.Net Core 下 AWSSDK 中HTTPS请求的问题

亚马逊S3的库在连接Https的对象存储时会返回：

The remote certificate is invalid according to the validation procedure

之前在.Net Framework中可以使用如下方式绕过SSL的验证：

ServicePointManager.ServerCertificateValidationCallback
                       += RemoteCertificateValidate;

private static bool RemoteCertificateValidate(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
     //TLS证书验证，直接返回成功
     return true;
}

但是这个方法在.Net Core中已经不管用了，在.Net Core中需要这样来处理:

public class HttpClientFactoryAcceptAllSSL : Amazon.Runtime.HttpClientFactory
{
        public override HttpClient CreateHttpClient(Amazon.Runtime.IClientConfig clientConfig)
        {
            System.Net.Http.HttpClientHandler handler = new System.Net.Http.HttpClientHandler();
            handler.ServerCertificateCustomValidationCallback = System.Net.Http.HttpClientHandler.DangerousAcceptAnyServerCertificateValidator;
            return new HttpClient(handler);
        }
}

AmazonS3Config config = new AmazonS3Config();
config.ServiceURL = settings_.Value.OOS.ServiceURL;
config.BufferSize = 100 * 1024;
config.ForcePathStyle = true;
config.Timeout = new TimeSpan(1, 0, 0);
config.SignatureVersion = "2";
config.HttpClientFactory = new HttpClientFactoryAcceptAllSSL();

AmazonS3Client client = new AmazonS3Client(settings_.Value.OOS.AccessKeyId, settings_.Value.OOS.SecretAccessKey, config);