Blouppy

Articles on software engineering. Architecture, security, testing, back end and front end.

Read the articlesAbout

Latest article

Architecture

The Strategy pattern in C#: pick an implementation by key with dependency injection

The usual shape of the Strategy pattern in .NET: one class per variant, a discriminant, IEnumerable injection, what to do when no strategy matches, and keyed services.

3 min read

Recent articles

All articles
Architecture

The Strategy pattern in C#: every strategy runs, one per field of an issue

A less usual shape of the Strategy pattern in C#: an issue activity log where one strategy per field runs on every change, selected by generic type rather than by key.

3 min read

Front end

Replacing Disqus with Giscus

Move a blog's comments from Disqus to Giscus and GitHub Discussions: why, the setup, a React component that loads on demand and follows the site's theme, the Content Security Policy and a test.

4 min read

Security

Cookie consent on a static blog

Measure the cookies a static site really sets, see what the rules ask of a blog, and load Google Analytics only after consent, with a small store, a fair banner and tests that check it.

7 min read

Security

A Content Security Policy for an Astro site

Add a Content Security Policy to a static Astro site with security.csp: hashed inline scripts, third parties, why strict-dynamic broke the islands, and tests that fail on any violation.

5 min read

Front end

Tailwind CSS 3 to 4: what the upgrade tool does not catch

Twelve differences found by comparing a site pixel by pixel before and after moving to Tailwind CSS 4: borders, line heights, cascade layers, table cells, stacking, colours.

6 min read

Testing

Moving a blog from Gatsby to Astro without a regression

How this blog moved from Gatsby to Astro with the same URLs, HTML and behaviour, and how we proved it: an HTML oracle, pixel diffs and interaction tests on both builds.

6 min read

Browse by topic

Browse all 76 articles