let rx_request = Observable.create { (observer) -> Disposable in
let requestReference = Alamofire.request(.POST, url, parameters: payload)
.responseJSON(completionHandler: { (response) in
if let value = response.result.value {
observer.onNext(value)
observer.onCompleted()
}else if let error = response.result.error {
observer.onError(error)
}
})
return AnonymousDisposable {
requestReference.cancel()
}
}