how to set a default http header with alamofire

Question

I want to set a header so that all requests include an authorized token header once the user logs in. I thought I could set the header in the shared alamofire manager by calling my setToken function but I don't think I'm doing it correctly. What's my mistake? Is there a better way of setting a default header for all alamofire requests?

 class UserService : NSObject {

    static let manager: Alamofire.Manager = Alamofire.Manager(configuration:  NSURLSessionConfiguration.defaultSessionConfiguration())

    class func setToken(token:String){
        manager.session.configuration.HTTPAdditionalHeaders = [
            "x-token": token
        ]

    }

   class func addFriend(user:LoggedUser, uname:String, callback:((success: Bool, errorMsg: String?)->Void)) {

        let params:[String : AnyObject] = ["uname": uname]

        let url = AppConfig.sharedInstance().baseURL() + "/user/\(user.userId!)/friends"
        Alamofire.request(.POST, url , parameters:params, encoding:.JSON)
            .responseJSON(options: .MutableContainers, completionHandler:{ (request, response, JSON, error) -> Void in

        //token is not set in the request
    }

}

Answer 1

Your code never make use of your custom manager, use following code:

class CustomManager: Manager {
    static public let manager = CustomManager.generateManager()
    class func generateManager()-> CustomManager {
        var defaultHeaders = Alamofire.Manager.defaultHTTPHeaders ?? [:]
        defaultHeaders["x-token""] = "token"
        let configuration = NSURLSessionConfiguration.defaultSessionConfiguration()
        configuration.HTTPAdditionalHeaders = defaultHeaders
        let manager = CustomManager(configuration: configuration)
        return manager
    }
}

class UserService : NSObject {

   class func addFriend(user:LoggedUser, uname:String, callback:((success: Bool, errorMsg: String?)->Void)) {

        let params:[String : AnyObject] = ["uname": uname]

        let url = AppConfig.sharedInstance().baseURL() + "/user/\(user.userId!)/friends"
        CustomManager.manager(.POST, url , parameters:params, encoding:.JSON)
            .responseJSON(options: .MutableContainers, completionHandler:{ (request, response, JSON, error) -> Void in

        // ...
    }
}