Exemple #1
0
    def __init__(self, pack: XDCCPack, retry: bool = False):
        """
        Initializes the XDCC IRC client
        :param pack: The pack to downloadX
        :param retry: Set to true for retried downloads.
        """
        self.logger = Logger()

        # Save us from decoding errors!
        irc.client.ServerConnection.buffer_class.errors = "replace"

        self.user = User()
        self.pack = pack
        self.server = pack.server
        self.downloading = False
        self.xdcc_timestamp = 0
        self.channels = None  # change to list if channel joins are required
        self.message_sent = False
        self.connect_start_time = 0

        # XDCC state variables
        self.peer_address = ""
        self.peer_port = -1
        self.filesize = -1
        self.progress = 0
        self.xdcc_file = None
        self.xdcc_connection = None
        self.retry = retry

        if not self.retry:
            if self.download_limit == -1:
                limit = "\"unlimited\""
            else:
                limit = str(self.download_limit)
            self.logger.info("Download Limit set to: " + limit)

        super().__init__()
Exemple #2
0
    def __init__(self,
                 pack: XDCCPack,
                 retry: bool = False,
                 timeout: int = 120,
                 fallback_channel: Optional[str] = None,
                 throttle: Union[int, str] = -1):
        """
        Initializes the XDCC IRC client
        :param pack: The pack to downloadX
        :param retry: Set to true for retried downloads.
        :param timeout: Sets the timeout time for starting downloads
        :param fallback_channel: A fallback channel for when whois
                                 fails to find a valid channel
        :param throttle: Throttles the download to n bytes per second.
                         If this value is <= 0, the download speed will be
                         unlimited
        """
        self.logger = ColorLogger(logging.getLogger(self.__class__.__name__),
                                  warning_bg=Back.RED,
                                  warning_fg=Fore.BLACK)

        # Save us from decoding errors and excessive logging output!
        irc.client.ServerConnection.buffer_class.errors = "replace"
        irc.client.log.setLevel(logging.ERROR)

        if isinstance(throttle, str):
            self.download_limit = byte_string_to_byte_count(throttle)
        else:
            self.download_limit = throttle
        if self.download_limit <= 0:
            self.download_limit = -1

        self.user = User()
        self.pack = pack
        self.server = pack.server
        self.downloading = False
        self.xdcc_timestamp = 0.0
        self.channels = None  # type: Optional[List[str]]
        self.message_sent = False
        self.connect_start_time = 0.0
        self.timeout = timeout
        self.timed_out = False
        self.fallback_channel = fallback_channel
        self.connected = True
        self.disconnected = False

        # XDCC state variables
        self.peer_address = ""
        self.peer_port = -1
        self.filesize = -1
        self.progress = 0
        self.xdcc_file = None  # type: Optional[IO[Any]]
        self.xdcc_connection = None  # type: Optional[DCCConnection]
        self.retry = retry
        self.struct_format = b"!I"
        self.ack_lock = Lock()

        if not self.retry:
            if self.download_limit == -1:
                limit = "\"unlimited\""
            else:
                limit = str(self.download_limit)
            self.logger.info("Download Limit set to: " + limit)

        self.timeout_watcher_thread = Thread(target=self.timeout_watcher)
        self.progress_printer_thread = Thread(target=self.progress_printer)

        super().__init__()
Exemple #3
0
class XDCCCLient(SimpleIRCClient):
    """
    IRC Client that can download an XDCC pack
    """

    download_limit = -1
    """
    Maximum speed of the download in bytes/s
    If set to -1, will be unlimited
    """

    # Create a log command for all events that are printed in debug mode.
    # If methods are overriden manually, these generated methods won't take
    # effect.
    for event in irc.events.all:
        exec(
            "def on_{}(self, c, e):\n"
            "   self.logger.debug("
            "       \"{}:\" + str(e.source) + \" \" + str(e.arguments),"
            "       back=Back.BLUE"
            ")".format(event, event)
        )

    def __init__(self, pack: XDCCPack, retry: bool = False):
        """
        Initializes the XDCC IRC client
        :param pack: The pack to downloadX
        :param retry: Set to true for retried downloads.
        """
        self.logger = Logger()

        # Save us from decoding errors!
        irc.client.ServerConnection.buffer_class.errors = "replace"

        self.user = User()
        self.pack = pack
        self.server = pack.server
        self.downloading = False
        self.xdcc_timestamp = 0
        self.channels = None  # change to list if channel joins are required
        self.message_sent = False
        self.connect_start_time = 0

