How do I access HttpContext in Server-side Blazor?

Question

I need to access HttpContext in a page (.cshtml) and in particular a request and then a cookie. Despite available, HttpContextAccessor always has

Answer 1

It depends what you want to access the HttpContext for.

Should you want to access authentication or user info, consider using the AuthenticationStateProvider instead:

@page "/"
@using System.Security.Claims
@using Microsoft.AspNetCore.Components.Authorization
@inject AuthenticationStateProvider AuthenticationStateProvider

ClaimsPrincipal Data

Get ClaimsPrincipal Data

@_authMessage

@if (_claims.Count() > 0)
{
    

        @foreach (var claim in _claims)
        {
            
@claim.Type – @claim.Value
        }
    
}

@_surnameMessage

@code {
    private string _authMessage;
    private string _surnameMessage;
    private IEnumerable _claims = Enumerable.Empty();

    private async Task GetClaimsPrincipalData()
    {
        var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
        var user = authState.User;

        if (user.Identity.IsAuthenticated)
        {
            _authMessage = $"{user.Identity.Name} is authenticated.";
            _claims = user.Claims;
            _surnameMessage = 
                $"Surname: {user.FindFirst(c => c.Type == ClaimTypes.Surname)?.Value}";
        }
        else
        {
            _authMessage = "The user is NOT authenticated.";
        }
    }
}