Updated Xamarin client to use the hybrid authentication flow.

src/Mobile/eShopOnContainers/eShopOnContainers.Core/GlobalSettings.cs

@@ -6,7 +6,6 @@
         public const string MockTag = "Mock";
         public const string DefaultEndpoint = "http://13.88.8.119";
 
-
         private string _baseEndpoint;
         private static readonly GlobalSetting _instance = new GlobalSetting();
 
@@ -31,6 +30,10 @@
             }
         }
 
+        public string ClientId { get { return "xamarin"; }}
+
+        public string ClientSecret { get { return "secret"; }}
+
         public string AuthToken { get; set; }
 
         public string RegisterWebsite { get; set; }
@@ -45,6 +48,8 @@
 
         public string UserInfoEndpoint { get; set; }
 
+        public string TokenEndpoint { get; set; }
+
         public string LogoutEndpoint { get; set; }
 
         public string IdentityCallback { get; set; }
@@ -59,6 +64,7 @@
             BasketEndpoint = string.Format("{0}:5103", baseEndpoint);
             IdentityEndpoint = string.Format("{0}:5105/connect/authorize", baseEndpoint);
             UserInfoEndpoint = string.Format("{0}:5105/connect/userinfo", baseEndpoint);
+            TokenEndpoint = string.Format("{0}:5105/connect/token", baseEndpoint);
             LogoutEndpoint = string.Format("{0}:5105/connect/endsession", baseEndpoint);
             IdentityCallback = string.Format("{0}:5105/xamarincallback", baseEndpoint);
             LogoutCallback = string.Format("{0}:5105/Account/Redirecting", baseEndpoint);

src/Mobile/eShopOnContainers/eShopOnContainers.Core/Models/Token/UserToken.cs

@@ -0,0 +1,22 @@
+using Newtonsoft.Json;
+
+namespace eShopOnContainers.Core.Models.Token
+{
+    public class UserToken
+    {
+        [JsonProperty("id_token")]
+        public string IdToken { get; set; }
+
+		[JsonProperty("access_token")]
+        public string AccessToken { get; set; }
+
+		[JsonProperty("expires_in")]
+        public int ExpiresIn { get; set; }
+
+		[JsonProperty("token_type")]
+        public string TokenType { get; set; }
+
+		[JsonProperty("refresh_token")]
+        public string RefreshToken { get; set; }
+    }
+}

src/Mobile/eShopOnContainers/eShopOnContainers.Core/Services/Identity/IdentityService.cs

@@ -13,11 +13,10 @@ namespace eShopOnContainers.Core.Services.Identity
 
             // Dictionary with values for the authorize request
             var dic = new Dictionary<string, string>();
-            dic.Add("client_id", "xamarin");
-            dic.Add("client_secret", "secret"); 
-            dic.Add("response_type", "code id_token token");
+            dic.Add("client_id", GlobalSetting.Instance.ClientId);
+            dic.Add("client_secret", GlobalSetting.Instance.ClientSecret); 
+            dic.Add("response_type", "code id_token");
             dic.Add("scope", "openid profile basket orders offline_access");
-
             dic.Add("redirect_uri", GlobalSetting.Instance.IdentityCallback);
             dic.Add("nonce", Guid.NewGuid().ToString("N"));
 
@@ -31,7 +30,7 @@ namespace eShopOnContainers.Core.Services.Identity
 
         public string CreateLogoutRequest(string token)
         {
-            if(string.IsNullOrEmpty(token))
+            if (string.IsNullOrEmpty(token))
             {
                 return string.Empty;
             }

src/Mobile/eShopOnContainers/eShopOnContainers.Core/Services/RequestProvider/IRequestProvider.cs

@@ -8,6 +8,8 @@ namespace eShopOnContainers.Core.Services.RequestProvider
 
         Task<TResult> PostAsync<TResult>(string uri, TResult data, string token = "", string header = "");
 
+        Task<TResult> PostAsync<TResult>(string uri, string data, string clientId, string clientSecret);
+
         Task DeleteAsync(string uri, string token = "");
     }
 }

src/Mobile/eShopOnContainers/eShopOnContainers.Core/Services/RequestProvider/RequestProvider.cs

@@ -61,6 +61,28 @@ namespace eShopOnContainers.Core.Services.RequestProvider
             return result;
         }
 
+        public async Task<TResult> PostAsync<TResult>(string uri, string data, string clientId, string clientSecret)
+        {
+			HttpClient httpClient = CreateHttpClient(string.Empty);
+
+            if (!string.IsNullOrWhiteSpace(clientId) && !string.IsNullOrWhiteSpace(clientSecret))
+			{
+                AddBasicAuthenticationHeader(httpClient, clientId, clientSecret);
+			}
+
+            var content = new StringContent(data);
+            content.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded");
+			HttpResponseMessage response = await httpClient.PostAsync(uri, content);
+
+			await HandleResponse(response);
+			string serialized = await response.Content.ReadAsStringAsync();
+
+			TResult result = await Task.Run(() =>
+				JsonConvert.DeserializeObject<TResult>(serialized, _serializerSettings));
+
+			return result;
+        }
+
         public async Task DeleteAsync(string uri, string token = "")
         {
             HttpClient httpClient = CreateHttpClient(token);
@@ -90,6 +112,17 @@ namespace eShopOnContainers.Core.Services.RequestProvider
             httpClient.DefaultRequestHeaders.Add(parameter, Guid.NewGuid().ToString());
         }
 
