要使用RevalidatingServerAuthenticationStateProvider来持续检查令牌过期,需要进行以下步骤:
public class CustomAuthenticationStateProvider : RevalidatingServerAuthenticationStateProvider
{
private readonly IAccessTokenProvider _accessTokenProvider;
public CustomAuthenticationStateProvider(IAccessTokenProvider accessTokenProvider, ILoggerFactory loggerFactory)
: base(loggerFactory)
{
_accessTokenProvider = accessTokenProvider;
}
protected override TimeSpan RevalidationInterval => TimeSpan.FromMinutes(30);
protected override async Task ValidateAuthenticationStateAsync(AuthenticationState authenticationState, CancellationToken cancellationToken)
{
var accessToken = await _accessTokenProvider.GetAccessToken();
// 在此处使用自定义的逻辑验证令牌是否过期
// 返回true表示令牌有效,返回false表示令牌已过期
return true;
}
}
public void ConfigureServices(IServiceCollection services)
{
services.AddScoped();
services.AddScoped(sp => sp.GetRequiredService());
// 其他服务的注册...
}
@inject AuthenticationStateProvider AuthenticationStateProvider
@code {
private bool isTokenExpired = false;
protected override async Task OnInitializedAsync()
{
var authenticationState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
var user = authenticationState.User;
// 检查用户是否已经过期
isTokenExpired = user.Identity.IsAuthenticated && user.FindFirst("exp")?.Value < DateTimeOffset.Now.ToUnixTimeSeconds().ToString();
// 其他初始化逻辑...
}
}
通过这种方式,我们可以在Blazor Server端持续检查令牌过期,并根据需要执行相应的操作。