rx_question.swift

var token = "a JWT token"

// ...
var req = URLRequest(url: URL(string: "\(api_uri)/auth/refresh")!)
req.httpMethod = "POST"
req.addValue("Authorizetion", forHTTPHeaderField: token)

URLSession.shared.rx.data(request: req)
    .map{ try! JSONDecoder().decode(TokenResult.self, from: $0) }
    .map({ (result) -> TokenResult in
        print(123) // 這裡不會印出...斷點也斷不到 ?
        UserDefaults.standard.set(result.token, forKey: "token")
        return result
    })
    .map{ try! JWTDecode.decode(jwt: $0.token) }
    .subscribe(onNext: {[weak self] (jwt) in
        self?.currentUser.onNext(AuthUser(uid: jwt.subject!,
                                          displayName: jwt.claim(name: "displayName").string!,
                                          level: jwt.claim(name: "level").integer!))
    }, onError: {[weak self] (error) in
        print(error)
        self?.currentUser.onNext(nil)
    }).disposed(by: disposeBag)

structs.swift

struct AuthUser {
    var uid: String
    var displayName: String
    var level: Int
}

struct TokenResult: Codable {
    var token: String
}