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Download Error, how to extract info

Download Error, how to extract info

David E.64
New member | Level 1

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!

2 Replies 2

Re: Download Error, how to extract info

Greg-DB
Dropboxer

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.

Re: Download Error, how to extract info

David E.64
New member | Level 1

thanks Gregory, i'll give that a bash 👍 

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    David E.64 New member | Level 1
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