Im seeing

Unhandled redirect: DELETE <https://foo.bar>. Status: 301 Moved Permanently. Text: ""

for certain requests. Yet, the URL:s work perfectly fine when using curl in the command line. Why could that be?

Is your client engine configured to follow redirects? https://ktor.io/docs/http-redirect.html If you’re using the OkHttp engine, you might check that configuration as well. By default, OkHttp doesn’t follow redirects, so you may need to enable it there before passing the OkHttp instance to Ktor https://square.github.io/okhttp/4.x/okhttp/okhttp3/-ok-http-client/-builder/follow-redirects/

Furthermore, I have the following specified

followRedirects = true

(forgot to press send earlier 😅).

A 301 status code indicates a permanent redirect, and per the HTTP spec it’s required that it includes a

Location

header with the URL to redirect to. It’s commonly used to upgrade an HTTP connection to HTTPS, for example. https://en.wikipedia.org/wiki/HTTP_301 Also, by default it looks like the Ktor client only handles redirection for GET requests, while you’re is a DELETE. You might try configuring it to set this property to false so it also works for DELETE

Ill try adjusting the property tomorrow morning! Is it possible that theres a redirect happening even though the URL:s are identical?

I’m not too sure what exactly the Ktor engine’s logic is, but I could imagine a strange situation where the server might issue a redirect to the same URL with some additional cookies or other headers

It works after changing the property, thank you!

Please note: changing this flag could lead to security issues, consider changing the request URL instead.

I dont believe this is possible for me to do, given that theyre identical on the surface? Also, never thought about the server adding cookies/headers like that - but makes sense, Ill check with the API owners about this.

Ah, yeah adding (or removing) a trailing slash is another common situation for redirects, especially when the server is something like Wordpress or another PHP CMS