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#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""
    Slixmpp: The Slick XMPP Library
    Copyright (C) 2015  Emmanuel Gil Peyrot
    This file is part of Slixmpp.

    See the file LICENSE for copying permission.
"""

import asyncio
import logging
from getpass import getpass
from argparse import ArgumentParser

import slixmpp
from slixmpp.exceptions import IqError, IqTimeout


class S5BSender(slixmpp.ClientXMPP):

    """
    A basic example of creating and using a SOCKS5 bytestream.
    """

    def __init__(self, jid, password, receiver, filename):
        slixmpp.ClientXMPP.__init__(self, jid, password)

        self.receiver = receiver

        self.file = open(filename, 'rb')

        # The session_start event will be triggered when
        # the bot establishes its connection with the server
        # and the XML streams are ready for use.
        self.add_event_handler("session_start", self.start)

    @asyncio.coroutine
    def start(self, event):
        """
        Process the session_start event.

        Typical actions for the session_start event are
        requesting the roster and broadcasting an initial
        presence stanza.

        Arguments:
            event -- An empty dictionary. The session_start
                     event does not provide any additional
                     data.
        """

        try:
            # Open the S5B stream in which to write to.
            proxy = yield from self['xep_0065'].handshake(self.receiver)

            # Send the entire file.
            while True:
                data = self.file.read(1048576)
                if not data:
                    break
                yield from proxy.write(data)

            # And finally close the stream.
            proxy.transport.write_eof()
        except (IqError, IqTimeout):
            print('File transfer errored')
        else:
            print('File transfer finished')
        finally:
            self.file.close()
            self.disconnect()


if __name__ == '__main__':
    # Setup the command line arguments.
    parser = ArgumentParser()

    # Output verbosity options.
    parser.add_argument("-q", "--quiet", help="set logging to ERROR",
                        action="store_const", dest="loglevel",
                        const=logging.ERROR, default=logging.INFO)
    parser.add_argument("-d", "--debug", help="set logging to DEBUG",
                        action="store_const", dest="loglevel",
                        const=logging.DEBUG, default=logging.INFO)

    # JID and password options.
    parser.add_argument("-j", "--jid", dest="jid",
                        help="JID to use")
    parser.add_argument("-p", "--password", dest="password",
                        help="password to use")
    parser.add_argument("-r", "--receiver", dest="receiver",
                        help="JID of the receiver")
    parser.add_argument("-f", "--file", dest="filename",
                        help="file to send")
    parser.add_argument("-m", "--use-messages", action="store_true",
                        help="use messages instead of iqs for file transfer")

    args = parser.parse_args()

    # Setup logging.
    logging.basicConfig(level=args.loglevel,
                        format='%(levelname)-8s %(message)s')

    if args.jid is None:
        args.jid = input("Username: ")
    if args.password is None:
        args.password = getpass("Password: ")
    if args.receiver is None:
        args.receiver = input("Receiver: ")
    if args.filename is None:
        args.filename = input("File path: ")

    # Setup the S5BSender and register plugins. Note that while plugins may
    # have interdependencies, the order in which you register them does
    # not matter.
    xmpp = S5BSender(args.jid, args.password, args.receiver, args.filename)
    xmpp.register_plugin('xep_0030') # Service Discovery
    xmpp.register_plugin('xep_0065') # SOCKS5 Bytestreams

    # Connect to the XMPP server and start processing XMPP stanzas.
    xmpp.connect()
    xmpp.process(forever=False)