+        private void AddBasicAuthenticationHeader(HttpClient httpClient, string clientId, string clientSecret)
+        {
+			if (httpClient == null)
+				return;
+
+            if (string.IsNullOrWhiteSpace(clientId) || string.IsNullOrWhiteSpace(clientSecret))
+				return;
+
+            httpClient.DefaultRequestHeaders.Authorization = new BasicAuthenticationHeaderValue(clientId, clientSecret);
+        }
+
         private async Task HandleResponse(HttpResponseMessage response)
         {
             if (!response.IsSuccessStatusCode)

src/Mobile/eShopOnContainers/eShopOnContainers.Core/Services/Token/ITokenService.cs

@@ -0,0 +1,10 @@
+using eShopOnContainers.Core.Models.Token;
+using System.Threading.Tasks;
+
+namespace eShopOnContainers.Core.Services.Token
+{
+    public interface ITokenService
+    {
+        Task<UserToken> GetTokenAsync(string code);
+    }
+}

src/Mobile/eShopOnContainers/eShopOnContainers.Core/Services/Token/TokenService.cs

@@ -0,0 +1,24 @@
+using System.Net;
+using System.Threading.Tasks;
+using eShopOnContainers.Core.Services.RequestProvider;
+using eShopOnContainers.Core.Models.Token;
+
+namespace eShopOnContainers.Core.Services.Token
+{
+    public class TokenService : ITokenService
+    {
+        private readonly IRequestProvider _requestProvider;
+
+        public TokenService(IRequestProvider requestProvider)
+        {
+            _requestProvider = requestProvider;
+        }
+
+        public async Task<UserToken> GetTokenAsync(string code)
+        {
+            string data = string.Format("grant_type=authorization_code&code={0}&redirect_uri={1}", code, WebUtility.UrlEncode(GlobalSetting.Instance.IdentityCallback));
+            var token = await _requestProvider.PostAsync<UserToken>(GlobalSetting.Instance.TokenEndpoint, data, GlobalSetting.Instance.ClientId, GlobalSetting.Instance.ClientSecret);
+            return token;
+        }
+    }
+}

src/Mobile/eShopOnContainers/eShopOnContainers.Core/ViewModels/Base/ViewModelLocator.cs

@@ -8,6 +8,7 @@ using eShopOnContainers.Core.Services.OpenUrl;
 using eShopOnContainers.Core.Services.RequestProvider;
 using eShopOnContainers.Core.Services.Basket;
 using eShopOnContainers.Core.Services.Identity;
+using eShopOnContainers.Core.Services.Token;
 using eShopOnContainers.Core.Services.Order;
 using eShopOnContainers.Core.Services.User;
 using Xamarin.Forms;
@@ -52,6 +53,7 @@ namespace eShopOnContainers.Core.ViewModels.Base
 			builder.RegisterType<DialogService>().As<IDialogService>();
 			builder.RegisterType<OpenUrlService>().As<IOpenUrlService>();
 			builder.RegisterType<IdentityService>().As<IIdentityService>();
+            builder.RegisterType<TokenService>().As<ITokenService>();
 			builder.RegisterType<RequestProvider>().As<IRequestProvider>();
 
 			if (useMockServices)

src/Mobile/eShopOnContainers/eShopOnContainers.Core/ViewModels/LoginViewModel.cs

@@ -1,6 +1,7 @@
 using eShopOnContainers.Core.Helpers;
 using eShopOnContainers.Core.Models.User;
 using eShopOnContainers.Core.Services.Identity;
+using eShopOnContainers.Core.Services.Token;
 using eShopOnContainers.Core.Services.OpenUrl;
 using eShopOnContainers.Core.Validations;
 using eShopOnContainers.Core.ViewModels.Base;
@@ -24,13 +25,16 @@ namespace eShopOnContainers.Core.ViewModels
 
         private IOpenUrlService _openUrlService;
         private IIdentityService _identityService;
+        private ITokenService _tokenService;
 
         public LoginViewModel(
             IOpenUrlService openUrlService,
-            IIdentityService identityService)
+            IIdentityService identityService,
+            ITokenService tokenService)
         {
             _openUrlService = openUrlService;
             _identityService = identityService;
+            _tokenService = tokenService;
 
             _userName = new ValidatableObject<string>();
             _password = new ValidatableObject<string>();
@@ -233,10 +237,12 @@ namespace eShopOnContainers.Core.ViewModels
             else if (unescapedUrl.Contains(GlobalSetting.Instance.IdentityCallback))
             {
                 var authResponse = new AuthorizeResponse(url);
-
-                if (!string.IsNullOrWhiteSpace(authResponse.AccessToken))
+                if (!string.IsNullOrWhiteSpace(authResponse.Code))
                 {
-                    if (authResponse.AccessToken != null)
+                    var userToken = await _tokenService.GetTokenAsync(authResponse.Code);
+                    string accessToken = userToken.AccessToken;
+
+                    if (!string.IsNullOrWhiteSpace(accessToken))
                     {
                         Settings.AuthAccessToken = authResponse.AccessToken;
                         Settings.AuthIdToken = authResponse.IdentityToken;

src/Mobile/eShopOnContainers/eShopOnContainers.Core/eShopOnContainers.Core.csproj

@@ -166,6 +166,9 @@
     <Compile Include="Converters\FirstValidationErrorConverter.cs" />
     <Compile Include="Effects\EntryLineColorEffect.cs" />
     <Compile Include="Behaviors\LineColorBehavior.cs" />
+    <Compile Include="Models\Token\UserToken.cs" />
+    <Compile Include="Services\Token\TokenService.cs" />
+    <Compile Include="Services\Token\ITokenService.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="app.config" />
@@ -259,6 +262,10 @@
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Models\Token\" />
+    <Folder Include="Services\Token\" />
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
     <PropertyGroup>