Add third_party/pexpect

third_party/pexpect/examples/cgishell.cgi

Index: third_party/pexpect/examples/cgishell.cgi
diff --git a/third_party/pexpect/examples/cgishell.cgi b/third_party/pexpect/examples/cgishell.cgi
new file mode 100644
index 0000000000000000000000000000000000000000..23bef5f54f7eb4745ccca1ef5fc689a55eef4082
--- /dev/null
+++ b/third_party/pexpect/examples/cgishell.cgi
@@ -0,0 +1,766 @@
+#!/usr/bin/python
+##!/usr/bin/env python
+"""CGI shell server
+
+This exposes a shell terminal on a web page.
+It uses AJAX to send keys and receive screen updates.
+The client web browser needs nothing but CSS and Javascript.
+
+    --hostname : sets the remote host name to open an ssh connection to.
+    --username : sets the user name to login with
+    --password : (optional) sets the password to login with
+    --port     : set the local port for the server to listen on
+    --watch    : show the virtual screen after each client request
+
+This project is probably not the most security concious thing I've ever built.
+This should be considered an experimental tool -- at best.
+"""
+
+from __future__ import absolute_import
+from __future__ import print_function
+
+import sys,os
+sys.path.insert (0,os.getcwd()) # let local modules precede any installed modules
+import socket, random, string, traceback, cgi, time, getopt, getpass, threading, resource, signal
+import pxssh, pexpect, ANSI
+
+def exit_with_usage(exit_code=1):
+    print(globals()['__doc__'])
+    os._exit(exit_code)
+
+def client (command, host='localhost', port=-1):
+    """This sends a request to the server and returns the response.
+    If port <= 0 then host is assumed to be the filename of a Unix domain socket.
+    If port > 0 then host is an inet hostname.
+    """
+    if port <= 0:
+        s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+        s.connect(host)
+    else:
+        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        s.connect((host, port))
+    s.send(command)
+    data = s.recv (2500)
+    s.close()
+    return data
+
+def server (hostname, username, password, socket_filename='/tmp/server_sock', daemon_mode = True, verbose=False):
+    """This starts and services requests from a client.
+        If daemon_mode is True then this forks off a separate daemon process and returns the daemon's pid.
+        If daemon_mode is False then this does not return until the server is done.
+    """
+    if daemon_mode:
+        mypid_name = '/tmp/%d.pid' % os.getpid()
+        daemon_pid = daemonize(daemon_pid_filename=mypid_name)
+        time.sleep(1)
+        if daemon_pid != 0:
+            os.unlink(mypid_name)
+            return daemon_pid
+
+    virtual_screen = ANSI.ANSI (24,80) 
+    child = pxssh.pxssh()
+    try:
+        child.login (hostname, username, password, login_naked=True)
+    except:
+        return   
+    if verbose: print('login OK')
+    virtual_screen.write (child.before)
+    virtual_screen.write (child.after)
+
+    if os.path.exists(socket_filename): os.remove(socket_filename)
+    s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+    s.bind(socket_filename)
+    os.chmod(socket_filename, 0o777)
+    if verbose: print('Listen')
+    s.listen(1)
+
+    r = roller (endless_poll, (child, child.PROMPT, virtual_screen))
+    r.start()
+    if verbose: print("started screen-poll-updater in background thread")
+    sys.stdout.flush()
+    try:
+        while True:
+            conn, addr = s.accept()
+            if verbose: print('Connected by', addr)
+            data = conn.recv(1024)
+            request = data.split(' ', 1)
+            if len(request)>1:
+                cmd = request[0].strip()
+                arg = request[1].strip()
+            else:
+                cmd = request[0].strip()
+                arg = ''
+
+            if cmd == 'exit':
+                r.cancel()
+                break
+            elif cmd == 'sendline':
+                child.sendline (arg)
+                time.sleep(0.1)
+                shell_window = str(virtual_screen)
+            elif cmd == 'send' or cmd=='xsend':
+                if cmd=='xsend':
+                    arg = arg.decode("hex")
+                child.send (arg)
+                time.sleep(0.1)
+                shell_window = str(virtual_screen)
+            elif cmd == 'cursor':
+                shell_window = '%x,%x' % (virtual_screen.cur_r, virtual_screen.cur_c)
+            elif cmd == 'refresh':
+                shell_window = str(virtual_screen)
+            elif cmd == 'hash':
+                shell_window = str(hash(str(virtual_screen)))
+
+            response = []
+            response.append (shell_window)
+            if verbose: print('\n'.join(response))
+            sent = conn.send('\n'.join(response))
+            if sent < len (response):
+                if verbose: print("Sent is too short. Some data was cut off.")
