@prologic@twtxt.net Thanks for writing that up!

I hope it can remain a living document (or sequence of draft revisions) for a good long time while we figure out how this stuff works in practice.

I am not sure how I feel about all this being done at once, vs. letting conventions arise.

For example, even today I could reply to twt abc1234 with “(#abc1234) Edit: …” and I think all you humans would understand it as an edit to (#abc1234). Maybe eventually it would become a common enough convention that clients would start to support it explicitly.

Similarly we could just start using 11-digit hashes. We should iron out whether it’s sha256 or whatever but there’s no need get all the other stuff right at the same time.

I have similar thoughts about how some users could try out location-based replies in a backward-compatible way (append the replyto: stuff after the legacy (#hash) style).

However I recognize that I’m not the one implementing this stuff, and it’s less work to just have everything determined up front.

Misc comments (I haven’t read the whole thing):

• Did you mean to make hashes hexadecimal? You lose 11 bits that way compared to base32. I’d suggest gaining 11 bits with base64 instead.

• “Clients MUST preserve the original hash” — do you mean they MUST preserve the original twt?

• Thanks for phrasing the bit about deletions so neutrally.

• I don’t like the MUST in “Clients MUST follow the chain of reply-to references…”. If someone writes a client as a 40-line shell script that requires the user to piece together the threading themselves, IMO we shouldn’t declare the client non-conforming just because they didn’t get to all the bells and whistles.

• Similarly I don’t like the MUST for user agents. For one thing, you might want to fetch a feed without revealing your identty. Also, it raises the bar for a minimal implementation (I’m again thinking again of the 40-line shell script).

• For “who follows” lists: why must the long, random tokens be only valid for a limited time? Do you have a scenario in mind where they could leak?

• Why can’t feeds be served over HTTP/1.0? Again, thinking about simple software. I recently tried implementing HTTP/1.1 and it wasn’t too bad, but 1.0 would have been slightly simpler.

• Why get into the nitty-gritty about caching headers? This seems like generic advice for HTTP servers and clients.

• I’m a little sad about other protocols being not recommended.

• I don’t know how I feel about including markdown. I don’t mind too much that yarn users emit twts full of markdown, but I’m more of a plain text kind of person. Also it adds to the length. I wonder if putting a separate document would make more sense; that would also help with the length.

@prologic@twtxt.net Do you have a link to some past discussion?

Would the GDPR would apply to a one-person client like jenny? I seriously hope not. If someone asks me to delete an email they sent me, I don’t think I have to honour that request, no matter how European they are.

I am really bothered by the idea that someone could force me to delete my private, personal record of my interactions with them. Would I have to delete my journal entries about them too if they asked?

Maybe a public-facing client like yarnd needs to consider this, but that also bothers me. I was actually thinking about making an Internet Archive style twtxt archiver, letting you explore past twts, including long-dead feeds, see edit histories, deleted twts, etc.

I wrote some code to try out non-hash reply subjects formatted as (replyto ), while keeping the ability to use the existing hash style.

I don’t think we need to decide all at once. If clients add support for a new method then people can use it if they like. The downside of course is that this costs developer time, so I decided to invest a few hours of my own time into a proof of concept.

With apologies to @movq@www.uninformativ.de for corrupting jenny’s beautiful code. I don’t write this expecting you to incorporate the patch, because it does complicate things and might not be a direction you want to go in. But if you like any part of this approach feel free to use bits of it; I release the patch under jenny’s current LICENCE.

Supporting both kinds of reply in jenny was complicated because each email can only have one Message-Id, and because it’s possible the target twt will not be seen until after the twt referencing it. The following patch uses an sqlite database to keep track of known (url, timestamp) pairs, as well as a separate table of (url, timestamp) pairs that haven’t been seen yet but are wanted. When one of those “wanted” twts is finally seen, the mail file gets rewritten to include the appropriate In-Reply-To header.

