~azzar1/unity/add-show-desktop-key

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#!/usr/bin/python

# usage:
#   python-console <port> <magic>

import sys
import web
import md5
import codeop
import cjson
import cgi
import cStringIO
import signal
import Queue
from threading import Thread

class StdinFromWeb(object):
    def __init__(self, cmdQ, lineQ):
        self.cmdQ = cmdQ
        self.lineQ = lineQ

    def readline(self):
        # stop the clock!
        signal.alarm(0)
        self.cmdQ.put({"input":None})
        l = self.lineQ.get()
        # restart the clock:
        # Some of our 5 seconds may have elapsed, but
        # never mind.
        signal.alarm(5)
        return l

class PythonRunner(Thread):
    def __init__(self, cmdQ, lineQ):
        self.cmdQ = cmdQ
        self.lineQ = lineQ
        Thread.__init__(self)

    def run(self):
        self.init_state()
        compiler = codeop.CommandCompiler()

        while True:
            l = self.lineQ.get()
            if self.curr_cmd == '':
                self.curr_cmd = l
            else:
                self.curr_cmd = self.curr_cmd + '\n' + l
            try:
                cmd = compiler(self.curr_cmd)
                if cmd is None:
                    # The command was incomplete,
                    # so send back a None, so the
                    # client can print a '...'
                    self.cmdQ.put({"more":None})
                else:
                    # The command was complete,
                    # so evaluate it!
                    sys.stdin = StdinFromWeb(self.cmdQ, self.lineQ)
                    out = cStringIO.StringIO()
                    sys.stdout = out
                    sys.stderr = out
                    signal.alarm(5)
                    res = eval(cmd, globs, locls)
                    signal.alarm(0)
                    self.cmdQ.put({"okay":(out.getvalue(),res)})
                    curr_cmd = ''
            except Exception, exc:
                signal.alarm(0)
                self.cmdQ.put({"exc":str(exc)})
                curr_cmd = ''

    def init_state(self):
        self.globs = {}
        self.globs['__builtins__'] = globals()['__builtins__']
        self.locls = {}
        self.curr_cmd = ''

urls = (
    '/',            'index',
    '/index.html',  'index',
    '/(.*\.js)',    'jscript',
    '/(.*\.css)',   'style',
    '/chat',        'chat')

# The global 'magic' is the secret that the client and server share
# which is used to create and md5 digest to authenticate requests.
# It is assigned a real value at startup.
magic = ''

class index:
    def GET(self):
        inp = web.input()

        # Authenticate
        digest = md5.new('hello' + magic).digest().encode('hex')
        if inp.digest != digest:
            web.ctx.status = '401 Unauthorized'
            return

        # Okay, so the authentication succeeded,
        # so all we need to do is send back the static
        # HTML for the console app.
        web.output(file("index.html", "r").read())

class jscript:
    def GET(self, name):
        web.output(file(name, "r").read())

class style:
    def GET(self, name):
        web.output(file(name, "r").read())

class chat:

    def POST(self):
        inp = web.input()

        # Authenticate
        digest = md5.new(inp.text + magic).digest().encode('hex')
        if inp.digest != digest:
            web.output("401 Unauthorized")
            web.ctx.status = '401 Unauthorized'
            return

        # Okay, so the authentication succeeded,
        # so now we have the trivial matter of actually
        # executing the python....
        lineQ.put(inp.text)
        r = cmdQ.get()
        sys.__stderr__.write(cjson.encode(r) + "\n")
        web.output(cjson.encode(r))

cmdQ = Queue.Queue()
lineQ = Queue.Queue()
interpThread = PythonRunner(cmdQ, lineQ)

if __name__ == "__main__":
    magic = sys.argv[2]
    interpThread.setDaemon(True)
    interpThread.start()
    web.run(urls, globals())