private void sendBytes(FileInputStream fis) throws Exception {
    // Construct a 1K buffer to hold bytes on their way to the socket.
    byte[] buffer = new byte[1024];
    int bytes = 0;

    while ((bytes = fis.read(buffer)) != -1) {
      sockManager.Escribir(buffer, bytes);
    }
  }
  private void processRequest() throws Exception {
    // Get the request line of the HTTP request message.
    String requestLine = sockManager.Leer();
    System.out.println("RequestLine: " + requestLine);

    // Extract the filename from the request line.
    StringTokenizer tokens = new StringTokenizer(requestLine);
    tokens.nextToken(); // skip over the method, which should be "GET"
    // System.out.println("Next Token: "+tokens.nextToken());
    String fileName = tokens.nextToken();
    fileName = "files/" + fileName;
    // Open the requested file.
    FileInputStream fis = null;
    boolean fileExists = true;
    try {
      fis = new FileInputStream(fileName);
    } catch (FileNotFoundException e) {
      fileExists = false;
      System.out.println("No abre fichero");
    }

    System.out.println("Incoming!!!");
    System.out.println("1.............." + requestLine);

    // Get and display the header lines.
    String headerLine = null;
    while ((headerLine = sockManager.Leer()).length() != 0) {
      System.out.println("2.............." + headerLine);
    }

    // Construct the response message.
    String statusLine = null;
    String contentTypeLine = null;
    String entityBody = null;
    if (fileExists) {
      statusLine = "HTTP/1.0 200 OK";
      contentTypeLine = contentType(fileName);
    } else {
      statusLine = "HTTP/1.0 404 Not Found";
      contentTypeLine = "Content-type: text/html" + "CRLF";
      entityBody =
          "<HTML>" + "<HEAD><TITLE>Not Found</TITLE></HEAD>" + "<BODY>Not Found</BODY></HTML>";
    }

    // Send the status line.
    sockManager.Escribir(statusLine + CRLF);

    // Send the content type line.
    sockManager.Escribir(contentTypeLine + CRLF);

    // Send a blank line to indicate the end of the header lines.
    sockManager.Escribir(CRLF);

    // Send the entity body.
    if (fileExists) {
      sendBytes(fis);
      fis.close();
    } else {
      // INTRODUCIR AQUI
      sockManager.Escribir(entityBody);
    }

    // Close streams and socket.
    sockManager.CerrarStreams();
    sockManager.CerrarSocket();
  }