Patch based on jenny commit 73a5ea81.

https://www.falsifian.org/a/oDtr/patch0.txt

Not implemented:

• Composing twts using the (replyto …) format.
  
• Probably other important things I’m forgetting.

Regarding jenny development: There have been enough changes in the last few weeks, imo. I want to let things settle for a while (potential bugfixes aside) and then I’m going to cut a new release.

And I guess the release after that is going to include all the threading/hashing stuff – if we can decide on one of the proposals. 😂

@sorenpeter@darch.dk I like this idea. Just for fun, I’m using a variant in this twt. (Also because I’m curious how it non-hash subjects appear in jenny and yarn.)

URLs can contain commas so I suggest a different character to separate the url from the date. Is this twt I’ve used space (also after “replyto”, for symmetry).

I think this solves:

• Changing feed identities: although @mckinley@twtxt.net points out URLs can change, I think this syntax should be okay as long as the feed at that URL can be fetched, and as long as the current canonical URL for the feed lists this one as an alternate.
  
• editing, if you don’t care about message integrity
  
• finding the root of a thread, if you’re not following the author
  

An optional hash could be added if message integrity is desired. (E.g. if you don’t trust the feed author not to make a misleading edit.) Other recent suggestions about how to deal with edits and hashes might be applicable then.

People publishing multiple twts per second should include sub-second precision in their timestamps. As you suggested, the timestamp could just be copied verbatim.

@lyse@lyse.isobeef.org Sorry, I don’t think I ever had charset=utf8. I just noticed that a few days ago. OpenBSD’s httpd might not support including a parameter with the mime type, unfortunately. I’m going to look into it.

@prologic@twtxt.net, your first twtxt ever was o6dsrga, but I can’t find the source for it (the raw file). I reset everything, and re-fetched fresh feeds (allegedly including archives). Where is it?

the first version of the minibase flake cdn is online as of today. more details on how this is populated and funded will be coming along soon. currently minibase includes a very small selection of packages, but you can install them using the experimental flakes feature today! https://src.cyb.red/

@prx@si3t.ch I haven’t messed with rdomains, but still it might help if you included the command that produced that error (and whether you ran it as root).

So this is a great thread. I have been thinking about this too.. and what if we are coming at it from the wrong direction? Identity being tied to a given URL has always been a pain point. If i get a new URL its almost as if i have a new identity because not only am I serving at a new location but all my previous communications are broken because the hashes are all wrong.

What if instead we used this idea of signatures to thread the URLs together into one identity? We keep the URL to Hash in place. Changing that now is basically a no go. But we can create a signature chain that can link identities together. So if i move to a new URL i update the chain hosted by my primary identity to include the new URL. If i have an archived feed that the old URL is now dead, we can point to where it is now hosted and use the current convention of hashing based on the first url:

The signature chain can also be used to rotate to new keys over time. Just sign in a new key or revoke an old one. The prior signatures remain valid within the scope of time the signatures were made and the keys were active.

The signature file can be hosted anywhere as long as it can be fetched by a reasonable protocol. So say we could use a webfinger that directs to the signature file? you have an identity like frank@beans.co that will discover a feed at some URL and a signature chain at another URL. Maybe even include the most recent signing key?

From there the client can auto discover old feeds to link them together into one complete timeline. And the signatures can validate that its all correct.

I like the idea of maybe putting the chain in the feed preamble and keeping the single self contained file.. but wonder if that would cause lots of clutter? The signature chain would be something like a log with what is changing (new key, revoke, add url) and a signature of the change + the previous signature.

# chain: ADDKEY kex14zwrx68cfkg28kjdstvcw4pslazwtgyeueqlg6z7y3f85h29crjsgfmu0w 
# sig: BEGIN SALTPACK SIGNED MESSAGE. ... 
# chain: ADDURL https://txt.sour.is/user/xuu
# sig: BEGIN SALTPACK SIGNED MESSAGE. ...
# chain: REVKEY kex14zwrx68cfkg28kjdstvcw4pslazwtgyeueqlg6z7y3f85h29crjsgfmu0w
# sig: ...

