Show HN: I wrote an HN bot to suggest HTTPS url when people post HTTP URLs It's inspired by this comment I made: https://ift.tt/3dxKQhp. I actually saw several comments with HTTP URL posted, and that was the only one I bothered to comment on. So I thought that this is something better suited for bots than human. I hacked this together over yesterday and today: https://ift.tt/39E50Vx. Basically it uses the Firebase API (https://ift.tt/1s98Sn3) to find comments with HTTP URLs in them, try the HTTPS version, compare the contents, post back a comment if the contents are more than 95% similar. The "95% similar" part was actually the first part I wrote in the code. At first I tried a few existing go packages implementing diff/lcs, but most of them was quite slow and does a lot of allocations when I'm comparing two randomly generated 10KiB blobs, so I wrote my own (https://ift.tt/3dBlOh5), which is optimized for space (it does almost no allocations), and it's also faster because allocations are slow. (I know this is an unfair comparison that most of the existing implementations need to give you an output that can be used to reconstruct the two blobs back, so at least some of their allocations are required and unavoidable) I also wrote a bug that it would find the same HTTP url in every run and post the same comment over and over again. My apologize to dang or whoever dealt with it (or maybe the system is good enough that it blocked those repetitive comments automatically). In the end it successfully made 6 comments across ~4 hours (not including the repetitive ones). All of those comments are flagged (likely due to hn policy), https://ift.tt/3cRlkEJ is the only one that's still visible to other users at the time of writing, if you are curious. I just killed it completely from the request of dang. Although it only lived for a few hours, it's still a fun exercise. Maybe I'll convert it into a reddit bot next? Who knows. April 5, 2021 at 05:52AM
Show HN: Launch VM workloads securely and instantaneously, without VMs Hello HN! We've been working on a new hypervisor https://kwarantine.xyz that can run strongly isolated containers. This is still a WIP, but we wanted to give the community an idea about our approach, its benefits, and various use cases it unlocks. Today, VMs are used to host containers, and make up for the lack of strong security as well as kernel isolation in containers. This work adds this missing security piece in containers. We plan on launching a free private beta soon. Meanwhile, we'd deeply appreciate any feedback, and happy to answer any questions here or on our slack channel. Thanks! April 29, 2021 at 07:50AM
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