使用Google API for .NET访问用户信息

Question

我正在使用Google API Preview(1.7.0)通过OAuth2授权用户.我一直在关注示例MVC代码.这是我的实施FlowMetadata:

private static readonly IAuthorizationCodeFlow flow = ...; // Implementation of tokens

public static async Task<Google.Apis.Auth.OAuth2.Web.AuthorizationCodeWebApp.AuthResult> GetCredentials(Controller controller, CancellationToken cancellationToken) {
    var result = await new AuthorizationCodeMvcApp(controller, new Models.Generic.AppFlowMetadata()).AuthorizeAsync(cancellationToken);
    if (result.Credential != null)
    {
         // Struggling here. How do I make a request to get the e-mail address?
    }
}

我现在有一个有效的UserCredential访问令牌,但我找不到任何托管API来访问用户信息.我确实找到了这个问题,但这似乎假设我只是提出原始请求,而不是使用官方库.

如何获取用户的电子邮件地址？

Answer 1

您应该执行以下操作:

1. 除Google.Apis.Auth NuGet软件包外,您还应安装以下页面:https://www.nuget.org/packages/Google.Apis.Oauth2.v2

2. 将Google.Apis.Oauth2.v2.Oauth2Service.Scope.UserinfoProfile以及Google.Apis.Oauth2.v2.Oauth2Service.Scope.UserinfoEmail添加到范围列表中(初始化AppFlowMetadata时).

3. 现在,添加以下代码:

if (result.Credential != null)
{
    var oauthSerivce = new Google.Apis.Oauth2.v2.Oauth2Service(
        new BaseClientService.Initializer()
        {
            HttpClientInitializer = credential,
            ApplicationName = "OAuth 2.0 Sample",
        });

    var userInfo = await oauthSerivce.Userinfo.Get().ExecuteAsync();
    // You can use userInfo.Email, Gender, FamilyName, ... 
}