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#!/usr/bin/python
#
# Copyright (c) 2008, Thomas Hurst <tom@hur.st>
#
# Use of this file is unrestricted provided this notice is retained.
# If you use it, it'd be nice if you dropped me a note. Also beer.
from terminatorlib.util import dbg, err
from terminatorlib.version import APP_NAME, APP_VERSION
import socket
import threading
import SocketServer
import code
import sys
import readline
import rlcompleter
import re
def ddbg(msg):
# uncomment this to get lots of spam from debugserver
return
dbg(msg)
class PythonConsoleServer(SocketServer.BaseRequestHandler):
env = None
def setup(self):
dbg('debugserver: connect from %s' % str(self.client_address))
ddbg('debugserver: env=%r' % PythonConsoleServer.env)
self.console = TerminatorConsole(PythonConsoleServer.env)
def handle(self):
ddbg("debugserver: handling")
try:
self.socketio = self.request.makefile()
sys.stdout = self.socketio
sys.stdin = self.socketio
sys.stderr = self.socketio
self.console.run(self)
finally:
sys.stdout = sys.__stdout__
sys.stdin = sys.__stdin__
sys.stderr = sys.__stderr__
self.socketio.close()
ddbg("debugserver: done handling")
def verify_request(self, request, client_address):
return True
def finish(self):
ddbg('debugserver: disconnect from %s' % str(self.client_address))
# rfc1116/rfc1184
LINEMODE = chr(34) # Linemode negotiation
NULL = chr(0)
ECHO = chr(1)
CR = chr(13)
LF = chr(10)
SE = chr(240) # End subnegotiation
NOP = chr(241)
DM = chr(242) # Data Mark
BRK = chr(243) # Break
IP = chr(244) # Interrupt Process
AO = chr(245) # Abort Output
AYT = chr(246) # Are You There
EC = chr(247) # Erase Character
EL = chr(248) # Erase Line
GA = chr(249) # Go Ahead
SB = chr(250) # Subnegotiation follows
WILL = chr(251) # Subnegotiation commands
WONT = chr(252)
DO = chr(253)
DONT = chr(254)
IAC = chr(255) # Interpret As Command
UIAC = '(^|[^' + IAC + '])' + IAC # Unescaped IAC
BareLF = re.compile('([^' + CR + '])' + CR)
DoDont = re.compile(UIAC +'[' + DO + DONT + '](.)')
WillWont = re.compile(UIAC + '[' + WILL + WONT + '](.)')
AreYouThere = re.compile(UIAC + AYT)
IpTelnet = re.compile(UIAC + IP)
OtherTelnet = re.compile(UIAC + '[^' + IAC + ']')
# See http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/205335 for telnet bits
# Python doesn't make this an especially neat conversion :(
class TerminatorConsole(code.InteractiveConsole):
def parse_telnet(self, data):
odata = data
data = re.sub(BareLF, '\\1', data)
data = data.replace(CR + NULL, '')
data = data.replace(NULL, '')
bits = re.findall(DoDont, data)
ddbg("bits = %r" % bits)
if bits:
data = re.sub(DoDont, '\\1', data)
ddbg("telnet: DO/DON'T answer")
# answer DO and DON'T with WON'T
for bit in bits:
self.write(IAC + WONT + bit[1])
bits = re.findall(WillWont, data)
if bits:
data = re.sub(WillWont, '\\1', data)
ddbg("telnet: WILL/WON'T answer")
for bit in bits:
# answer WILLs and WON'T with DON'Ts
self.write(IAC + DONT + bit[1])
bits = re.findall(AreYouThere, data)
if bits:
ddbg("telnet: am I there answer")
data = re.sub(AreYouThere, '\\1', data)
for bit in bits:
self.write("Yes, I'm still here, I think.\n")
(data, interrupts) = re.subn(IpTelnet, '\\1', data)
if interrupts:
ddbg("debugserver: Ctrl-C detected")
raise KeyboardInterrupt
data = re.sub(OtherTelnet, '\\1', data) # and any other Telnet codes
data = data.replace(IAC + IAC, IAC) # and handle escapes
if data != odata:
ddbg("debugserver: Replaced %r with %r" % (odata, data))
return data
def raw_input(self, prompt = None):
ddbg("debugserver: raw_input prompt = %r" % prompt)
if prompt:
self.write(prompt)
buf = ''
compstate = 0
while True:
data = self.server.socketio.read(1)
ddbg('raw_input: char=%r' % data)
if data == LF or data == '\006':
buf = self.parse_telnet(buf + data)
if buf != '':
return buf
elif data == '\004' or data == '': # ^D
raise EOFError
else:
buf += data
def write(self, data):
ddbg("debugserver: write %r" % data)
self.server.socketio.write(data)
self.server.socketio.flush()
def run(self, server):
self.server = server
self.write("Welcome to the %s-%s debug server, have a nice stay\n" % (APP_NAME, APP_VERSION))
self.interact()
try:
self.write("Time to go. Bye!\n")
except:
pass
def spawn(env):
PythonConsoleServer.env = env
tcpserver = SocketServer.TCPServer(('127.0.0.1', 0), PythonConsoleServer)
dbg("debugserver: listening on %s" % str(tcpserver.server_address))
debugserver = threading.Thread(target=tcpserver.serve_forever, name="DebugServer")
debugserver.setDaemon(True)
debugserver.start()
return(debugserver, tcpserver)
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