Extract data from Algorithmia response

Question

I am currently making an app that sends data to an Algorithmia algorithm where it is processed. A response of where to find the file is then sent back to the app in this form:

Optional({
output = "data://.algo/deeplearning/AlgorithmName/temp/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.png";})

I need a way to extract the randomly generated 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.png' section of the response. It needs to be stored in a string which I will use later.

Programming language: Swift 3
Device: iOS
Library in use: Algorithmia (https://algorithmia.com) (https://github.com/algorithmiaio/algorithmia-swift)

just get the lastPathComponent from your url / path. `URL(string: "data://.algo/deeplearning/AlgorithmName/temp/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.png")?.lastPathComponent ?? ""` — Leo Dabus, Jan 15 '17 at 01:09
@LeoDabus I'm not entirely sure how to do that. The lines of code before says `let response = resp.getJson()` then `print(response)` basically saying get the response from the Algorithmia API. It then prints the response (stated above) in the debugger. — benfernandes, Jan 15 '17 at 02:02
I believe you're looking for `response?['output'] as? String` to extract that URL string. Then Leo's comment should be able to get you the filename. — anowell, Jan 15 '17 at 22:46
It worked after a little tweaking with how the json code was initially entered into the `['output']` bit.
I ended up writing changing the response into a string before the output was taken. The output also had to be written like `["output"]` instead. Thank you for the help! — benfernandes, Jan 16 '17 at 11:50

score 1 · Accepted Answer · answered Jan 16 '17 at 11:54

Final code:

if let json = response as? [String: Any] {
                print(json)

                let filePath = json["output"] as? String
                print("File path: \(filePath!)")

                let uwFilePath = filePath!

                let index = uwFilePath.index(uwFilePath.startIndex, offsetBy: 57)
                self.imageFileName = uwFilePath.substring(from: index)

                print(self.imageFileName)
            }

imageFileName is storing the final file name for later use. The begining part of the output string is also being cut off.

Extract data from Algorithmia response

1 Answers1