Free "tail -f" Tool for all Platforms: Tail for Windows, Tail for Linux and Tail for Mac

/******************************************************************************
 
Copyright (C) 2006  MakeLogic

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA


Date		: 14th December 2005
Authors		: MakeLogic

Design		: Ujjwal
Developer	: Dharma

********************************************************************************/

package com.makeLogic;

import java.awt.*;
import java.lang.reflect.Method;
import java.net.*;
import java.io.*;
import java.util.*;

import javax.swing.*;
import javax.swing.text.html.*;

import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;

import com.makeLogic.utils.Trace;

public class CheckForNewUpdates implements Runnable
{
	Component parentComponent;
	final public static String MODULE_NAME = "MakeLogicTail_2.1.0";
	public static String uid;
	String updateLink = "http://www.makelogic.com";

	String updateURL = "http://makelogictail.sourceforge.net/cgi-bin/MakeLogicTail.cgi";

	String os_name = "";
	String os_version = "";

	String java_version = "";
	String jvm_version = "";
	String jrt_version = "";
	
	String jvm_vendor = "";
	String jrt_name = "";

	Hashtable paramsHashtable;


	public CheckForNewUpdates(Component parent)
	{

		Trace.enter("CheckForNewUpdates.CheckForNewUpdates");
		
		parentComponent = parent;

		//..Read the uid from the properties file
		int maxValue = getMaxValue(Tail.tailMDI.keySetValues);

		for(int i = 1 ; i < maxValue+1; i++)
		{
			try
			{
				String tempString = Tail.tailMDI.keySetValues.getProperty(""+i);

				//..Verify if uid present or not
				if(tempString.startsWith("uid"))
				{

					tempString = tempString.substring(tempString.indexOf("=")+1);

					uid = tempString;

					break;
				}
			}
			catch(Exception exp)
			{
				//..Exception thrown when the property value does not exists
				//..Do Nothing
				Trace.exception(exp);
			}
		}


		if(uid==null)
		{
			uid="0";
		}

		Thread thread = new Thread(this);
		thread.start();

		Trace.exit("CheckForNewUpdates.CheckForNewUpdates");
	}

	//..Call System.getProperty with exception handling
	public static String getProperty(String name)
	{
		String value = "";
		try
		{
			value = System.getProperty(name);
			
			//..Debug
			//..System.out.println("..ML.. :: "+name+"="+value);

			if(value == null)
			{
				value = "NOT_FOUND";
			}

			return value;
		}
		catch(Exception ex)
		{
			//..Debug
			//..System.out.println("..ML.. 1."+ex.getMessage());
			//..ex.printStackTrace();
			
			value = ex.getMessage();
			Trace.exception(ex);
			return value;
		}
	}

	public void run()
	{
		Trace.enter("CheckForNewUpdates.run");

		try
		{
			os_name = getProperty("os.name");
			os_version = getProperty("os.version");

			java_version = getProperty("java.version");
			jvm_version = getProperty("java.vm.version");
			jrt_version = getProperty("java.runtime.version");

			jvm_vendor = getProperty("java.vm.vendor");
			jrt_name = getProperty("java.runtime.name");

			//..Encode the ULR parameters
			String urlParameters = "";

			//..UID
			urlParameters += URLEncoder.encode("UID", "UTF-8") + "=" + URLEncoder.encode(uid, "UTF-8");
			//..Module Name
			urlParameters += "&" + URLEncoder.encode("ModuleName", "UTF-8") + "=" + URLEncoder.encode(CheckForNewUpdates.MODULE_NAME, "UTF-8");
			//..ut -> Usage Time
			urlParameters += "&" + URLEncoder.encode("ut", "UTF-8") + "=" + URLEncoder.encode(TailMDI.ut+"", "UTF-8");

			//..os_name
			urlParameters += "&" + URLEncoder.encode("os_name", "UTF-8") + "=" + URLEncoder.encode(os_name, "UTF-8");
			//..os_version
			urlParameters += "&" + URLEncoder.encode("os_version", "UTF-8") + "=" + URLEncoder.encode(os_version, "UTF-8");
			
			//..java_version
			urlParameters += "&" + URLEncoder.encode("java_version", "UTF-8") + "=" + URLEncoder.encode(java_version, "UTF-8");
			//..jvm_version
			urlParameters += "&" + URLEncoder.encode("jvm_version", "UTF-8") + "=" + URLEncoder.encode(jvm_version, "UTF-8");
			//..jrt_version
			urlParameters += "&" + URLEncoder.encode("jrt_version", "UTF-8") + "=" + URLEncoder.encode(jrt_version, "UTF-8");

			//..jvm_vendor
			urlParameters += "&" + URLEncoder.encode("jvm_vedor", "UTF-8") + "=" + URLEncoder.encode(jvm_vendor, "UTF-8");
			//..jrt_name
			urlParameters += "&" + URLEncoder.encode("jrt_name", "UTF-8") + "=" + URLEncoder.encode(jrt_name, "UTF-8");

			
			//String urlString = "http://makelogictail.sourceforge.net/cgi-bin/MakeLogicTail.cgi?UID="+uid+"&ModuleName="+CheckForNewUpdates.MODULE_NAME;
			//..String urlString = "http://makelogictail.sourceforge.net/cgi-bin/MakeLogicTail.cgi?UID="+uid+"&ModuleName="+CheckForNewUpdates.MODULE_NAME+"&ut="+TailMDI.ut;
			
