Solved

HttpWebRequest Form Authentication Not Getting Past Login Page

Posted on 2010-09-03
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Last Modified: 2012-08-13
Hey Guys,

I am trying to use HTTPWebRequest to login to a site and then retrieve the page after login. However, it seems as if I can't get past the login. I also investigated with Fiddler and tried mimicking Fiddler almost completely and still no luck.

Any idea what I am doing wrong?

Thanks,
Mohammed
Dim webRequest As HttpWebRequest

Dim responseReader As StreamReader

Dim responseData As String

Dim postData As String = "login=testexpert@yahoo.com&password=testexpert"

Dim cookies As CookieContainer = New CookieContainer()

Dim requestWriter As StreamWriter



Try

'post form data to page

    strUrl = "https://www.ideeli.com/login"

    webRequest = HttpWebRequest.Create(strUrl)

    webRequest.Method = WebRequestMethods.Http.Post

    webRequest.ContentType = "application/x-www-form-urlencoded"

    webRequest.CookieContainer = cookies

    webRequest.ContentLength = postData.Length



    requestWriter = New StreamWriter(webRequest.GetRequestStream)

    requestWriter.Write(postData)

    requestWriter.Close()



'recieve cookie

    webRequest.GetResponse().Close()



'now we send the cookie

    webRequest = HttpWebRequest.Create("http://www.ideeli.com")

    webRequest.CookieContainer = cookies

    responseReader = New StreamReader(webRequest.GetResponse.GetResponseStream())

    responseData = responseReader.ReadToEnd()

    responseReader.Close()

    strRequestedHTML = responseData



    Return

Catch ex As Exception

    ErrorLabel.Text += "<br />There was an error going to this site: " + strUrl + "<br> Error: " + ex.Message

    Return

End Try

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Comment
Question by:mohali786
  • 2
3 Comments
 
LVL 17

Expert Comment

by:Zhaolai
ID: 33600771
Tried your code. Here is the return page:
Is it what you expected?
Do you get any errors? If so, what errors?


Screenshot.PNG
0
 

Author Comment

by:mohali786
ID: 33600988
I get the same page. However, this is not the page that I want. If I tried going to Ideeli.com without being logged in I would get this page. If I tried the same while being logged in I would get the sales page. I want to see the sales page.
0
 

Accepted Solution

by:
mohali786 earned 0 total points
ID: 33601929
Here is the code to resolve that. Basically what I do different is to GET the non-authenticated cookie first and then POST that with my login information
Dim webRequest As HttpWebRequest

Dim responseReader As StreamReader

Dim responseData As String

Dim postData As String = "login=testexpert@yahoo.com&password=testexpert"

Dim cookies As CookieContainer = New CookieContainer()

Dim requestWriter As StreamWriter



Try

'get login page with cookies

    strUrl = "https://www.ideeli.com/login"

    webRequest = HttpWebRequest.Create(strUrl)

    webRequest.CookieContainer = cookies



'recieve non-authenticated cookie

    webRequest.GetResponse().Close()



'post form data to page

    strUrl = "https://www.ideeli.com/login"

    webRequest = HttpWebRequest.Create(strUrl)

    webRequest.Method = WebRequestMethods.Http.Post

    webRequest.ContentType = "application/x-www-form-urlencoded"

    webRequest.CookieContainer = cookies

    webRequest.ContentLength = postData.Length



    requestWriter = New StreamWriter(webRequest.GetRequestStream)

    requestWriter.Write(postData)

    requestWriter.Close()



'recieve authenticated cookie

    webRequest.GetResponse().Close()



'now we get the authenticated page

    webRequest = HttpWebRequest.Create("http://www.ideeli.com")

    webRequest.CookieContainer = cookies

    responseReader = New StreamReader(webRequest.GetResponse.GetResponseStream())

    responseData = responseReader.ReadToEnd()

    responseReader.Close()

    strRequestedHTML = responseData





Catch ex As Exception

    ErrorLabel.Text += "<br />There was an error going to this site: " + strUrl + "<br> Error: " + ex.Message

    Return

End Try

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