AbpZero之企业微信---登录（拓展第三方auth授权登录）---第一步：查看AbpZero的auth第三方登录的底层机制

在AbpZero框架中，auth登录接口位于Web.Core库下的Controllers文件夹的TokenAuthController.cs的ExternalAuthenticate方法

ExternalAuthenticate方法的代码如下：

    [HttpPost]
          public async Task<ExternalAuthenticateResultModel> ExternalAuthenticate([FromBody] ExternalAuthenticateModel model)
          {
              var externalUser = await GetExternalUserInfo(model);

              var loginResult = await _logInManager.LoginAsync(new UserLoginInfo(model.AuthProvider, model.ProviderKey, model.AuthProvider), GetTenancyNameOrNull());
              switch (loginResult.Result)
              {
                  case AbpLoginResultType.Success:
                     {
                         var accessToken = CreateAccessToken(CreateJwtClaims(loginResult.Identity));

                         var returnUrl = model.ReturnUrl;

                         if (model.SingleSignIn.HasValue && model.SingleSignIn.Value && loginResult.Result == AbpLoginResultType.Success)
                         {
                             loginResult.User.SetSignInToken();
                             returnUrl = AddSingleSignInParametersToReturnUrl(model.ReturnUrl, loginResult.User.SignInToken, loginResult.User.Id, loginResult.User.TenantId);
                         }

                         return new ExternalAuthenticateResultModel
                         {
                             AccessToken = accessToken,
                             EncryptedAccessToken = GetEncrpyedAccessToken(accessToken),
                             ExpireInSeconds = (int)_configuration.Expiration.TotalSeconds,
                             ReturnUrl = returnUrl
                         };
                     }
                 case AbpLoginResultType.UnknownExternalLogin:
                     {
                         var newUser = await RegisterExternalUserAsync(externalUser);
                         if (!newUser.IsActive)
                         {
                             return new ExternalAuthenticateResultModel
                             {
                                 WaitingForActivation = true
                             };
                         }

                         //Try to login again with newly registered user!
                         loginResult = await _logInManager.LoginAsync(new UserLoginInfo(model.AuthProvider, model.ProviderKey, model.AuthProvider), GetTenancyNameOrNull());
                         if (loginResult.Result != AbpLoginResultType.Success)
                         {
                             throw _abpLoginResultTypeHelper.CreateExceptionForFailedLoginAttempt(
                                 loginResult.Result,
                                 model.ProviderKey,
                                 GetTenancyNameOrNull()
                             );
                         }

                         var accessToken = CreateAccessToken(CreateJwtClaims(loginResult.Identity));
                         return new ExternalAuthenticateResultModel
                         {
                             AccessToken = accessToken,
                             EncryptedAccessToken = GetEncrpyedAccessToken(accessToken),
                             ExpireInSeconds = (int)_configuration.Expiration.TotalSeconds
                         };
                     }
                 default:
                     {
                         throw _abpLoginResultTypeHelper.CreateExceptionForFailedLoginAttempt(
                             loginResult.Result,
                             model.ProviderKey,
                             GetTenancyNameOrNull()
                         );
                     }
             }
         }

我们查看 GetExternalUserInfo下面的方法，发现它是已经封装成了Abp.AspNetZeroCore.Web.dll，我们用反编译工具可以看到对应的代码

随便拿个谷歌的auth登录看下

 using System;
 using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Authentication.Google;
 using Newtonsoft.Json.Linq;

 namespace Abp.AspNetZeroCore.Web.Authentication.External.Google
 {
     // Token: 0x02000010 RID: 16
     public class GoogleAuthProviderApi : ExternalAuthProviderApiBase
     {
         // Token: 0x06000036 RID: 54 RVA: 0x0000244C File Offset: 0x0000064C
         public override async Task<ExternalAuthUserInfo> GetUserInfo(string accessCode)
         {
             ExternalAuthUserInfo result;
             using (HttpClient client = new HttpClient())
             {
                 client.DefaultRequestHeaders.UserAgent.ParseAdd("Microsoft ASP.NET Core OAuth middleware");
                 client.DefaultRequestHeaders.Accept.ParseAdd("application/json");
                 client.Timeout = TimeSpan.FromSeconds(30.0);
                 client.MaxResponseContentBufferSize = 10485760L;
                 HttpResponseMessage httpResponseMessage = await client.SendAsync(new HttpRequestMessage(HttpMethod.Get, GoogleDefaults.UserInformationEndpoint)
                 {
                     Headers =
                     {
                         Authorization = new AuthenticationHeaderValue("Bearer", accessCode)
                     }
                 });
                 httpResponseMessage.EnsureSuccessStatusCode();
                 JObject user = JObject.Parse(await httpResponseMessage.Content.ReadAsStringAsync());
                 result = new ExternalAuthUserInfo
                 {
                     Name = GoogleHelper.GetName(user),
                     EmailAddress = GoogleHelper.GetEmail(user),
                     Surname = GoogleHelper.GetFamilyName(user),
                     ProviderKey = GoogleHelper.GetId(user),
                     Provider = "Google"
                 };
             }
             return result;
         }

         // Token: 0x04000010 RID: 16
         public const string Name = "Google";
     }
 }

发现auth登录都是继承于ExternalAuthProviderApiBase

篇幅太长，下回分解。