MySocket.java
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package pad.prac2;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
public class MySocket extends Socket
{
private PrintWriter output;
private BufferedReader input;
public MySocket()
{
super();
}
public void connect(String host, int port)
{
SocketAddress addr = new InetSocketAddress(host,port);
try
{
super.connect(addr);
initializeStreams();
}
catch(IOException ioExc)
{
System.out.println("TCP: Error occured while connecting to remote host");
}
}
public void initializeStreams()
{
try
{
output = new PrintWriter(super.getOutputStream());
input = new BufferedReader(new InputStreamReader(super.getInputStream()));
}
catch(IOException ioExc)
{
System.out.println("TCP: Error initializing socket");
}
}
public void close()
{
try
{
super.shutdownInput();
super.shutdownOutput();
super.close();
}
catch(IOException ioExc)
{
System.out.println("TCP: Error while closing socket");
}
}
public void sendMsg(String msg)
{
String length = new Integer(msg.length()).toString();
this.write(length+'\0', length.length()+1);
this.write(msg,msg.length());
}
public String recvMsg()
{
String len,str;
int length;
len = this.readLine();
if(len == null)
{
return len;
}
length = Integer.parseInt(len);
str = this.read(length);
return str;
}
public void write(String str, int bytes)
{
output.print(str.substring(0,bytes));
}
public String read(int bytes)
{
char[] buffer = new char[bytes];
try
{
input.read(buffer, 0, bytes);
return new String(buffer);
}
catch(IOException ioExc)
{
System.out.println("TCP: Error retrieving data from remote endpoint");
return null;
}
}
public String readLine()
{
try
{
String line = "";
char[] c = new char[1];
while(true)
{
input.read(c,0,1);
if(c[0] == '\0')
{
break;
}
line += c[0];
}
return line;
}
catch(IOException ioExc)
{
System.out.println("TCP: Error retrieving data from remote endpoint");
return null;
}
}
}