[Blazor][Wasm] Topic for prerendering and auth

[javiercn]

Content

Steps for supporting auth + prerendering on Blazor applications.

• The app will prerender paths for which authorization is not required.
• Paths for which authorization is required will not be prerendered.

1. On your Client/Program.cs factor common service registrations into a separate method.
2. On your Server/Startup.cs register the services required for the UI and the applicaation to work.

services.AddScoped<AuthenticationStateProvider, ServerAuthenticationStateProvider>();
services.AddScoped<SignOutSessionStateManager>();

Client.Program.ConfigureCommonServices(services);

Replace endpoints.MapFallbackToFile("index.html") with endpoints.MapFallbackToPage("/_Host")
3. Create a _Host.cshtml page inside the pages directory, paste the contents from index.html into it and replace the <app>Loading...</app> tag with the following:

<app>
    @if (!HttpContext.Request.Path.StartsWithSegments("/authentication"))
    {
        <component type="typeof(Wasm.Authentication.Client.App)" render-mode="Static" />
    }
    else
    {
        <text>Loading...</text>
    }
</app>

[guardrex]

Duplicate of #17470 and resolved with #17420.

Live coverage 👉 https://docs.microsoft.com/en-us/aspnet/core/security/blazor/webassembly/?view=aspnetcore-3.1#support-prerendering-with-authentication

[MeysamMoghaddam]

how to handle api AuthenticationStateProvider in blazor wasm prerender .NET 5 Release Candidate 1 ?

and in Blazor WebAssembly prerendering :
dotnet/aspnetcore#26094

[MeysamMoghaddam]

how to handle api AuthenticationStateProvider in blazor wasm prerender .NET 5 Release Candidate 1 ?

and in Blazor WebAssembly prerendering :
dotnet/aspnetcore#26094

Tnx
Resolved This Issue:
in "app" component not work tag when use ApiAuthenticationStateProvider.
I used
`var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
var user = authState.User;

        if (!user.Identity.IsAuthenticated)
        {
        }

`
in OnAfterRenderAsync Method

[ChristianWeyer]

Do you have your sample and the solution somewhere available in Github? @MeysamMoghaddam ?