+            conn.close()
+    except e:
+        pass
+    r.cancel()
+    if verbose: print("cleaning up socket")
+    s.close()
+    if os.path.exists(socket_filename): os.remove(socket_filename)
+    if verbose: print("server done!")
+
+class roller (threading.Thread):
+    """This class continuously loops a function in a thread.
+        This is basically a thin layer around Thread with a
+        while loop and a cancel.
+    """
+    def __init__(self, function, args=[], kwargs={}):
+        threading.Thread.__init__(self)
+        self.function = function
+        self.args = args
+        self.kwargs = kwargs
+        self.finished = threading.Event()
+    def cancel(self):
+        """Stop the roller."""
+        self.finished.set()
+    def run(self):
+        while not self.finished.isSet():
+            self.function(*self.args, **self.kwargs)
+
+def endless_poll (child, prompt, screen, refresh_timeout=0.1):
+    """This keeps the screen updated with the output of the child.
+        This will be run in a separate thread. See roller class.
+    """
+    #child.logfile_read = screen
+    try:
+        s = child.read_nonblocking(4000, 0.1)
+        screen.write(s)
+    except:
+        pass
+
+def daemonize (stdin=None, stdout=None, stderr=None, daemon_pid_filename=None):
+    """This runs the current process in the background as a daemon.
+    The arguments stdin, stdout, stderr allow you to set the filename that the daemon reads and writes to.
+    If they are set to None then all stdio for the daemon will be directed to /dev/null.
+    If daemon_pid_filename is set then the pid of the daemon will be written to it as plain text
+    and the pid will be returned. If daemon_pid_filename is None then this will return None.
+    """
+    UMASK = 0
+    WORKINGDIR = "/"
+    MAXFD = 1024
+
+    # The stdio file descriptors are redirected to /dev/null by default.
+    if hasattr(os, "devnull"):
+        DEVNULL = os.devnull
+    else:
+        DEVNULL = "/dev/null"
+    if stdin is None: stdin = DEVNULL
+    if stdout is None: stdout = DEVNULL
+    if stderr is None: stderr = DEVNULL
+
+    try:
+        pid = os.fork() # fork first child
+    except OSError as e:
+        raise Exception("%s [%d]" % (e.strerror, e.errno))
+
+    if pid != 0: 
+        os.waitpid(pid,0)
+        if daemon_pid_filename is not None:
+            daemon_pid = int(file(daemon_pid_filename,'r').read())
+            return daemon_pid
+        else:
+            return None
+
+    # first child
+    os.setsid()
+    signal.signal(signal.SIGHUP, signal.SIG_IGN)
+
+    try:
+        pid = os.fork() # fork second child
+    except OSError as e:
+        raise Exception("%s [%d]" % (e.strerror, e.errno))
+
+    if pid != 0:
+        if daemon_pid_filename is not None:
+            file(daemon_pid_filename,'w').write(str(pid))
+        os._exit(0) # exit parent (the first child) of the second child.
