topic Re: Generate Embed Token For Create Issue in Developer

Generate Embed Token For Create Issue

Zirochka — Thu, 27 Jul 2017 10:12:11 GMT

Hello.

I have an issue with getting embed token. I've done what's described in this link (https://powerbi.microsoft.com/en-us/documentation/powerbi-developer-walkthrough-push-data/) and everything works perfectly: datasets creates, tables creates and fills with data without any problems.

I have a task to embed a datasets (not reports) to web page and here I'm getting an error.

I found this page (https://microsoft.github.io/PowerBI-JavaScript/demo/v2-demo/index.html) which shows how embed report/dataset/dashboard/tile will look like. And on this page there is an embed token.

I googled a little and found this page (https://msdn.microsoft.com/library/mt784614.aspx) which describes the looks oh HTTP POST requests. I did the part for datasets. Here is my code example:

private static void generateEmbedToken()
        {
            // TokenCredentials Initializes a new instance of the
            // Microsoft.Rest.TokenCredentials class with
            // the given 'Bearer' token.
            var credentials = new TokenCredentials(token);
            // Initialize PowerBIClient with credentials
            var powerBIclient = new Microsoft.PowerBI.Api.V2.PowerBIClient(credentials)
            {
                // BaseUri is the api endpoint, default is https://api.powerbi.com
                BaseUri = new Uri("https://api.powerbi.com")
            };
            try
            {
                // Create body where accessLevel = View, datasetId = "" by default
                var requestParameters = new GenerateTokenRequest(TokenAccessLevel.Create, datasetId, true);
                // Generate EmbedToken This function sends the POST message
                //with all parameters and returns the token
                EmbedToken token = powerBIclient.Reports.GenerateTokenForCreate(requestParameters);
                embedToken = token.Token;
            }
            catch (Exception exc)
            {
                Console.WriteLine(exc.ToString());
            }
        }

and I got next issue:

Microsoft.Rest.HttpOperationException: Operation returned an invalid status code 'NotFound'
 at Microsoft.PowerBI.Api.V2.Reports.<GenerateTokenForCreateWithHttpMessagesAsync>d__8.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
 at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
 at Microsoft.PowerBI.Api.V2.ReportsExtensions.<GenerateTokenForCreateAsync>d__7.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
 at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
 at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
 at Microsoft.PowerBI.Api.V2.ReportsExtensions.GenerateTokenForCreate(IReports operations, GenerateTokenRequest requestParameters)
 at PushDataApp.Program.generateEmbedToken() in C:\Users\PC\Documents\Visual Studio 2017\Projects\PushDataApp\PushDataApp\Program.cs:line 388

line 388 here:

EmbedToken token = powerBIclient.Reports.GenerateTokenForCreate(requestParameters);

I don't know why it's happening.

I got this code from here (https://msdn.microsoft.com/library/mt784614.aspx), but I did some changes for my purposes (because I need dataset and not report).

I'll appreciate any help.

Re: Generate Embed Token For Create Issue

Eric_Zhang — Fri, 28 Jul 2017 08:04:00 GMT

@Zirochka

I may doubt that there's some issue with the Power BI API lib, as I've found the token generation functions for reports, dashboards, tiles but not for datasets.

powerBIclient.Reports.GenerateTokenxxxxx
powerBIclient.Dashboards.GenerateTokenxxxxx
powerBIclient.Tiles.GenerateTokenxxxxx

So I guess for Datasets, it should be 
powerBIclient.Datasets.GenerateTokenxxxxx
Unfortunately, I'm not finding any GenerateTokenxxxxx for datasets

Instead of using the API lib, call the REST API directly.

using System;
//Install-Package Newtonsoft.Json 
using Newtonsoft.Json;
using System.Net;
using System.IO;

namespace GenerateEmbeddedToken
{
    class Program
    {
        static void Main(string[] args)
        {
            string EmbedTokenForDataSet = generateEmbedTokenForDataSet("the groupID", "the datasetID", "eyxxxxxxxxxtoken");

            Console.WriteLine(EmbedTokenForDataSet);
            Console.ReadKey();
        }


        private static string generateEmbedTokenForDataSet(string groupID, string datasetID, string accessBearerToken)
        {
            string embedToken = "";
            HttpWebRequest request = System.Net.HttpWebRequest.CreateHttp(String.Format("https://api.powerbi.com/v1.0/myorg/groups/{0}/reports/GenerateToken", groupID));
            //POST web request to create a datasource.
            request.KeepAlive = true;
            request.Method = "POST";
            request.ContentType = "application/json";
             
