My current problem when I have a page set to InteractiveServer as the render mode, I can not get access to httpContext.User.Identity.Name as only SSR allows access to httpContext. I have found some explanations for workarounds in .net 6 blazor server app that I have struggled to process and apply to .net 8 blazor web app I am on.

I would like to be able to inject a service for username as AddScoped so each new session can have a distinct Windows user name for processing what they should have access to.

Where in blazor .net 8 is start up first render so I can create the Http context at that instant and have it never be overwritten as null once singalR takes over communication?

I hope this is clear as this is my first endeavor into blazor and ASP.net core as a whole. I am attempting to get my workplace to move off of aspx webforms into a more modern practice.

Let me know if my goal makes sense or if there is better ways to access Windows Authentication.

Break down:

I have enabled windows authentication on IIS.

In my program.cs I have added

//For windows authentication 
//---------------------
//First add nuget package Microsoft.AspNetCore.Authentication.Negotiat
builder.Services.AddAuthentication(NegotiateDefaults.AuthenticationScheme)
   .AddNegotiate();

builder.Services.AddAuthorization(options =>
{
    options.FallbackPolicy = options.DefaultPolicy;
});
///
app.UseAuthentication();
app.UseAuthorization();
///

I inject a service that is meant to pass the Windows user name to the pages I would like to have it on

//Inject IHttpContextAccessor
builder.Services.AddHttpContextAccessor();
//injects
builder.Services.AddScoped<UserService>();
//

Here is my User service

public class UserService
{
    //Properties
    public User CurrentUser { get; set; }

    private readonly IHttpContextAccessor _httpContextAccessor;

    //Constructors
    public UserService(IHttpContextAccessor httpContextAccessor)
    {
        _httpContextAccessor = httpContextAccessor;
        CurrentUser = new User(GetWindowsUserName());
    }


    //Methods

    /// <summary>
    /// Only supported on Windows platforms
    /// Gets the current windows login of the user
    /// </summary>
    /// <returns>Bool base on if we successfully got user name</returns>
    [System.Runtime.Versioning.SupportedOSPlatform("windows")]
    private string GetWindowsUserName()
    {
        string? userName = null;

        try
        {
            var httpContext = _httpContextAccessor.HttpContext;
            if (httpContext != null && httpContext.User.Identity.IsAuthenticated)
            {
                userName = httpContext.User.Identity.Name;
                userName = userName?.Remove(0, 4);
            }

        }
        catch
        {
            userName = "";
        }

        return userName;
    }
}

on my @page

//RENDER MODE CREATING HTTP ISSUE
@rendermode @(new InteractiveServerRenderMode(false))


@code
{
[Inject] public required UserService UserService { get; set; }
protected override void OnInitialized()
{
    _userName = (UserService.CurrentUser.UserName == null) ?
        "empty" : UserService.CurrentUser.UserName;

}
}

The issue is here with AddScoped for userService when render mode is interactive httpcontext will be null in my user service. If I use add singleton I can get access to the user service info but it will be the same for all my users based on the first user.