当用户使用其Google+帐户唱歌时，我可以获取所有数据，但不能发送电子邮件。 email = null和verify_email = false

Question

     string URL=string.Format("https://www.googleapis.com/oauth2/v1/userinfo?access_token={0}", googleresponse.access_token);

  private A GetGoogleUser<A>(string urluser) where A:class
        {
           A user = null;
            if (googleresponse != null && !string.IsNullOrEmpty(googleresponse.access_token))
            {                
                HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(urluser);
                HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse();
                if (((HttpWebResponse)webresponse).StatusCode == HttpStatusCode.OK)
                {
                    using (Stream recieveuser = webresponse.GetResponseStream())
                    {
                        Encoding encode = System.Text.Encoding.GetEncoding("utf-8");
                        using (StreamReader readstream = new StreamReader(recieveuser, encode))
                        {
                            user = new JavaScriptSerializer().Deserialize<A>(readstream.ReadToEnd());
                            webresponse.Close();
                            readstream.Close();
                        }
                    }
                }                 
            }
            return  user;
        }

It is code that I can get User data When User sign in with their Google+ account to my website. Everthing is fine. I can get User data (id,name,gender,picture,link,family_name,locale) , but only I can't email.

email=null
verified_email=false

But yesterday it was not so. I could get email too.

Does anyone know that where is my mistake ?

@@@. . . I used only https://www.googleapis.com/auth/plus.profile.emails.read as scope , and string URL=string.Format("https://www.googleapis.com/plus/v1/people/me?access_token={0}‌​‌​", googleresponse.access_token); for creating HttpWebRequest . I can get all user's data, also email .

I wrote this here because may be other users can be use.

Answer 1

You also need the https://www.googleapis.com/auth/plus.profile.emails.read scope. See https://developers.google.com/+/web/people/#retrieve_an_authenticated_users_email_address and https://developers.google.com/+/api/oauth#email-scopes for more details.

Update

To be clear, you still need the https://www.googleapis.com/auth/plus.login scope in addition to the plus.profile.emails scope I mentioned above.

You'll still use the plus.people.get endpoint described at https://developers.google.com/+/api/latest/people/get

You should no longer use the userinfo endpoint - those have been deprecated and will be removed in September.