Unable to get access_token and refresh_token from API

API Q&A
1

Team,

I’m using below code to call infusionsoft API to get refresh token but getting error “The remote server returned an error: (400) Bad Request.”

Please have a look into my code and provide a solution to get access_token and refresh_token.

Here is my code

public static void Auth()
{
string RefreshToken = “”, DeveloperAppKey= “”, DeveloperAppSecret= “”;
string tokenUrl = “https://api.infusionsoft.com/token?grant_type=refresh_token&refresh_token=” +
RefreshToken;

        HttpWebRequest request = HttpWebRequest.Create(tokenUrl) as HttpWebRequest;
        request.Method = "POST";
        request.KeepAlive = true;
        request.ContentType = "application/x-www-form-urlencoded";
        try
        {
            string authorizationHeaderText =
                Convert.ToBase64String(Encoding.UTF8.GetBytes(DeveloperAppKey + ":" + DeveloperAppSecret));
            request.Headers[HttpRequestHeader.Authorization] = "Basic " + authorizationHeaderText;

            string resultJSON = string.Empty;
            using (WebResponse response = request.GetResponse())
            {
                var sr = new StreamReader(response.GetResponseStream());
                resultJSON = sr.ReadToEnd();
                sr.Close();
            }

            var jsonSerializer = new JavaScriptSerializer();

            //var tokenData = jsonSerializer.Deserialize<TokenData>(resultJSON);

            Console.WriteLine(resultJSON);
        }
        catch (Exception exception)
        {
            Console.WriteLine(exception);
        }
        finally
        {
            Console.ReadLine();
        }
    }

Its urgent , please help.

Thanks

2

You can’t send the grant_type and refresh_token as query params. The need to be posted in the body.

3

Made the changes , but still getting bad request.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Web;
using System.Web.Script.Serialization;

namespace InfusionSoftApp.Models
{
public class ClassToken
{
public static void Auth()
{
string RefreshToken = “", DeveloperAppKey= "", DeveloperAppSecret= "********************************”;
string tokenUrl = “https://api.infusionsoft.com/token”;

        HttpWebRequest request = HttpWebRequest.Create(tokenUrl) as HttpWebRequest;
        request.Method = "POST";
        request.KeepAlive = true;
        request.ContentType = "application/x-www-form-urlencoded";
        //request.ContentLength = 1;
        try
        {
            RefreshToken refmodel = new RefreshToken();
            refmodel.grant_type = "refresh_token";
            refmodel.refresh_token = "*********************";
            string inputJsontag = (new JavaScriptSerializer()).Serialize(refmodel);
            
            string authorizationHeaderText =
                Convert.ToBase64String(Encoding.UTF8.GetBytes(DeveloperAppKey + ":" + DeveloperAppSecret));
            request.Headers[HttpRequestHeader.Authorization] = "Basic " + authorizationHeaderText;

            using (var streamWriter = new StreamWriter(request.GetRequestStream()))
            {
                streamWriter.Write(refmodel);
            }

            var httpResponse = (HttpWebResponse)request.GetResponse();
            using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
            {
                var result = streamReader.ReadToEnd();
            }
            var jsonSerializer = new JavaScriptSerializer();
        }
        catch (Exception exception)
        {
            Console.WriteLine(exception);
        }
        finally
        {
            Console.ReadLine();
        }
    }
}

}

Please reply with working code.
Thanks

4

If you are still getting the same error of missing the content length, then you need to the send that header. Have you looked the docs for HttpWebRequest? HttpWebRequest.ContentLength Property (System.Net) | Microsoft Docs

You are not setting this header which makes it an invalid http request.

5

public static void Auth()
{
string RefreshToken = “********************”, DeveloperAppKey= “”, DeveloperAppSecret= “”;
string tokenUrl = “https://api.infusionsoft.com/token”;

        HttpWebRequest request = HttpWebRequest.Create(tokenUrl) as HttpWebRequest;
        request.Method = "POST";
        request.KeepAlive = true;
        request.ContentType = "application/x-www-form-urlencoded";
       
        string postData = "grant_type=refresh_token&refresh_token=*****************"; //+ inputData;
        ASCIIEncoding encoding = new ASCIIEncoding();
        byte[] byte1 = encoding.GetBytes(postData);
        request.ContentLength = byte1.Length;
        try
        {
            string authorizationHeaderText =
                Convert.ToBase64String(Encoding.UTF8.GetBytes(DeveloperAppKey + ":" + DeveloperAppSecret));
            request.Headers[HttpRequestHeader.Authorization] = "Basic " + authorizationHeaderText;
            Stream newStream = request.GetRequestStream();

            newStream.Write(byte1, 0, byte1.Length);
            // Close the Stream object.
            newStream.Close();
            WebResponse response = request.GetResponse();
            //var httpResponse = (HttpWebResponse)request.GetResponse();               

        }
        catch (Exception exception)
        {
            Console.WriteLine(exception);
        }
    }
}

with reference to above link, modified the code but i dont understand what i am doing wrong because it still bad request. :slightly_frowning_face:

6

Are you getting the same error?