重新申请Xamarin.Auth的facebook权限

Question

我试图在Facebook重新要求拒绝的权限。

根据facebook开发者的说法，一旦有人拒绝了权限，登录对话框将不会重新询问他们，除非您明确告诉对话框，您重新要求拒绝的权限。

您可以通过将auth_type=rerequest参数添加到您的登录中。

我做了这个，但是这么想的工作

var auth = new OAuth2Authenticator(
      clientId: "my app id", // your OAuth2 client id 
      scope: "email", // the scopes for the particular API you're accessing, delimited by "+" symbols 
      authorizeUrl: new Uri("https://m.facebook.com/dialog/oauth/"), 
      redirectUrl: new Uri("http://www.facebook.com/connect/login_success.html")); 

     progressDialog.Show(); 
     auth.Completed += async (sender, eventArgs) => 
     { 
      if (eventArgs.IsAuthenticated) 
      { 
       var accessToken = eventArgs.Account.Properties["access_token"].ToString(); 
       var expiresIn = Convert.ToDouble(eventArgs.Account.Properties["expires_in"]); 
       var expiryDate = DateTime.Now + TimeSpan.FromSeconds(expiresIn); 

       IDictionary<string, string> hashRequest = new Dictionary<string, string>(); 
       hashRequest.Add("auth_type", "rerequest"); 

       var request = new OAuth2Request("GET", new Uri("https://graph.facebook.com/me?fields=education,email,location,name"),hashRequest, eventArgs.Account); 
       var response = await request.GetResponseAsync(); 
       var obj = JObject.Parse(response.GetResponseText()); ... 

Answer 1

我解决了一些附加属性的HTML请求的问题。

var auth = new OAuth2Authenticator (
      clientId: "myappid", // your OAuth2 client id 
      scope: "email", // the scopes for the particular API you're accessing, delimited by "+" symbols 
      authorizeUrl: new Uri ("https://m.facebook.com/dialog/oauth?auth_type=rerequest&client_id=myappid&" + 
            "redirect_uri=http://www.facebook.com/connect/login_success.html&scope=email/"), 
      redirectUrl: new Uri ("http://www.facebook.com/connect/login_success.html"));