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);
}
if (!ValidateCorrelationId(properties, _logger))
{
return(new AuthenticationTicket(null, properties));
}
string requestPrefix = Request.Scheme + Uri.SchemeDelimiter + Request.Host;
string redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
string tokenRequestParameters = "client_id=" + Uri.EscapeDataString(Options.ClientId) +
"&client_secret=" + Uri.EscapeDataString(Options.ClientSecret) +
"&grant_type=authorization_code" +
"&redirect_uri=" + redirectUri +
"&code=" + Uri.EscapeDataString(code);
HttpWebRequest httpWReq = (HttpWebRequest)WebRequest.Create(TokenEndpoint);
ASCIIEncoding encoding = new ASCIIEncoding();
byte[] data = encoding.GetBytes(tokenRequestParameters);
httpWReq.Method = "POST";
httpWReq.ContentType = "application/x-www-form-urlencoded";
httpWReq.ContentLength = data.Length;
httpWReq.Timeout = System.Threading.Timeout.Infinite;
using (Stream stream = httpWReq.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
//Send token request as a POST message
HttpWebResponse response = (HttpWebResponse)httpWReq.GetResponse();
string responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
//set expiration of the access token to 60 days
string expires = "5183999";
JObject JResponse = JObject.Parse(responseString);
JToken JAccessToken = JResponse["access_token"];
JToken JUser = JResponse["user"];
string accessToken = JAccessToken.ToString();
JObject user = JUser as JObject;
var context = new InstagramAuthenticatedContext(Context, user, accessToken, expires);
context.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(ClaimTypes.Name, context.FullName, XmlSchemaString, Options.AuthenticationType));
}
if (!string.IsNullOrEmpty(context.ProfilePicture))
{
context.Identity.AddClaim(new Claim("urn:instagram:profilepicture", 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));
}
public virtual Task Authenticated(InstagramAuthenticatedContext context)
{
return(OnAuthenticated(context));
}