tag not being recognized in custom implementation

Question

I am trying to make custome authorization code in blazor. Based off previous stackoverflow posts I have contructed the following. My issue is that the tag is still not registering. I have:

public class MyServerAuthenticationStateProvider : AuthenticationStateProvider
{
    string UserId;
    string Password;
    bool IsAuthenticated = false;
    private ClaimsPrincipal claimsPrincipal;


    public void LoadUser(string _UserId, string _Password)
    {
        UserId = _UserId;
        Password = _Password;
    }


    public override async Task<AuthenticationState> GetAuthenticationStateAsync()
    {
        var userService = new UserService();

        var identity = IsAuthenticated
            ? new ClaimsIdentity(await userService.GetClaims(UserId))
            : new ClaimsIdentity();

        var result = new AuthenticationState(new ClaimsPrincipal(identity));
        return result;
    }
}

And:

 @page "/"
 @using BadgerWatchWeb.Services
 @inject AuthenticationStateProvider AuthenticationStateProvider

<h1>Sup</h1>


<AuthorizeView>
<Authorized>
    <h1>Hello, @context.User.Identity.Name!</h1>
    <p>You can only see this content if you're authenticated.</p>
</Authorized>
<NotAuthorized>
    <h1>Authentication Failure!</h1>
    <p>You're not signed in.</p>
</NotAuthorized>
<Authorizing>
    <h1>Authorizing</h1>
</Authorizing>
</AuthorizeView>


@code {
    [CascadingParameter] Task<AuthenticationState> authenticationStateTask { get; set; }

protected override async Task OnInitializedAsync()
{
    var myStateProvider = AuthenticationStateProvider as MyServerAuthenticationStateProvider;
   myStateProvider.LoadUser("mperry", "testtest");
   await myStateProvider.GetAuthenticationStateAsync();
}

}

I really need to know if this is the accepted way to do custom authentication in blazoe.

score 0 · Answer 1 · answered Aug 25 '19 at 03:59

You appear to have an error in your GetAuthenticationStateAsync method - it should be returning a Task:

public override async Task<AuthenticationState> GetAuthenticationStateAsync()
{
    var userService = new UserService();

    var identity = IsAuthenticated
        ? new ClaimsIdentity(await userService.GetClaims(UserId))
        : new ClaimsIdentity();

    var result = new AuthenticationState(new ClaimsPrincipal(identity));
    return Task.FromResult(result); //<<-- Note: Task.FromResult() here
}

Also, have a read through Authentication and Authorization for helpful information on custom authentication and authorization with Blazor, such as registering your custom authentication provider in ConfigureServices.

tag not being recognized in custom implementation

1 Answers1