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lyse
lyse.isobeef.org
 (2y ago)

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?

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xuu
txt.sour.is
 (4y ago)

@fastidious@arrakis.netbros.com the things Gemini has going for it are mutual TLS and lack of JavaScript. Which makes for a secure albeit boring experience (much like gopher). The fake markdown is a bit of a drag.

A render mode for Gemini probably wouldnt be too hard. There are markdown to Gemini libs out there.

With Web3 the whole trust a 3rd party browser ext + high fees + env impact for compute and storage are serious no gos for me.. I have heard one too many horror stories about clicking the wrong link and some script draining your metamask wallet.

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xuu
txt.sour.is
 (4y ago)
↳ In-reply-to » Twtxt is still very much alive and well. I just wrote a quick tool to crawl as much of the Twtxt network as I could and here's what the results are:

@prologic@twtxt.net that seems to match my numbers. are you picking up the few gophers out there?

kinda makes me wonder about the ~300k you have cached. y’all got the library of alexandria over there.

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xuu
txt.sour.is
 (4y ago)
↳ In-reply-to » I just built a poc search engine / crawler for Twtxt. I managed to crawl this pod (twtxt.net) and a couple of others (sorry @etux and @xuu I used your pods in the tests too!). So far so good. I might keep going with this and see what happens 😀

@prologic@twtxt.net yeah it reads a seed file. I’m using mine. it scans for any mention links and then scans them recursively. it reads from http/s or gopher. i don’t have much of a db yet.. it just writes to disk the feed and checks modified dates.. but I will add a db that has hashs/mentions/subjects and such.

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