view src/plugins/plugin_exp_command_export.py @ 1316:8adcdf2cdfe1 frontends_multi_profiles

core: added a "profileConnecting" method check: if a plugin has a profileConnecting method, it will be called when the profile is being connected but before the client stream is started. That can be usefull if things need to be done before the communication is started: e.g. putting triggers, loading PersistentDict, etc.
author Goffi <goffi@goffi.org>
date Mon, 09 Feb 2015 21:39:51 +0100
parents 301b342c697a
children 0befb14ecf62
line wrap: on
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#!/usr/bin/python
# -*- coding: utf-8 -*-

# SAT plugin to export commands (experimental)
# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jérôme Poisson (goffi@goffi.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from sat.core.i18n import _
from sat.core.log import getLogger
log = getLogger(__name__)
from twisted.words.protocols.jabber import jid
from twisted.internet import reactor, protocol

from sat.tools.misc import SkipOtherTriggers
from sat.tools.utils import clean_ustr

PLUGIN_INFO = {
    "name": "Command export plugin",
    "import_name": "EXP-COMMANS-EXPORT",
    "type": "EXP",
    "protocols": [],
    "dependencies": [],
    "main": "CommandExport",
    "handler": "no",
    "description": _("""Implementation of command export""")
}

class ExportCommandProtocol(protocol.ProcessProtocol):
    """ Try to register an account with prosody """

    def __init__(self, parent, target, options, profile):
        self.parent = parent
        self.target = target
        self.options = options
        self.profile = profile

    def _clean(self, data):
        if not data:
            log.error ("data should not be empty !")
            return u""
        decoded = data.decode('utf-8', 'ignore')[:-1 if data[-1] == '\n' else None]
        return clean_ustr(decoded)

    def connectionMade(self):
        log.info("connectionMade :)")

    def outReceived(self, data):
        self.parent.host.sendMessage(self.target, self._clean(data), no_trigger=True, profile_key=self.profile) 

    def errReceived(self, data):
        self.parent.host.sendMessage(self.target, self._clean(data), no_trigger=True, profile_key=self.profile) 

    def processEnded(self, reason):
        log.info (u"process finished: %d" % (reason.value.exitCode,))
        self.parent.removeProcess(self.target, self)

    def write(self, message):
        self.transport.write(message.encode('utf-8'))

    def boolOption(self, key):
        """ Get boolean value from options
        @param key: name of the option
        @return: True if key exists and set to "true" (case insensitive),
                 False in all other cases """
        value = self.options.get(key, "")
        return value.lower() == "true"


class CommandExport(object):
    """Command export plugin: export a command to an entity"""
    #XXX: This plugin can be potentially dangerous if we don't trust entities linked
    #     this is specially true if we have other triggers.

    def __init__(self, host):
        log.info(_("Plugin command export initialization"))
        self.host = host
        self.spawned = {} # key = entity
        host.trigger.add("MessageReceived", self.MessageReceivedTrigger, priority=10000)
        host.bridge.addMethod("exportCommand", ".plugin", in_sign='sasasa{ss}s', out_sign='', method=self._exportCommand)

    def removeProcess(self, entity, process):
        """ Called when the process is finished
        @param entity: jid.JID attached to the process
        @param process: process to remove"""
        try:
            processes_set = self.spawned[(entity, process.profile)]
            processes_set.discard(process)
            if not processes_set:
                del(self.spawned[(entity, process.profile)])
        except ValueError:
            pass

    def MessageReceivedTrigger(self, message, post_treat, profile):
        """ Check if source is linked and repeat message, else do nothing  """
        from_jid = jid.JID(message["from"])
        spawned_key = (from_jid.userhostJID(), profile)
        try:
            body = [e for e in message.elements() if e.name == 'body'][0]
        except IndexError:
            # do not block message without body (chat state notification...)
            log.warning("No body element found in message, following normal behaviour")
            return True

        mess_data = unicode(body) + '\n'

        if spawned_key in self.spawned:
            processes_set = self.spawned[spawned_key]
            _continue = False
            exclusive = False
            for process in processes_set:
                process.write(mess_data)
                _continue &= process.boolOption("continue")
                exclusive |= process.boolOption("exclusive")
            if exclusive:
                raise SkipOtherTriggers
            return _continue

        return True

    def _exportCommand(self, command, args, targets, options, profile_key):
        """ Export a commands to authorised targets
        @param command: full path of the command to execute
        @param args: list of arguments, with command name as first one
        @param targets: list of allowed entities
        @param options: export options, a dict which can have the following keys ("true" to set booleans):
                        - exclusive: if set, skip all other triggers
                        - loop: if set, restart the command once terminated #TODO
                        - pty: if set, launch in a pseudo terminal
                        - continue: continue normal MessageReceived handling
        """
        profile = self.host.memory.getProfileName(profile_key)
        if not profile:
            log.warning("Unknown profile [%s]" % (profile,))
            return
        
        for target in targets:
            try:
                _jid = jid.JID(target)
                if not _jid.user or not _jid.host:
                    raise jid.InvalidFormat
                _jid = _jid.userhostJID()
            except (jid.InvalidFormat, RuntimeError):
                log.info(u"invalid target ignored: %s" % (target,))
                continue
            process_prot = ExportCommandProtocol(self, _jid, options, profile)
            self.spawned.setdefault((_jid, profile),set()).add(process_prot)
            reactor.spawnProcess(process_prot, command, args, usePTY = process_prot.boolOption('pty'))