            //Add token to the request header
            request.Headers.Add("Authorization", String.Format("Bearer {0}", accessBearerToken));

            string PostData = "{"+
                                      "\"accessLevel\": \"Create\","+
                                      "\"datasetId\": \""+datasetID+"\","+
                                      "\"allowSaveAs\": true"+
                                    "}";

            byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(PostData); 

            try
            {
                //Write JSON byte[] into a Stream
                using (Stream writer = request.GetRequestStream())
                {
                    writer.Write(byteArray, 0, byteArray.Length);
                    var response = (HttpWebResponse)request.GetResponse(); 
                    var responseJson = new StreamReader(response.GetResponseStream()).ReadToEnd();
                    dynamic responseString = JsonConvert.DeserializeObject<dynamic>(responseJson.ToString());
                    embedToken = responseString["token"];
                }
            }
            catch (WebException wex)
            {
                if (wex.Response != null)
                {
                    using (var errorResponse = (HttpWebResponse)wex.Response)
                    {
                        using (var reader = new StreamReader(errorResponse.GetResponseStream()))
                        {
                            string errorString = reader.ReadToEnd();
                            dynamic respJson = JsonConvert.DeserializeObject<dynamic>(errorString);
                            Console.WriteLine(respJson.toString());
                            //TODO: use JSON.net to parse this string and look at the error message
                        }
                    }
                }
            }

            return embedToken;
        }
    }
}

Re: Generate Embed Token For Create Issue

Zirochka — Mon, 31 Jul 2017 08:19:58 GMT

I tried to use your function, but it didn't help.

using System;
//Install-Package Newtonsoft.Json 
using Newtonsoft.Json;
using System.Net;
using System.IO;

namespace GenerateEmbeddedToken
{
    class Program
    {
        static void Main(string[] args)
        {
            string EmbedTokenForDataSet = generateEmbedTokenForDataSet("the groupID", "the datasetID", "eyxxxxxxxxxtoken");

            Console.WriteLine(EmbedTokenForDataSet);
            Console.ReadKey();
        }


        private static string generateEmbedTokenForDataSet(string groupID, string datasetID, string accessBearerToken)
        {
            string embedToken = "";
            HttpWebRequest request = System.Net.HttpWebRequest.CreateHttp(String.Format("https://api.powerbi.com/v1.0/myorg/groups/{0}/reports/GenerateToken", groupID));
            //POST web request to create a datasource.
            request.KeepAlive = true;
            request.Method = "POST";
            request.ContentType = "application/json";
             
            //Add token to the request header
            request.Headers.Add("Authorization", String.Format("Bearer {0}", accessBearerToken));

            string PostData = "{"+
                                      "\"accessLevel\": \"Create\","+
                                      "\"datasetId\": \""+datasetID+"\","+
                                      "\"allowSaveAs\": true"+
                                    "}";

            byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(PostData); 

            try
            {
                //Write JSON byte[] into a Stream
                using (Stream writer = request.GetRequestStream())
                {
                    writer.Write(byteArray, 0, byteArray.Length);
                    var response = (HttpWebResponse)request.GetResponse(); 
                    var responseJson = new StreamReader(response.GetResponseStream()).ReadToEnd();
                    dynamic responseString = JsonConvert.DeserializeObject<dynamic>(responseJson.ToString());
                    embedToken = responseString["token"];
                }
            }
            catch (WebException wex)
            {
                if (wex.Response != null)
                {
                    using (var errorResponse = (HttpWebResponse)wex.Response)
                    {
                        using (var reader = new StreamReader(errorResponse.GetResponseStream()))
                        {
                            string errorString = reader.ReadToEnd();
                            dynamic respJson = JsonConvert.DeserializeObject<dynamic>(errorString);
                            Console.WriteLine(respJson.toString());
                            //TODO: use JSON.net to parse this string and look at the error message
                        }
                    }
                }
            }

            return embedToken;
        }
    }
}

On line:

using (Stream writer = request.GetRequestStream())

program thinks for approximately 30 seconds and then goes to catch block.

In catch block if statement is false (so, Response == null) and program just goes out from catch.

That's all.

I still don't understant why it happens because I just use this guide for POST requests (https://msdn.microsoft.com/library/mt784614.aspx). And it's up to date (Updated: July 21, 2017), so, I don't understand.

I'll appresiate any help.

