https://www.guido-flohr.net/ Tue, 02 Jun 2026 17:07:24 +0000 Tue, 02 Jun 2026 17:07:24 +0000 Qgoda vv0.11.0 (https://www.qgoda.net/) I currently work on a web application that allows users to supply a link to their homepage. Such links have to be validated client-side with JavaScript (actually Typescript/Angular) and with Perl on the server-side. But what should be accepted as a valid homepage link? And what is the right approach to analyze the provided URLs? Fri, 10 Jan 2020 22:00:00 +0000 https://www.guido-flohr.net/the-gory-details-of-url-validation/index.html https://www.guido-flohr.net/the-gory-details-of-url-validation/index.html Web Development Development System Administration Development After waiting years on my TODO list I recently decided to tackle the project "web site". Since I no longer work for Imperia I was looking for a light-weight alternative. I did not want to install PHP on my server, ruling out a lot of options. A colleague finally recommended Jekyll. Its simple semi-static approach reminded me of Imperia and I decided to give it a shot. Fri, 26 Feb 2016 22:00:00 +0000 https://www.guido-flohr.net/multilang-with-jekyll/index.html https://www.guido-flohr.net/multilang-with-jekyll/index.html Web Development CMS I18N Static Site Generators System Administration Development Jekyll Multi-Language System Administration Development Content negotiation is a key concept for multi language web sites. For Nginx it is only available as a patch. But negotiating the language is a rather trivial task for most sites. Instead of patching the web server, a couple of lines of Perl code will also do the job. Sun, 28 Feb 2016 22:00:00 +0000 https://www.guido-flohr.net/simple-content-negotiation-for-nginx/index.html https://www.guido-flohr.net/simple-content-negotiation-for-nginx/index.html System Administration Web Development Nginx Perl System Administration Development The access control system of Nginx lacks an equivalent for Apache's group based access control. But it is easy to emulate this Apache feature with a little bit of scripting. Tue, 13 Sep 2016 21:00:00 +0000 https://www.guido-flohr.net/group-authentication-for-nginx/index.html https://www.guido-flohr.net/group-authentication-for-nginx/index.html System Administration Web Development Nginx Perl System Administration Development