Is there any possibility to extract JSON response data when performing a DownloadRequest?

[aaskrv]

Hello,

I am downloading a PDF file from a specific URL using .downloadParameters task and everything works fine, PDF is displayed properly. The problem occurs when I receive an error with a JSON in response as I cannot parse and extract data from it to display the received error message.

Example Response Body that the server sends:

{
  "error" : {
    "code" : "error_code",
    "message" : "error message",
    "title" : "error title",
    "type" : "error type"
  },
  "tracing" : "error tracing",
  "status" : "error"
}

At the start, before I found the reason, this response did not even display in the Moya NetworkLogger logs and I started to investigate why. As I found out further, it was because there was no response data extracted for the DownloadRequest type requests, and response data is available only for DataRequest and DataStreamRequest types.

extension DownloadRequest: Requestable {
    internal func response(callbackQueue: DispatchQueue?, completionHandler: @escaping RequestableCompletion) -> Self {
        if let callbackQueue = callbackQueue {
            return response(queue: callbackQueue) { handler  in
                completionHandler(handler.response, handler.request, **nil**, handler.error)
            }
        } else {
            return response { handler  in
                completionHandler(handler.response, handler.request, **nil**, handler.error)
            }
        }
    }
}

So, the question is: Is there any possible solution to extract response data to display the error message, while performing a file download request?

p.s.: Moya version I am using is 15.0.0