I am working on an application to screen scrape information from a web page.
I have the base code working but the problem is I have to login before I can
get the info I need. The page is hosted on my Router. When I go to the IP of
the router I get the following page.
<HTML>
<head>
<meta http-equiv="content-type" content="text/html;charset=is o-8859-1">
<title>Login</title>
</head>
<BODY bgcolor="#f7990 0">
<form action="LOGIN.H TM" method="post" name="tF">
<input type="hidden" name="page" value="login">
<table border="0" width="100%" height="184" cellspacing="0" >
<tr>
<td width="100%" height="103" colspan="2" align="center">
<a href="http://support.speedst ream.com"><img border="0"
src="IMAGE/SIELOGOBLACK.JP G" width="270" height="40"></a>
</td>
</tr>
<tr>
<td width="100%" height="19" colspan="2" align="center">
<H2><font face="Arial, Helvetica, sans-serif" color="#FFFFFF" >Login
Screen </font></H2>
</td>
</tr>
<tr>
<td width="50%" height="19" align="right">
<font face="Arial, Helvetica, sans-serif" size="2"
color="#FFFFFF" >Password :</font></td>
<td width="50%" height="19" align="left">
<INPUT type="password" maxLength=12 size=9 name=pws></td><p>
</tr>
<tr>
<td width="50%" height="19">&nb sp;</td>
<td width="50%" height="19">&nb sp;</td>
</tr>
<tr>
<td width="50%" height="19" align="right">
<INPUT type="submit" value=" Login ">
</td>
<td width="50%" height="19" align="left">
<INPUT class=button onclick=window. close(); type=button value= Cancel >
</td>
</tr>
</table>
</form></BODY>
</HTML>
Using the informaation on this page I have developed the following code for
my application, but ever time I run it I get:
An unhandled exception of type 'System.Net.Web Exception' occurred in
system.dll
Additional information: The underlying connection was closed: The server
committed an HTTP protocol violation.
My code is as follows:
Imports System.Net
Imports System.IO
Public Class Form1
Inherits System.Windows. Forms.Form
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeCompo nent()
'Add any initialization after the InitializeCompo nent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Disp ose()
End If
End If
MyBase.Dispose( disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.Componen tModel.IContain er
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents lblMyIp As System.Windows. Forms.Label
Friend WithEvents txtMyIp As System.Windows. Forms.TextBox
<System.Diagnos tics.DebuggerSt epThrough()> Private Sub InitializeCompo nent()
Dim resources As System.Resource s.ResourceManag er = New
System.Resource s.ResourceManag er(GetType(Form 1))
Me.lblMyIp = New System.Windows. Forms.Label
Me.txtMyIp = New System.Windows. Forms.TextBox
Me.SuspendLayou t()
'
'lblMyIp
'
Me.lblMyIp.Loca tion = New System.Drawing. Point(8, 8)
Me.lblMyIp.Name = "lblMyIp"
Me.lblMyIp.Size = New System.Drawing. Size(56, 23)
Me.lblMyIp.TabI ndex = 0
Me.lblMyIp.Text = "My Ip:"
'
'txtMyIp
'
Me.txtMyIp.Loca tion = New System.Drawing. Point(64, 8)
Me.txtMyIp.Mult iline = True
Me.txtMyIp.Name = "txtMyIp"
Me.txtMyIp.Size = New System.Drawing. Size(376, 248)
Me.txtMyIp.TabI ndex = 1
Me.txtMyIp.Text = ""
'
'Form1
'
Me.AutoScaleBas eSize = New System.Drawing. Size(7, 19)
Me.ClientSize = New System.Drawing. Size(448, 262)
Me.Controls.Add (Me.txtMyIp)
Me.Controls.Add (Me.lblMyIp)
Me.Font = New System.Drawing. Font("Times New Roman", 12.0!,
System.Drawing. FontStyle.Regul ar, System.Drawing. GraphicsUnit.Po int,
CType(0, Byte))
Me.Icon = CType(resources .GetObject("$th is.Icon"), System.Drawing. Icon)
Me.MaximizeBox = False
Me.MinimizeBox = False
Me.Name = "Form1"
Me.StartPositio n = System.Windows. Forms.FormStart Position.Center Screen
Me.Text = "MyIpReader "
Me.ResumeLayout (False)
End Sub
#End Region
Private Sub Form1_Load(ByVa l sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
txtMyIp.Text = ReadHTMLPage(http://192.168.1.1:88/login.htm)
End Sub
Public Function ReadHTMLPage(By Val url As String) As String
Dim result As String = ""
Dim strPost As String = "page=login&pws =password"
Dim myWriter As StreamWriter
Dim objRequest As HttpWebRequest = WebRequest.Crea te(url)
objRequest.Meth od = "POST"
objRequest.Cont entLength = strPost.Length
objRequest.Cont entType = "applicatio n/x-www-form-urlencoded"
Try
myWriter = New StreamWriter(ob jRequest.GetReq uestStream())
myWriter.Write( strPost)
Catch e As Exception
Return e.Message
Finally
myWriter.Close( )
End Try
Dim objResponse As HttpWebResponse = objRequest.GetR esponse()
Dim sr As StreamReader
sr = New StreamReader(ob jResponse.GetRe sponseStream())
result = sr.ReadToEnd()
sr.Close()
Return result
End Function
End Class
I can't figure out what I am doing wrong here? Any guidance would be
appreciated.
