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Viewing changes to console/python-console

  • Committer: drtomc
  • Date: 2008-01-30 22:53:00 UTC
  • Revision ID: svn-v3-trunk0:2b9c9e99-6f39-0410-b283-7f802c844ae2:trunk:340
Mostly fix the block-of-text to the console problem. The tutorial system should call "block" rather than "chat" to send the block of text.

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console/python-console
 
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#!/usr/bin/python
 
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# usage:
 
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#   python-console <port> <magic>
 
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import sys
 
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import web
 
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import md5
 
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import codeop
 
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import cjson
 
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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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        signal.alarm(0)
 
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        self.cmdQ.put({"input":None})
 
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        ln = self.lineQ.get()
 
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        if 'chat' in ln:
 
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            # restart the clock:
 
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            # Some of our 5 seconds may have elapsed, but never mind.
 
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            signal.alarm(5)
 
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            return ln['chat']
 
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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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            ln = self.lineQ.get()
 
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            if 'chat' in ln:
 
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                mode = 
 
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                if self.curr_cmd == '':
 
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                    self.curr_cmd = ln['chat']
 
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                else:
 
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                    self.curr_cmd = self.curr_cmd + '\n' + ln['chat']
 
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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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                        self.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":(self.out.getvalue(),res)})
 
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                        self.curr_cmd = ''
 
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                except Exception, exc:
 
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                    signal.alarm(0)
 
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                    self.cmdQ.put({"exc":(self.out.getvalue(),str(exc))})
 
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                    self.curr_cmd = ''
 
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            if 'block' in ln:
 
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                # throw away a partial command.
 
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                self.curr_cmd = ''
 
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                try:
 
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                    cmd = compile(ln['block'], "<web session>", 'exec');
 
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                    sys.stdin = StdinFromWeb(self.cmdQ, self.lineQ)
 
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                    self.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":(self.out.getvalue(),res)})
 
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                    self.curr_cmd = ''
 
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                except Exception, exc:
 
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                    signal.alarm(0)
 
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                    self.cmdQ.put({"exc":(self.out.getvalue(),str(exc))})
 
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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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urls = (
 
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    '/',            'index',
 
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    '/index.html',  'index',
 
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    '/(.*\.js)',    'jscript',
 
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    '/(.*\.css)',   'style',
 
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    '/chat',        'chat',
 
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    '/block',       'block')
 
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# The global 'magic' is the secret that the client and server share
 
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# which is used to create and md5 digest to authenticate requests.
 
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# It is assigned a real value at startup.
 
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magic = ''
 
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class index:
 
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    def GET(self):
 
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        inp = web.input()
 
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        # Authenticate
 
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        digest = md5.new('hello' + magic).digest().encode('hex')
 
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        if inp.digest != digest:
 
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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 all we need to do is send back the static
 
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        # HTML for the console app.
 
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        web.output(file("index.html", "r").read())
 
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class jscript:
 
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    def GET(self, name):
 
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        web.output(file(name, "r").read())
 
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class style:
 
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    def GET(self, name):
 
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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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        # 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({'chat':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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class block:
 
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    def POST(self):
 
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        inp = web.input()
 
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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,
 
168
        # so now we have the trivial matter of actually
 
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        # executing the python....
 
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        lineQ.put({'block':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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if __name__ == "__main__":
 
180
    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())