Alamofire retry request - reactive way - swift

Question

I was looking at those two:
http://sapandiwakar.in/refresh-oauth-tokens-using-moya-rxswift/
Using retryWhen to update tokens based on http error code
And trying to create similiar thing, but without Moya, using Alamofire + RxSwift.
First of all is obviously where should I stick this, since my implementation is divided into a couple smaller parts.
First of all I have my custom method for generating reactive requests:
static func rx_request<T>(requestConvertible: URLRequestConvertible, completion: (Request) -> Observable<T> ) -> Observable<T> {
let manager: Manager = Manager.sharedInstance
return manager
.rx_request { manager -> Request in
return Alamofire.request(requestConvertible)
}
.flatMap { request -> Observable<T> in
return completion(request)
}
.shareReplay(1)
}
Which is later used by specific Requests convenience classes. For example my UserRequests has this private extension to extract some common code from it's methods:
private extension Request {
func rx_userRequest() -> Observable<User> {
return self
.validate()
.rx_responseJSON()
.flatMap{ (request, json) -> Observable<User> in
guard
let dict = json as? [ String: AnyObject ],
let parsedUser: User = try? Unbox(dict) else {
return Observable.error(RequestError.ParsingError)
}
return Observable.just(parsedUser)
}
.rx_storeCredentials()
}
}
Because of how things looks like I wonder whare's the right place to put a retry method and also how to implement it? Because depending on the location I can get different input arguments.

Answer 1

The retry code has to go after the first try, which is rx_responseJSON so the way you have things setup now, it must go between that and the flatMap after it.