import java.io.*;import java.net.*;/** * This program is a very simple Web server.  When it receives a HTTP request, * it just sends the request back to the client. This default port this * server listens to is 1500. *  * Usage: * * 	java HttpRequestMirror <port> *  **/public class HttpRequestMirror {  public static void main(String args[]) throws IOException {      // Get the port to listen on	int port = 1500;	if (args.length == 1)		port = Integer.parseInt(args[0]);    try {      // Create a ServerSocket       ServerSocket ss = new ServerSocket(port);      System.out.println("Server bound at port " + ss.getLocalPort());      while (true) {        Socket client = ss.accept();        // Get input and output streams to talk to the client from the socket        BufferedReader in =           new BufferedReader(new InputStreamReader(client.getInputStream()));        PrintWriter out =          new PrintWriter(new OutputStreamWriter(client.getOutputStream()));        // Start sending our reply, using the HTTP 1.1 protocol        out.println("HTTP/1.1 200 ");                     out.println("Content-Type: text/plain");           out.println();                         // send the empty line            out.flush();        // Now, read the HTTP request from the client, and echo it back to the client.        // When we read an empty line, we stop reading and close the connection.          String line;        while((line = in.readLine()) != null) {          if (line.length() == 0) break;          out.println(line);        }        // close the connection and resume waiting for additional connections        out.close();        in.close();        client.close();      }     }    catch (Exception e) {      System.err.println(e);      System.err.println("Usage: java HttpRequestMirror <port>");    }  }}