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  • Committer: William Grant
  • Date: 2009-02-23 23:47:02 UTC
  • mfrom: (1099.1.211 new-dispatch)
  • Revision ID: grantw@unimelb.edu.au-20090223234702-db4b1llly46ignwo
Merge from lp:~ivle-dev/ivle/new-dispatch.

Pretty much everything changes. Reread the setup docs. Backup your databases.
Every file is now in a different installed location, the configuration system
is rewritten, the dispatch system is rewritten, URLs are different, the
database is different, worksheets and exercises are no longer on the
filesystem, we use a templating engine, jail service protocols are rewritten,
we don't repeat ourselves, we have authorization rewritten, phpBB is gone,
and probably lots of other things that I cannot remember.

This is certainly the biggest commit I have ever made, and hopefully
the largest I ever will.

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ivle/console.py
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import errno
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import cPickle
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import hashlib
 
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import md5
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import os
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import random
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import socket
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import cjson
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from ivle import chat
 
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import ivle.conf
 
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from ivle import (chat, util)
 
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# Outside Jail
 
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trampoline_path = os.path.join(ivle.conf.lib_path, "trampoline")
 
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# Inside Jail
 
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python_path = "/usr/bin/python"
 
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console_dir = os.path.join(ivle.conf.share_path, 'services')
 
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console_path = os.path.join(console_dir, 'python-console')
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class ConsoleError(Exception):
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    """ The console failed in some way. This is bad. """
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class Console(object):
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    """ Provides a nice python interface to the console
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    """
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    def __init__(self, config, uid, jail_path, working_dir):
 
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    def __init__(self, uid, jail_path, working_dir):
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        """Starts up a console service for user uid, inside chroot jail 
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        jail_path with work directory of working_dir
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        """
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        super(Console, self).__init__()
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        self.config = config
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        self.uid = uid
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        self.jail_path = jail_path
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        self.working_dir = working_dir
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        # Create magic
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        # TODO
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        self.magic = hashlib.md5(uuid.uuid4().bytes).hexdigest()
 
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        self.magic = md5.new(uuid.uuid4().bytes).digest().encode('hex')
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        # Try to find a free port on the server.
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        # Just try some random ports in the range [3000,8000)
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        while tries < 5:
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            self.port = int(random.uniform(3000, 8000))
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            trampoline_path = os.path.join(self.config['paths']['lib'],
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                                           "trampoline")
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            # Start the console server (port, magic)
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            # trampoline usage: tramp uid jail_dir working_dir script_path args
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            # console usage:    python-console port magic
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            res = os.spawnv(os.P_WAIT, trampoline_path, [
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                trampoline_path,
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                str(self.uid),
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                self.config['paths']['jails']['mounts'],
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                self.config['paths']['jails']['src'],
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                self.config['paths']['jails']['template'],
 
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                ivle.conf.jail_base,
 
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                ivle.conf.jail_src_base,
 
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                ivle.conf.jail_system,
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                self.jail_path,
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                os.path.join(self.config['paths']['share'], 'services'),
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                "/usr/bin/python",
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                os.path.join(self.config['paths']['share'],
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                             'services/python-console'),
 
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                console_dir,
 
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                python_path,
 
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                console_path,
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                str(self.port),
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                str(self.magic),
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                self.working_dir
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        # Unpickle any exceptions
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        if 'exception' in execute:
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            execute['exception'] = cPickle.loads(execute['exception'])
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        return execute
 
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            return cPickle.loads(execute['exception'])
 
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        else:
 
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            return execute
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    def set_vars(self, variables):