Alamofire best way to recall api on failure - ios

Question

I need to recall the api when receiving an specific error say error code -1005.
I want to handle this in Alamofire files so that it can work with all api in project.
I was handling this in ObjC's AFNetworking in dataTaskWithHTTPMethod with below code:-
if (failure)
{
if (error.code == -1005)
{
[self POST:URLString parameters:parameters progress:nil success:success failure:failure];
}
}
Can anyone help me to do this in Alamofire?

Answer 1

lets understand with One Example.
let me guess as you have created one class for managing all the webservice realted stuff there. (if not yet then it will be good to create one for best practice).
Okay now create two typealias for managing response.
here it is :-
here i assume again that you want whole dictionary for success response and error for failure response.
typealias successCompletion = (([String:Any]) -> ())
typealias failureCompletion = ((Error) -> ())
now here its one WSManager Class for handling all the API Related stuff there.
class AlamofireManager {
static func sampleFunctionOfWebService(successCompletion:successCompletion , failureCompletion:failureCompletion) {
if success {
successCompletion(["Key":"success"])
} else {
failureCompletion(-1005 as! Error)
}
}
}
you need to pass the both typealias in function for getting CallBack
in desired class.
Here for only understanding purpose we are going to pass static
dictionary :-> ["Key":"success"] and static -1005 as Error.
now how to use this function in our desired class?
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func wsCalling() {
AlamofireManager.sampleFunctionOfWebService(successCompletion: { (dict) in
print(dict)
}) { (error) in
if error.code == -1005 {
self.wsCalling() // recall API Again
} else {
// your other logic
}
}
}
}
I have not mentioned here for URLSeeionTask and All , its good thing
to manage URLSeeionTask. If you have a instance of URLSeeionTask of
Previous API then cancel it first and then try to recall it again.
Happy Coding.

Answer 2

//MARK: Your method
func hitYourService(){
showActivityIndicator(decision: true, inViewConroller: self, animated: true)
let deviceToken = HelpingClass.userDefaultForKey(key: "deviceToken")
let paramDict = ["email":txtFEmail.text ?? "" ,"password":txtFPassword.text ?? "" ,"device_token":deviceToken]
NetworkManager.instance().hitPostServiceJsonForm(paramDict, myReqURL: ServiceMethods.serviceBaseURL+ServiceMethods.login, unReachable: {
// Here you can handle the case if there is no internet connection
}) { (response) in
showActivityIndicator(decision: false, inViewConroller: self, animated: true)
if response != nil{
if response?["error_code"] as! Int == 0{
//Handle your response
}else{
//Show error
showHudWithMessage(message: response?["error_msg"] as! String, inViewConroller: self, animated: true, hideAfter: 2)
}
}else{
//You can hit back your service
self.hitYourService()
}
}
}
//MARK: Alamofire method to hit service, written in NetworkManager class
func hitPostServiceJsonForm(_ params:Dictionary<String,Any>, myReqURL:String, unReachable:(() -> Void),handler:#escaping ((Dictionary<String,Any>?) -> Void)) {
if networkReachable() == false {
unReachable()
}
var request = URLRequest(url: URL(string: myReqURL)!)
request.httpMethod = "POST"
request.setValue("application/json", forHTTPHeaderField: "Content-Type")
print_debug(object: "ReqParameter: \(String(describing: params))") // http url response
//JSONSerialization.data(withJSONObject: params, options: .prettyPrinted)
request.httpBody = try! JSONSerialization.data(withJSONObject: params, options: [])
Alamofire.request(request).responseJSON { response in
// SwiftLoader.hide()
print_debug(object: "Request: \(String(describing: response.request))") // original url request
print_debug(object: "Response: \(String(describing: response.response))") // http url response
print_debug(object: "Result: \(response.result)") // response serialization result
print_debug(object: "Result.value \(String(describing: response.result.value))")
switch response.result {
case .success:
if let jsonDict = response.result.value as? Dictionary<String,Any> {
print_debug(object: "Json Response: \(jsonDict)") // serialized json response
handler(jsonDict)
}
else{
handler(nil)
}
if let data = response.data, let utf8Text = String(data: data, encoding: .utf8) {
print("Server Response: \(utf8Text)") // original server data as UTF8 string
}
break
case .failure(let error):
handler(nil)
print_debug(object: error)
break
}
}
}