			//..Build the complete URL with parameters
			String urlString = updateURL+"?"+urlParameters;

			//..Debug
			//..System.out.println("..ML.. URL STRING : "+urlString);

			URL url = new URL(urlString);
			InputStream is  = null;
                        
            //..Connection failed
            try{
                //Trace.message("Checking for updates");
				is = (InputStream)url.getContent();
            }
            catch(Exception ex)
            {
                //Trace.message("Checking for updates failed ....\n Check your internet settings");
				//..No Trace.exception line here
                Trace.exit("CheckForNewUpdates.run");
                return;
            }
                        
			BufferedReader reader = new BufferedReader( new InputStreamReader(is));
			
			String tempString = "";
			String fullString = "";

			while((tempString = reader.readLine())!=null)
			{
				fullString += tempString;
			}

			reader.close();

			StringTokenizer st = new StringTokenizer(fullString,";");
			String pair = "";
			String name = "";
			String value = "";

			paramsHashtable = new Hashtable();

			while(st.hasMoreTokens())
			{
				pair = st.nextToken();

				if(pair.equalsIgnoreCase("ok"))
				{
					//..set ut to 0
					TailMDI.ut = 0;

					break;
				}

				name = pair.substring(0,pair.indexOf("="));
				value = pair.substring(pair.indexOf("=")+1);

				paramsHashtable.put(name,value);

			}
			
			//..Show message if new version is available
			if(paramsHashtable.containsKey("msg"))
			{
				JEditorPane editorPane = new JEditorPane();
				editorPane.setEditorKit(new HTMLEditorKit()); 

				String html = "	<body bgcolor=\"#CBD9FA\" leftmargin=\"15\"  > "+
                    "<p align=\"center\"><font face=\"Verdana\" size=\"3\" >"+paramsHashtable.get("msg")+"</font></p>"+
					"<p align=\"center\"><font face=\"Verdana\" size=\"3\" ><a href=\""+ paramsHashtable.get("link") +"\">"+ paramsHashtable.get("link") +"</a></font></p>"+
					"<p align=\"center\">&nbsp;</p>"+
                    "</body>";
								
				editorPane.setText(html);
				editorPane.setEditable(false);
				editorPane.addHyperlinkListener(new HyperActive());

				JOptionPane.showMessageDialog(parentComponent, editorPane, "MakeLogic Tail", JOptionPane.INFORMATION_MESSAGE);
			}

			//..New UID
			if(paramsHashtable.containsKey("newuid"))
			{
				//..Write the new uid into properties file

				//..Find the uid from the properties
				//..Find it in the properties and update to new value
				int maxValue = getMaxValue(Tail.tailMDI.keySetValues);

				int i = 1;
				for(i = 1 ; i < maxValue+1; i++)
				{
					try
					{
						tempString = Tail.tailMDI.keySetValues.getProperty(""+i);

						//..Verify if uid present or not
						if(tempString.startsWith("uid"))
						{
							Tail.tailMDI.keySetValues.setProperty(""+i,"uid="+paramsHashtable.get("newuid").toString());
							break;
						}
					}
					catch(Exception exp)
					{
						//..Exception thrown when the property value does not exists
						//..Do Nothing
						Trace.exception(exp);
					}
				}

				//..If not found add a new entry
				if(i >= maxValue + 1)
				{
					Tail.tailMDI.keySetValues.setProperty(""+(maxValue+1),"uid="+paramsHashtable.get("newuid").toString());
				}

				//..Store the Properties into a file.
				try
				{
					Tail.tailMDI.keySetValues.store(new FileOutputStream(TailMDI.KEYSET_FILE),null);
				}
				catch(Exception ex)
				{
					Trace.exception(ex);
				}
			}		
		}
		catch(Exception excp)
		{
			//..Debug
			//..System.out.println("..ML.. 2." +excp.toString() );
			//..excp.printStackTrace();
			Trace.exception(excp);
		}

		Trace.exit("CheckForNewUpdates.run");
	}

	//..Gets the maximum value in the properties
	public int getMaxValue(Properties keySetValues)
	{
		Trace.enter("CheckForNewUpdates.getMaxValue");

		int maxValue = 0;
		int verifyUpto = keySetValues.size()+1;

		for(int i = 1 ; i < verifyUpto; i++)
		{
			try
			{
				String tempString = keySetValues.getProperty(""+i);
				
				if(tempString == null)
                                {
                                    verifyUpto++;
                                    continue;
                                }

				//..Set the maxValue
				if(i > maxValue)
				{
					maxValue = i;
				}
			}
			catch(Exception exp)
			{
				//..Exception thrown when the property value does not exists
				verifyUpto++;
				Trace.exception(exp);
			}
		}

		Trace.exit("CheckForNewUpdates.getMaxValue");

		return maxValue;
	}

	public static void main(String[] args)
	{
		Trace.enter("CheckForNewUpdates.main");

        CheckForNewUpdates c = new CheckForNewUpdates(null);

		Trace.exit("CheckForNewUpdates.main");
	}
}