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
I had the honor and pleasure to hand over this prize to its first real laureate during the award gala on Thursday evening in Brussels, Belgium. This annual award ceremony is one of the primary missions for the European Open Source...
We are doing another curl + distro online meeting this spring in what now has become an established annual tradition. A two-hour discussion, meeting, workshop for curl developers and curl distro maintainers. 2026 curl distro meeting...
We introduced curl’s -J option, also known as --remote-header-name back in February 2010. A decent amount of years ago. The option is used in combination with -O (--remote-name) when downloading data from a HTTP(S) server and instructs...
tldr: an attempt to reduce the terror reporting. There is no longer a curl bug-bounty program. It officially stops on January 31, 2026. After having had a few half-baked previous takes, in April 2019 we kicked off the first real curl...
One of the trickier things in software is gradual degradation. Development that happens in the wrong direction slowly over time which never triggers any alarms or upset users. Then one day you suddenly take a closer look at it and you...
Back in 2020 we added MQTT support to curl. When curl 8.19.0 ships in the beginning of March 2026, we have also added MQTTS; meaning MQTT done securely over TLS. This bumps the number of supported transfer protocols to 29 not too long...
Some of you may of course think what, only 20,000 commits after almost thirty years in the project, what kind of slacker is that guy? But yes, today I merged my 20,000th commit into the curl repository – out of a total of 37,604 commits...
In the curl project we have a long tradition of offering multiple optional backends for specific protocols. In this spirit we have added experimental support for a number of different HTTP/3 + QUIC backends over time. A while ago we...
Download curl from curl.se! Release presentation Numbers the 272nd release5 changes63 days (total: 10,155)391 bugfixes (total: 13,376)758 commits (total: 37,486)0 new public libcurl function (total: 100)0 new curl_easy_setopt() option...
I am heading to FOSDEM again at the end of January. I go there every year and I have learned that there is a really sticker-happy audience there. The last few times I have been there, I have given away several thousands of curl stickers....
Some time ago I mentioned that we went through the curl source code and eventually got rid of all strncpy() calls. strncpy() is a weird function with a crappy API. It might not null terminate the destination and it pads the target buffer...
Let’s take a look back and remember some of what this year brought. commits At more than 3,400 commits we did 40% more commits in curl this year than any single previous year! Since at some point during 2025, all the other authors in the...
The curl project moved over its source code hosting to GitHub in March 2010, but we kept the main bug tracker running like before – on Sourceforge. It took us a few years, but in 2015 we finally ditched the Sourceforge version fully. We...
In the standard libc API set there are multiple functions provided that do ASCII numbers to integer conversions. They are handy and easy to use, but also error-prone and quite lenient in what they accept and silently just swallow. atoi...
Download curl from curl.se. Release presentation As per tradition, there will be a live-streamed release presentation on twitch at 09:00 UTC (10:00 CET) on the release day. Available on YouTube after the fact. Numbers the 271st release11...