从 sign now REST API 获取访问令牌？

Question

我遵循了这个程序。 https://techlib.barracuda.com/CudaSign/RestEndpointsAPI

这是我获取访问令牌的 C# 代码。

        string userData = "username=email@domain.com&password=mypassword&grant_type=password";
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://signnow.mydomain.com/api/index.php/oauth2/token");
        request.Accept = "application/json";
        request.Method = "POST";
        request.ContentType = "application/x-www-form-urlencoded";
        request.Headers.Add("Authorization", "Basic " + userData);

        var response = request.GetResponse() as HttpWebResponse;

        if (response.StatusCode == HttpStatusCode.OK)
        {
               //JSON output.
        }

我得到以下错误：

      The remote server returned an error: (400) Bad Request.

我知道这是因为错误的模式。您现在可以帮我从 sign 获取访问令牌吗？

提前致谢！！！

cURL 请求：

string data = "username=email@domain.com&password=mypassword&grant_type=password";

 WebRequest myReq = WebRequest.Create(myURL + "oauth2/token");
 myReq.Method = "POST";
 //myReq.ContentLength = data.Length;
 myReq.ContentType = "application/x-www-form-urlencoded";

 UTF8Encoding enc = new UTF8Encoding();

//myReq.Headers.Add("Authorization", "Basic " + Convert.ToBase64String(enc.GetBytes(data)));
 myReq.Headers.Add("Authorization", "Basic " + data);
 WebResponse wr = myReq.GetResponse();

Answer 1

据我所知，用户数据应该在有效载荷内发送，而不是在 header Authorization 内发送。客户端凭据 (ENCODED_CLIENT_CREDENTIALS) 必须与您在 Barracuda 上的全局帐户相关联。

我建议您使用 curl 测试您的请求，因为该工具的文档使用它：

curl -H 'Authorization: Basic ENCODED_CLIENT_CREDENTIALS'
   --data 'username=user@test.com&password=test&grant_type=password&scope=user%20documents%20user%2Fdocumentsv2' https://capi-eval.signnow.com/api/oauth2/token

命令参数--data对应请求的payloadPOST.

要解决您的问题，您应该按如下所述更新您的代码：

string encodedUserCredentials = 
    Convert.ToBase64String(
       System.Text.ASCIIEncoding.ASCII.GetBytes("user:password")));
string userData = "username=email@domain.com&password=mypassword&grant_type=password";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://signnow.mydomain.com/api/index.php/oauth2/token");
request.Accept = "application/json";
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.Headers.Add("Authorization", "Basic " + encodedUserCredentials);

StreamWriter requestWriter = new StreamWriter(request.GetRequestStream());
requestWriter.Write(userData);
requestWriter.Close();

var response = request.GetResponse() as HttpWebResponse;

要知道要在变量 encodedUserCredentials 中放入什么（即 user 和 password 的值），请参阅此文档 https://techlib.barracuda.com/CudaSign/RestEndpointsAPI#，部分 "Security and Access Control" .

有关详细信息，请参阅这两个链接：

希望对你有帮助，蒂埃里

Answer 2

好的，这可能不是最优雅的解决方案，但我对这一切都是陌生的。另外，对于它在 vb 而不是 C#

中，我深表歉意

Public Class iqAPI
Public Shared Function postRequest(ByVal url As String, ByVal toSerialize As String, strHeader As String) As DataTable
    Dim wHeader As WebHeaderCollection = New WebHeaderCollection
    wHeader.Clear()
    wHeader.Add(strHeader)
    Dim wReq As WebRequest = WebRequest.Create(url)
    Dim postData As String = JsonConvert.SerializeObject(toSerialize)
    Dim byteArray As Byte() = Encoding.UTF8.GetBytes(postData)
    wReq.Headers = wHeader
    wReq.Method = "POST"
    wReq.ContentType = "application/x-www-form-urlencoded"
    wReq.ContentLength = byteArray.Length

Dim dataStream As Stream = wReq.GetRequestStream()
dataStream.Write(byteArray, 0, byteArray.Length)
dataStream.Close()

Dim wResp As WebResponse = wReq.GetResponse()

MsgBox(CType(wResp, HttpWebResponse).StatusDescription)
dataStream = wResp.GetResponseStream()
Using reader As New StreamReader(dataStream)
    Dim respFromServer As String = reader.ReadToEnd()
    Dim dtCudaClient As DataTable = JsonConvert.DeserializeObject(Of DataTable)("[" & respFromServer & "]")
    MsgBox(dtCudaClient.Rows(0).ToString)
    iqSTAMP.gvCudaClients.DataSource = dtCudaClient
    reader.Close()
    dataStream.Close()
    wResp.Close()
    Return dtCudaClient
End Using
Return Nothing
End Function

有几件事需要注意，我重载了它以使用对象而不是字符串来进行 toSerialize。似乎当您创建一个用户时，您必须以 json 格式使用它，并且当您获得令牌时，您使用上述方法按照您拥有的方式传递字符串。如果没有序列化为 json 的对象，我无法弄清楚创建用户。至于 Encoded_Client_Credentials，那是由 CudSign 提供的。我目前正在尝试弄清楚如何 POST 一个文件给他们，但运气不佳。希望你过得比我轻松。

Answer 3

var client = new RestClient("https://api-eval.signnow.com/oauth2/token");
var request = new RestRequest(Method.POST);
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddHeader("authorization", "Basic BASE64_ENCODED_CLIENT_ID:CLIENT_SECRET");
request.AddParameter("application/x-www-form-urlencoded", "username=EMAIL&password=PASSWORD&grant_type=password", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);

看来你打错了终点，但不是 100% 确定。我添加了对我有用的代码以获得正确的响应，减去一些次要信息。让我知道这是否有帮助，如果没有，我很乐意帮助您获得正确的答复。

旁注：如果之前的尝试可以保存任何内容，则可能需要清除缓存。

旁注：如果您获得不受限制的访问令牌，则无需指定范围。

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