trying to login into https web site via <WhatEverWorks>.net


G

Gill Bates

I'm trying to login to a banking site
(https://www.providentconnection.com) using vb.net. I've tried many
variations of WebClient and HttpWebRequest; none of which I've got to
work. My latest version is:
Dim myWebClient As New WebClient

Dim nvc As New NameValueCollection

nvc.Add("Login", username)
nvc.Add("Password", password)
nvc.Add("ValidationReq", "1")
nvc.Add("WhichBrowser", "IE")
nvc.Add("pgBrowserVersion", "4")

url = "https://www.providentconnection.com...ationReq=1&WhichBrowser=IE&pgBrowserVersion=4"

myWebClient.Headers.Add("Content-Type",
"application/x-www-form-urlencoded")
' Upload the NameValueCollection.
Dim byts() As Byte = New Byte() {}
Dim responseArray As Byte() = myWebClient.UploadData(url, "POST",
byts)

Dim sw As New StreamWriter("trace.html")
Dim rspTxt = "Response received was :" +
Encoding.ASCII.GetString(responseArray)

I've tried the name value pairs, and the url (?) encoded formats w &
w/o HttpWebRequest and WebClient.

The content of the login page is:
<link href=styles.css rel="stylesheet">

<html>
<head>
<meta NAME="GENERATOR" Content="DreamWeaver">
<title>Login to Provident's Commercial Internet Banking</title>
<link href="stylesnav.css" rel=stylesheet>

<body background="images/top/topbkgd.gif" class=body2 topmargin=0
leftmargin=0>
<table cellpadding=0 cellspacing=0 border=0 height=80 width=100%>
<tr>
<td width=160><img src="images/top/logo.gif" height=100
width=180></td>

<td width=100%><img src="images/top/title.gif" height=100></td>
</tr>
</table>
<center>
<form name=RequestForm onSubmit="return CheckBlank()" method="POST"
action="login.asp" >
<table width=400 cellspacing=0 cellpadding=0>
<tr><td colspan=2 class=information>Please enter your User Name and
Password below:</td></tr>
<tr>
<td class=informationb>User Name:</td>
<td><input class=input type=text name="Login" size="10"></td>
</tr>
<tr>
<td class=informationb>Password:</td>
<td><input class=input type=password name="Password" size="10"></td>
</tr>
<tr><td>&nbsp</td></tr>
<tr><td>&nbsp</td><td colspan=><input class=buttons type="submit"
value="Login" name="submit"></td></tr>
</table>
</center>
<input type="hidden" name="ValidationReq" value="1">
<input type="hidden" name="WhichBrowser" value="IE">
<input type="hidden" name="pgBrowserVersion" value="4">
</form>
</body>
</html>


<script Language="JavaScript">
document.forms["RequestForm"].elements["Login"].focus();

function CheckBlank(){
if (document.forms[0].Login.value == "" ||
document.forms[0].Password.value == ""){
window.alert("Please enter a valid user name and password");
return false;
}
else{
document.forms[0].WhichBrowser.value = navigator.appName;
document.forms[0].pgBrowserVersion.value = navigator.appVersion;
return true;
}
}
</script>



All I ever get in response, is the same page. No error, no nothing...
If I try with a browser and enter "bad" values for user/pw; i get a
slightly diff version saying bad user/pw (this I'm not getting with
the vb.net code)

Any help would be appreciated!! kinda on a tight deadline here...

Gill
 
Ad

Advertisements

N

Nick Malik

not sure why your URL is coded for GET call while your are obviously trying
to do a POST call.

The receiving end may be confused by that.

Also, since this an HTTPS session, and the server is probably load balanced,
you will need to get the Login page, collect the cookies, and send them back
on the POST request and all subsequent requests. This is nearly always a
requirement, because load balancers can provide the SSL decoding most
efficiently when they can piggyback a session variable to determine which
system is connected once SSL is stripped off.

Hope this helps,
--- Nick

Gill Bates said:
I'm trying to login to a banking site
(https://www.providentconnection.com) using vb.net. I've tried many
variations of WebClient and HttpWebRequest; none of which I've got to
work. My latest version is:
Dim myWebClient As New WebClient

Dim nvc As New NameValueCollection

nvc.Add("Login", username)
nvc.Add("Password", password)
nvc.Add("ValidationReq", "1")
nvc.Add("WhichBrowser", "IE")
nvc.Add("pgBrowserVersion", "4")

url = "https://www.providentconnection.com/Login.asp?Login=plugh&Password=xyzzy&Va
lidationReq=1&WhichBrowser=IE&pgBrowserVersion=4"

myWebClient.Headers.Add("Content-Type",
"application/x-www-form-urlencoded")
' Upload the NameValueCollection.
Dim byts() As Byte = New Byte() {}
Dim responseArray As Byte() = myWebClient.UploadData(url, "POST",
byts)

Dim sw As New StreamWriter("trace.html")
Dim rspTxt = "Response received was :" +
Encoding.ASCII.GetString(responseArray)

I've tried the name value pairs, and the url (?) encoded formats w &
w/o HttpWebRequest and WebClient.

