Storing Value in HttpCookie - asp.net-mvc

Question

Using MVC.
Function Login(ByVal token As String) As ActionResult
Using client As New WebClient
Try
Dim jsonResponse As String = client.DownloadString(URL & "/Getuser&token=" & token)
Dim obj As UserInfo = Newtonsoft.Json.JsonConvert.DeserializeObject(Of UserInfo)(jsonResponse)
Response.Cookies.Add(New HttpCookie("token", token))
Response.Cookies.Add(New HttpCookie("user_id", obj.id))
Return Json(obj)
Catch ex As WebException
Return Content("ERROR")
Catch ex As Exception
Return Content("ERROR")
End Try
End Using
End Function
I am sending a token to this function.
Then Using this token to get the User Info from a certain API
Then Storing this token in a HttpCookie
All this has been working fine for almost a month,
Until it stopped working.
When I debugged, token had a value, and it stored it in the HttpCookie, but when I called Request.Cookies("token").Value it returned ''
Any help would be appreciated.
I did a trace on the Token..
I am writing the parameter "token" in a file before storing it in the cookie.
then I am writing the cookie Request.Cookies("token").Value in a file,
Function Login(ByVal token As String) As ActionResult
WriteToFile("TOKEN RECEIVED = ", token)
Using client As New WebClient
Try
Dim jsonResponse As String = client.DownloadString(URL & "/Getuser&token=" & token)
Dim obj As UserInfo = Newtonsoft.Json.JsonConvert.DeserializeObject(Of UserInfo)(jsonResponse)
Response.Cookies.Add(New HttpCookie("token", token))
Response.Cookies.Add(New HttpCookie("user_id", obj.id))
WriteToFile("TOKEN COOKIE = ", Request.Cookies("token").Value)
Return Json(obj)
Catch ex As WebException
Return Content("ERROR")
Catch ex As Exception
Return Content("ERROR")
End Try
End Using
End Function
it returns the following:
TOKEN RECEIVED = X132WEeRT3AASDV
TOKEN COOKIE =
When I try to write both Request and Response Cookies:
WriteToFile("TOKEN COOKIE = ", Request.Cookies("token").Value)
WriteToFile("TOKEN COOKIE = ", Response.Cookies("token").Value)
Request.Cookies("token").Value Returns Empty String
Response.Cookies("token").Value Returns Actual Value

Answer 1

Maybe your cookie just expire after one month? When using cookies don't forget to set expiration date, and check web browser settings (example: if you are using "tor browser bundle" this can be an issue).
HttpCookie myCookie = new HttpCookie("UserSettings");
myCookie["Font"] = "Arial";
myCookie["Color"] = "Blue";
myCookie.Expires = DateTime.Now.AddDays(1d);
Response.Cookies.Add(myCookie);
https://msdn.microsoft.com/en-us/library/78c837bd%28v=vs.140%29.aspx?cs-save-lang=1&cs-lang=vb#code-snippet-1

Answer 2

Make sure you access the cookies only during the actual Http request. Maybe you have changed the way (or place where) you call this function.

Answer 3

This is an old question on SO but for those interested, .NET team has created a new method to properly handle cookies.
This is available in .NET 4.7.1 and not earlier versions:
See under the section ASP.NET HttpCookie parsing here
https://blogs.msdn.microsoft.com/dotnet/2017/09/13/net-framework-4-7-1-asp-net-and-configuration-features/