protected override async Task <AuthenticationTicket> GetUserInformationAsync(AuthenticationProperties properties, TokenResponse tokens)
{
string graphAddress = Options.UserInformationEndpoint + "?access_token=" + Uri.EscapeDataString(tokens.AccessToken);
if (Options.SendAppSecretProof)
{
graphAddress += "&appsecret_proof=" + GenerateAppSecretProof(tokens.AccessToken);
}
var graphResponse = await Backchannel.GetAsync(graphAddress, Context.RequestAborted);
graphResponse.EnsureSuccessStatusCode();
string text = await graphResponse.Content.ReadAsStringAsync();
JObject user = JObject.Parse(text);
var context = new FacebookAuthenticatedContext(Context, Options, user, tokens);
context.Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType);
if (!string.IsNullOrEmpty(context.Id))
{
context.Identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, context.Id, ClaimValueTypes.String, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.UserName))
{
context.Identity.AddClaim(new Claim(ClaimsIdentity.DefaultNameClaimType, context.UserName, ClaimValueTypes.String, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Email))
{
context.Identity.AddClaim(new Claim(ClaimTypes.Email, context.Email, ClaimValueTypes.String, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.Name))
{
context.Identity.AddClaim(new Claim("urn:facebook:name", context.Name, ClaimValueTypes.String, Options.AuthenticationType));
// Many Facebook accounts do not set the UserName field. Fall back to the Name field instead.
if (string.IsNullOrEmpty(context.UserName))
{
context.Identity.AddClaim(new Claim(ClaimsIdentity.DefaultNameClaimType, context.Name, ClaimValueTypes.String, Options.AuthenticationType));
}
}
if (!string.IsNullOrEmpty(context.Link))
{
context.Identity.AddClaim(new Claim("urn:facebook:link", context.Link, ClaimValueTypes.String, Options.AuthenticationType));
}
context.Properties = properties;
await Options.Notifications.Authenticated(context);
return(new AuthenticationTicket(context.Identity, context.Properties));
}
/// <summary>
/// Invoked whenever Facebook succesfully authenticates a user.
/// </summary>
/// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
/// <returns>A <see cref="Task"/> representing the completed operation.</returns>
public virtual Task Authenticated(FacebookAuthenticatedContext context)
{
return(OnAuthenticated(context));
}
