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=iso-8859-1">
<title>Login</title>
</head>
<BODY bgcolor="#f79900">
<form action="LOGIN.HTM" 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.speedstream.com"><img border="0"
src="IMAGE/SIELOGOBLACK.JPG" 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"> </td>
<td width="50%" height="19"> </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.WebException' 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.
InitializeComponent()
'Add any initialization after the InitializeComponent() 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.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'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.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Dim resources As System.Resources.ResourceManager = New
System.Resources.ResourceManager(GetType(Form1))
Me.lblMyIp = New System.Windows.Forms.Label
Me.txtMyIp = New System.Windows.Forms.TextBox
Me.SuspendLayout()
'
'lblMyIp
'
Me.lblMyIp.Location = New System.Drawing.Point(8, 8)
Me.lblMyIp.Name = "lblMyIp"
Me.lblMyIp.Size = New System.Drawing.Size(56, 23)
Me.lblMyIp.TabIndex = 0
Me.lblMyIp.Text = "My Ip:"
'
'txtMyIp
'
Me.txtMyIp.Location = New System.Drawing.Point(64, 8)
Me.txtMyIp.Multiline = True
Me.txtMyIp.Name = "txtMyIp"
Me.txtMyIp.Size = New System.Drawing.Size(376, 248)
Me.txtMyIp.TabIndex = 1
Me.txtMyIp.Text = ""
'
'Form1
'
Me.AutoScaleBaseSize = 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.Regular, System.Drawing.GraphicsUnit.Point,
CType(0, Byte))
Me.Icon = CType(resources.GetObject("$this.Icon"), System.Drawing.Icon)
Me.MaximizeBox = False
Me.MinimizeBox = False
Me.Name = "Form1"
Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScree n
Me.Text = "MyIpReader"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
txtMyIp.Text = ReadHTMLPage(http://192.168.1.1:88/login.htm)
End Sub
Public Function ReadHTMLPage(ByVal 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.Create(url)
objRequest.Method = "POST"
objRequest.ContentLength = strPost.Length
objRequest.ContentType = "application/x-www-form-urlencoded"
Try
myWriter = New StreamWriter(objRequest.GetRequestStream())
myWriter.Write(strPost)
Catch e As Exception
Return e.Message
Finally
myWriter.Close()
End Try
Dim objResponse As HttpWebResponse = objRequest.GetResponse()
Dim sr As StreamReader
sr = New StreamReader(objResponse.GetResponseStream())
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.
