谷歌认证API：如何获取用户的Gmail地址

Question

后，我一直在学习的谷歌认证API（不过，AuthSub）...我的问题是，如何获取用户的帐号信息（至少他们的Gmail地址）身份验证已通过？

因为目前，我从身份验证过程中获得的所有信息都是令牌，可以访问我在范围中指定的任何Google服务，但是，要将用户的登录标识（Gmail地址）作为据我所知...

---

如果是这样，Google服务允许我访问用户的信息？

Answer 1

使用Google AppEngine GData服务，您可以请求用户为您提供对他们的Google Mail，日历，Picasa等的访问权限。请查看here。

Answer 2

Google身份验证API是一个基于令牌的系统，用于对有效用户进行身份验证。它不公开允许将账户持有者信息返回给授权人的任何其他界面。

Answer 3

您可以通过OpenID API得到一些数据，用斧扩展。如果您使用其他方法进行身份验证，最好的办法是拨打https://www-opensocial.googleusercontent.com/api/people/@me/@self，它会得到您的姓名，电子邮件和图片。验证时，请确保在范围内有http://www-opensocial.googleusercontent.com/api。

Answer 4

[ValidateInput(false)] 
    public ActionResult Authenticate(string returnUrl) 
    { 
     try 
     { 
      logger.Info("" + returnUrl + "] LoginController : Authenticate method start "); 
      var response = openid.GetResponse(); 
      if (response == null) 
      { 
       try 
       { 
        string discoveryuri = "https://www.google.com/accounts/o8/id"; 
        //OpenIdRelyingParty openid = new OpenIdRelyingParty(); 
        var fetch = new FetchRequest();// new 
        var b = new UriBuilder(Request.Url) { Query = "" }; 
        var req = openid.CreateRequest(discoveryuri, b.Uri, b.Uri); 
        fetch.Attributes.AddRequired(WellKnownAttributes.Contact.Email); 
        fetch.Attributes.AddRequired(WellKnownAttributes.Name.FullName); 
        req.AddExtension(fetch); 
        return req.RedirectingResponse.AsActionResult(); 
       } 
       catch (ProtocolException ex) 
       { 
        logger.ErrorFormat(" LoginController : Authenticate method has error, Exception:" + ex.ToString()); 
        ViewData["Message"] = ex.Message; 
        return View("Login"); 
       } 
      } 
      else 
      { 
       logger.Info("" + returnUrl + "] LoginController : Authenticate method :when responce not null "); 
       switch (response.Status) 
       { 
        case AuthenticationStatus.Authenticated: 
         logger.Info("" + response.Status + "] LoginController : Authenticate method : responce status "); 
         var fetchResponse = response.GetExtension<FetchResponse>(); 
         string email = fetchResponse.GetAttributeValue(WellKnownAttributes.Contact.Email); 
         string userIPAddress = HttpContext.Request.UserHostAddress; 
         SecurityManager manager = new SecurityManager();        
         int userID = manager.IsValidUser(email); 

         if (userID != 0) 
         { 
          ViewBag.IsFailed = "False"; 
          logger.Info("" + userID + "] LoginController : Authenticate method : user id id not null "); 
          Session["FriendlyIdentifier"] = response.FriendlyIdentifierForDisplay; 
          Session["UserEmail"] = email; 

          FormsAuthentication.SetAuthCookie(email, false); 

          WebSession.UserEmail = email; 
          WebSession.UserID = userID; 

          UserManager userManager = new UserManager(); 
          WebSession.AssignedSites = userManager.GetAssignedSites(userID); 



          if (!string.IsNullOrEmpty(returnUrl)) 
          { 
           logger.Info("" + returnUrl + "] LoginController : Authenticate method : retutn url not null then return Redirect "); 
           return Redirect(returnUrl); 
          } 
          else 
          { 
           logger.Info("" + returnUrl + "] LoginController : Authenticate method : retutn url null then return RedirectToAction "); 
           // 
           return Redirect("/Home"); 
          } 
         } 
         else 
         { 
          ViewBag.IsFailed = "True"; 
          logger.Info("" + returnUrl + "] LoginController : Authenticate method :user id null "); 
          if (!string.IsNullOrEmpty(returnUrl)) 
          { 
           logger.Info("" + returnUrl + "] LoginController : Authenticate method :and return Redirect "); 
           return Redirect(returnUrl); 
          } 
          else 
          { 
           logger.Info("" + returnUrl + "] LoginController : Authenticate method :and return RedirectToAction "); 

           return View("Index"); 

          } 
         } 

        case AuthenticationStatus.Canceled: 
         logger.Info("" + response.Status + "] LoginController : Authenticate method : AuthenticationStatus.Canceled and return view "); 
         ViewData["Message"] = "Canceled at provider"; 
         return View("Login"); 
        case AuthenticationStatus.Failed: 
         logger.Info("" + response.Status + "] LoginController : Authenticate method : AuthenticationStatus.Failed and return view "); 
         logger.Error(response.Exception.Message); 
         ViewData["Message"] = response.Exception.Message; 
         return View("Login"); 
       } 

      } 
      logger.Info("" + returnUrl + "] LoginController : Authenticate method end and return EmptyResult"); 
      return new EmptyResult(); 
     } 
     catch (Exception ex) 
     { 
      logger.Error(" LoginController : Authenticate method ", ex); 
      throw; 
     } 
    }