c# - "The underlying connection was closed: An unexpected error occurred on a send."WebClient.OpenRead 错误(字符串链接)

Question

我遇到错误“基础连接已关闭:发送时发生意外错误。”在获取 google API 的返回数据时。
在本地很好，但我已经发布并上传到服务器，我遇到了那个错误。请帮帮我..最好的问候...

 WebClient webClient = new WebClient();
 Stream stream = webClient.OpenRead("https://www.googleapis.com/oauth2/v1/userinfo?access_token=[Access_Token]);
 string b;

/*I have not used any JSON parser because I do not want to use any extra dll/3rd party dll*/
 using (StreamReader br = new StreamReader(stream))
      {
         b = br.ReadToEnd();
      }

Answer 1

您的连接正在连接到 HTTPS 端点，它可能需要 TLS 1.2，这可能不是您客户端的默认 TLS 版本；这是对旧版本 .NET 的修复:

ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;