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.IDictionary
2[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
*2020-04-15 18:20:10 xxxBACKENDxxx POST /token X-ARR-LOG-ID=c0abefa4-8754-47e2-966d-add7716e6a95 443 - 000.000.000 ZUMO/4.1+(lang=Managed;+os=iOS;+os_version=13.3;+arch=MacOSX;+version=4.1.2.0) - - xxxBACKENDxxx.azurewebsites.net 200 0 0 1825 1377 6312
2020-04-15 18:20:10 xxxBACKENDxxx GET /tables/Brand $filter=(updatedAt%20ge%20datetimeoffset'2020-04-06T21%3A05%3A17.7200000%2B00%3A00')&$orderby=updatedAt&$skip=0&$top=50&__includeDeleted=true&X-ARR-LOG-ID=287a5464-caad-43be-a3c5-25245e0f9f49 443 Simulator8 000.000.000 ZUMO/4.1+(lang=Managed;+os=iOS;+os_version=13.3;+arch=MacOSX;+version=4.1.2.0) ARRAffinity=62f587f816224cc3b867889be38db42f5322e4bdb4b71703dac6a261166d1545;+.AspNet.Cookies=rpLpkcIS9jfvK1FyWL6q-2_5ImjYFR9yB1ZiIPd4iiTxHAGL5A0CFu4qihtFZmu-GKKQzVQ5hoxReQGQVpS7w2a0jnjvvFL4dpe_wS9_7nfTxMTBuDXiKDHGZBakbd28UR1CWvyq7iFDUI8AkKj1zrM2uYz93kpg1WMQCSx-Z3tREike74S3LqUOCnRuPjil-wMqOzDDDTJKL9JLQZ750MbQbT_-DLmj31qMa55emfGgUcSEM7I5ksMD2IIMvEeAEqwsp-XKyhp17utOTy5OepSqO8lxrGLng96GY-shVFBP4gDt7YP2bNS3RCtXkCWSOve4g7ckWDud8SAOk1KRpkj4k-B9ZogpAqc9Zuz0idTBruY3HZ3sTHCw__atnd8DQVwNQtEu8kX1Cz2WFbkO35GHOULA7TvKyGiJu-LOpf2-SZPoNl12lqH0jdvT1kI32WF2RDKbQ2W9eyWzURHOsUvekcg5EJOZUDEehXYfbo0 - xxxBACKENDxxx.azurewebsites.net 401 0 0 543 2837 46*
Username is correct. But if I don't call GetAuthenticationToken from LoginAsync and pass token manually to the user.MobileServiceAuthenticationToken then the result is:
//var token = await GetAuthenticationToken(username, password);
MobileServiceUser user = new MobileServiceUser(username);
user.MobileServiceAuthenticationToken = "bearer _F-Bd8_74ZGV2gmKN4dkjPIRgZh7keYa-nIKpbjvSlfBV9wP2Reu9Z9Spy1eqK47LRdnXxKlMsZ5...
client.CurrentUser = user;
2020-04-15 18:15:34 xxxBACKENDxxx GET /tables/Brand $filter=(updatedAt%20ge%20datetimeoffset'2020-04-06T21%3A05%3A17.7200000%2B00%3A00')&$orderby=updatedAt&$skip=0&$top=50&__includeDeleted=true&X-ARR-LOG-ID=c3bcf13e-b270-4d58-897f-58cfb9727e56 443 - 000.000.000. ZUMO/4.1+(lang=Managed;+os=iOS;+os_version=13.3;+arch=MacOSX;+version=4.1.2.0) - - xxxBACKENDxxx.azurewebsites.net 401 0 0 543 2249 4625
So it seems that setting a user doesn't have any effect.
Any ideas why I can't authenticate my MobileServiceClient?
I've found an answer here https://devblogs.microsoft.com/xamarin/personalized-experiences-with-azure-mobile-apps-authentication/
It's necessary to send a token in the header "Authorization". I've create a class used for HttpMessageHandler
public class AuthHandler : DelegatingHandler
{
public IMobileServiceClient Client { get; set; }
protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
if (Client.CurrentUser != null)
request.Headers.Add("Authorization", "bearer " + Client.CurrentUser.MobileServiceAuthenticationToken);
return base.SendAsync(request, cancellationToken);
}
}
I use it for client initialization
var handlers = new AuthHandler();
client = new MobileServiceClient(App.BackendUrl, handlers);
handlers.Client = client;