import java.io.*; import java.net.*; import java.nio.file.Path; import java.nio.file.Paths; import java.util.Scanner; public class PrimitiveWebServer { public static void main(String args[]) throws Exception { int port = Integer.parseInt(args[0]); ServerSocket serverSocket = new ServerSocket(port); System.err.println("PrimitiveWebServer listening at port " + port); while (true) { Socket socket = serverSocket.accept(); Thread networkListenThread = new Thread() { public void run() { try { PrintStream outputStream = new PrintStream( socket.getOutputStream() ); Scanner scanner = new Scanner(socket.getInputStream()); outputStream.println("HTTP/1.1 200 OK"); outputStream.println("content-type: text/html; charset=UTF-8"); outputStream.println(""); outputStream.println(""); outputStream.println( "

Generated by PrimitiveWebServer.java

" ); outputStream.println( "

Your browser sent the following request:

" ); outputStream.println("

");
            while (scanner.hasNextLine()) {
              String line = scanner.nextLine();
              outputStream.println(line);
              if (line.trim() == "") break;
            }
            outputStream.println("

"); outputStream.println(""); socket.close(); } catch (IOException e) { System.err.println(e); } } }; networkListenThread.start(); } } public static String produceErrorPage( int code, String shortMessage, String message ) { return ( "HTTP/1.1 " + code + " " + shortMessage + "\n\n" + "\n\n

Error " + code + ": " + shortMessage + "

\n" + "

" + message + "

\n" + "" ); } }