cURL equivalent in Swift - iOS

Question

I've tried different things to create the swift equivalent of this cURL request, but I couldn't get it working.

curl -X POST -F "file=@/Users/nicolas/sample.png" -F "mode=document_photo" https://api.idolondemand.com/1/api/sync/ocrdocument/v1 -F "apikey=xxx-xxx-xxx-xxx-xxx"

The respective code is posted below.

func getText (image: UIImage){

    let apiKey = "xxx-xxx-xxx-xxx-xxx"

    let request = NSMutableURLRequest(URL: NSURL(string: "https://api.idolondemand.com/1/api/sync/ocrdocument/v1")!)
    request.HTTPMethod = "POST"
    request.addValue(apiKey, forHTTPHeaderField: "apikey")
    request.addValue("document_photo", forHTTPHeaderField: "mode")
    request.HTTPBody = UIImageJPEGRepresentation(image, 1)

    let task = NSURLSession.sharedSession().uploadTaskWithRequest(request, fromData: UIImageJPEGRepresentation(image, 1), completionHandler: {data, response, error -> Void in


        if let _ = data {
            var error:NSError? = nil
            do {
                let jsonObject : AnyObject = try NSJSONSerialization.JSONObjectWithData(data!, options: [])
                let json = JSON(jsonObject)
                if let ocr_results = json["text_block"][0]["text"].string {
                    self.returnText(ocr_results)
                }
            } catch let error1 as NSError {
                error = error1
                print(error)
            } catch {
                fatalError()
            }
        }

})

I would be happy if I get a response.

Answer 1

In the curl command, you are defining the form fields file, mode and apikey, and you need to encode them in the form multipart/form-data and put this in the HTTPBody. Some quick googling reveals the library SRWebClient (among many others) that will help you make this sort of request.