Download Error, how to extract info

[David E.64]

Hi,

I am brand new to Swift, in fact only started looking at it in order to use swiftydropbox! Currently I don't see how to extract info from the downloadError without doing string finding jiggery pokkery! 

I am coming from objC class and sending a download with completion message to my swift wrapper class which contains client.files.download()

if there is no response I am doing this: 

                    completion(success: false, error: error?.description)

however I am finding it tricky to use this error description back in my objC class. What is best way to simply get the error code out of this or the NSUnderlyingError? I feel sure I don't need to go wading into that string and searching for key phrases? 

Thanks and sorry for the noob question!

[Greg-DB]

Hi David, here's an example of using files.download with every error case handled in Swift: (apologies for the poor formatting on the forum)

Dropbox.authorizedClient!.files.download(path: path, destination: destination).response { response, error in
 if let (metadata, url) = response {
 print("*** Download file ***")
 print("Downloaded file name: \(metadata.name)")
 print("Downloaded file url: \(url)")
 } else if let callError = error {
 switch callError as CallError {
 case .RouteError(let boxed, let requestId):
 print("RouteError[\(requestId)]:")
 switch boxed.unboxed as Files.DownloadError {
 case .Path(let fileLookupError):
 print("PathError: ")
 switch fileLookupError {
 case .MalformedPath(let malformedPathError):
 print("MalformedPath: \(malformedPathError)")
 case .NotFile:
 print("NotFile")
 case .NotFolder:
 print("NotFolder")
 case .NotFound:
 print("NotFound")
 case .RestrictedContent:
 print("RestrictedContent")
 case .Other:
 print("Other")
 }
 case .Other:
 print("Other")
 }
 case .BadInputError(let message, let requestId):
 print("BadInputError[\(requestId)]: \(message)")
 case .HTTPError(let code, let message, let requestId):
 print("HTTPError[\(requestId)]: \(code): \(message)")
 case .InternalServerError(let code, let message, let requestId):
 print("InternalServerError[\(requestId)]: \(code): \(message)")
 case .OSError(let err):
 print("OSError: \(err)")
 case .RateLimitError:
 print("RateLimitError")
 }

 }
}

If I understand your question correctly, you can do the specific error detection in your Swift code, and then send whatever indicator or information you want back to the Objective-C side, as opposed to the error object or description itself.

[David E.64]

thanks Gregory, i'll give that a bash 👍