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I'm getting redirected from a website to my ktor server like that:
<http://localhost:3000/callback#somedata=somedata&amp;moredata=data>
Is it possible with ktor to read these things after the #?

no, browsers do not send the URL fragment (`#...`) to the server

in browsers theres like this hashchange event thing

yes, the client-side JS has access to the fragment/hash, but the server-side (ktor) does not

it would be much more common to use `?...` query parameters to forward information to the server. if you are stuck with `#` then you need custom JS code to send an additional request in non-fragment form to make it visible on the server

can't change that its with that #. Is it easy to do this custom js code / how would I do that?

Hmm, maybe intercept this callback with your frontend and then invoke some backend api with hash converted to query string?

My problem is that this ktor server is really (or was) only there for receiving this data and doesn't have anything else. After it receives this data the server gets destroyed

In case anyone wondering I just created a static html file which gets these hashes and then makes a get request on my server route