send token to server Swift 3 - ios

Question

i'm trying to send a token to my server to check if token is still valid or has expired. the token value is pulled from saved data on the device. But no matter what i try it keeps giving me "missing token" which is the status message for when i've sent empty string.
// load content in user var
user = UserDefaults.standard.value(forKey: "parseJSON") as? NSDictionary
// if user is once logged in / register, keep him logged in
if user != nil {
print(user as Any)
let userToken = user!["token"] as? String
let url = NSURL(string: "http://fmm.dummy.com/api/v1/auth/me")!
var request = URLRequest(url: url as URL)
request.setValue("Bearer \(String(describing: userToken))", forHTTPHeaderField: "Authorization")
request.httpMethod = "POST"
When i edited and did this, the error message change to "invalid token" which meant i was sending something. it just wasn't correct
// load content in user var
user = UserDefaults.standard.value(forKey: "parseJSON") as? NSDictionary
// if user is once logged in / register, keep him logged in
if user != nil {
print(user as Any)
let userToken = user!["token"] as? String
let a: Character = "<"
let b: Character = ">"
let url = NSURL(string: "http://fmm.dummy.com/api/v1/auth/me")!
var request = URLRequest(url: url as URL)
request.setValue("Bearer .append\(a)\(String(describing: userToken)).append\(b)", forHTTPHeaderField: "Authorization")
request.httpMethod = "POST"
//launch session
URLSession.shared.dataTask(with: request) { data, response, error in
can someone please help me figure out what am doing wrong?
thanks
///EDIT
Hi when i edited as you had suggested and came up with this, i couldn't even print to console. Here is the full code for your consideration. Thanks for the response.
if let user = UserDefaults.standard.object(forKey: "parseJSON") as? [String:Any],
let userToken = user["token"] as? String {
let url = URL(string: "http://fmm.dummy.com/api/v1/auth/me")!
var request = URLRequest(url: url)
let tokenString = "Bearer " + userToken
request.setValue(tokenString, forHTTPHeaderField: "Authorization")
request.httpMethod = "POST"
//launch session
URLSession.shared.dataTask(with: request) { data, response, error in
//check if no error
if error == nil{
do {
let json = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
guard let parseJSON = json else{
print ("Error While Parsing")
return
}
print(parseJSON)
let statusMsg = parseJSON["status"] as? String
if statusMsg == "OK"{
//token still valid
self.login()
}else {
//token is invalid
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = parseJSON["status_msg"] as! String
appDelegate.infoView(message: message, color: colorSmoothRed)
})
}
}catch{
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = "\(error)"
appDelegate.infoView(message: message, color: colorSmoothRed)
})
return
}
}else{
// get main queue to communicate back to user
DispatchQueue.main.async(execute: {
let message = error!.localizedDescription
appDelegate.infoView(message: message, color: colorSmoothRed)
})
return
}
}.resume()
}
I'm trying to write code in appdelegate.swift that checks if the token saved from a previous login is still valid or has expired! the saved object on the user device is as follows. When i print user to the console i get this. ::--
Optional({
response = {
token = "eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJzdWIiOjIsImlzcyI6Imh0dHA6XC9cL3htbS54bW9iaWxlbW9uZXkuY29tXC9hcGlcL3YxXC9hdXRoIiwiaWF0IjoxNDk2ODUyNTkxLCJleHAiOjE0OTY4NTYxOTEsIm5iZiI6MTQ5Njg1MjU5MSwianRpIjoiOTFhYjE0MjZkMGZmN2RjZDVjOTQzNTlkZGY4OGY0ZmYifQ.WaQFprfRbJMDQ72IORtWrcSmUqY3EaJp5BAqjijvUAc";
verified = 1;
};
status = OK;
})

Answer 1

You are using too many optionals which can cause unexpected literal "Optional(<value>)" when calling the description method.
Unwrap all optionals safely with optional bindings:
if let user = UserDefaults.standard.object(forKey: "parseJSON") as? [String:Any],
let userToken = user["token"] as? String {
let url = URL(string: "http://fmm.dummy.com/api/v1/auth/me")!
var request = URLRequest(url: url)
let tokenString = "Bearer " + userToken
request.setValue(tokenString, forHTTPHeaderField: "Authorization")
request.httpMethod = "POST"
...
As always, never use valueForKey to get a single object from UserDefaults, use always objectForKey, and never use NSDictionary for a property list compliant dictionary, use always [String:Any].