private async Task <bool> IsValid(string token, HttpContext context)
{
if (string.IsNullOrEmpty(token))
{
throw new ValidationException("Invalid token.");
}
if (DefaultToken.IsNotNullOrEmpty() && token == DefaultToken)
{
return(true);
}
ReadConfig(context);
using var httpClient = new HttpClient();
var stringAsync = await httpClient
.GetStringAsync(new Uri($"{CaptchaUri}?secret={SecretKey}&response={token}"))
.ConfigureAwait(false);
var serializerSettings = new JsonSerializerOptions
{
IgnoreNullValues = true
};
var captchaResponse = JsonSerializer.Deserialize <dynamic>(stringAsync, serializerSettings);
if (captchaResponse is null)
{
return(false);
}
if (captchaResponse.Success & AntiForgery && HostName.IsNotNullOrEmpty() &&
!captchaResponse.Hostname.Equals(HostName))
{
throw new ValidationException(
"Captcha hostname and request hostname do not match. Please review anti forgery settings.");
}
return(captchaResponse.Success);
}