如何从访问令牌中获取用户详细信息

Question

I downloaded this sample: https://github.com/Microsoft/PowerBI-Developer-Samples/tree/master/User%20Owns%20Data/integrate-report-web-app/PBIWebApp

and I am able to get access token. Next, I saved this access token in my database for future use. Using this token stored in database I want to get user's profile but not sure how to do it.

public string GetAccessToken(string authorizationCode, string applicationID, string applicationSecret, string redirectUri)
        {
            //Redirect uri must match the redirect_uri used when requesting Authorization code.
            //Note: If you use a redirect back to Default, as in this sample, you need to add a forward slash
            //such as http://localhost:13526/

            // Get auth token from auth code       
            TokenCache TC = new TokenCache();

            //Values are hard-coded for sample purposes
            string authority = Settings.Default.AADAuthorityUri;
            AuthenticationContext AC = new AuthenticationContext(authority, TC);
            ClientCredential cc = new ClientCredential(applicationID, applicationSecret);

            //Set token from authentication result
            return AC.AcquireTokenByAuthorizationCode(
                authorizationCode,
                new Uri(redirectUri), cc).AccessToken;
        }

I checked methods of AuthenticationContext class but it doesn't have any method like 'GetMe' or something.

Any help is appreciated.

Answer 1

ADAL is only for authentication, it is not for calling APIs like the Microsoft Graph API.

You'll need to acquire a token for the https://graph.microsoft.com resource, and then call the endpoint for user information: https://developer.microsoft.com/en-us/graph/docs/api-reference/v1.0/api/user_get .

There is also an SDK which can make the calls a bit easier: https://www.nuget.org/packages/Microsoft.Graph/

Answer 2

You can make use of JWTSecurityToken in C#. Also, you can visit https://jwt.io/ to see its working.