        # XDCC state variables
        self.peer_address = ""
        self.peer_port = -1
        self.filesize = -1
        self.progress = 0
        self.xdcc_file = None
        self.xdcc_connection = None
        self.retry = retry

        if not self.retry:
            if self.download_limit == -1:
                limit = "\"unlimited\""
            else:
                limit = str(self.download_limit)
            self.logger.info("Download Limit set to: " + limit)

        super().__init__()

    def download(self) -> str:
        """
        Downloads the pack
        :return: The path to the downloaded file
        """
        error = False
        completed = False
        pause = 0
        try:
            self.logger.info("Connecting to " + self.server.address + ":" +
                             str(self.server.port))
            self.connect(
                self.server.address,
                self.server.port,
                self.user.username
            )
            self.connect_start_time = time.time()
            self.start()
        except AlreadyDownloadedException:
            self.logger.error("File already downloaded")
            completed = True
        except DownloadCompleted:
            self.logger.print("File " + self.pack.filename +
                              " downloaded successfully")
            completed = True
        except DownloadIncomplete:
            self.logger.print("File " + self.pack.filename +
                              " not downloaded completely")
            completed = False
        except PackAlreadyRequested:
            self.logger.print("Pack already requested.")
            completed = False
            pause = 60
        except UnrecoverableError:
            error = True
        finally:
            self.logger.info("Disconnecting")
            try:
                self._disconnect()
            except (DownloadCompleted, ):
                pass

        if error:
            self.logger.info("Aborting because of unrecoverable error")
            return "Failed"

        self.logger.debug("Pausing for {}s".format(pause))
        time.sleep(pause)

        if not completed:
            self.logger.error("Download Incomplete. Retrying.")
            retry_client = XDCCCLient(self.pack, True)
            retry_client.download_limit = self.download_limit
            retry_client.download()

        if not self.retry:
            dl_time = str(int(abs(time.time() - self.connect_start_time)))
            self.logger.info("Download completed in " + dl_time + " seconds.")

        return self.pack.get_filepath()

    def on_welcome(self, conn: ServerConnection, _: Event):
        """
        The 'welcome' event indicates a successful connection to the server
        Sends a whois command to find the bot on the server
        :param conn: The connection
        :param _: The 'welcome' event
        :return: None
        """
        self.logger.info("Connected to server")
        conn.whois(self.pack.bot)

    def on_whoischannels(self, conn: ServerConnection, event: Event):
        """
        The 'whoischannels' event indicates that a whois request has found
        channels that the bot is a part of.
        Channels that the bot has joined will be joined as well.
        :param conn: The connection
        :param event: The 'whoischannels' event
        :return: None
        """
        self.logger.info("WHOIS: " + str(event.arguments))
        channels = event.arguments[1].split("#")
        channels.pop(0)
        channels = list(map(lambda x: "#" + x.split(" ")[0], channels))
        self.channels = channels

        for channel in self.channels:
            # Join all channels to avoid only joining a members-only channel
            conn.join(channel)

    def on_endofwhois(self, conn: ServerConnection, _: Event):
        """
        The 'endofwhois' event indicates the end of a whois request.
        This manually calls on_join in case the bot
        has not joined any channels.
        :param conn: The connection
        :param _: The 'endofwhois' event
        :return: None
        """
        self.logger.info("WHOIS End")
        if self.channels is None:
            self.on_join(conn, _)

    def on_join(self, conn: ServerConnection, event: Event):
        """
        The 'join' event indicates that a channel was successfully joined.
        The first on_join call will send a message to the bot that requests
        the initialization of the XDCC file transfer.
        :param conn: The connection
        :param event: The 'join' event
        :return: None
        """
        # Make sure we were the ones joining
        if not event.source.startswith(self.user.get_name()):
            return
        self.logger.info("Joined Channel: " + event.target)

        if not self.message_sent:
            self._send_xdcc_request_message(conn)

    def on_ctcp(self, conn: ServerConnection, event: Event):
        """
        The 'ctcp' event indicates that a CTCP message was received.
        The downloader receives a CTCP from the bot to initialize the
        XDCC file transfer.
        Handles DCC ACCEPT and SEND messages. Other DCC messages will result
        in a raised InvalidCTCP exception.
        DCC ACCEPT will only occur when a resume request was sent successfully.
        DCC SEND will occur when the bot offers a file.
        :param conn: The connection
        :param event: The 'ctcp' event
        :return: None
        :raise InvalidCTCPException: In case no valid DCC message was received
        """

        def start_download(append: bool = False):
            """
            Helper method that starts the download of an XDCC pack
            :param append: If set to True, opens the file in append mode
            :return: None
            """
            self.downloading = True
            self.xdcc_timestamp = time.time()
            mode = "ab" if append else "wb"
            self.logger.info("Starting Download (" + mode + ")")
            self.xdcc_file = open(self.pack.get_filepath(), mode)
            self.xdcc_connection = \
                self.dcc_connect(self.peer_address, self.peer_port, "raw")
            self.xdcc_connection.socket.settimeout(5)

        self.logger.info("CTCP Message: " + str(event.arguments))
        if event.arguments[0] == "DCC":
            payload = shlex.split(event.arguments[1])

            if payload[0] == "SEND":

                filename = payload[1]
                self.peer_address = ip_numstr_to_quad(payload[2])
                self.peer_port = int(payload[3])
                self.filesize = int(payload[4])

                self.pack.set_filename(filename)

                if os.path.isfile(self.pack.get_filepath()):

                    position = os.path.getsize(self.pack.get_filepath())

                    if position >= self.filesize:
                        raise AlreadyDownloadedException(self.pack.filename)

