Microsoft Graph - Failed to get token

Question

I am trying to get data from a Microsoft chart in my web application.

When I call AcquireTokenSilentAsync(), I get the error message "Failed to get the token silently. AcquireToken call method."

So I tried to use the method AcquireTokenAsync(). However, this gets the token, when I try to access the resource, I get 403 - Forbidden.

I tested it in Fiddler and it works.

When I look at the token from AcquireTokenAsync()and compare it with the token received from the violinist, it is about 1/3 of the length. I do not know if this is a problem, and is there a fix?

Does anyone know a solution to this problem?

My code is as follows:

GetToken ():

public async static Task<AuthenticationResult> GetTokenAsync(AuthenticationContext ctx, string resourceId)
{
    ClientCredential credential = new ClientCredential(OfficeSettings.ClientId, OfficeSettings.ClientSecret);
    var userObjectId = ClaimsPrincipal.Current.FindFirst("http://schemas.microsoft.com/identity/claims/objectidentifier").Value;
    UserIdentifier ident = new UserIdentifier(userObjectId, UserIdentifierType.UniqueId);

    var redirectUrl = new Uri(HttpContext.Current.Request.Url.GetLeftPart(UriPartial.Path));

    try
    {
        var result = await ctx.AcquireTokenSilentAsync(resourceId, credential, ident);
        //var result = await ctx.AcquireTokenAsync(resourceId, credential);
        LastAuthority = ctx.Authority;
        return result;
    }
    catch (AdalException e)
    {
        ctx.TokenCache.Clear();
        return null;
    }
    catch (Exception ex)
    {
        throw ex;
    }
}

GetUserEmail () (access to the resource):

private const string _allUsersUrl = "https://graph.microsoft.com/beta/users?$filter=displayName%20eq%20'{0}'";

public static async Task<List<string>> GetUserEmails(List<string> displayNames)
{
    var emails = new List<string>();
    using (var client = new HttpClient())
    {
        foreach (var name in displayNames)
        {
            var url = string.Format(_allUsersUrl, name.Replace(" ", "+")).Replace(" ", "%20");
            using (var req = new HttpRequestMessage(HttpMethod.Get, url))
            {
                var token = await GetToken();
                req.Headers.Add("Authorization", string.Format("Bearer {0}", token));
                req.Headers.TryAddWithoutValidation("Content-Type", "application/json");
                using (var response = await client.SendAsync(req))
                {
                    //TODO: Forbidden error message. However, token seems to be retrieved correctly
                    var content = await response.Content.ReadAsStringAsync();
                    foreach (var item in JObject.Parse(content)["value"])
                    {
                        emails.Add(item["userPrincipalName"].ToString());
                    }
                }
            }
        }
    }
    return emails;
}

EDIT:

, AcquireTokenSilentAsync(), , .

Answer 1

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