@movq@www.uninformativ.de Yep, that’s very nice music. :-)

Can’t help myself, but I have to include the Uranus song now. :-D https://www.youtube.com/watch?v=OSWszdSHkyE#t=7

imo the only useful application would be so that I never have to get a new computer again unless mine breaks. i like being able to talk to people from around the world, so its going to have to include internet and video (y’all saw the impact tiktok had on the gaza situation, can’t deny that video is important)

@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?

Hello twtxt! I’m James (or @falsifian@www.falsifian.org). I live in Toronto. Recent interests include space complexity, simple software, and science fiction.

it works fine if you properly escape your urls!

 URIs include components and subcomponents that are delimited by
   characters in the "reserved" set.  These characters are called
   "reserved" because they may (or may not) be defined as delimiters by
   the generic syntax, by each scheme-specific syntax, or by the
   implementation-specific syntax of a URI's dereferencing algorithm.
   If data for a URI component would conflict with a reserved
   character's purpose as a delimiter, then the conflicting data must be
   percent-encoded before the URI is formed.

      reserved    = gen-delims / sub-delims
      gen-delims  = ":" / "/" / "?" / "#" / "[" / "]" / "@"
      sub-delims  = "!" / "$" / "&" / "'" / "(" / ")"
                  / "*" / "+" / "," / ";" / "="

Pinellas County - Warm up: 2.41 miles, 00:09:08 average pace, 00:21:59 duration
included some strides and felt pretty strong
#running

There is JavaScript, but not everything is implemented (properly). They’re writing everything including the JavaScript engine from scratch.

A huge effort 😲

@prologic@twtxt.net Sorry, my messages don’t get included in the current convo unless I tag you. Guess something gets lossed in translation with this weird posting issue. ANYWAY, it is rather perplexing. Clearly only an issue on my Pod, but what could the source of it be 🤔

@prologic@twtxt.net Righteo, so rookie error - I obviously had some untracked, rather important files for starting my pod and I ran a make clean. Why I originally had them in the git directory is anyone’s guess. Anyway it blew away those files including the database so that’s that. So your good self and @bender@twtxt.net etc - apologies but your profiles got nuked as well (as did my own but easily recreated).

Another thing I noticed which was the reason I ran make clean in the first place. I noticed my pod was being built with Go 1.22.4. Could this be a problem @prologic? preflight.sh actually errors out about it…

@bender@twtxt.net well there is “supercalifragilisticexpialidocious”!
I usualy hear people ask Harry Mack (a freestyle rapper) to include it in his freestyles. 😆

@hecanjog@hecanjog.com You need to include the full URL for the audio file for this to work across servers/pods ;)

Hey @sorenpeter@darch.dk, I’m sorry to tell you, but the prev field in your feed’s headers is invalid. 😅

First, it doesn’t include the hash of the last twt in the archive. Second, and that’s probably more important, it forms an infinite loop: The prev field of your main feed specifies http://darch.dk/twtxt-archive.txt and that file then again specifies http://darch.dk/twtxt-archive.txt. Some clients might choke on this, mine for example. 😂 I’ll push a fix soon, though.

For reference, the prev field is described here: https://dev.twtxt.net/doc/archivefeedsextension.html

the function can yield two values to include an index.

Google Chrome Gains AI Features Including a Writing Helper
Google is adding new AI features to Chrome, including tools to organize browser tabs, customize themes, and assist users with writing online content such as reviews and forum posts.

The writing helper is similar to an AI-powered feature already offered in Google’s experimental search experience, SGE, which helps users draft emails in various tones and lengths. W … ⌘ Read more

OH MY FREAKING HECK. So.. I made my pather able to run as Dijkstra or A* if the interface includes a heuristic.. when i tried without the heuristic it finished faster :|

So now to figure out why its not working right.

