远程服务器返回错误：(401) 未经授权。在WCF 4.0中调用rest服务生成令牌

Question

我正在尝试调用在邮递员中工作正常的休息服务来生成 OAuth 令牌，但是当我在 WCF 4.0 代码中尝试时，我收到错误

远程服务器返回错误：(401) 未经授权。

在这行代码

using (var response = (HttpWebResponse)request.GetResponse())

有人可以指导我解决这个问题吗？

这是我的完整代码：

public static string GetAccessToken(string tokenUrl, string clientId, string clientSecret, string grantType)
{
    try
    {
        ServicePointManager.Expect100Continue = true;
        ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;

        var request = (HttpWebRequest)WebRequest.Create(tokenUrl);

        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";

        // Prepare the data to post.
        var postData = @"client_id=" + Uri.EscapeDataString(clientId) + "&" +
                       @"client_secret " + Uri.EscapeDataString(clientSecret) + "&" +
                       @"grant_type=" + Uri.EscapeDataString(grantType);
        var byteArray = Encoding.UTF8.GetBytes(postData);

        using (var dataStream = request.GetRequestStream())
        {
            dataStream.Write(byteArray, 0, byteArray.Length);
        }

        using (var response = (HttpWebResponse)request.GetResponse())
        using (var reader = new StreamReader(response.GetResponseStream()))
        {
            string responseFromServer = reader.ReadToEnd();
            return responseFromServer;
        }
    }
    catch (Exception ex)
    {
        // Handle exceptions
        Console.WriteLine("Error: " + ex.Message);
        return null;
    }
}

Answer 1

问题已修复，client_secret后面缺少=并且client_secret开头有空格