private async Task <AuthenticationScheme> GetDynamicSchemeAsync(string name)
{
if (_httpContextAccessor.HttpContext == null)
{
_logger.LogDebug("IAuthenticationSchemeProvider being used outside HTTP request, therefore dynamic provider feature can't be used for loading scheme: {scheme}.", name);
return(null);
}
// these have to be here because the regular authentication middleware accepts IAuthenticationSchemeProvider
// as a ctor param, not an Invoke param, which makes it a singleton. Our DynamicAuthenticationSchemeCache
// and possibly the store is scoped in DI.
var cache = _httpContextAccessor.HttpContext.RequestServices.GetRequiredService <DynamicAuthenticationSchemeCache>();
var store = _httpContextAccessor.HttpContext.RequestServices.GetRequiredService <IIdentityProviderStore>();
var dynamicScheme = cache.Get(name);
if (dynamicScheme == null)
{
var idp = await store.GetBySchemeAsync(name);
if (idp != null && idp.Enabled)
{
var providerType = _options.FindProviderType(idp.Type);
if (providerType != null)
{
LicenseValidator.ValidateDynamicProviders();
dynamicScheme = new DynamicAuthenticationScheme(idp, providerType.HandlerType);
cache.Add(name, dynamicScheme);
}
}
}
return(dynamicScheme);
}
