Facebook doesn't return email to user
I'm trying to implement Facebook Authentication in an existing ASP.NET MVC 5 application using Microsoft's OWIN OAuth Libraries and can't find a way to get the user's email address. Registration looks like this:
var options = new FacebookAuthenticationOptions
{
AppId = "YYY",
AppSecret = "ZZZ"
};
options.Scope.Add("public_profile");
options.Scope.Add("email");
app.UseFacebookAuthentication(options);
An area is added to the parameters email
.
When authenticated in a ExternalLoginCallback
method in a controller, email
it is null with this code:
AuthenticateResult authResult = await authenticationManager.AuthenticateAsync(DefaultAuthenticationTypes.ExternalCookie);
ClaimsIdentity externalIdentity = authResult.Identity;
string email = externalIdentity.FindFirstValue(ClaimTypes.Email);
Also tried this to no avail:
var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();
var email = loginInfo.Email;
The Json data returned from Facebook doesn't seem to contain an email address:
{"id":"989197284440871","first_name":"Martin","gender":"male","last_name":"Stauf\u010d\u00edk","link":"https:\/\/www.facebook.com\/app_scoped_user_id\/989197284440871\/","locale":"cs_CZ","name":"Martin Stauf\u010d\u00edk","timezone":2,"updated_time":"2014-10-18T16:14:08+0000","verified":true}
Is it a problem with Facebook not returning an address or is there something missing in the code? Any help offered would be appreciated.
Thank.
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To answer my own question, I just updated my application to use the latest MVC 5.2.3 and OWIN 3.0.1 components, and authentication is now working. Code to get email address:
[AllowAnonymous]
public async Task<ActionResult> ExternalLoginCallback(string returnUrl)
{
var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();
var email = loginInfo.Email;
...
}
This is the default code that ships with the new ASP.NET MVC Web Project created in Visual Studio. Whatever the problem, it has been fixed.
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I have tested the below code and it works
var loginInformation = await AuthenticationManager.AuthenticateAsync(DefaultAuthenticationTypes.ExternalCookie);
if (loginInformation != null && loginInformation.Identity != null &&
loginInformation.Identity.IsAuthenticated)
{
var claimsIdentity = loginInformation.Identity;
var providerKeyClaim = claimsIdentity.FindFirst(ClaimTypes.NameIdentifier);
string providerKey = providerKeyClaim.Value;
string issuer = providerKeyClaim.Issuer;
string name = claimsIdentity.FindFirstValue(ClaimTypes.Name);
string emailAddress = claimsIdentity.FindFirstValue(ClaimTypes.Email);
}
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