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.

I’m really bad at competitive programming. 🙄 For today’s #AdventOfCode puzzle, I spent an eternity trying to understand exactly what kind of bG9naWMgY2lyY3VpdAo= the puzzle input describes – I haven’t done that in well over a decade, so I made little progress. I knew right from the start that SSBoYWQgdG8gbG9vayBmb3IgY3ljbGUgbGVuZ3RocyBhbmQgdGhlbiBmaW5kIHRoZSBMQ00K. It just didn’t occur to me to just run my program on cGFydGlhbCBpbnB1dAo= and print those numbers. 🥴 I only did that after over 4 hours (including time to debug my nasty C code) and then, boom, solution …

@prologic@twtxt.net what do you mean when you say “Docker API”? There are multiple possible meanings for that. podman conforms to some of Docker’s APIs and it’s unclear to me which one you say it’s not conforming to.

You just have to Google “podman Docker API” and you find stuff like this: https://www.redhat.com/sysadmin/podman-rest-api

Podman’s REST API consists of two components:

• A Docker-compatible portion called Compat API
  
• A native portion called Libpod API that provides access to additional features not available in Docker, including pods
  

Or this: https://docs.podman.io/en/latest/markdown/podman-system-service.1.html

The REST API provided by podman system service is split into two parts: a compatibility layer offering support for the Docker v1.40 API, and a Podman-native Libpod layer.

All it’s about definitions:

“people who want clarity things will tighten their definitions, so they’ll reduce the scope or boundaries. People who are attempting to misuse definitions will shift them around or weaken the definitions to include more stuff. They get less precise.”

https://theprogrammersparadox.blogspot.com/2022/12/definitions.html

@prologic@twtxt.net I see what you mean about tldraw. I looked at their github repository and it seems like they are distributing it as an npm package for people who want to include a whiteboard in their Javascript-based frontend. I didn’t see a way to just launch the thing.

I have half a mind to write a little scala frontend that sets up one of these, since scalajs makes it very easy to use these Javascript web component things while making it look like you’re writing scala.

Question to all you Gophers out there: How do you deal with custom errors that include more information and different kinds of matching them?

I started with a simple var ErrPermissionNotAllowed = errors.New("permission not allowed"). In my function I then wrap that using fmt.Errorf("%w: %v", ErrPermissionNotAllowed, failedPermissions). I can match this error using errors.Is(err, ErrPermissionNotAllowed). So far so good.

Now for display purposes I’d also like to access the individual permissions that could not be assigned. Parsing the error message is obviously not an option. So I thought, I create a custom error type, e.g. type PermissionNotAllowedError []Permission and give it some func (e PermissionNotAllowedError) Error() string { return fmt.Sprintf("permission not allowed: %v", e) }. My function would then return this error instead: PermissionNotAllowedError{failedPermissions}

At some layers I don’t care about the exact permissions that failed, but at others I do, at least when accessing them. A custom func (e PermissionNotAllowedError) Is(target err) bool could match both the general ErrPermissionNotAllowed as well as the PermissionNotAllowedError. Same with As(…). For testing purposes the PermissionNotAllowedError would then also try to match the included permissions, so assertions in tests would work nicely. But having two different errors for different matching seems not very elegant at all.

Did you ever encounter this scenario before? How did you address this? Is my thinking flawed?

