无法获取访问令牌和刷新令牌

Question

所有 ClientID, ClientSecret & RedirectURI 放在 web.config.

<appSettings>      
    <add key="redirectURI" value="http://localhost:55593/oauthplayground" />
    <add key="clientId" value="uX4YpHHNm****ltekoG" />
    <add key="clientSecret" value="K5cSv3izT1GZ9PXnaWWfRWbTv10*****O3JkYFMlWMF3FhBtjyk0FqJduGJZSAL7B1DngJyxgX3KKNSD0Bqdv" />    
</appSettings>

现在我从这里得到了验证码。

static string redirectURI = ConfigurationManager.AppSettings["redirectURI"];
static string clientID = ConfigurationManager.AppSettings["clientID"];
static string clientSecret = ConfigurationManager.AppSettings["clientSecret"];

protected void btnclick_Click(object sender, EventArgs e)
{
    Response.Redirect(String.Format("https://d****o.com/o/authorize/?response_type=code&client_id={0}&redirect_uri={1}", clientID, redirectURI));
}

然后我得到了我的授权码：

3Q8tvb9d0fj232NZZIAIaItUIqtAd7

（我将此代码存储在标签中，即 lblcode.Text）

然后对于 Access_token 和刷新令牌，我使用此代码：

protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                if (Request.QueryString.Get("code") != null)
                {     string AccessToken = string.Empty;  
                    lblcode.Text = Request.QueryString["code"].ToString();
                    string RefreshToken = ExchangeAuthorizationCode(lblcode.Text, out AccessToken);

                }
            }
        }

   private string ExchangeAuthorizationCode(string code, out string accessToken)
    {
        accessToken = string.Empty;
        string ClientSecret = clientSecret;
        string ClientId = clientID;
        //get this value by opening your web app in browser.    
        string RedirectUrl = redirectURI;
        var Content = "code=" + code + "&client_id=" + ClientId + "&client_secret=" + ClientSecret + "&redirect_uri=" + RedirectUrl + "&grant_type=authorization_code";
        var request = WebRequest.Create("https://drchrono.com/o/token/");
        request.Method = "POST";
        request.AuthenticationLevel = System.Net.Security.AuthenticationLevel.MutualAuthRequired;

        byte[] byteArray = Encoding.UTF8.GetBytes(Content);
        request.ContentType = "application/x-www-urlencoded";
        request.ContentLength = byteArray.Length;
        //ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;
        //System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
        //ServicePointManager.ServerCertificateValidationCallback = (snder, cert, chain, error) => true;
        using (Stream dataStream = request.GetRequestStream())
        {
            dataStream.Write(byteArray, 0, byteArray.Length);
            dataStream.Close();
        }
        var Response = (HttpWebResponse)request.GetResponse();
        Stream responseDataStream = Response.GetResponseStream();
        StreamReader reader = new StreamReader(responseDataStream);
        string ResponseData = reader.ReadToEnd();
        reader.Close();
        responseDataStream.Close();
        Response.Close();
        if (Response.StatusCode == HttpStatusCode.OK)
        {
            var ReturnedToken = JsonConvert.DeserializeObject<Token>(ResponseData);
            if (ReturnedToken.refresh_token != null)
            {
                accessToken = ReturnedToken.access_token;
                return ReturnedToken.refresh_token;
            }
            else
            {
                return null;
            }
        }
        else
        {
            return string.Empty;
        }
    }

但是我收到一个错误：

The request was aborted: Could not create SSL/TLS secure channel.

注:

使用 POSTMAN，我获得了所有数据。这意味着所有 API 都在工作正确。
List item Comment in the Code，我用了那些但是同样的问题发生。
我还用 IISCrypto.exe 检查了我的系统，其中我可以看到我所有的服务器，客户端协议（SSL 2.0，SSL 3.0，TLS 1.0， TLS 1.1、TLS 1.2) 已启用。

Answer 1

把这段代码放在上面

ServicePointManager.Expect100Continue = true;
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;

下面的代码。
var request = WebRequest.Create("https://drchrono.com/o/token/");'

无法获取访问令牌和刷新令牌

Unable to get Access token and Refresh token

c#

asp.net

restsharp

oauth-2.0

asp.net-web-api