I am trying to send a text file from the sender to the receiver however on the sender side I get connection refused: connect. I use a localhost address on the receiver side and I manually enter it in when prompt on the sender side. The error occurs at sendChannel.connect(address) in the sender class.
Sender class:
public static void startProcess(){
SocketChannel sendChannel = null;
RandomAccessFile f = null;
Scanner scan = new Scanner(System.in);
SocketAddress address = null;
try{
sendChannel = SocketChannel.open(); // open the channel
//DatagramSocket socket = dChannel.socket();
boolean validAddr = false;
while(validAddr != true){
try{
System.out.println("Enter in valid server IP Address");
address = new InetSocketAddress(scan.nextLine(),7777);
validAddr = true;
}
catch(Exception e){
System.out.println("Invalid!");
System.out.println(e.getMessage());
}
}
//System.out.println("Address: " + InetAddress.getLocalHost().getHostAddress());
sendChannel.connect(address);
File i = new File("./data.txt");
f = new RandomAccessFile(i,"r");
FileChannel fChannel = f.getChannel();
ByteBuffer bBuffer = ByteBuffer.allocate(1024); //set buffer capacity to 1024 bytes
while (fChannel.read(bBuffer) > 0) {
//SocketAddress client = dChannel.receive(bBuffer); //receive the datagram
bBuffer.flip(); //Set limit to current position
sendChannel.write(bBuffer);
//dChannel.send(bBuffer, client); //send the datagram using channel
bBuffer.clear(); //Get ready for new sequence of operations
}
Thread.sleep(1000);
System.out.println("End of file reached");
sendChannel.close();
f.close();
}
catch(Exception e){
System.out.println(e.getMessage());
}
}
Receiver side:
public static void startProcess(){
Scanner scan = new Scanner(System.in);
ServerSocketChannel serverChannel = null;
SocketChannel chan = null;
RandomAccessFile file = null;
try{
serverChannel = ServerSocketChannel.open();
//Read in a valid IP Address
boolean val2 = false;
int tempNum = 0;
for (int portNUM = 7777 ;!val2; portNUM++){
try {
serverChannel.socket().bind(new InetSocketAddress("localhost", portNUM));
tempNum = portNUM;
val2 =true;
} catch (IOException e) {
System.out.println("Error!");
}
}
System.out.println(InetAddress.getLocalHost().getHostAddress());
System.out.println("Port Number: " + tempNum);
chan = serverChannel.accept();
System.out.println("Connected!");
chan.getRemoteAddress();
file = new RandomAccessFile("./output.txt","rw");
ByteBuffer buff = ByteBuffer.allocate(1024);
FileChannel receiveChannel = file.getChannel();
while(chan.read(buff) > 0){
buff.flip();
receiveChannel.write(buff);
buff.clear();
}
// buff.put((byte)65 );
//buff.flip();
Thread.sleep(1000);
receiveChannel.close();
System.out.println("End of file");
chan.close();
}
catch(Exception e){
System.out.println(e.getMessage());
}
}
