Question

我有一个google访问令牌，注册了gmail api和google contacts api的范围。我这样做了：

  var code = Request.QueryString["code"];

  OAuth2Parameters parameters = new OAuth2Parameters()
        {
            ClientId = clientId,
            ClientSecret = clientSecret,
            RedirectUri = redirectUri,
            Scope = scopes
        };

        if (code == null)
        {
            string url = OAuthUtil.CreateOAuth2AuthorizationUrl(parameters);

            return Redirect(url);
        }

        parameters.AccessCode = code;
        OAuthUtil.GetAccessToken(parameters);

现在我需要通过gmail api发送电子邮件。但在谷歌文档中我发现只有一种方法可以在gmail api中使用UserCredential进行身份验证：

  var service = new GmailService(new BaseClientService.Initializer()
            {
                HttpClientInitializer = credential,
                ApplicationName = ApplicationName,
            });

但我已经有了工作访问令牌，我怎么用它来发送电子邮件？

Answer 1

https://github.com/google/google-api-dotnet-client/issues/761

看起来你使用了我做的相同的例子，当你交换代码以获得需要传递给UserCredential对象的构造函数的流的令牌响应时，结果证明了。

var clientSecrets = new ClientSecrets { ClientId = clientId, ClientSecret = secret };
var flow = new GoogleAuthorizationCodeFlow(new GoogleAuthorizationCodeFlow.Initializer
            {
                ClientSecrets = clientSecrets,
                Scopes = new[] { @"https://www.googleapis.com/auth/gmail.settings.basic" }

            });

            TokenResponse token = await flow.ExchangeCodeForTokenAsync("userEmail", authCode, "http://localhost:30297", CancellationToken.None);

            UserCredential cred = new UserCredential(flow, "me", token);

            string accessToken = token.AccessToken;
            var service = new GmailService(
                new BaseClientService.Initializer { HttpClientInitializer = cred });

Answer 2

据我所知，.NET客户端不允许您从现有的访问令牌创建UserCredential对象。而是使用库提供的授权流程并使用它们生成正确的对象。

Gmail api .Net使用访问令牌发送邮件

2 个答案: