Alamofire + Combine: Get the HTTP response status code - ios

Question

I am currently using Alamofire which contains Combine support and using it following way:
let request = AF.request(endpoint)
...
request
.publishDecodable(type: T.self, decoder: decoder)
.value()
.eraseToAnyPublisher()
This will publish result and AFError but from subscriber's .sink, I can't find anywhere to get the HTTP status code. What's the best way to get the status code in subscriber?

Answer 1

If you want the response code, don't erase the DataPublisher using .value(). Instead, use the DataResponse you get from the various publish methods, which includes all of the various response information, including status code. You can then .map it into whatever type you need.

Answer 2

For Swift 5.X and Xcode 12.4
For debugging purposes you can intercept the response right before the Combine publisher (publishDecodable()) and get some of the elements of the URL Response, with :
session.request(signedRequest)
.responseJSON { response in
print(response.request) // original URL request
print(response.response) // URL response
print(response.data) // server data
print(response.result) // result of response serialization
}

Answer 3

The easy MVVM way:
func fetchChats() -> AnyPublisher<ChatListModel, AFError> {
let url = URL(string: "Your_URL")!
AF.request(url, method: .get)
.validate()
.publishDecodable(type: ChatListModel.self)
.value()
.receive(on: DispatchQueue.main)
.eraseToAnyPublisher()
}
Later in viewModel
private var subscriptions: Set<AnyCancellable> = []
// some func
dataManager.fetchChats()
.sink {[weak self] completion in
guard let self = self else { return }
switch completion {
case .failure(let error):
switch error.responseCode {
case 401:
//do something with code
default:
print(error.responseCode)
}
print("All errors:\(error)")
case .finished:
break
}
} receiveValue: {[weak self] message in
guard let self = self else { return }
self.message = message
}
.store(in: &subscriptions)