to use IHttpClientFactory with our web app. But the problem was IHttpClientFactory was originally meant to be used with Asp.Net Core and not MVC 5. So I had to find a workaround that to be able to use it with older MVC applications. So in this post I’m going …
Upgrade to Asp.Net Core From Asp.Net MVC 5
I’m working on a project written with Asp.Net MVC 5 were I work. We intend first upgrade our class libraries to .Net Standard as much as we can. Then we make the move to Asp.Net Core. But since we have many class libraries, I’ve decide to first do a little search about what is the …
.Net Core 3 New Json API And Its Features
Until the release of .Net Core 3, the Asp.Net Core was dependent on Json.NET for its serialization. But with release of .Net Core 3, this dependency is removed and a new API is created. Not only there is no dependency on Json.Net in .Net Core 3 but also this new API is much faster than …
Dependency Injection: Conditional Resolving of Multiple Implementation of Interface
Sometimes we need to resolve a dependency but not with one implementation, but with multiple. There are couple of scenarios that calls for conditional resolving of types. Such as when using a generic class and methods with a dependency on another class. Now imagine the aforementioned class is an abstract one, and we need to …
Build UI Tree With Recursive Asp.Net Core View Component
Previous version of Asp.Net MVC had the concept of local view helpers that could contain HTML too. You see an example of this here. But this feature is removed in Asp.Net Core, but we have a better tool to do it. There might be a lot of other replacement solution for using @helper, but in …