.net - 无法从 Azure 连接到 Nexmo API

Question

我的应用程序托管在云上(microsoft azure)，我正在尝试使用 https://api.nexmo.com/ni/basic/json?api_key=xxx&api_secret=xxxxxx&number= 验证手机号码，一切正常，然后突然我现在不再能够通过 azure 连接到 api，尽管我可以在本地连接到 api，但我收到此错误现有连接被远程主机强制关闭。我尝试将 TLS 更新到 V1.2，但我不断收到相同的错误。

这是我的代码:

string nexmoRes = Utilities.ReadGetHtmlPage("https://api.nexmo.com/ni/basic/json?api_key=xxxx&api_secret=xxx&number=" + InternationalMSISDN, "");

public static string ReadGetHtmlPage(string url, string str)
    {
        try
        {
            try
            {
                HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url);
                Utilities.writeLogs(System.Reflection.MethodInfo.GetCurrentMethod(), "url " + url);
                objRequest.Method = "GET";
                HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse();
                StreamReader sr;
                sr = new StreamReader(objResponse.GetResponseStream());
                return sr.ReadToEnd();
            }
            catch (Exception ex)
            {
                Utilities.WriteToText(ex);
                return "";
            }
        }
        catch (Exception ex)
        {
            Utilities.WriteToText(ex);
            return "";
        }
    }

Answer 1

在应用服务上尝试过，对我来说效果很好，请确保您的目标是 .NET 4.7 in your web.config或在 ServicePointManager 中明确选择 TLS 1.2，因为您的 Remote 仅支持 TLS 1.2 —

$ curl -i --tlsv1.0 "https://api.nexmo.com/ni/basic/json"
curl: (35) schannel: failed to receive handshake, SSL/TLS connection failed


$ curl -i --tlsv1.1 "https://api.nexmo.com/ni/basic/json"
curl: (35) schannel: failed to receive handshake, SSL/TLS connection failed


$ curl -i --tlsv1.2 "https://api.nexmo.com/ni/basic/json"
HTTP/1.1 200 OK
Server: nginx
...
{
  "status": 4,
  "status_message": "Invalid credentials"
}

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url);
...

如果您选择此路线，请注意 ServicePointManager.SecurityProtocol 的范围是您的整个应用程序域。

以 .NET 4.7 为目标，而不是修改 ServicePointManager 将把你带到这里，一个更好的地方 -

带有 Windows 工作线程的应用服务在 Windows Server 2016 上运行 -