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Viewing changes to console/python-console

  • Committer: mattgiuca
  • Date: 2008-01-11 05:11:08 UTC
  • Revision ID: svn-v3-trunk0:2b9c9e99-6f39-0410-b283-7f802c844ae2:trunk:180
util: Added function nice_filesize.

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console/python-console
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import cgi
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import cStringIO
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import signal
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import Queue
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from threading import Thread
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class StdinFromWeb(object):
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    def __init__(self, cmdQ, lineQ):
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        self.cmdQ = cmdQ
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        self.lineQ = lineQ
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    def readline(self):
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        # stop the clock!
 
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globs = {}
 
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globs['__builtins__'] = globals()['__builtins__']
 
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locls = {}
 
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compiler = codeop.CommandCompiler()
 
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curr_cmd = ''
 
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def do_chat(txt):
 
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    global curr_cmd
 
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    if curr_cmd == '':
 
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        curr_cmd = txt
 
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    else:
 
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        curr_cmd = curr_cmd + '\n' + txt
 
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    try:
 
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        cmd = compiler(curr_cmd)
 
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        if cmd is None:
 
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            # The command was incomplete,
 
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            # so send back a None, so the
 
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            # client can print a '...'
 
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            web.output(cjson.encode(None))
 
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        else:
 
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            # The command was complete,
 
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            # so evaluate it!
 
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            out = cStringIO.StringIO()
 
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            sys.stdout = out
 
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            sys.stderr = out
 
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            signal.alarm(5)
 
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            res = eval(cmd, globs, locls)
 
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            signal.alarm(0)
 
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            v = (out.getvalue(), res, None)
 
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            web.output(cjson.encode(v))
 
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            curr_cmd = ''
 
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    except Exception, exc:
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        signal.alarm(0)
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        self.cmdQ.put({"input":None})
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        l = self.lineQ.get()
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        # restart the clock:
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        # Some of our 5 seconds may have elapsed, but
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        # never mind.
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        signal.alarm(5)
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        return l
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class PythonRunner(Thread):
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    def __init__(self, cmdQ, lineQ):
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        self.cmdQ = cmdQ
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        self.lineQ = lineQ
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        Thread.__init__(self)
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    def run(self):
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        self.init_state()
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        compiler = codeop.CommandCompiler()
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        while True:
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            l = self.lineQ.get()
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            if self.curr_cmd == '':
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                self.curr_cmd = l
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            else:
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                self.curr_cmd = self.curr_cmd + '\n' + l
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            try:
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                cmd = compiler(self.curr_cmd)
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                if cmd is None:
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                    # The command was incomplete,
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                    # so send back a None, so the
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                    # client can print a '...'
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                    self.cmdQ.put({"more":None})
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                else:
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                    # The command was complete,
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                    # so evaluate it!
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                    sys.stdin = StdinFromWeb(self.cmdQ, self.lineQ)
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                    out = cStringIO.StringIO()
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                    sys.stdout = out
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                    sys.stderr = out
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                    signal.alarm(5)
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                    res = eval(cmd, globs, locls)
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                    signal.alarm(0)
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                    self.cmdQ.put({"okay":(out.getvalue(),res)})
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                    curr_cmd = ''
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            except Exception, exc:
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                signal.alarm(0)
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                self.cmdQ.put({"exc":str(exc)})
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                curr_cmd = ''
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    def init_state(self):
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        self.globs = {}
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        self.globs['__builtins__'] = globals()['__builtins__']
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        self.locls = {}
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        self.curr_cmd = ''
 
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        v = (None, None, str(exc))
 
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        web.output(cjson.encode(v))
 
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        curr_cmd = ''
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urls = (
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    '/',            'index',
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        web.output(file(name, "r").read())
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class chat:
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    def POST(self):
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        inp = web.input()
 
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        sys.stderr.write(str(inp) + "\n")
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        # Authenticate
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        digest = md5.new(inp.text + magic).digest().encode('hex')
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        if inp.digest != digest:
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            web.output("401 Unauthorized")
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            web.ctx.status = '401 Unauthorized'
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            return
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        # Okay, so the authentication succeeded,
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        # so now we have the trivial matter of actually
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        # executing the python....
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        lineQ.put(inp.text)
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        r = cmdQ.get()
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        sys.__stderr__.write(cjson.encode(r) + "\n")
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        web.output(cjson.encode(r))
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cmdQ = Queue.Queue()
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lineQ = Queue.Queue()
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interpThread = PythonRunner(cmdQ, lineQ)
 
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        do_chat(inp.text)
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if __name__ == "__main__":
 
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    # FIXME jail!
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    magic = sys.argv[2]
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    interpThread.setDaemon(True)
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    interpThread.start()
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    web.run(urls, globals())