调用HTTPS服务的问题

Posted 2021-11-06 xuexiaodong2009

调用HTTPS的服务需要处理安全协议，如果不处理就会提示安全协议错误

C#的处理代码如下

 private static string ChangehttpsTohttp(string URL)
        {
            if (string.IsNullOrEmpty(URL))
            {
                throw new Exception("hisURI错误，为=" + URL);
            }
            URL = URL.ToLower().TrimStart();
            if (URL.StartsWith("https"))
            {
                ServicePointManager.ServerCertificateValidationCallback += ValidateServerCertificate;
                try
                {      
                    ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls;
                    ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | (SecurityProtocolType)768 | (SecurityProtocolType)3072;
                }
                catch (Exception e)
                {/* 部分电脑的错误
                    System.NotSupportedException: The requested security protocol is not supported.
                    */
                    LogInfo.Error("https协议错误：hisURI" + URL, e);
                }
            }

            return URL;
        }

 private static bool ValidateServerCertificate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)
        {
            if(sslPolicyErrors!=SslPolicyErrors.None)
            {
                LogInfo.Error("https协议错误：sslPolicyErrors=" + sslPolicyErrors);
            }          
            return true;
        }