import java.awt.*;
import java.lang.*;
import java.applet.*;
import java.util.*;
import java.net.*;
import java.io.*;
public class Ghtml extends Applet
{
static Socket socket;
static InputStream in;
static OutputStream out;
static DataInputStream din;
static DataOutputStream dout;
Button button = null;
String rc = null;
protected Vector entries = null;
protected Vector header = null;
protected File file = null;
protected String name = null;
protected String e_mail = null;
protected String entry = null;
protected String date = null;
public void loadbook(String name)
{
File f = new File(name);
if(f.exists()&&f.canRead()) readFromFile(f);
else System.out.println("This file doesn't exist.");
}
public void init()
{
setBackground(Color.lightGray);
setForeground(Color.blue);
Font font = new Font("TimesRoman",Font.PLAIN,20);
setFont(font);
setLayout(new BorderLayout());
Panel p1=new Panel();
p1.add( button=new Button("Genernate"));
add("North",p1);
}
public boolean action(Event evt,Object what)
{
if (what.equals("Genernate")) // button pressed
{
loadbook("guestdata");
}
else return false;
return true;
}
public boolean fromHTML(String line)
{
int index = line.indexOf("| ");
if(index<0) return false;
line = line.substring(index+4);
index = line.indexOf(" | ");
if(index<0) return false;
name = line.substring(0,index).trim();
line = line.substring(index+4);
index = line.indexOf(" | ");
if(index<0) return false;
e_mail = line.substring(0,index).trim();
line = line.substring(index+4);
index = line.indexOf(" | ");
if(index<0) return false;
entry = line.substring(0,index).trim();
date = line.substring(index+4).trim();
return true;
}
public void readFromFile(File f)
{
file = f;
header = new Vector(5);
FileInputStream fin = null;
FileOutputStream fout = null;
try { fin = new FileInputStream(f);}
catch(Exception fe)
{
System.out.println("caught exception "+fe.getMessage());
header = null;
entries = null;
return;
}
try { fout = new FileOutputStream("ggg.html"); }
catch(IOException ioe)
{
System.out.println("warning: couldn't save guestbook");
return;
}
DataOutputStream dout = new DataOutputStream(fout);
try
{
dout.writeBytes("GuestBook\n\nTianchu Yang's GuestBook\n| Name : | E_mail : | URL address : | Date :\n");
dout.writeBytes(" |
|---|
| Tianchu Yang | e96tiaya@und.ida.liu.se | Weclome to mark my Guestbook | 20.6'97\n");
}
catch(IOException ioe2)
{
System.out.println("error while saving guestbook :");
try {dout.close(); fout.close();}
catch(Exception ce) {}
return;
}
DataInputStream din = new DataInputStream(fin);
String line = null;
boolean cont = true;
while(cont)
{
try { line = din.readLine();}
catch(Exception e)
{
System.out.println("caught exception "+e.getMessage());
try { din.close(); fin.close();}
catch(Exception ce) {}
header = null;
entries = null;
return;
}
if((line!=null)&&(!line.startsWith(" | | ")))
header.addElement(line+"\n");
else cont = false;
}
while(line!=null)
{
if(line.startsWith(" | ")) break;
else
{
GuestBookEntry entry = new GuestBookEntry();
if(entry.fromHTML(line))
{
System.out.println("That is OK");
}
else System.err.println("error parsing line "+line);
}
try {
line = din.readLine();
String line1 = fromhtml(line);
System.out.println(line1);
dout.writeBytes(line1);
}
catch(Exception e2)
{
System.err.println("caught execption "+e2.getMessage());
try{ din.close(); fin.close();}
catch(Exception ce2){}
header = null;
entries = null;
return;
}
}
try
{
dout.writeBytes("
"+"Come back to my homepage\n");
dout.writeBytes("");
dout.flush();
}
catch(Exception ce3){}
try{ din.close(); fin.close();}
catch(Exception ce31){}
try{ dout.close(); fout.close();}
catch(Exception ce32){}
}
public String fromhtml(String line)
{
int index = line.indexOf(" | ");
if(index<0) return "";
line = line.substring(index+4);
index = line.indexOf(" | ");
if(index<0) return "";
name = line.substring(0,index).trim();
line = line.substring(index+4);
index = line.indexOf(" | ");
if(index<0) return "";
e_mail = line.substring(0,index).trim();
line = line.substring(index+4);
index = line.indexOf(" | ");
if(index<0) return "";
entry = line.substring(0,index).trim();
date = line.substring(index+4).trim();
String rc = " | | "+name+" | "+e_mail+" | "+entry+" | "+date+"\n";
return rc;
}
}
|