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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| /* | ||
| * Copyright (c) Microsoft. All rights reserved. Licensed under the MIT license. | ||
| * See LICENSE in the source repository root for complete license information. | ||
| */ | ||
|
|
||
| using System.Threading.Tasks; | ||
|
|
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| namespace Microsoft_Graph_ExcelRest_ToDo.Helpers | ||
| { | ||
| public interface IAuthProvider | ||
| { | ||
| Task<string> GetUserAccessTokenAsync(); | ||
| } | ||
| } |
73 changes: 73 additions & 0 deletions
73
Microsoft-Graph-ExcelRest-ToDo/Helpers/SampleAuthProvider.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| /* | ||
| * Copyright (c) Microsoft. All rights reserved. Licensed under the MIT license. | ||
| * See LICENSE in the source repository root for complete license information. | ||
| */ | ||
|
|
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| using Microsoft.Identity.Client; | ||
| using Microsoft.Owin.Security; | ||
| using Microsoft.Owin.Security.OpenIdConnect; | ||
| using Microsoft_Graph_ExcelRest_ToDo.TokenStorage; | ||
| using System.Collections.Generic; | ||
| using System.Configuration; | ||
| using System.Linq; | ||
| using System.Security.Claims; | ||
| using System.Threading.Tasks; | ||
| using System.Web; | ||
| using System; | ||
|
|
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| namespace Microsoft_Graph_ExcelRest_ToDo.Helpers | ||
| { | ||
| public sealed class SampleAuthProvider : IAuthProvider | ||
| { | ||
|
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| // Properties used to get and manage an access token. | ||
| private string redirectUri = ConfigurationManager.AppSettings["ida:RedirectUri"]; | ||
| private string appId = ConfigurationManager.AppSettings["ida:AppId"]; | ||
| private string appSecret = ConfigurationManager.AppSettings["ida:AppSecret"]; | ||
| private string scopes = ConfigurationManager.AppSettings["ida:GraphScopes"]; | ||
| private SessionTokenCache tokenCache { get; set; } | ||
|
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| private static readonly SampleAuthProvider instance = new SampleAuthProvider(); | ||
| private SampleAuthProvider() { } | ||
|
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| public static SampleAuthProvider Instance | ||
| { | ||
| get | ||
| { | ||
| return instance; | ||
| } | ||
| } | ||
|
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| // Gets an access token. First tries to get the token from the token cache. | ||
| public async Task<string> GetUserAccessTokenAsync() | ||
| { | ||
| string signedInUserID = ClaimsPrincipal.Current.FindFirst(ClaimTypes.NameIdentifier).Value; | ||
| HttpContextWrapper httpContext = new HttpContextWrapper(HttpContext.Current); | ||
| TokenCache userTokenCache = new SessionTokenCache(signedInUserID, httpContext).GetMsalCacheInstance(); | ||
| //var cachedItems = tokenCache.ReadItems(appId); // see what's in the cache | ||
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| ConfidentialClientApplication cca = new ConfidentialClientApplication( | ||
| appId, | ||
| redirectUri, | ||
| new ClientCredential(appSecret), | ||
| userTokenCache, | ||
| null); | ||
|
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| try | ||
| { | ||
| AuthenticationResult result = await cca.AcquireTokenSilentAsync(scopes.Split(new char[] { ' ' }), cca.Users.First()); | ||
| return result.AccessToken; | ||
| } | ||
|
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| // Unable to retrieve the access token silently. | ||
| catch (Exception) | ||
| { | ||
| HttpContext.Current.Request.GetOwinContext().Authentication.Challenge( | ||
| new AuthenticationProperties() { RedirectUri = "/" }, | ||
| OpenIdConnectAuthenticationDefaults.AuthenticationType); | ||
|
|
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| throw new Exception("Caller needs to authenticate."); | ||
| } | ||
| } | ||
| } | ||
| } |
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