/*
 * Program:  PowerTCP Telnet Tool - AutoLogin Demo
 * Original Author:   Tony Priest
 * Date:     1/16/01
 *
 * Converted to ASP .NET by Jeff Cranford 8-6-01
 * Purpose:  To demonstrate how to use the PowerTCP Telnet Tool to
 * automate the process of logging into a Telnet server in the .NET environment.
 */
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace AutoLogin
{
	/// <summary>
	/// Summary description for WebForm1.
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label lblServer;
		protected System.Web.UI.WebControls.TextBox txtServer;
		protected System.Web.UI.WebControls.Label lblLoginPrompt;
		protected System.Web.UI.WebControls.TextBox txtLoginPrompt;
		protected System.Web.UI.WebControls.Label lblUsername;
		protected System.Web.UI.WebControls.TextBox txtUsername;
		protected System.Web.UI.WebControls.Label lblPassPrompt;
		protected System.Web.UI.WebControls.TextBox txtPassPrompt;
		protected System.Web.UI.WebControls.Label lblPass;
		protected System.Web.UI.WebControls.TextBox txtPass;
		protected System.Web.UI.WebControls.Label lblCommand;
		protected System.Web.UI.WebControls.TextBox txtCommand;
		protected System.Web.UI.WebControls.Button Button1;
		protected System.Web.UI.WebControls.Label lblResults;

		// telnet control
		protected DartTelnetDotnet.Telnet Telnet1 = new DartTelnetDotnet.Telnet();
	
		public WebForm1()
		{
			Page.Init += new System.EventHandler(Page_Init);
		}

		private void Page_Load(object sender, System.EventArgs e)
		{
			// Put user code to initialize the page here
	
		}

		private void Page_Init(object sender, EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
		}

		#region Web Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.Button1.Click += new System.EventHandler(this.Button1_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void Button1_Click(object sender, System.EventArgs e)
		{
			string data = "";
			Telnet1.Timeout = 15000;
			lblResults.Text = "";
			string tempstring = "";

			// .NET's way of translating the Trace method, we must
			// pass a ref obj that has been set equal to a string containing
			// our filename
			object tempobj = new Object();
			tempstring = "C:\\Telnettrace.txt";
			tempobj = tempstring;

			Telnet1.Trace(ref tempobj, true, true, "\nSent: " , "\nReceived: ");


			bool connected = false;

			AddResult("Connecting to " + txtServer.Text + "...\r\n");
			try
			{
				Telnet1.Connect(txtServer.Text, 23, "", 0);
				connected = true;
			}
			catch(Exception ConnectError)
			{
				AddResult("Error: " + ConnectError.Message);
			}
			if(connected)
			{

				// for the Telnet control's methods (Search, Send, etc) .NET requires we pass a ref obj
				object objdata = new Object();
				object objtoken = new Object();
				object objsend = new Object();

				objdata = data;
				objtoken = txtLoginPrompt.Text;
				objsend = txtUsername.Text + "\r\n";

				AddResult("Connect successful, attempting to login...\r\n");
				try
				{
					// search for login prompt
					Telnet1.Search(ref objdata, ref objtoken);
					AddResult(objdata.ToString());

					// login prompt found, send username
					Telnet1.Send(ref objsend, 0);
					
					objdata = "";
					objtoken = "";
					objtoken = txtPassPrompt.Text;

					// search for password prompt
					Telnet1.Search(ref objdata, ref objtoken);
					AddResult(objdata.ToString());
					objsend = "";
					objsend = txtPass.Text + "\r\n";

					// password prompt found, send password
					Telnet1.Send(ref objsend, 0);
					
					objdata = "";
					objtoken = "";

					objtoken = txtCommand.Text;

					//retrieve all data up until command prompt and display
					Telnet1.Search(ref objdata, ref objtoken);
					AddResult(objdata.ToString());
					AddResult("SUCCESS!");
				}
				catch(Exception LoginError)
				{
					AddResult("Login Error: " + LoginError.Message);
				}
				finally
				{
					Telnet1.Close();
				}

			}
		}

		private void AddResult(string s)
		{
			lblResults.Text = lblResults.Text + ReadyForHtml(s);
		}
	
		string ReadyForHtml(string s)
		{
			// convert all text formatting characters to html formatting characters
			s = s.Replace(">", "&gt;");
			s = s.Replace("<", "&lt;");
			s = s.Replace(" ", "&nbsp;");
			s = s.Replace("\r\n ", "<br>&nbsp;");
			s = s.Replace("\r\n", "<br>");
			return s;
		}
	}
}