@movq@www.uninformativ.de
Doesn’t even compile on my system, which is apparently broken:

> cc -Wall -Wextra -o win win.c $(pkg-config --cflags --libs gtk4)                                                                                                        
cc: error: unrecognized argument in option ‘-mfpmath=sse -msse -msse2 -pthread -I/usr/include/gtk-4.0 -I/usr/include/gio-unix-2.0 -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/harfbuzz -I/usr/include/pango-1.0 -I/usr/include/fribidi -I/usr/include/harfbuzz -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/x86_64-linux-gnu -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/uuid -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/graphene-1.0 -I/usr/lib/x86_64-linux-gnu/graphene-1.0/include -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -lgtk-4 -lpangocairo-1.0 -lpango-1.0 -lharfbuzz -lgdk_pixbuf-2.0 -lcairo-gobject -lcairo -lgraphene-1.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0’
cc: note: valid arguments to ‘-mfpmath=’ are: 387 387+sse 387,sse both sse sse+387 sse,387

Erlang Solutions: How ChatGPT improved my Elixir code. Some hacks are included.
I have been working as an Elixir developer for quite some time and recently came across the ChatGPT model. I want to share some of my experience interacting with it.

During my leisure hours, I am developing an open-source Elixir initiative, Crawly, that facilitates the extraction of structured data from the internet.

Here I want to demonstrate how … ⌘ Read more

TornadoVM Continues Adapting Java OpenJDK/GraalVM For Heterogeneous Hardware
A new release of TornadoVM is now available, the open-source plug-in to OpenJDK and GraalVM to allow for Java code to run on heterogeneous hardware with ease – including various GPU models as well as FPGAs… ⌘ Read more

Metaverse Could Contribute Up To 2.4% of US GDP By 2035, Study Shows
A study commissioned by Meta has found that the metaverse could contribute around 2.4% to U.S. annual GDP by 2035, equating to as much as $760 billion. Reuters reports: The concept of the metaverse includes augmented and virtual reality technologies that allow users to immerse themselves in a virtual world or overlay information digitally on … ⌘ Read more

@xuu@txt.sour.is LOL omfg.

This is the absurd logical endpoint of free market fundamentalism. “The market will fix everything!” Including, apparently, encroaching floodwater.

I do have to say though, after spending awhile looking at houses, that there are a crapton of homes for sale for very high prices (>$1 million) in coastal areas NASA is more or less telling us will be underwater in the next few decades. I don’t get how a house that’s going to be underwater soon is worth $1 million, but then I’m never been a free market fundamentalist either so 🤷 Maybe they’re all watertight.

I may have misspoken in my haste/anguish. I don’t know of any examples of Ben Shapiro advocating rape. I do know them of Jordan Peterson. He’s known for that, but I’ve seen it myself. So, to be clear, I don’t know if Ben Shapiro is a rape apologist and have no evidence of that. Wouldn’t surprise me frankly because the set of ideas he does talk about tends to include being A-OK with crimes against women, but anyway.

There’s a link to the blog post, but they extracted a summary in hopes of keeping people in Google properties (something they’ve been called out on many times).

I was never contacted to ask if I was OK with Google extracting a summary of my blog post and sticking it on the web site. There is a very clear copyright designation at the bottom of each page, including that one. So, by putting their own brand over my text, they violated my copyright. Straightforward theft right there.

There is a “right” way to make something like GitHub CoPilot, but Microsoft did not choose that way. They chose one of the most exploitative options available to them. For that reason, I hope they face significant consequences, though I doubt they will in the current climate. I also hope that CoPilot is shut down, though I’m pretty certain it will not be.

Other than access to the data behind it, Microsoft has nothing special that allows it to create something like CoPilot. The technology behind it has been around for at least a decade. There could be a “public” version of this same tool made by a cooperating group of people volunteering, “leasing”, or selling their source code into it. There could likewise be an ethically-created corporate version. Such a thing would give individual developers or organizations the choice to include their code in the tool, possibly for a fee if that’s something they want or require. The creators of the tool would have to acknowledge that they have suppliers–the people who create the code that makes their tool possible–instead of simply stealing what they need and pretending that’s fine.

This era we’re living through, with large companies stomping over all laws and regulations, blatantly stealing other people’s work for their own profit, cannot come to an end soon enough. It is destroying innovation, and we all suffer for that. Having one nifty tool like CoPilot that gives a bit of convenience is nowhere near worth the tremendous loss that Microsoft’s actions in this instace are creating for everyone.

