Problem: new session after response.redirect when calling via httpwebrequest

Question

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When I set a session value then redirect to another page I am able to retrieve the session value. As follows:

test-set.aspx

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Session("test") = "hello world!"
    Response.Redirect("test-get.aspx")
End Sub

test-get.aspx

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Response.Write("test = " & CType(Session("test"), String))
End Sub

The above results:

test = hello world!

However, when trying this via a HTTPWebRequest a new session is created for the redirected page.

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Dim TestRequest As Net.HttpWebRequest = CType(System.Net.WebRequest.Create(Me.Request.Url.GetLeftPart(UriPartial.Authority) & "/test-set.aspx"), Net.HttpWebRequest)
    TestRequest.Method = "GET"
    Using TestResponse As Net.HttpWebResponse = CType(TestRequest.GetResponse, Net.HttpWebResponse)
        Using Reader As IO.StreamReader = New IO.StreamReader(TestResponse.GetResponseStream)
            Response.Write(Reader.ReadToEnd)
        End Using
    End Using
End Sub

Using HTTPWebRequest results as:

test =

So the HTTPWebRequest retrieve the output from the redirected page but the redirected page is opened in a new session.

How can I open the redirected page in the same session it was redirected from?

What I have tried:

HttpWebRequest.AllowAutoRedirect

HttpWebRequest.MaximumAutomaticRedirections

HttpWebRequest.KeepAlive

HttpWebRequest.UseDefaultCredentials

Response.Redirect("test-get.aspx, True")

Response.Redirect("test-get.aspx, False")

Posted 15-Mar-19 16:48pm

Inology

Updated 17-Mar-19 10:32am

v2

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Comments

F-ES Sitecore 16-Mar-19 7:39am

Pages accessed via the browser can access your session because they send the session id as a cookie. When you create a request yourself via code it will only add to that request the things you tell it to add. If you want the page you are requesting to access the session then you'll need to add the session id as a cookie to the request you're sending.

You'll have to google for the exact code but it's going to be something along the lines of what appears here

http://geekswithblogs.net/xlinesonegoal/archive/2008/10/10/send-cookie-in-http-header-webrequest-asp.net-c-web-services.aspx

Er Avinash Kunnure 16-Mar-19 7:48am

You are right

Inology 16-Mar-19 21:17pm

thank you very much, that worked a treat!

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Inology · Accepted Answer · 2019-03-17T10:32:00

As F-ES Sitecore mentioned in the comment, I had to add the session ID. This was simply done with one line of code before GetResponse:

TestRequest.CookieContainer = New Net.CookieContainer()

So the updated request looks like:

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Dim TestRequest As Net.HttpWebRequest = CType(System.Net.WebRequest.Create(Me.Request.Url.GetLeftPart(UriPartial.Authority) & "/test-set.aspx"), Net.HttpWebRequest)
    TestRequest.Method = "GET"
    TestRequest.CookieContainer = New Net.CookieContainer()
    Using TestResponse As Net.HttpWebResponse = CType(TestRequest.GetResponse, Net.HttpWebResponse)
        Using Reader As IO.StreamReader = New IO.StreamReader(TestResponse.GetResponseStream)
            Response.Write(Reader.ReadToEnd)
        End Using
    End Using
End Sub