C# 谷歌登录

Question

我正在维护一些我想添加聊天功能的代码。我已经有一个客户端/服务器/数据库设置，但我想做的是使用谷歌帐户登录，而不是人们必须创建新帐户等。谁能指出我正确的方向？我已经下载了这个 http://code.google.com/p/google-gdata/我走在正确的轨道上吗？

还要澄清一下，这不是一个 asp 项目，它是一个桌面项目。

Answer 1

经过大量修补，我想出了这个解决方案。它看起来很简单，但我找不到任何合适的文档。我相信人们会发现这非常有帮助。只需从 http://code.google.com/p/google-gdata/ 获取 Google API并添加 Google.GData.Client.dll 作为引用(它在 redist 文件夹下)

using Google.GData.Client;
public bool Google_Login(string email,string password, string captcha,string captchatoken)
{
    String AppName = "MyCompany-MyApp-1.0.0.0";
    Service s = new Service("code", AppName); //Can use any service, I just happened to want to use GoogleCode
    s.setUserCredentials(email, password);
    if(captcha != null && captchatoken != null) //If we already tried to log in, but we needed to captcha
    {
        if(!String.IsNullOrWhiteSpace(captcha) || !String.IsNullOrWhiteSpace(captchatoken))
        {
            s.Credentials.CaptchaToken = captchatoken;
            s.Credentials.CaptchaAnswer = captcha;
        }
    }
    try
    {
        string ret = s.QueryClientLoginToken();
        //If we end up here, then the credentials are correct.
    }
    catch(Google.GData.Client.CaptchaRequiredException ce)
    {
        //ce.Url is the full url of the Captcha image
        //If you would rather handle the captcha from
        //a webpage, you can make your user go here "https://www.google.com/accounts/DisplayUnlockCaptcha"

        //TODO Some way to display the captcha image and get user feedback
        //we'll just say you did that and returned a string named retCaptcha
        return Google_Login(email,password, retCaptcha,ce.Token);
    }
    catch(Google.GData.Client.AuthenticationException re)
    {
        //re.Message is the specific message google sends back about the login attempt.
        return false;
    }
    catch(WebException e)
    {
        //Haven't ended up here yet, but I'm sure it's possible.
        return false;
    }
    //If we somehow end up here
    return false;
}

这不是我使用的确切代码，我只是提取了它的骨架并以更通用的方式重写了它。