I am not able to get new access token using refresh token
*ERROR : The remote server returned an error: (400) Bad Request.*
public static string PostMethod(string baseAddress, string data)
{
try
{
HttpWebRequest request = HttpWebRequest.Create(baseAddress) as
HttpWebRequest;
string result = null;
request.Method = "POST";
request.KeepAlive = true;
request.ContentType = "application/x-www-form-urlencoded;";
string param = string.Format(data);
var bs = Encoding.UTF8.GetBytes(param);
using (Stream reqStream = request.GetRequestStream())
{
reqStream.Write(bs, 0, bs.Length);
}
using (WebResponse response = request.GetResponse())
{
var sr = new StreamReader(response.GetResponseStream());
result = sr.ReadToEnd();
sr.Close();
}
return result;
}
catch (Exception ex)
{
throw;
}
}
private string GetToken(GmailIntegrationModel gmailIntegrationModel, string
subscribedCompanyId)
{
_logger.LogDebug("GetToken in.");
try
{
//string Url = "https://www.googleapis.com/oauth2/v4/token?";;
string Url = "https://accounts.google.com/o/oauth2/token";;
var credentials = GetGmailCredentials(subscribedCompanyId);
var data = "client_id=" + credentials.UserName + "&client_secret="
+ credentials.ApiKey + "&refresh_token=" +
gmailIntegrationModel.Refresh_Token + "&grant_type=refresh_token";
var result = CommonMethod.PostMethod(Url, data);
var res =
JsonConvert.DeserializeObject<GmailIntegrationModel>(result);
return res.Access_token;
}
catch (Exception ex)
{
_logger.LogError(ex.Message, ex);
throw;
}
}
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