@prologic@twtxt.net, there is a parser bug on parent. Specifically on this portion:

"*If twtxt/Yarn was to grow bigger, then this would become a concern again. *But even Mastodon allows editing*, so how
+much of a problem can it really be? 😅*"

@quark@ferengi.one I don’t really mind if the twt gets edited before I even fetch it. I think it’s the idea of my computer discarding old versions it’s fetched, especially if it’s shown them to me, that bugs me.

But I do like @movq@www.uninformativ.de’s suggestion on this thread that feeds could contain both the original and the edited twt. I guess it would be up to the author.

@prologic@twtxt.net I wouldn’t want my client to honour delete requests. I like my computer’s memory to be better than mine, not worse, so it would bug me if I remember seeing something and my computer can’t find it.

@prologic@twtxt.net I believe you are not seeing the problem I am describing.

Hit this URL in your web browser:

https://twtxt.net/external?nick=lovetocode999&uri=https://socialmphl.com/story19510368/doujin

That’s your pod. I assume you don’t have a user named lovetocode999 on your pod. Yet that URL returns HTTP status 200, and generates HTML, complete with a link to https://socialmphl.com/story19510368/doujin, which is not a twtxt feed (that’s where the twtxt.txt link goes if you click it). That link could be to anything, including porn, criminal stuff, etc, and it will appear to be coming from your twtxt.net domain.

What I am saying is that this is a bug. If there is no user lovetocode999 on the pod, hitting this URL should not return HTTP 200 status, and it should definitely not be generating valid HTML with links in it.

Edit: Oops, I misunderstood the purpose of this /external endpoint. Still, since the uri is not a yarn pod, let alone one with a user named lovetocode999 on it, I stand by the belief that URLs like this should be be generating valid HTML with links to unknown sites. Shouldn’t it be possible to construct a valid target URL from the nick and uri instead of using the pod’s /external endpoint?

There is a bug in yarnd that’s been around for awhile and is still present in the current version I’m running that lets a person hit a constructed URL like

YOUR_POD/external?nick=lovetocode999&uri=https://socialmphl.com/story19510368/doujin

and see a legitimate-looking page on YOUR_POD, with an HTTP code 200 (success). From that fake page you can even follow an external feed. Try it yourself, replacing “YOUR_POD” with the URL of any yarnd pod you know. Try following the feed.

I think URLs like this should return errors. They should not render HTML, nor produce legitimate-looking pages. This mechanism is ripe for DDoS attacks. My pod gets roughly 70,000 hits per day to URLs like this. Many are porn or other types of content I do not want. At this point, if it’s not fixed soon I am going to have to shut down my pod. @prologic@twtxt.net please have a look.

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@prologic@twtxt.net Try hitting this URL:

https://twtxt.net/external?nick=nosuchuser&uri=https://foo.com

Change nosuchuser to any phrase at all.

If you hit https://twtxt.net/external?nick=nosuchuser , you’re given an error. If you hit that URL above with the uri parameter, you can a legitimate-looking page. I think that is a bug.

@prologic@twtxt.net Sure, but why would this start happening all of a sudden today? Nothing like this has happened before. Is this a known bug?

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@bender@twtxt.net bug? @prologic@twtxt.net

@mckinley@twtxt.net weird you mentioned my with the anthony.buc.ci account. I am assuming these kind of bugs were never addressed by @prologic@twtxt.net. :-(

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i am wondering if maybe i need a better heap like a btree backed one instead of just list sort on Dequeue.

I found a bug where i didnt include an open/closed list that seemed to shave off a little. right now it runs in about 70 seconds on my machine.. it takes over the 300s limit when it runs on the testrunner on the same box.. docker must be restricting resources for it.

I might come back to it after i work through improving my code for day 23. Its similar but looking for the longest path instead of shortest.

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@lyse@lyse.isobeef.org I wish more standardization around distributed issues and PRs within the repo ala git-bug was around for this. I see it has added some bridge tooling now.

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@New_scientist@feeds.twtxt.net hello @prologic@twtxt.net here’s another feed that’s spewing multiple copies of the same post. This one above is repeated 8 times. @awesome-scala-weekly@feeds.twtxt.net now has 13 copies of each post every week. This definitely looks like a bug in whatever code is generating these feeds, because the source feeds don’t have multiple copies of the original posts:

• Has 8 copies of the above post: https://feeds.twtxt.net/New_scientist/twtxt.txt
  
• Has only 1 copy of the above post: https://www.newscientist.com/feed/home/
  

I forget whether I filed an issue on this before, but can you tell me where I should do that?

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Ah git-bug! Ive chatted with the creator when he was working on the graphql parts. Its working with git objects directly sorta like how git-repo does code reviews. Its a pretty neat idea for storing data along side the branches. I believe they don’t add a disconnected branch to avoid data getting corrupted by merging branches or something like that.

I have found the issue with this very subtle bug.. the cache was returning a slice that would be mutated. The mutation involved appending an item and then sorting. because the returned slice is just a pointer+length the sort would modify the same memory.

          CACHE         Returned slice          
original: [A B C D]     [A B C D]
add:      [A B C D] E   [A B C D E]
sort:     [E A B C] D   [A B C D E]

fix found here:
https://git.mills.io/yarnsocial/yarn/pulls/1072

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Oof! I found a bug on Yarn’s Markdown rendering, @prologic@twtxt.net. See OP.

@quark@ferengi.one Pinging @movq@www.uninformativ.de, in case it is a bug.

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It did! And I fixed the bug last night. And now I’m curious how your pod deals with spam. 👆🏼

My kid just uncovered a bug in a program I wrote by grabbing my laptop and smacking the keyboard a bunch. Biological input fuzzing; a real-life chaos monkey.

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Fixed another bug in my finger client: rfc1288 says lines have to end with crlf, but I was just sending lf.

Fixed a bug. Found a new bug in yesterday’s work. Fixed that bug.

@prologic@twtxt.net @jlj@twt.nfld.uk @movq@www.uninformativ.de

 /p/tmp > git clone https://www.uninformativ.de/git/lariza.git                                                                                                    Mon May 24 23:48:18 2021
Cloning into 'lariza'...
 /p/tmp > tree lariza/                                                                                                                                    12.5s  Mon May 24 23:48:32 2021
lariza/
├── BUGS
├── CHANGES
├── LICENSE
├── Makefile
├── PATCHES
├── README
├── browser.c
├── man1
│   ├── lariza.1
│   └── lariza.usage.1
├── user-scripts
│   └── hints.js
└── we_adblock.c

2 directories, 11 files