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Spoofing the Referrer using HttpWebRequest

dave123aspx

I noticed the article the other day on your website about "Spoofing the Referer During a Web Request" Immediately after reading it I was wondering if you can do this using ASP.NET, the answer is a resounding "YES, of course!". This works because the http standards allow the client to actually dictate the HTTP_Referer variable.

Here is the code:


Function FetchURL(SomeURL as String, Referer As String) as String
    Dim WebResp as HTTPWebResponse
    Dim HTTPGetRequest as HttpWebRequest
    Dim sr As StreamReader
    dim myString as String
    HTTPGetRequest = DirectCast(WebRequest.Create(SomeURL),HttpWebRequest)
    HTTPGetRequest.KeepAlive = false
    HTTPGetRequest.Referer = Referer
    WebResp = HTTPGetRequest.GetResponse()
    sr = new StreamReader(WebResp.GetResponseStream(), Encoding.ASCII)
    myString = sr.ReadToEnd()
    Return myString
End Function

You can then call this using the following:

Dim PageString As String
PageString = FetchURL("http://www.google.com/","http://www.microsoft.com")

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