My GPX-Viewer had a problem in Firefox: For some visitors OpenStreeMap maps would be displayed with pink tiles and not the real map tiles. This is a known problem which occurs when the server being used to load the tiles does not send an appriopriate HTTP header for CORS.
At the beginning of this week my server became a target for a DDoS attack which eventually caused a massive overload. Therefore all websites on the machine where temporary not avaible any longer. The goal of this attack was obviously an attempt to exploit the pingback vulnerabilty of WordPress which already had been reported in March.
Update 2014-08-07: In fact it’s more likely that a problem in PHP in the context of XML had been exploited, also see this post about the details.
Since a while Google Maps also offers a 3D view in modern browsers which support WebGL – similar to the way it is possible with the separate application „Google Earth“. For this you just have to click the “Earth” symbol in the lower left corner of the map view:
If you are not sure if your browser generally supports WebGL you may first try my little example for WebGL.
The Multicolumn Category Widget had been extended by an additional option which allows to display the number of posts behind the category names.
Recently I addressed the topic „WebSockets“ and as an exercise I created a little experiment: A simple chat.
If you like to, you may check this out at https://arnowelzel.de/tools/chat/. A requirement for this is a decent browser with support for SNI and WebSockets.
The widget to display categories in WordPress lists categories only in one column (as of version 3.8.1). However in many cases there would be enough room to split the list into two or more columns.
For this purpose I’ve created my first plugin for WordPress – “Multicolumn Category Widget”, a widget to display the top level categories in multiple columns.
In the occasion of the move to WordPress after about 8 years with DokuWiki a little retrospective about some stations of the development from 1997 to 2014…
Please note: I don’t use this plugin any longer and the changes described here are not used in the plugin any longer as well. Instead I now use Lightbox with PhotoSwipe which I developed as an alternative.
In the context of switching my website from DokuWiki to WordPress I did my first contribution to the code of the „Responsive Lightbox“: http://wordpress.org/plugins/responsive-lightbox/changelog/
As an example for the use of this plugin with my modifications, see “Back from Finland”.
The source of the Swipebox script is also available on Github (unfortunately the script wasn’t properly included in the Update 184.108.40.206 and 1.4.1 of “Responsive Lightbox” by dFactory – but this should be fixed soon).
Update 2014-03-20: dFactory did include the correct script in update 1.4.2.
Update 2015-11-15: Since a number of versions not my version of the script is being used any longer but the official variant which has some major changes.