Recently I have been working on a project with a need for a scalable and resilient Varnish cluster. The interesting thing about such a project is the use of Kubernetes as a platform for our application stack. …

KubeCon 2019 has just ended. It has been a huge event that gathered thousands of people and hundreds of sponsors. It was problematic to choose which sessions I wanted to go because of their enormous amount. During the KubeCon I have learned many tools, paradigms, concepts, and ideas that can…

Once I was working on the cybersecurity project that involved installing the security sensors behind the corporate firewall. These security sensors should communicate to the central endpoint in the cloud and receive commands about software updates using Ansible scripts. The alternative Maybe now the solution would be in using SALTSTACK, but at…

Validation is needed to make sure that the content of a struct or a type is in the format you require. In the case of user registration, you may want to check that email is valid and password is strong. …

Before I started writing this blog post, I had been trying to find a good example for my task using these search queries: “infinite queue in Golang”, “endless generator in Go”, “Go job scheduler” but nothing useful came up, so I decided to develop my own approach. Problem In my task…

I was surprised there is no documentation on how to create custom JSON callback/route/endpoint in WordPress. There is a way to do it using REST API, but it requires an authentication to view REST endpoint. I was trying to do something easier and simpler and to allow anyone in the web to view this endpoint. Here is a solution. And here is a demo of how it works. As you can see from this picture, json-callback outputs GET parameters in the JSON format.

With a recent iOS upgrade to version 12, I’ve noticed that Apple changed the algorithm of how songs are shuffled. …

In the previous blog post, Paying less for more in Drupal Commerce through the Authorize.Net SIM/DPM, I described the vulnerability found in the Drupal Commerce Authnet SIM/DPM module. This time I decided to look into other eCommerce platforms and to find similar vulnerabilities. I’ve picked the WooCommerce, an eCommerce plugin…

While there are some bugs in Authorize.net plugins for Drupal Commerce and Wordpress WooCommerce, Authorize.net SIM/DPM does not provide sufficient security protection. In this post I am going to show the weakest point of Authorize.net SIM/DPM process. You can easily complete multiple orders, but pay off only a single one…