+
+    # second child
+    os.chdir(WORKINGDIR)
+    os.umask(UMASK)
+
+    maxfd = resource.getrlimit(resource.RLIMIT_NOFILE)[1]
+    if maxfd == resource.RLIM_INFINITY:
+        maxfd = MAXFD
+  
+    # close all file descriptors
+    for fd in range(0, maxfd):
+        try:
+            os.close(fd)
+        except OSError:   # fd wasn't open to begin with (ignored)
+            pass
+
+    os.open (DEVNULL, os.O_RDWR)  # standard input
+
+    # redirect standard file descriptors
+    si = open(stdin, 'r')
+    so = open(stdout, 'a+')
+    se = open(stderr, 'a+', 0)
+    os.dup2(si.fileno(), sys.stdin.fileno())
+    os.dup2(so.fileno(), sys.stdout.fileno())
+    os.dup2(se.fileno(), sys.stderr.fileno())
+
+    return 0
+
+def client_cgi ():
+    """This handles the request if this script was called as a cgi.
+    """
+    sys.stderr = sys.stdout
+    ajax_mode = False
+    TITLE="Shell"
+    SHELL_OUTPUT=""
+    SID="NOT"
+    print("Content-type: text/html;charset=utf-8\r\n")
+    try:
+        form = cgi.FieldStorage()
+        if 'ajax' in form:
+            ajax_mode = True
+            ajax_cmd = form['ajax'].value
+            SID=form['sid'].value
+            if ajax_cmd == 'send':
+                command = 'xsend'
+                arg = form['arg'].value.encode('hex')
+                result = client (command + ' ' + arg, '/tmp/'+SID)
+                print(result)
+            elif ajax_cmd == 'refresh':
+                command = 'refresh'
+                result = client (command, '/tmp/'+SID)
+                print(result)
+            elif ajax_cmd == 'cursor':
+                command = 'cursor'
+                result = client (command, '/tmp/'+SID)
+                print(result)
+            elif ajax_cmd == 'exit':
+                command = 'exit'
+                result = client (command, '/tmp/'+SID)
+                print(result)
+            elif ajax_cmd == 'hash':
+                command = 'hash'
+                result = client (command, '/tmp/'+SID)
+                print(result)
+        elif 'sid' not in form:
+            SID=random_sid()
+            print(LOGIN_HTML % locals());
+        else:
+            SID=form['sid'].value
+            if 'start_server' in form:
+                USERNAME = form['username'].value
+                PASSWORD = form['password'].value
+                dpid = server ('127.0.0.1', USERNAME, PASSWORD, '/tmp/'+SID)
+                SHELL_OUTPUT="daemon pid: " + str(dpid)
+            else:
+                if 'cli' in form:
+                    command = 'sendline ' + form['cli'].value
+                else:
+                    command = 'sendline'
+                SHELL_OUTPUT = client (command, '/tmp/'+SID)
+            print(CGISH_HTML % locals())
+    except:
+        tb_dump = traceback.format_exc()
+        if ajax_mode:
+            print(str(tb_dump))
+        else:
+            SHELL_OUTPUT=str(tb_dump)
+            print(CGISH_HTML % locals())
+
+def server_cli():
+    """This is the command line interface to starting the server.
+    This handles things if the script was not called as a CGI
+    (if you run it from the command line).
+    """
+    try:
+        optlist, args = getopt.getopt(sys.argv[1:], 'h?d', ['help','h','?', 'hostname=', 'username=', 'password=', 'port=', 'watch'])
+    except Exception as e:
+        print(str(e))
+        exit_with_usage()
+
+    command_line_options = dict(optlist)
+    options = dict(optlist)
+    # There are a million ways to cry for help. These are but a few of them.
