Sunday, 18. February 2024Week 7


Added and ads.txt file to the blog. The idea is to avoid that someone can sell fake advertisment space for this blog.

As I don't use any advertisment here the content of the file is pretty basic:



ldapauth is a Node.js script which I have been using for the last 12+ years mostly unchanged.

It started its life in a LXC container, eventually was moved to a Docker container and recently ended up in its own repository on GitHub.

The functionality it provides is not extraordinary, but helped to bridge a gap where no other product was available.
It talks LDAP one one side (although limited to handle user lookup requests) and on the other side connects to a MongoDB database where the information is stored.

It emerged out of the desire to have an easy way to manage individual user accounts for my home WiFi. I already had MongoDB running for some other personal project and simply added the list of users there (including the UI for managing them).
Thus the missing part was to get the WiFi accesspoint to lookup user accounts in MongoDB.

Of course WiFi accesspoints do not directly talk MongoDB, but rather some other protocol like RADIUS.
A freeradius server was quickly setup, but still couldn't talk to MongoDB at the time. Thus comes in ldapauth, which takes LDAP queries from freeradius and turns them into MongoDB lookups so that in the end the WiFi accesspoint receives the user accounts :-)

Not sure if this is particularly useful for anyone else, but at least here it did provide good services (and continues to do so).
Current score is that it has survived three different WiFi accesspoints and has been running on 5 different servers over the time.

Saturday, 3. February 2024Week 5


Some time ago I used an online tool to generate some QR codes with a contact URL so I can put them on my luggage.
Now I got a new bag and need a new QR code for it. As I don't remember the online tool I used years ago, I decided to write my own tool.

Thus say hello to qr-bag. It's a commandline tool written in Go to generate QR codes for URLs with a little logo in the middle.
The code for it is mostly a wrapper around the go-qrcode library which does all the heavy lifting.

Example QR code


Just discovered the text-decoration-color CSS property and added it to the style on the blog:

a:hover {color: #454545; text-decoration: underline; text-decoration-color: #26C4FF;}

This causes that when you hover over a link in a post, the underline is not in the same boring gray as the text but lights up in a nice color :-)

(not to be confused with the hacky colored underlines in the righthand navigation bar, where I use a colored border-bottom to achieve a similar effect since 2002)

Wednesday, 31. January 2024Week 5
Tuesday, 30. January 2024Week 5

Statistics revived

Following in the trend of replacing tables, I've revived the old statistics page.
Now using less markup as it is built with <div> and CSS only (the display: inline-block; property was particularly helpful).

(the Jekyll/Liquid templating to generate the data for it looks quite horrific though…)

Sunday, 28. January 2024Week 4

Tables are gone

Over the last couple weeks I slowly replaced the various <table>-based layout elements of the blog with more modern HTML elements.
And finally this afternoon the work was completed with the last <table> element gone.

Visually there should be almost no differences, but in case something looks strange just let me know :-)
(and yes, style-wise everything is still using the pixel-based layout from 2002, one day this might change as well…)

Saturday, 27. January 2024Week 4

Quick and dirty dark mode

To provide basic dark mode support for the blog, I added the following lines of CSS:

@media (prefers-color-scheme: dark) {
    html { filter: invert(1) hue-rotate(180deg); }
    img, video, iframe { filter: invert(1) hue-rotate(180deg); }

If the browser/OS has dark mode enabled it will invert the colors and rotate the hue to achieve the dark mode effect.
The whole operation is applied a second time on images, videos and frames to avoid that they have their colors distorted.

You can get a preview by using the developer tools of your browser to enable dark mode :-)

The code is inspired by the post here, and then extended to provide a CSS-only solution by leveraging the color-scheme CSS property.

Sunday, 21. January 2024Week 3