Tuve el mismo problema con una aplicación ASP.NET MVC Core de una sola página. Lo resolví configurando HttpContext.Usertodas las acciones del controlador que cambian las declaraciones de identidad actuales (ya que MVC solo hace esto para solicitudes posteriores, como se explica aquí ). Utilicé un filtro de resultados en lugar de middleware para agregar las cookies antiforgery a mis respuestas, lo que se aseguró de que solo se generaran después de que la acción MVC hubiera regresado.
Controlador (Nota: estoy administrando usuarios con ASP.NET Core Identity):
[Authorize]
[ValidateAntiForgeryToken]
public class AccountController : Controller
{
private SignInManager<IdentityUser> signInManager;
private UserManager<IdentityUser> userManager;
private IUserClaimsPrincipalFactory<IdentityUser> userClaimsPrincipalFactory;
public AccountController(SignInManager<IdentityUser> signInManager, UserManager<IdentityUser> userManager, IUserClaimsPrincipalFactory<ApplicationUser> userClaimsPrincipalFactory)
{
this.signInManager = signInManager;
this.userManager = userManager;
this.userClaimsPrincipalFactory = userClaimsPrincipalFactory;
}
[HttpPost]
[AllowAnonymous]
public async Task<IActionResult> Login(string username, string password)
{
if (username == null || password == null)
{
return BadRequest(); // Alias of 400 response
}
var result = await signInManager.PasswordSignInAsync(username, password, false, lockoutOnFailure: false);
if (result.Succeeded)
{
var user = await userManager.FindByNameAsync(username);
// Must manually set the HttpContext user claims to those of the logged
// in user. Otherwise MVC will still include a XSRF token for the "null"
// user and token validation will fail. (MVC appends the correct token for
// all subsequent reponses but this isn't good enough for a single page
// app.)
var principal = await userClaimsPrincipalFactory.CreateAsync(user);
HttpContext.User = principal;
return Json(new { username = user.UserName });
}
else
{
return Unauthorized();
}
}
[HttpPost]
public async Task<IActionResult> Logout()
{
await signInManager.SignOutAsync();
// Removing identity claims manually from the HttpContext (same reason
// as why we add them manually in the "login" action).
HttpContext.User = null;
return Json(new { result = "success" });
}
}
Filtro de resultados para agregar cookies antiforgery:
public class XSRFCookieFilter : IResultFilter
{
IAntiforgery antiforgery;
public XSRFCookieFilter(IAntiforgery antiforgery)
{
this.antiforgery = antiforgery;
}
public void OnResultExecuting(ResultExecutingContext context)
{
var HttpContext = context.HttpContext;
AntiforgeryTokenSet tokenSet = antiforgery.GetAndStoreTokens(context.HttpContext);
HttpContext.Response.Cookies.Append(
"MyXSRFFieldTokenCookieName",
tokenSet.RequestToken,
new CookieOptions() {
// Cookie needs to be accessible to Javascript so we
// can append it to request headers in the browser
HttpOnly = false
}
);
}
public void OnResultExecuted(ResultExecutedContext context)
{
}
}
Extracto de Startup.cs:
public partial class Startup
{
public Startup(IHostingEnvironment env)
{
//...
}
public IConfigurationRoot Configuration { get; }
public void ConfigureServices(IServiceCollection services)
{
//...
services.AddAntiforgery(options =>
{
options.HeaderName = "MyXSRFFieldTokenHeaderName";
});
services.AddMvc(options =>
{
options.Filters.Add(typeof(XSRFCookieFilter));
});
services.AddScoped<XSRFCookieFilter>();
//...
}
public void Configure(
IApplicationBuilder app,
IHostingEnvironment env,
ILoggerFactory loggerFactory)
{
//...
}
}