Hi App Developers, I have returned to an old code set from '22 and found an issue with refresh auth tokens.
I am getting a 400 bad request with the inner exception “Invalid Refresh Token, Unable to migrate grant.”.
I understand that refresh token values may change between grants but the weird part is I am taking the refresh token from freshly completed authentication, so the token should not have changed as I have just received it.
Here is the method I am using for token refresh, using C#.
public async Task<AuthToken> refreshToken(string _clientId, string _refreshToken)
{
AuthToken token;
string authenticationUrl = tokenURL;
HttpClient client = new HttpClient();
HttpRequestMessage request = new HttpRequestMessage();
string content;
try
{
//set the request message
request.Method = HttpMethod.Post;
request.RequestUri = new Uri(authenticationUrl);
request.Headers.Add("Host", "login.eveonline.com");
//create content string
content = string.Concat("grant_type=refresh_token",
"&refresh_token=", _refreshToken,
"&client_id=", _clientId);
//parse content to HTTP content
HttpContent postBody = new StringContent(content, Encoding.UTF8, "application/x-www-form-urlencoded");
//set content
request.Content = postBody;
//send request
var result = await client.SendAsync(request);
//output result.
var output = await result.Content.ReadAsStringAsync();
if(result.StatusCode == HttpStatusCode.OK)
{
Core.log("Token refresh successful, saving token...", Core.LogType.Information);
token = deserializeToken(output);
tokenValidFrom = DateTime.Now;
Core.log("Token saved...", Core.LogType.Information);
return token;
}
else
{
Core.log(String.Concat("Token refresh failed with satus : '", result.StatusCode.ToString()), Core.LogType.Error);
return null;
}
}
catch(Exception ex)
{
Core.log(String.Concat("Token refresh failed with exception : '", ex.ToString()), Core.LogType.Error);
return null;
}
}
Any help would be greatly appreciated as I have read and re-read the ESI docs till my eyes bleed and I cannot see an issue 