Why is my url being modified with my setup? - alamofire

Question

I have a tt-rss server I host behind a Trafik instance. The host is something like ttrss.example.com and I access it on the web like https://ttrss.example.com. It works just fine anywhere on the internet.
When I try to make a request like
AF
.request(
"\(url)/api",
method: .post,
parameters: ["user": user, "password": password],
encoding: JSONEncoding.default
)
.responseDecodable(of: SessionResponseModel.self) { response in
debugPrint("Response: \(response)")
}
I get an error like
2022-09-29 21:24:36.652181-0400 ttc[89065:7539083] Task <808A492A-D131-448F-ADFD-4EE7158251D9>.<2> finished with error [-1022] Error Domain=NSURLErrorDomain Code=-1022 "The resource could not be loaded because the App Transport Security policy requires the use of a secure connection." UserInfo={NSLocalizedDescription=The resource could not be loaded because the App Transport Security policy requires the use of a secure connection., NSErrorFailingURLStringKey=http://ttrss.example.com:8889/api/, NSErrorFailingURLKey=http://ttrss.example.com:8889/api/, _NSURLErrorRelatedURLSessionTaskErrorKey=(
"LocalDataTask <808A492A-D131-448F-ADFD-4EE7158251D9>.<2>"
), _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <808A492A-D131-448F-ADFD-4EE7158251D9>.<2>, NSUnderlyingError=0x600002b39e60 {Error Domain=kCFErrorDomainCFNetwork Code=-1022 "(null)"}}
As you can see somewhere along the line Alamofire modified my url. Incidentally 8889 is the port my tt-rss server is running at behind Traefik.
My question is: why is Alamofire not just using the url I provide and like... Further resolving the url, but only partially?
I don't think this is an issue with neither tt-rss nor Traefik because both of those things are working just fine on every other part of the internet. There could be some config I am missing in Trafik that Alamofire needs, but beyond that I am not sure what I am doing wrong here.
Edit: I no longer thing this is Alamofire doing this. I believe it's Swift or iOS that's resolving the URL improperly (according to me).

Answer 1

If you read the error, this is an App Transport Security error, meaning the system wasn't able to securely connect based on the default ATS rules. In your case it's because you're not using https at all. You either need to connect using https, or if you can't, enable insecure connections for that domain using the methods indicated in Apple's documentation.