@abucci@anthony.buc.ci So.. The issue is that its showing the password by default? Would making an alias to always include the -c help? We can probably engage Jason with a PR to enable a more hardened approach when desired. I’ve spoken to him before and is generally a pretty open to ideas.

I found this app that was created by the gopass author that does copy by default and has a tui or GUI mode https://github.com/cortex/ripasso

@prologic@twtxt.net @movq@www.uninformativ.de this is the default behavior of pass on my machine:

I add a new password entry named example and then type pass example. The password I chose, “test”, is displayed in cleartext. This is very bad default behavior. I don’t know about the other clis you both mentioned but I’ll check them out.

The browser plugin browserpass does the same kind of thing, though I have already removed it and I’m not going to reinstall it to make a movie. Next to each credential there’s an icon to copy the username to the clipboard, an icon to copy the password to the clipboard, and then an icon to view details, which shows you everything, including the password, in cleartext. The screencap in the Chrome store is out of date; it doesn’t show the offending link to show all details, which I know is there because I literally installed it today and played with it.

@xuu@txt.sour.is that doesn’t seem to fit the spirit of the spec, at least by my read (I could be wrong obv). The example on Wikipedia’s webfinger page,

{
	"subject": "acct:bob@example.com",
	"aliases": [
		"https://www.example.com/~bob/"
	],
	"properties": {
		"http://example.com/ns/role": "employee"
	},
	"links": [{
			"rel": "http://webfinger.example/rel/profile-page",
			"href": "https://www.example.com/~bob/"
		},
		{
			"rel": "http://webfinger.example/rel/businesscard",
			"href": "https://www.example.com/~bob/bob.vcf"
		}
	]
}

and then the comparison with how mastodon uses webfinger,

{
    "subject": "acct:Mastodon@mastodon.social",
    "aliases": [
        "https://mastodon.social/@Mastodon",
        "https://mastodon.social/users/Mastodon"
    ],
    "links": [
        {
            "rel": "http://webfinger.net/rel/profile-page",
            "type": "text/html",
            "href": "https://mastodon.social/@Mastodon"
        },
        {
            "rel": "self",
            "type": "application/activity+json",
            "href": "https://mastodon.social/users/Mastodon"
        },
        {
            "rel": "http://ostatus.org/schema/1.0/subscribe",
            "template": "https://mastodon.social/authorize_interaction?uri={uri}"
        }
    ]
}

suggests to me you want to leave the subject/acct bit as is (don’t add prefixes) and put extra information you care to include in the links section, where you’re free to define the rel URIs however you see fit. The notion here is that webfinger is offering a mapping from an account name to additional information about that account, so if anything you’d use a "subject": "acct:SALTY ACCOUNT_REPRESENTATION" line in the JSON to achieve what you’re saying if you don’t want to do that via links.

Why, oh why, does YouTube include upcoming videos in RSS feeds? “This video premiers in 21 hours.” Oohhhhhhkay. I will long have forgotten about it by then, thank you very much.

Data Point
⌘ Read more

@prologic@twtxt.net Error handling especially in Go is very tricky I think. Even though the idea is simple, it’s fairly hard to actually implement and use in a meaningful way in my opinion. All this error wrapping or the lack of it and checking whether some specific error occurred is a mess. errors.As(…) just doesn’t feel natural. errors.Is(…) only just. I mainly avoided it. Yesterday evening I actually researched a bit about that and found this article on errors with Go 1.13. It shed a little bit of light, but I still have a long way to go, I reckon.

We tried several things but haven’t found the holy grail. Currently, we have a mix of different styles, but nothing feels really right. And having plenty of different approaches also doesn’t help, that’s right. I agree, error messages often end up getting wrapped way too much with useless information. We haven’t found a solution yet. We just noticed that it kind of depends on the exact circumstances, sometimes the caller should add more information, sometimes it’s better if the callee already includes what it was supposed to do.

