Testing the connection from client to server is essential when developing a client/server application.
The idea of this is to use a URLSession to send a request to the server and check if the return date string exists.
func checkConnection(completionHandler:@escaping (_ isOnline: Bool?) -> Void){
let stringurl = "http://" + "Your Server IP"
let url = NSURL(string: stringurl)
let task = URLSession.shared.dataTask(with: url! as URL) {(data, response, error) in
let httpResponse = response as? HTTPURLResponse
if (httpResponse?.allHeaderFields["Date"] as? String) != nil {
let isConnected = true
completionHandler(isConnected)
}else{
let isConnected = false
completionHandler(isConnected)
}
}
task.resume()
}
Usage: Put the code below into any function you want to use.
checkConnection { (isOnline) -> Void in
let status = isOnline!
DispatchQueue.main.async{
if status{
// Do something when connected
}else{
// Do something when disconnected
}
}
}
You can also use this idea to get server time data in swift. This is useful when you develop an application that needs time synchronization between the client and server. >>> See more.
