Ciao,
I have ASP.NET Web Application (.NET Framework) based on Visual Studio 2019 template with custom authentication with individual user accounts.
public void ConfigureAuth(IAppBuilder app)
{
// Configure the db context and user manager to use a single instance per request
app.CreatePerOwinContext(ApplicationDbContext.Create);
app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
// Enable the application to use a cookie to store information for the signed in user
// and to use a cookie to temporarily store information about a user logging in with a third party login provider
app.UseCookieAuthentication(new CookieAuthenticationOptions());
app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);
// Configure the application for OAuth based flow
PublicClientId = "self";
OAuthOptions = new OAuthAuthorizationServerOptions
{
TokenEndpointPath = new PathString("/Token"),
Provider = new ApplicationOAuthProvider(PublicClientId),
AuthorizeEndpointPath = new PathString("/api/Account/ExternalLogin"),
AccessTokenExpireTimeSpan = TimeSpan.FromDays(10),
// In production mode set AllowInsecureHttp = false
AllowInsecureHttp = false
};
// Enable the application to use bearer tokens to authenticate users
app.UseOAuthBearerTokens(OAuthOptions);
}
It works with Postman. I am able to obtain a token and access controller marked as [Authorize]
I am struggling with authentication of MobileServiceClient that I use for offline sync. Client is initialized in this way:
client = new MobileServiceClient(App.BackendUrl, new NativeMessageHandler());
public async Task LoginAsync(string username, string password)
{
try
{
var token = await GetAuthenticationToken(username, password);
MobileServiceUser user = new MobileServiceUser(token.userName);
user.MobileServiceAuthenticationToken = token.Access_Token;
client.CurrentUser = user;
}
catch (InvalidGrantException)
{
throw;
}
catch (MobileServiceInvalidOperationException ex)
{
throw;
}
catch (Exception ex)
{
Crashes.TrackError(ex);
Debug.WriteLine(ex);
throw;
}
}
private async Task<AuthenticationToken> GetAuthenticationToken(string username, string password)
{
var keyValues = new List<KeyValuePair<string, string>>
{
new KeyValuePair<string, string>("username", username),
new KeyValuePair<string, string>("password", password),
new KeyValuePair<string, string>("grant_type", "password")
};
HttpContent httpContent = new FormUrlEncodedContent(keyValues);
httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded");
try
{
var response = await client.InvokeApiAsync("/token",
httpContent,
HttpMethod.Post,
null,
null);
return JsonConvert.DeserializeObject<AuthenticationToken>(await response.Content.ReadAsStringAsync());
}
catch (MobileServiceInvalidOperationException exception)
{
if (string.Equals(exception.Message, "invalid_grant"))
throw new InvalidGrantException("invalid credentials", exception);
else
throw;
}
}
Here some code for testing:
public async Task InitializeAsync()
{
if (client?.SyncContext?.IsInitialized ?? false)
return;
// Create a reference to the local sqlite store
const string path = "syncstore.db";
var store = new MobileServiceSQLiteStore(path);
// Define the database schema
store.DefineTable<Brand>(); brandTable = new AzureCloudTable<Brand>(client, null);
// Actually create the store and update the schema
try
{
await client.SyncContext.InitializeAsync(store);
}
catch (Exception ex)
{
Crashes.TrackError(ex);
Debug.WriteLine(ex);
}
}
async Task Test(string username, string password)
{
await LoginAsync("Simulator8", " ");
await InitializeAsync();
//Test pull
try
{
await brandTable.PullAsync();
}
catch (Exception ex)
{
}
}
Test throws exception:
- ex {Microsoft.WindowsAzure.MobileServices.MobileServiceInvalidOperationException: The request could not be completed. (Unauthorized)
at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient.ThrowInvalidResponse (System.Net.Http.HttpRequestMessage request, System.Net.Http.HttpResponseMessage response) [0x001d2] in :0
at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient.SendRequestAsync (System.Net.Http.HttpClient client, System.Net.Http.HttpRequestMessage request, System.Boolean ensureResponseContent, System.Threading.CancellationToken cancellationToken) [0x00121] in :0
at Microsoft.WindowsAzure.MobileServices.MobileServiceHttpClient.RequestAsync (System.Boolean UseHandlers, System.Net.Http.HttpMethod method, System.String uriPathAndQuery, Microsoft.WindowsAzure.MobileServices.MobileServiceUser user, System.String content, System.Boolean ensureResponseContent, System.Collections.Generic.IDictionary2[TKey,TValue] requestHeaders, System.Threading.CancellationToken cancellationToken) [0x000f0] in <d385e67aff524dc7bd2d27425b9e81ae>:0 at Microsoft.WindowsAzure.MobileServices.MobileServiceTable.ReadAsync (System.String uriString, Microsoft.WindowsAzure.MobileServices.MobileServiceFeatures features) [0x0009c] in <d385e67aff524dc7bd2d27425b9e81ae>:0 at Microsoft.WindowsAzure.MobileServices.MobileServiceTable.ReadAsync (System.String query, System.Collections.Generic.IDictionary2[TKey,TValue] parameters, Microsoft.WindowsAzure.MobileServices.MobileServiceFeatures features) [0x00136] in :0
at Microsoft.WindowsAzure.MobileServices.Sync.PullAction.ProcessTableAsync () [0x00134] in :0
at Microsoft.WindowsAzure.MobileServices.Sync.TableAction.ExecuteAsync () [0x00251] in :0
at Microsoft.WindowsAzure.MobileServices.Sync.MobileServiceSyncContext.ExecuteSyncAction (Microsoft.WindowsAzure.MobileServices.Sync.SyncAction action) [0x00090] in :0
at Microsoft.WindowsAzure.MobileServices.Sync.MobileServiceSyncContext.PullAsync (System.String tableName, Microsoft.WindowsAzure.MobileServices.Sync.MobileServiceTableKind tableKind, System.String queryId, System.String query, Microsoft.WindowsAzure.MobileServices.MobileServiceRemoteTableOptions options, System.Collections.Generic.IDictionary2[TKey,TValue] parameters, System.Collections.Generic.IEnumerable1[T] relatedTables, Microsoft.WindowsAzure.MobileServices.MobileServiceObjectReader reader, System.Threading.CancellationToken cancellationToken, Microsoft.WindowsAzure.MobileServices.Sync.PullOptions pullOptions) [0x00361] in :0
- If I try token that I receive in token.Access_Token in Postman it works
- If I try sync with controller without [Authorize] it works.
This is the message from Azure Log stream:
![]()
Username is correct. But if I don't call GetAuthenticationToken from LoginAsync and pass token manually to the user.MobileServiceAuthenticationToken then the result is:
![]()
So it seems that setting a user doesn't have any effect.
Any ideas why I can't authenticate my MobileServiceClient?
