Today Microsoft Azure introduced the new F-series VM sizes (you can read about it here) and our software faced a bizarre issue. When we want to create a new instance in Azure, we have an implementation that chooses VM size based on some criteria. One of the criteria is the number of data disks we … Continue reading Why you shouldn’t trust the documentation ?
Author: Alexander Sirotin
If you're using bash, you probably know that pipes are really nice and helpful. Recently I wasted a lot of time trying to realize why one of our tests failed on data corruption (we are kind-of a storage company so this is bad) and the results were amusing (or sad, you can decide). The test … Continue reading Bash Tips & Tricks: Handling failures in pipe
There are many technologies that can be used for building back-ends for web-sites, web-services and etc. In this post, I want to show how easily web-services can be created using Python and Flask. I don't really like writing UI (or HTML) so I will avoid it by making the management of the urls database available using … Continue reading Building simple url-redirection service using Flask and Python
At the beginning of this month, the Mossad published a hacking challenge. out of curiosity I took some time playing with it and while progressing within the challenge I discovered a dll file which should contain a hint (admin password for a fake chat room). The interesting question is what do I do with it … Continue reading Hacking a DLL – Disassembly for beginners
Every good product need to have a good testing coverage in order to insure that it works both in "happy scenarios" and in "bad scenarios" - inc. disruptions, limits and etc. Beside unit tests, every module should be tested "end-to-end" as well. In this blog post I'll demonstrate how to build a simple testing framework … Continue reading Building simple testing framework in Python
Recently, I was participating in an online challenge that included "hacking" to a website that was especially created for the challenge. After figuring out what to do at the beginning, I came to the conclusion that I need to send a particular html form multiple times (over 30) while changing cookie value between the form … Continue reading Web Browser Automation using Selenium