How could I incorporate elements to send data to the server, and send the response back to the client?
Try the following example as basic proxy:
public class Proxy {
public static void main(String[] args) throws IOException {
ServerSocket serverSocket = new ServerSocket(1230); // proxy port
Socket socket = serverSocket.accept();
Socket relay = new Socket("localhost", 1234); // server address
new ProxyThread(relay.getInputStream(), socket.getOutputStream()).start();
new ProxyThread(socket.getInputStream(), relay.getOutputStream()).start();
}
}
class ProxyThread extends Thread {
private InputStream inputStream;
private OutputStream outputStream;
ProxyThread(InputStream inputStream, OutputStream outputStream) {
this.inputStream = inputStream;
this.outputStream = outputStream;
}
public void run() {
try {
int i;
while ((i = inputStream.read()) != -1) {
outputStream.write(i);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
It lacks proper exception handling, only demonstrating the basic idea.