Question

我的应用程序托管在云上（Microsoft Azure），我试图使用https://api.nexmo.com/ni/basic/json?api_key=xxx&api_secret=xxxxxx&number=验证手机号码，一切都正常工作，然后突然我现在不再能够通过Azure连接到api ，虽然我可以在本地连接到api，但是却出现此错误远程主机强行关闭了现有连接。我尝试将TLS更新到V1.2，但始终收到相同的错误。

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App Service上进行了尝试，对我来说效果很好，请确保您定位到.NET 4.7 in your web.config或在ServicePointManager中明确选择TLS 1.2，因为您的遥控器仅讲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);
...

如果您走这条路，请注意ServicePointManager.SecurityProtocol的范围是您的整个应用程序域。

定位.NET 4.7而不是修补ServicePointManager会带您到这里，这是个更好的地方-

带有Windows worker的应用程序服务在Windows Server 2016上运行-

无法从Azure连接到Nexmo API

1 个答案: