So I have some Swift code that send a request to my local host

//
//  ContentView.swift
//  Shared
//
//  Created by Ulto4 on 10/23/21.
//

import SwiftUI

struct ContentView: View {
    var body: some View {
        VStack{
        Text("Hello, world!")
            .padding()
        Button(action : {
            self.fu()
        }, label: {
            Image(systemName: "pencil").resizable().aspectRatio(contentMode:.fit)
        })
    }
    }
    func fu(){
        let url = URL(string: "http://127.0.0.1:5000/232")

           

           guard let requestUrl = url else { fatalError() }



           
           var request = URLRequest(url: requestUrl)



         

           request.httpMethod = "GET"



      

           let task = URLSession.shared.dataTask(with: request) { (data, response, error) in

               

              

               if let error = error {

                   print("Error took place \(error)")

                   return

               }

               

              

               if let response = response as? HTTPURLResponse {

                   print("Response HTTP Status code: \(response.statusCode)")

               }
            
        }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
   
        
    }

}

However, on my Flask app there are no get requests coming in and the function isn't running. There also isn't anything printing to the console. I am fairly new to swift so I don't really know how to fix this. Is there any other way to send requests in swift, if not, How would I fix this?

CodePudding user response：

You are creating the URLSessionDataTask, but you never start it. Call task.resume().

Longer term, you might consider using Combine, e.g., dataTaskPublisher. Combine fits well into SwiftUI patterns.

CodePudding user response：

If you are using swift 5.5, you could try the following approach. Note the https (see also: Transport security has blocked a cleartext HTTP ).

import SwiftUI

@main
struct TestApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

struct ContentView: View {
    var body: some View {
      Text("testing")
        .task {
            let theData: Data? = await getData()
            print("---> theData: \(theData)")
        }
    }
    
    // send a request to your local host
    func getData() async -> Data? {
        // note the https not http, and use ! only for testing
        let url = URL(string: "https://127.0.0.1:5000/232")! 
        do {
            let (data, response) = try await URLSession.shared.data(for: URLRequest(url: url))
            guard let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode == 200 else {
                print(URLError(.badServerResponse))
                return nil
            }
            return data
        }
        catch {
            return nil
        }
    }
    
}