+    if [elem for elem in command_line_options if elem in ['-h','--h','-?','--?','--help']]:
+        exit_with_usage(0)
+  
+    hostname = "127.0.0.1"
+    #port = 1664
+    username = os.getenv('USER')
+    password = ""
+    daemon_mode = False
+    if '-d' in options:
+        daemon_mode = True
+    if '--watch' in options:
+        watch_mode = True
+    else:
+        watch_mode = False
+    if '--hostname' in options:
+        hostname = options['--hostname']
+    if '--port' in options:
+        port = int(options['--port'])
+    if '--username' in options:
+        username = options['--username']
+    if '--password' in options:
+        password = options['--password']
+    else:
+        password = getpass.getpass('password: ')
+   
+    server (hostname, username, password, '/tmp/mysock', daemon_mode)
+
+def random_sid ():
+    a=random.randint(0,65535)
+    b=random.randint(0,65535)
+    return '%04x%04x.sid' % (a,b)
+
+def parse_host_connect_string (hcs):
+    """This parses a host connection string in the form
+    username:password@hostname:port. All fields are options expcet hostname. A
+    dictionary is returned with all four keys. Keys that were not included are
+    set to empty strings ''. Note that if your password has the '@' character
+    then you must backslash escape it.
+    """
+    if '@' in hcs:
+        p = re.compile (r'(?P<username>[^@:]*)(:?)(?P<password>.*)(?!\\)@(?P<hostname>[^:]*):?(?P<port>[0-9]*)')
+    else:
+        p = re.compile (r'(?P<username>)(?P<password>)(?P<hostname>[^:]*):?(?P<port>[0-9]*)')
+    m = p.search (hcs)
+    d = m.groupdict()
+    d['password'] = d['password'].replace('\\@','@')
+    return d
+     
+def pretty_box (s, rows=24, cols=80):
+    """This puts an ASCII text box around the given string.
+    """
+    top_bot = '+' + '-'*cols + '+\n'
+    return top_bot + '\n'.join(['|'+line+'|' for line in s.split('\n')]) + '\n' + top_bot
+
+def main ():
+    if os.getenv('REQUEST_METHOD') is None:
+        server_cli()
+    else:
+        client_cgi()
+
+# It's mostly HTML and Javascript from here on out.
+CGISH_HTML="""<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+<head>
+<title>%(TITLE)s %(SID)s</title>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<style type=text/css>
+a {color: #9f9; text-decoration: none}
+a:hover {color: #0f0}
+hr {color: #0f0}
+html,body,textarea,input,form
+{
+font-family: "Courier New", Courier, mono; 
+font-size: 8pt; 
+color: #0c0;
+background-color: #020;
+margin:0;
+padding:0;
+border:0;
+}
+input { background-color: #010; }
+textarea {
+border-width:1;
+border-style:solid;
+border-color:#0c0;
+padding:3;
+margin:3;
+}
+</style>
+
+<script language="JavaScript">
+function focus_first()
+{if (document.forms.length > 0)
+{var TForm = document.forms[0];
+for (i=0;i<TForm.length;i++){
+if ((TForm.elements[i].type=="text")||
+(TForm.elements[i].type=="textarea")||
+(TForm.elements[i].type.toString().charAt(0)=="s"))
+{document.forms[0].elements[i].focus();break;}}}}
+
+// JavaScript Virtual Keyboard
+// If you like this code then buy me a sandwich.
+// Noah Spurrier <noah@noah.org>
+var flag_shift=0;
+var flag_shiftlock=0;
+var flag_ctrl=0;
+var ButtonOnColor="#ee0";
+
+function init ()
+{
+    // hack to set quote key to show both single quote and double quote
+    document.form['quote'].value = "'" + '  "';
+    //refresh_screen();
+    poll();
+    document.form["cli"].focus();
+}
+function get_password ()
+{
+    var username = prompt("username?","");
+    var password = prompt("password?","");
+    start_server (username, password);
+}
+function multibrowser_ajax ()
+{