The content of the login page is:
<link href=styles.css rel="stylesheet">

<html>
<head>
<meta NAME="GENERATOR" Content="DreamWeaver">
<title>Login to Provident's Commercial Internet Banking</title>
<link href="stylesnav.css" rel=stylesheet>

<body background="images/top/topbkgd.gif" class=body2 topmargin=0
leftmargin=0>
<table cellpadding=0 cellspacing=0 border=0 height=80 width=100%>
<tr>
<td width=160><img src="images/top/logo.gif" height=100
width=180></td>

<td width=100%><img src="images/top/title.gif" height=100></td>
</tr>
</table>
<center>
<form name=RequestForm onSubmit="return CheckBlank()" method="POST"
action="login.asp" >
<table width=400 cellspacing=0 cellpadding=0>
<tr><td colspan=2 class=information>Please enter your User Name and
Password below:</td></tr>
<tr>
<td class=informationb>User Name:</td>
<td><input class=input type=text name="Login" size="10"></td>
</tr>
<tr>
<td class=informationb>Password:</td>
<td><input class=input type=password name="Password" size="10"></td>
</tr>
<tr><td>&nbsp</td></tr>
<tr><td>&nbsp</td><td colspan=><input class=buttons type="submit"
value="Login" name="submit"></td></tr>
</table>
</center>
<input type="hidden" name="ValidationReq" value="1">
<input type="hidden" name="WhichBrowser" value="IE">
<input type="hidden" name="pgBrowserVersion" value="4">
</form>
</body>
</html>


<script Language="JavaScript">
document.forms["RequestForm"].elements["Login"].focus();

function CheckBlank(){
if (document.forms[0].Login.value == "" ||
document.forms[0].Password.value == ""){
window.alert("Please enter a valid user name and password");
return false;
}
else{
document.forms[0].WhichBrowser.value = navigator.appName;
document.forms[0].pgBrowserVersion.value = navigator.appVersion;
return true;
}
}
</script>



All I ever get in response, is the same page. No error, no nothing...
If I try with a browser and enter "bad" values for user/pw; i get a
slightly diff version saying bad user/pw (this I'm not getting with
the vb.net code)

Any help would be appreciated!! kinda on a tight deadline here...

Gill
 
Ad

Advertisements

G

Gill Bates

Indeed; it helped enormously!

I now have a working prototype; it was the Cookie that did the trick…
I had played around with the code until it was pretty screwed up in
the GET/POST ‘ing; that's now taken care of.

For any other poor souls; here's the working code… (needs polish)…

Thanks so much!!


Dim cookieJar As CookieContainer = New CookieContainer
Dim webReq As HttpWebRequest
Dim webResp As HttpWebResponse
Dim sr As StreamReader
Dim sw As StreamWriter
Dim payLoad As String
Dim txt As String


webReq = CType(WebRequest.Create(New Uri(urlString)),
HttpWebRequest)
webReq.CookieContainer = cookieJar
webReq.Credentials = CredentialCache.DefaultCredentials
webReq.UserAgent = "BGClient"
webReq.KeepAlive = True
webReq.Headers.Set("Pragma", "no-cache")
webReq.Timeout = 5000
webReq.Method = "GET"

' get login page
webResp = webReq.GetResponse

sr = New StreamReader(webResp.GetResponseStream)
txt = sr.ReadToEnd.Trim
sr.Close()
webResp.Close()

webReq = CType(WebRequest.Create(New Uri(urlString & uriString)),
HttpWebRequest)
webReq.CookieContainer = cookieJar
webReq.Credentials = CredentialCache.DefaultCredentials
webReq.UserAgent = "BGClient"
webReq.KeepAlive = True
webReq.Headers.Set("Pragma", "no-cache")
webReq.Timeout = 5000
webReq.Method = "POST"
webReq.ContentType = "application/x-www-form-urlencoded"

payLoad = "Login=gill&Password=bates&submit=Login&ValidationReq=1&WhichBrowser=Microsoft+Internet+Explorer&pgBrowserVersion=4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+.NET+CLR+1.1.4322;+.NET+CLR+1.0.3705)"

webReq.ContentLength = payLoad.Length
sw = New StreamWriter(webReq.GetRequestStream)
sw.Write(payLoad)
sw.Close()

' post login parms
webResp = webReq.GetResponse

sr = New StreamReader(webResp.GetResponseStream)
txt = sr.ReadToEnd.Trim
sr.Close()
webResp.Close()
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top