Re: Generate Embed Token For Create Issue

Eric_Zhang — Mon, 31 Jul 2017 09:36:07 GMT

@Zirochka wrote:

I tried to use your function, but it didn't help.

using System;
//Install-Package Newtonsoft.Json 
using Newtonsoft.Json;
using System.Net;
using System.IO;

namespace GenerateEmbeddedToken
{
    class Program
    {
        static void Main(string[] args)
        {
            string EmbedTokenForDataSet = generateEmbedTokenForDataSet("the groupID", "the datasetID", "eyxxxxxxxxxtoken");

            Console.WriteLine(EmbedTokenForDataSet);
            Console.ReadKey();
        }


        private static string generateEmbedTokenForDataSet(string groupID, string datasetID, string accessBearerToken)
        {
            string embedToken = "";
            HttpWebRequest request = System.Net.HttpWebRequest.CreateHttp(String.Format("https://api.powerbi.com/v1.0/myorg/groups/{0}/reports/GenerateToken", groupID));
            //POST web request to create a datasource.
            request.KeepAlive = true;
            request.Method = "POST";
            request.ContentType = "application/json";
             
            //Add token to the request header
            request.Headers.Add("Authorization", String.Format("Bearer {0}", accessBearerToken));

            string PostData = "{"+
                                      "\"accessLevel\": \"Create\","+
                                      "\"datasetId\": \""+datasetID+"\","+
                                      "\"allowSaveAs\": true"+
                                    "}";

            byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(PostData); 

            try
            {
                //Write JSON byte[] into a Stream
                using (Stream writer = request.GetRequestStream())
                {
                    writer.Write(byteArray, 0, byteArray.Length);
                    var response = (HttpWebResponse)request.GetResponse(); 
                    var responseJson = new StreamReader(response.GetResponseStream()).ReadToEnd();
                    dynamic responseString = JsonConvert.DeserializeObject<dynamic>(responseJson.ToString());
                    embedToken = responseString["token"];
                }
            }
            catch (WebException wex)
            {
                if (wex.Response != null)
                {
                    using (var errorResponse = (HttpWebResponse)wex.Response)
                    {
                        using (var reader = new StreamReader(errorResponse.GetResponseStream()))
                        {
                            string errorString = reader.ReadToEnd();
                            dynamic respJson = JsonConvert.DeserializeObject<dynamic>(errorString);
                            Console.WriteLine(respJson.toString());
                            //TODO: use JSON.net to parse this string and look at the error message
                        }
                    }
                }
            }

            return embedToken;
        }
    }
}

On line:

using (Stream writer = request.GetRequestStream())

program thinks for approximately 30 seconds and then goes to catch block.

In catch block if statement is false (so, Response == null) and program just goes out from catch.

That's all.

I'll appresiate any help.

@Zirochka

Have you got any API console tool for testing purpose? If not, I'd suggest using POSTMAN.

So beforing coding in C#, can you test this GenerateToken in postman? For any issue, feel free to post.

Re: Generate Embed Token For Create Issue

Zirochka — Mon, 31 Jul 2017 10:55:43 GMT

Thanks for this Postman. It's really useful tool. Thanks a lot.

I tried to sent in this postman post request (from here https://msdn.microsoft.com/library/mt784614.aspx for dataset) and I got an answer with embed token. I checked this token here (https://microsoft.github.io/PowerBI-JavaScript/demo/v2-demo/index.html) and it works. Dataset loads to this example.

But I don't understand why from C# it doesn't works.

In my code I have another POST requests: when I create dataset (first POST) and when I push data to the dataset (second POST). And they works perfectly (I checked hundred times). But this (when I get embed token) POST (it's third POST in my code) does't work. And I found out that API works fine (thanks to postman).

Do you have any idea?

I'll appreciate any help.

Re: Generate Embed Token For Create Issue

Eric_Zhang — Thu, 10 Aug 2017 01:57:09 GMT

@Zirochka wrote:

Thanks for this Postman. It's really useful tool. Thanks a lot.

I tried to sent in this postman post request (from here https://msdn.microsoft.com/library/mt784614.aspx for dataset) and I got an answer with embed token. I checked this token here (https://microsoft.github.io/PowerBI-JavaScript/demo/v2-demo/index.html) and it works. Dataset loads to this example.

But I don't understand why from C# it doesn't works.

In my code I have another POST requests: when I create dataset (first POST) and when I push data to the dataset (second POST). And they works perfectly (I checked hundred times). But this (when I get embed token) POST (it's third POST in my code) does't work. And I found out that API works fine (thanks to postman).

Do you have any idea?

I'll appreciate any help.

@Zirochka

I'd say the C# code in my first indeed works as long as the groupid and datesetid are correct. In your case, as the generate embedtoken POST request works in POSTMAN, so I think you could debug your code and figure it out.

As to your "another POST requests", this is one issue as I tested in this thread and you can use the workaround from orginal poster.