+    var xmlHttp = false;
+/*@cc_on @*/
+/*@if (@_jscript_version >= 5)
+    try
+    {
+        xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
+    }
+    catch (e)
+    {
+        try
+        {
+            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
+        }
+        catch (e2)
+        {
+              xmlHttp = false;
+        }
+    }
+@end @*/
+
+    if (!xmlHttp && typeof XMLHttpRequest != 'undefined')
+    {
+        xmlHttp = new XMLHttpRequest();
+    }
+    return xmlHttp;
+}
+function load_url_to_screen(url)
+{ 
+    xmlhttp = multibrowser_ajax();
+    //window.XMLHttpRequest?new XMLHttpRequest(): new ActiveXObject("Microsoft.XMLHTTP");
+    xmlhttp.onreadystatechange = update_virtual_screen;
+    xmlhttp.open("GET", url);
+    xmlhttp.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
+    xmlhttp.send(null);
+}
+function update_virtual_screen()
+{
+    if ((xmlhttp.readyState == 4) && (xmlhttp.status == 200))
+    {
+        var screen_text = xmlhttp.responseText;
+        document.form["screen_text"].value = screen_text;
+        //var json_data = json_parse(xmlhttp.responseText);
+    }
+}
+function poll()
+{
+    refresh_screen();
+    timerID  = setTimeout("poll()", 2000);
+    // clearTimeout(timerID);
+}
+//function start_server (username, password)
+//{
+//    load_url_to_screen('cgishell.cgi?ajax=serverstart&username=' + escape(username) + '&password=' + escape(password);
+//}
+function refresh_screen()
+{
+    load_url_to_screen('cgishell.cgi?ajax=refresh&sid=%(SID)s');
+}
+function query_hash()
+{
+    load_url_to_screen('cgishell.cgi?ajax=hash&sid=%(SID)s');
+}
+function query_cursor()
+{
+    load_url_to_screen('cgishell.cgi?ajax=cursor&sid=%(SID)s');
+}
+function exit_server()
+{
+    load_url_to_screen('cgishell.cgi?ajax=exit&sid=%(SID)s');
+}
+function type_key (chars)
+{
+    var ch = '?';
+    if (flag_shiftlock || flag_shift)
+    {
+        ch = chars.substr(1,1);
+    }
+    else if (flag_ctrl)
+    {
+        ch = chars.substr(2,1);
+    }
+    else
+    {
+        ch = chars.substr(0,1);
+    }
+    load_url_to_screen('cgishell.cgi?ajax=send&sid=%(SID)s&arg=' + escape(ch));
+    if (flag_shift || flag_ctrl)
+    {
+        flag_shift = 0;
+        flag_ctrl = 0;
+    }
+    update_button_colors();
+}
+
+function key_shiftlock()
+{
+    flag_ctrl = 0;
+    flag_shift = 0;
+    if (flag_shiftlock)
+    {
+        flag_shiftlock = 0;
+    }
+    else
+    {
+        flag_shiftlock = 1;
+    }
+    update_button_colors();
+}
+
+function key_shift()
+{
+    if (flag_shift)
+    {
+        flag_shift = 0;
+    }
+    else
+    {
+        flag_ctrl = 0;
+        flag_shiftlock = 0;
+        flag_shift = 1;
+    }
+    update_button_colors(); 
+}
+function key_ctrl ()
+{
+    if (flag_ctrl)
+    {
+        flag_ctrl = 0;
+    }
+    else
+    {
+        flag_ctrl = 1;
+        flag_shiftlock = 0;
+        flag_shift = 0;
+    }
+    
+    update_button_colors();
+}
+function update_button_colors ()
+{
+    if (flag_ctrl)
+    {
+        document.form['Ctrl'].style.backgroundColor = ButtonOnColor;
+        document.form['Ctrl2'].style.backgroundColor = ButtonOnColor;
+    }
+    else
+    {
+        document.form['Ctrl'].style.backgroundColor = document.form.style.backgroundColor;
+        document.form['Ctrl2'].style.backgroundColor = document.form.style.backgroundColor;
+    }
+    if (flag_shift)
+    {
+        document.form['Shift'].style.backgroundColor = ButtonOnColor;
+        document.form['Shift2'].style.backgroundColor = ButtonOnColor;
+    }
+    else
+    {
+        document.form['Shift'].style.backgroundColor = document.form.style.backgroundColor;
