Can't find working example of getting first_name claim using Facebook rc2

[mikes-gh]

I can get email and name from the authentication request But even looking through the source I can't work out how to get first_name or last_name.
I think I need to use the userendpoint.

It would be great if this could be added to the social sample.

[mikes-gh]

Looking at the source for

FacebookHandler

all the fields are added to the UserEndPoint request but only a few fields (hard coded) are read from the json. So even if I put first_name in fields collection and I see the value in the json reponse it is not added to the claims collection.
Still not sure how to proceed.

[Tratcher]

Hook into Options.Events.CreatingTicket and you can add additional claims.

[mikes-gh]

Ok Ill try and work that out myself are there any docs?

I think it would be useful to

Add all the "free" Facebook fields from email and public_profile to the FacebookHelpers and FacebookHandler.
These include

email scope

email (already mapped)

public_profile scope

id (already mapped)
name (already mapped)
first_name (ClaimTypes.GivenName)
last_name (ClaimTypes.Surname)
age_range (urn:facebook:age_range)
link (already mapped)
gender (ClaimTypes.Gender)
locale (ClaimTypes.Locality)
timezone (urn:facebook:timezone)
updated_time (urn:facebook:updated_time)
verified (urn:facebook:verified)

Would you accept a PR for this?

[mikes-gh]

@Tratcher

Would you accept a PR for the above?
Its a very simple change.

[VijayBhatter]

I am stuck in my project as there is not much documentation on how to Hook into Options.Events.CreatingTicket and add additional claims.

And code example would be of great help.

[mikes-gh]

@Tratcher Trouble with this event is the JSON responce is no longer available and you have to construct a new request with the extra fields repeating all the logic in the handler and helper and resulting in an extra trip to the facebok userinfoenpoint.
As soon as this repo gets building again I have a change to add all the public_profile fields to the helper and handler plus a better set of defaults so we can have a minimal configure like the Google authentication.

[Tratcher]

The raw JSON should be available in OAuthCreatingTicketContext.TokenResponse.Response that's passed into CreatingTicket.

[mikes-gh]

That only gives the JSON for the access_token not for the fields requested from the userinfoendpoint.
Those are already saved as claims by the FacebookHandler.
The only way to get more fields is by resubmitting a new request to the userinfoendpoint and parsing the response

[Tratcher]

Ah, wrong field. Check OAuthCreatingTicketContext.User

[mikes-gh]

Got it
Man thats obscure especially as User in HttpContext is normally a claims principal.
Very confusing.

[mikes-gh]

The working code for reference

app.UseFacebookAuthentication(options =>
            {
                options.AppId = "9999999999999";
                options.AppSecret = "123456789";
                options.Scope.Add("email");
                options.Scope.Add("public_profile");
                options.Fields.Add("name");
                options.Fields.Add("email");
                options.Fields.Add("first_name");
                options.Fields.Add("last_name");
                // Only if you use a proxy server
                options.BackchannelHttpHandler = new HttpClientHandler()
                {
                    Proxy = new WebProxy("http://proxyserver:3128")
                };
                options.Events = new OAuthEvents
                {
                    OnCreatingTicket =  context =>
                    {
                        var user =  context.User;

                        var firstName = user.Value<string>("first_name");
                        if (!string.IsNullOrEmpty(firstName))
                        {
                            context.Identity.AddClaim(new Claim(
                                ClaimTypes.GivenName, firstName,
                                ClaimValueTypes.String, context.Options.ClaimsIssuer));
                        }

                        var lastName = user.Value<string>("last_name");
                        if (!string.IsNullOrEmpty(lastName))
                        {
                            context.Identity.AddClaim(new Claim(
                                ClaimTypes.Surname, lastName,
                                ClaimValueTypes.String, context.Options.ClaimsIssuer));
                        }
                        return Task.FromResult(0);
                    }
                };
            });

[mikes-gh]

@VijayBhatter the above should help.

[VijayBhatter]

Thank you @mikes-gh for the help.