Hi,
The above suggestion from Eric_Zang won't work for Asp .Net Core as the UserPasswordCredentials is not supported in .NET Core. See: https://github.com/AzureAD/azure-activedirectory-library-for-dotnet/issues/482
I came across the same issues recently. My work-around was to use make a native REST call to the Azure AD for a token. I was pointed to this approach here: https://github.com/Microsoft/PowerBI-CSharp/issues/116
My solution is as follows:
Replace the following from Eric_Zang's example
var credential = new UserPasswordCredential(Username, Password);
// Authenticate using created credentials
var authenticationContext = new AuthenticationContext(AuthorityUrl);
var authenticationResult = await authenticationContext.AcquireTokenAsync(ResourceUrl, ClientId, credential);
with:
var authenticationResult = await AuthenticateAsync();
private static async Task<OAuthResult> AuthenticateAsync()
{
var oauthEndpoint = new Uri(AuthorityUrl);
using (var client = new HttpClient())
{
var result = await client.PostAsync(oauthEndpoint, new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("resource", ResourceUrl),
new KeyValuePair<string, string>("client_id", ClientId),
new KeyValuePair<string, string>("grant_type", "password"),
new KeyValuePair<string, string>("username", Username),
new KeyValuePair<string, string>("password", Password),
new KeyValuePair<string, string>("scope", "openid"),
}));
var content = await result.Content.ReadAsStringAsync();
return JsonConvert.DeserializeObject<OAuthResult>(content);
}
}
class OAuthResult
{
[JsonProperty("token_type")]
public string TokenType { get; set; }
[JsonProperty("scope")]
public string Scope { get; set; }
[JsonProperty("experies_in")]
public int ExpiresIn { get; set; }
[JsonProperty("ext_experies_in")]
public int ExtExpiresIn { get; set; }
[JsonProperty("experies_on")]
public int ExpiresOn { get; set; }
[JsonProperty("not_before")]
public int NotBefore { get; set; }
[JsonProperty("resource")]
public Uri Resource { get; set; }
[JsonProperty("access_token")]
public string AccessToken { get; set; }
[JsonProperty("refresh_token")]
public string RefreshToken { get; set; }
}I understand that using the OAuth Password grant was removed from ADAL for .NET Core to strongly discourage transporting and saving user credentials.
I would like very much for a recommended approach for using PowerBI Embedded in as Asp .Net Core app.
Hope this helps.
Jeremy