+        document.form['Shift2'].style.backgroundColor = document.form.style.backgroundColor;
+    }
+    if (flag_shiftlock)
+    {
+        document.form['ShiftLock'].style.backgroundColor = ButtonOnColor;
+    }
+    else
+    {
+        document.form['ShiftLock'].style.backgroundColor = document.form.style.backgroundColor;
+    }
+    
+}
+function keyHandler(e)
+{
+    var pressedKey;
+    if (document.all)    { e = window.event; }
+    if (document.layers) { pressedKey = e.which; }
+    if (document.all)    { pressedKey = e.keyCode; }
+    pressedCharacter = String.fromCharCode(pressedKey);
+    type_key(pressedCharacter+pressedCharacter+pressedCharacter);
+    alert(pressedCharacter);
+//    alert(' Character = ' + pressedCharacter + ' [Decimal value = ' + pressedKey + ']');
+}
+//document.onkeypress = keyHandler;
+//if (document.layers)
+//    document.captureEvents(Event.KEYPRESS);
+//http://sniptools.com/jskeys
+//document.onkeyup = KeyCheck;       
+function KeyCheck(e)
+{
+    var KeyID = (window.event) ? event.keyCode : e.keyCode;
+    type_key(String.fromCharCode(KeyID));
+    e.cancelBubble = true;
+    window.event.cancelBubble = true;
+}
+</script>
+
+</head>
+
+<body onload="init()">
+<form id="form" name="form" action="/cgi-bin/cgishell.cgi" method="POST">
+<input name="sid" value="%(SID)s" type="hidden">
+<textarea name="screen_text" cols="81" rows="25">%(SHELL_OUTPUT)s</textarea>
+<hr noshade="1">
+&nbsp;<input name="cli" id="cli" type="text" size="80"><br>
+<table border="0" align="left">
+<tr>
+<td width="86%%" align="center">    
+    <input name="submit" type="submit" value="Submit">
+    <input name="refresh" type="button" value="REFRESH" onclick="refresh_screen()">
+    <input name="refresh" type="button" value="CURSOR" onclick="query_cursor()">
+    <input name="hash" type="button" value="HASH" onclick="query_hash()">
+    <input name="exit" type="button" value="EXIT" onclick="exit_server()">
+    <br>
+    <input type="button" value="Esc" onclick="type_key('\\x1b\\x1b')" />
+    <input type="button" value="` ~" onclick="type_key('`~')" />
+    <input type="button" value="1!" onclick="type_key('1!')" />
+    <input type="button" value="2@" onclick="type_key('2@\\x00')" />
+    <input type="button" value="3#" onclick="type_key('3#')" />
+    <input type="button" value="4$" onclick="type_key('4$')" />
+    <input type="button" value="5%%" onclick="type_key('5%%')" />
+    <input type="button" value="6^" onclick="type_key('6^\\x1E')" />
+    <input type="button" value="7&" onclick="type_key('7&')" />
+    <input type="button" value="8*" onclick="type_key('8*')" />
+    <input type="button" value="9(" onclick="type_key('9(')" />
+    <input type="button" value="0)" onclick="type_key('0)')" />
+    <input type="button" value="-_" onclick="type_key('-_\\x1F')" />
+    <input type="button" value="=+" onclick="type_key('=+')" />
+    <input type="button" value="BkSp" onclick="type_key('\\x08\\x08\\x08')" />
+    <br>
+    <input type="button" value="Tab" onclick="type_key('\\t\\t')" />
+    <input type="button" value="Q" onclick="type_key('qQ\\x11')" />
+    <input type="button" value="W" onclick="type_key('wW\\x17')" />
+    <input type="button" value="E" onclick="type_key('eE\\x05')" />
+    <input type="button" value="R" onclick="type_key('rR\\x12')" />
+    <input type="button" value="T" onclick="type_key('tT\\x14')" />
+    <input type="button" value="Y" onclick="type_key('yY\\x19')" />
+    <input type="button" value="U" onclick="type_key('uU\\x15')" />
+    <input type="button" value="I" onclick="type_key('iI\\x09')" />
