public static FacebookRequest GetFacebookDetailsFromRequest(string rawSignedRequest)
{
if (string.IsNullOrEmpty(rawSignedRequest))
{
return(null);
}
try
{
var facebookRequest = new FacebookRequest();
facebookRequest.RawSignedRequest = rawSignedRequest;
facebookRequest.IsValid = false;
string[] signedRequestSplit = rawSignedRequest.Split('.');
string expectedSignature = signedRequestSplit[0];
string payload = signedRequestSplit[1];
var decodedJson = ReplaceSpecialCharactersInSignedRequest(payload);
var base64JsonArray = Convert.FromBase64String(decodedJson.PadRight(decodedJson.Length + ((4 - (decodedJson.Length % 4)) % 4), '='));
var encoding = new UTF8Encoding();
FaceBookData faceBookData = encoding.GetString(base64JsonArray).FromJson <FaceBookData>();
if (faceBookData.algorithm == "HMAC-SHA256")
{
facebookRequest.IsValid = true;
facebookRequest.Algorithm = faceBookData.algorithm;
facebookRequest.ProfileId = faceBookData.profile_id;
facebookRequest.AppData = faceBookData.app_data;
facebookRequest.OauthToken = !string.IsNullOrEmpty(faceBookData.oauth_token) ? faceBookData.oauth_token : string.Empty;
facebookRequest.Expires = ConvertToTimestamp(faceBookData.expires);
facebookRequest.IssuedAt = ConvertToTimestamp(faceBookData.issued_at);
facebookRequest.UserID = !string.IsNullOrEmpty(faceBookData.user_id) ? faceBookData.user_id : string.Empty;
facebookRequest.PageId = faceBookData.page.id;
facebookRequest.PageLiked = faceBookData.page.liked;
facebookRequest.PageUserAdmin = faceBookData.page.admin;
facebookRequest.UserLocale = faceBookData.user.locale;
facebookRequest.UserCountry = faceBookData.user.country;
facebookRequest.UserMinAge = faceBookData.user.age.min;
facebookRequest.UserMaxAge = faceBookData.user.age.max;
}
return(facebookRequest);
}
catch (Exception)
{
return(null);
}
}
public static FacebookRequest GetFacebookDetailsFromRequest(string rawSignedRequest)
{
if (string.IsNullOrEmpty(rawSignedRequest)) return null;
try
{
var facebookRequest = new FacebookRequest();
facebookRequest.RawSignedRequest = rawSignedRequest;
facebookRequest.IsValid = false;
string[] signedRequestSplit = rawSignedRequest.Split('.');
string expectedSignature = signedRequestSplit[0];
string payload = signedRequestSplit[1];
var decodedJson = ReplaceSpecialCharactersInSignedRequest(payload);
var base64JsonArray = Convert.FromBase64String(decodedJson.PadRight(decodedJson.Length + (4 - decodedJson.Length%4)%4, '='));
var encoding = new UTF8Encoding();
FaceBookData faceBookData = encoding.GetString(base64JsonArray).FromJson<FaceBookData>();
if (faceBookData.algorithm == "HMAC-SHA256")
{
facebookRequest.IsValid = true;
facebookRequest.Algorithm = faceBookData.algorithm;
facebookRequest.ProfileId = faceBookData.profile_id;
facebookRequest.AppData = faceBookData.app_data;
facebookRequest.OauthToken = !string.IsNullOrEmpty(faceBookData.oauth_token) ? faceBookData.oauth_token : "";
facebookRequest.Expires = ConvertToTimestamp(faceBookData.expires);
facebookRequest.IssuedAt = ConvertToTimestamp(faceBookData.issued_at);
facebookRequest.UserID = !string.IsNullOrEmpty(faceBookData.user_id) ? faceBookData.user_id : "";
facebookRequest.PageId = faceBookData.page.id;
facebookRequest.PageLiked = faceBookData.page.liked;
facebookRequest.PageUserAdmin = faceBookData.page.admin;
facebookRequest.UserLocale = faceBookData.user.locale;
facebookRequest.UserCountry = faceBookData.user.country;
facebookRequest.UserMinAge = faceBookData.user.age.min;
facebookRequest.UserMaxAge = faceBookData.user.age.max;
}
return facebookRequest;
}
catch(Exception)
{
return null;
}
}
