What is the best solution for a web login api in xamarin forms?

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What is the best solution for a web login api in xamarin forms?

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I have the following challenge to solve, I am developing an app using xamarin forms , this application will have to communicate with a website developed in PHP to consume your data, for all functions there is a GET json method that I can I can not use my web api , so for login this GET json does not exist, and there is the problem, how can I do this user validation and password if there is no function that can be used in my webservice ? ??? Remembering that it is not possible to create GET json for this login to the site, if there was this possibility the problem would be solved easily!

web-service asp.net-web-api xamarin-forms getjson

asked by anonymous 21.02.2018 / 16:45

1 answer

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score 0 · Answer 1

The only feasible exit was bypassing the system, hence my login page was as follows: LoginPage.xaml.cs

public partial class LoginPage : TabbedPage
    {
        public LoginPage()
        {
            InitializeComponent();
            NavigationPage.SetHasNavigationBar(this, false);

        }

        protected async void btnLogin_Clicked(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(emailEntry.Text))
            {
                await DisplayAlert("Erro", "Digite um usuário válido", "Aceitar");
                emailEntry.Focus();
                return;
            }

            if (string.IsNullOrEmpty(senhaEntry.Text))
            {
                await DisplayAlert("Erro", "Digite uma senha", "Aceitar");
                senhaEntry.Focus();
                return;
            }

            try
            {
                waitActivityIndicator.IsRunning = true;
                var loginRequest = new Login
                {
                    UserName = emailEntry.Text,
                    Password = senhaEntry.Text,
                };

                //invocar serviço


                waitActivityIndicator.IsRunning = false;
                Device.BeginInvokeOnMainThread(() => App.Current.MainPage = new MainPageRoot());
            }
            catch (Exception ex)
            {
                waitActivityIndicator.IsRunning = false;

                await DisplayAlert("Erro", "Usuário ou Senha Incorretos", "Aceitar");
            }
        }

    }

LoginService.cs

 public async void Logar(Login login)
        {



            var jsonRequest = JsonConvert.SerializeObject(login);
            var httpContent = new StringContent(jsonRequest, Encoding.UTF8, "application/json");
            var resp = string.Empty;

            try
            {
                var client = new HttpClient();
                client.BaseAddress = new Uri($"{BaseAddress}/_signin.php?usuario={login.UserName}&senha={login.Password}");
                var url = "";
                var result = await client.PostAsync(url, httpContent);

                if (!result.IsSuccessStatusCode)
                {
                    throw new Exception(result.RequestMessage.Content.ToString());
                }

                resp = await result.Content.ReadAsStringAsync();
                //verificar resposta do ws
                var user = JsonConvert.DeserializeObject<Colaborador>(resp);



            }
            catch (Exception)
            {
                throw;

            }

        }