+    <input type="button" value="O" onclick="type_key('oO\\x0F')" />
+    <input type="button" value="P" onclick="type_key('pP\\x10')" />
+    <input type="button" value="[ {" onclick="type_key('[{\\x1b')" />
+    <input type="button" value="] }" onclick="type_key(']}\\x1d')" />
+    <input type="button" value="\\ |" onclick="type_key('\\\\|\\x1c')" />
+    <br>
+    <input type="button" id="Ctrl" value="Ctrl" onclick="key_ctrl()" />
+    <input type="button" value="A" onclick="type_key('aA\\x01')" />
+    <input type="button" value="S" onclick="type_key('sS\\x13')" />
+    <input type="button" value="D" onclick="type_key('dD\\x04')" />
+    <input type="button" value="F" onclick="type_key('fF\\x06')" />
+    <input type="button" value="G" onclick="type_key('gG\\x07')" />
+    <input type="button" value="H" onclick="type_key('hH\\x08')" />
+    <input type="button" value="J" onclick="type_key('jJ\\x0A')" />
+    <input type="button" value="K" onclick="type_key('kK\\x0B')" />
+    <input type="button" value="L" onclick="type_key('lL\\x0C')" />
+    <input type="button" value="; :" onclick="type_key(';:')" />
+    <input type="button" id="quote" value="'" onclick="type_key('\\x27\\x22')" />
+    <input type="button" value="Enter" onclick="type_key('\\n\\n')" />
+    <br>
+    <input type="button" id="ShiftLock" value="Caps Lock" onclick="key_shiftlock()" />
+    <input type="button" id="Shift" value="Shift" onclick="key_shift()"  />
+    <input type="button" value="Z" onclick="type_key('zZ\\x1A')" />
+    <input type="button" value="X" onclick="type_key('xX\\x18')" />
+    <input type="button" value="C" onclick="type_key('cC\\x03')" />
+    <input type="button" value="V" onclick="type_key('vV\\x16')" />
+    <input type="button" value="B" onclick="type_key('bB\\x02')" />
+    <input type="button" value="N" onclick="type_key('nN\\x0E')" />
+    <input type="button" value="M" onclick="type_key('mM\\x0D')" />
+    <input type="button" value=", <" onclick="type_key(',<')" />
+    <input type="button" value=". >" onclick="type_key('.>')" />
+    <input type="button" value="/ ?" onclick="type_key('/?')" />
+    <input type="button" id="Shift2" value="Shift" onclick="key_shift()" />
+    <input type="button" id="Ctrl2" value="Ctrl" onclick="key_ctrl()" />
+    <br>
+    <input type="button" value="        FINAL FRONTIER        " onclick="type_key('  ')" />
+</td>
+</tr>
+</table>  
+</form>
+</body>
+</html>
+"""
+
+LOGIN_HTML="""<html>
+<head>
+<title>Shell Login</title>
+<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+<style type=text/css>
+a {color: #9f9; text-decoration: none}
+a:hover {color: #0f0}
+hr {color: #0f0}
+html,body,textarea,input,form
+{
+font-family: "Courier New", Courier, mono;
+font-size: 8pt;
+color: #0c0;
+background-color: #020;
+margin:3;
+padding:0;
+border:0;
+}
+input { background-color: #010; }
+input,textarea {
+border-width:1;
+border-style:solid;
+border-color:#0c0;
+padding:3;
+margin:3;
+}
+</style>
+<script language="JavaScript">
+function init ()
+{
+    document.login_form["username"].focus();
+}
+</script>
+</head>
+<body onload="init()">
+<form name="login_form" method="POST">
+<input name="start_server" value="1" type="hidden">
+<input name="sid" value="%(SID)s" type="hidden">
+username: <input name="username" type="text" size="30"><br>
+password: <input name="password" type="password" size="30"><br>
+<input name="submit" type="submit" value="enter">
+</form>
+<br>
+</body>
+</html>
+"""
+
+if __name__ == "__main__":
+    try:
+        main()
+    except Exception as e:
+        print(str(e))
+        tb_dump = traceback.format_exc()
+        print(str(tb_dump))
+