daniel.haxx.se
daniel.haxx.se
Daniel Stenberg
I’m Daniel Stenberg, an internet protocol geek and developer of network related open source projects. I live and work in Sweden. daniel.haxx.se is my site and I post what I feel like.
Latest Posts
As I have been preparing slides for my coming talk at foss-north on April 28, 2026 I figured I could take the opportunity and share a glimpse of the current reality here on my blog. The high quality chaos era, as I call it. No more AI...
Software and digital security should rely on verification, rather than trust. I want to strongly encourage more users and consumers of software to verify curl. And ideally require that you could do at least this level of verification of...
My email address is spelled out in the curl license The curl license appears in many products Some people have problems with their products and need someone to email A few of these discover my email in their product Occasionally, the...
The NTLM authentication method was always a beast. It is a proprietary protocol designed by Microsoft which was reverse engineered a long time ago. That effort resulted in the online documentation that I based the curl implementation on...
In May 2010 we merged support for the RTMP protocol suite into curl, in our desire to support the world’s internet transfer protocols. RTMP The protocol is an example of the spirit of an earlier web: back when we still thought we would...
In the spring of 2020 I decided to finally do something about the lack of visualizations for how the curl project is performing, development wise. How does the line of code growth look like? How many command line options have we had over...
Background: nuget.org is a Microsoft owned and run service that allows users to package software and upload it to nuget so that other users can download it. It is targeted for .Net developers but there is really no filter in what you can...
Release presentation Numbers the 273rd release8 changes63 days (total: 10,712)264 bugfixes (total: 13,640)538 commits (total: 38,024)0 new public libcurl function (total: 100)0 new curl_easy_setopt() option (total: 308)0 new curl command...
curl and libcurl are written in C. Rather low level components present in many software systems. They are typically not part of any ecosystem at all. They’re just a tool and a library. In lots of places on the web when you mention an...
The Linux Foundation, the organization that we want to love but that so often makes that a hard bargain, has created something they call “Insights” where they gather lots of metrics on Open Source projects. I held back so I never blogged...
The annual curl users and developers meeting, curl up, takes place May 23-24 2026 in Prague, Czechia. We are in fact returning to the same city and the exact same venue as in 2025. We liked it so much! curl up This is a cozy and friendly...
tldr: curl goes back to Hackerone. When we announced the end of the curl bug-bounty at the end of January 2026, we simultaneously moved over and started accepting curl security reports on GitHub instead of its previous platform. This...
Last spring I wrote a blog post about our ongoing work in the background to gradually simplify the curl source code over time. This is a follow-up: a status update of what we have done since then and what comes next. In May 2025 I had...
The title of my ending keynote at FOSDEM February 1, 2026. As the last talk of the conference, at 17:00 on the Sunday lots of people had already left, and presumably a lot of the remaining people were quite tired and ready to call it a...
In January 2025 I received the European Open Source Achievement Award. The physical manifestation of that prize was a trophy made of translucent acrylic (or something similar). The blog post I above has a short video where I show it off....