To experiment and get a feel for yesterday’s research results I tried myself on the combined log parser and how to signal three different errors. I’m not happy with it. Any feedback is highly appreciated. The idea is to let the caller check (not implemented yet) whether a specific error occurred. That means I have to define some dedicated errors upfront (ErrInvalidFormat, ErrInvalidStatusCode, ErrInvalidSentBytes) that can be used in the err == ErrInvalidFormat or probably more correct errors.Is(err, ErrInvalidFormat) check at the caller.

All three errors define separate error categories and are created using errors.New(…). But for the invalid status code and invalid sent bytes cases I want to include more detail, the actual invalid number that is. Since these errors are already predefined, I cannot add this dynamic information to them. So I would need to wrap them à la fmt.Errorf("invalid sent bytes '%s': %w", sentBytes, ErrInvalidSentBytes"). Yet, the ErrInvalidSentBytes is wrapped and can be asserted later on using errors.Is(err, ErrInvalidSentBytes), but the big problem is that the message is repeated. I don’t want that!

Having a Python and Java background, exception hierarchies are a well understood concept I’m trying to use here. While typing this long message it occurs to me that this is probably the issue here. Anyways, I thought, I just create a ParseError type, that can hold a custom message and some causing error (one of the three ErrInvalid* above). The custom message is then returned at Error() and the wrapped cause will be matched in Is(…). I then just return a ParseError{fmt.Sprintf("invalid sent bytes '%s'", sentBytes), ErrInvalidSentBytes}, but that looks super weird.

I probably need to scrap the “parent error” ParseError and make all three “suberrors” three dedicated error types implementing Error() string methods where I create a useful error messages. Then the caller probably could just errors.Is(err, InvalidSentBytesError{}). But creating an instance of the InvalidSentBytesError type only to check for such an error category just does feel wrong to me. However, it might be the way to do this. I don’t know. To be tried. Opinions, anyone? Implementing a whole new type is some effort, that I want to avoid.

Alternatively just one ParseError containing an error kind enumeration for InvalidFormat and friends could be used. Also seen that pattern before. But that would then require the much more verbose var parseError ParseError; if errors.As(err, &parseError) && parseError.Kind == InvalidSentBytes { … } or something like that. Far from elegant in my eyes.

Types of Scopes
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@prologic@twtxt.net Re: Chat system, What if the base specification included a system for per-user arbitrary JSON storage on the server? Kind of like XEP-0049, but expanded upon. Two kinds of objects: public and private. Public objects can be queried by anyone, private objects cannot and must be encrypted with the user’s private key. Public keys could be stored there, as well as anything else defined by extensions. Roster, user block list, avatar, etc.

Cloud Computing and Virtualization Company Citrix To Be Acquired for $16.5B
Citrix, a cloud computing and virtualization company used by companies including Microsoft, Google, and SAP, has revealed plans to be acquired by affiliates of global investment firm Vista Equity Partners, and an affiliate of Elliott Investment Management called Evergreen Coast Capital Corporation. From a report: The all-cash deal i … ⌘ Read more

iOS has had a “Shortcuts” app for a while now which is very useful for scripting things on the device, and at some point grew the ability to run things via ssh, including piping input/output. It’s how I’ve done twtxt from my phone for a while now. I’ll clean up these two examples and post to the examples I’ve shared. http://a.9srv.net/shortcuts

Jerome Powell Says the Fed is Prepared To Raise Rates To Tame Inflation
Jerome H. Powell, the Federal Reserve chair, told lawmakers on Tuesday that a rapidly healing economy no longer needed as much help from the central bank and that keeping inflation in check – including by raising interest rates – would be critical for enabling a stable expansion that benefits workers. From a report: Mr. Powell, … ⌘ Read more