protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
string code = null;
string state = null;
IReadableStringCollection query = Request.Query;
IList <string> values = query.GetValues("code");
if (values != null && values.Count == 1)
{
code = values[0];
}
values = query.GetValues("state");
if (values != null && values.Count == 1)
{
state = values[0];
}
properties = Options.StateDataFormat.Unprotect(state);
if (properties == null)
{
return(null);
}
// OAuth2 10.12 CSRF
if (!ValidateCorrelationId(properties, _logger))
{
return(new AuthenticationTicket(null, properties));
}
string requestPrefix = Request.Scheme + "://" + Request.Host;
string redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
var postContent = new StringContent("grant_type=authorization_code" +
"&code=" + Uri.EscapeDataString(code) +
"&redirect_uri=" + Uri.EscapeDataString(redirectUri) +
"&client_id=" + Uri.EscapeDataString(Options.ClientId) +
"&client_secret=" + Uri.EscapeDataString(Options.ClientSecret));
HttpResponseMessage tokenResponse =
await _httpClient.PostAsync(TokenEndpoint, postContent, Request.CallCancelled);
tokenResponse.EnsureSuccessStatusCode();
string text = await tokenResponse.Content.ReadAsStringAsync();
dynamic form = JObject.Parse(text);
string accessToken = form.access_token;
JObject user = form.user;
var context = new InstagramAuthenticatedContext(Context, user, accessToken)
{
Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType)
};
if (!string.IsNullOrEmpty(context.Id))
{
context.Identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, context.Id, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.UserName))
{
context.Identity.AddClaim(new Claim(ClaimsIdentity.DefaultNameClaimType, context.UserName, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.FullName))
{
context.Identity.AddClaim(new Claim("urn:instagram:fullName", context.FullName, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.ProfilePicture))
{
context.Identity.AddClaim(new Claim("urn:instagram:profilePic", context.ProfilePicture, XmlSchemaString, Options.AuthenticationType));
}
context.Properties = properties;
await Options.Provider.Authenticated(context);
return(new AuthenticationTicket(context.Identity, context.Properties));
}
catch (Exception ex)
{
_logger.WriteError(ex.Message);
}
return(new AuthenticationTicket(null, 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(InstagramAuthenticatedContext context)
{
return OnAuthenticated(context);
}
/// <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(InstagramAuthenticatedContext context)
{
return(OnAuthenticated(context));
}