c# - 尝试下载 osu! 时如何修复 "The SSL connection could not be established, see inner exception."化身

Question

我要下载osu!头像使用它们，但不断收到此错误:

The SSL connection could not be established.

内部异常是:

System.Net.Http.HttpRequestException: The SSL connection could not be established, see inner exception. ---> System.Security.Authentication.AuthenticationException: Authentication failed, see inner exception. ---> System.ComponentModel.Win32Exception: Получено непредвиденное сообщение или оно имеет неправильный формат

示例网址: https://a.ppy.sh/10638551?1524507784.png

我尝试使用 HttpClient 和 WebClient 但没有成功。

using(HttpClient client = new HttpClient())
{
     var resp = await client.GetAsync("https://a.ppy.sh/10638551?1547998515.jpeg");
     var responseStr = await resp.Content.ReadAsStringAsync();
     File.WriteAllText("html/avatars/avatar.jpeg", responseStr);
}

Answer 1

我找到了这个博客帮助我的解决方案

ServicePointManager.ServerCertificateValidationCallback += (sender, certificate, chain, errors) =>
{
    // local dev, just approve all certs
    if (development) return true;
    return errors == SslPolicyErrors.None ;
};

https://www.khalidabuhakmeh.com/validate-ssl-certificate-with-servicepointmanager