                    self.logger.info("Requesting Resume")
                    self.progress = position
                    bot = event.source.split("!")[0]
                    resume_param = "\"" + filename + "\" " + \
                                   str(self.peer_port) + " " + str(position)
                    conn.ctcp("DCC RESUME", bot, resume_param)

                else:
                    start_download()

            elif payload[0] == "ACCEPT":
                start_download(append=True)

            else:
                raise InvalidCTCPException(payload[0])

    def on_dccmsg(self, _: ServerConnection, event: Event):
        """
        The 'dccmsg' event contains the file data.
        :param _: The connection
        :param event: The 'dccmsg' event
        :return: None
        """
        data = event.arguments[0]
        chunk_size = len(data)

        self.xdcc_file.write(data)
        self.progress += chunk_size

        # Limit the download speed
        if self.download_limit != -1:
            delta = abs(time.time() - self.xdcc_timestamp)
            chunk_time = chunk_size / self.download_limit
            sleep_time = chunk_time - delta

            if sleep_time > 0:
                self.logger.debug(
                    "{Throttling for %.2f seconds} " % sleep_time, end=""
                )
                time.sleep(sleep_time)

        percentage = "%.2f" % (100 * (self.progress / self.filesize))
        self.logger.print("[" + self.pack.filename + "]: (" +
                          percentage + "%) |" + str(self.progress) + "|",
                          end="\r", back=Back.LIGHTYELLOW_EX, fore=Fore.BLACK)

        self._ack()
        self.xdcc_timestamp = time.time()

    def on_dcc_disconnect(self, _: ServerConnection, __: Event):
        """
        The 'dccmsg' event contains the file data.
        :param _: The connection
        :param __: The 'dccmsg' event
        :return: None
        """
        self.downloading = False

        if self.xdcc_file is not None:
            self.xdcc_file.close()

        if self.progress >= self.filesize:
            raise DownloadCompleted()
        else:
            raise DownloadIncomplete()

    # noinspection PyMethodMayBeStatic
    def on_privnotice(self, _: ServerConnection, event: Event):
        """
        Handles privnotices. Bots sometimes send privnotices when
        a pack was already requested or the user is put into a queue.

        If the privnotice indicates that a pack was already requested,
        the downloader will pause for 60 seconds

        :param _: The connection
        :param event: The privnotice event
        :return: None
        """
        if "you already requested this pack" in event.arguments[0].lower():
            raise PackAlreadyRequested()
        else:
            self.logger.debug("privnotice: {}:{}".format(
                str(event.source), str(event.arguments), back=Back.BLUE)
            )
        # TODO Handle queues

    def on_error(self, _: ServerConnection, event: Event):
        """
        Sometimes, the connection gives an error which may prove fatal for
        the download process. A possible cause of error events is a banned
        IP address.
        :param _: The connection
        :param event: The error event
        :return: None
        """
        self.logger.error("Unrecoverable Error: Is this IP banned?")
        raise UnrecoverableError()

    def _send_xdcc_request_message(self, conn: ServerConnection):
        """
        Sends an XDCC request message
        :param conn: The connection to use
        :return: None
        """
        msg = self.pack.get_request_message()
        self.logger.info("Send XDCC Message: " + msg)
        self.message_sent = True
        conn.privmsg(self.pack.bot, msg)

    def _ack(self):
        """
        Sends the acknowledgement to the XDCC bot that a
        chunk has been received.
        This process is responsible for the program hanging due to a stuck
        socket.send.
        This is mitigated by completely disconnecting the client and restarting
        the download process with a new XDCC CLient
        :return: None
        """
        try:
            self.xdcc_connection.socket.send(struct.pack(b"!Q", self.progress))
        except socket.error:
            self._disconnect()

    def _disconnect(self):
        """
        Disconnects all connections of the XDCC Client
        :return: None
        """
        self.connection.reactor.disconnect_all()
Exemple #4
0
class XDCCClient(SimpleIRCClient):
    """
    IRC Client that can download an XDCC pack
    """
    def __init__(self,
                 pack: XDCCPack,
                 retry: bool = False,
                 timeout: int = 120,
                 fallback_channel: Optional[str] = None,
                 throttle: Union[int, str] = -1):
        """
        Initializes the XDCC IRC client
        :param pack: The pack to downloadX
        :param retry: Set to true for retried downloads.
        :param timeout: Sets the timeout time for starting downloads
        :param fallback_channel: A fallback channel for when whois
                                 fails to find a valid channel
        :param throttle: Throttles the download to n bytes per second.
                         If this value is <= 0, the download speed will be
                         unlimited
        """
        self.logger = ColorLogger(logging.getLogger(self.__class__.__name__),
                                  warning_bg=Back.RED,
                                  warning_fg=Fore.BLACK)

        # Save us from decoding errors and excessive logging output!
        irc.client.ServerConnection.buffer_class.errors = "replace"
        irc.client.log.setLevel(logging.ERROR)

        if isinstance(throttle, str):
            self.download_limit = byte_string_to_byte_count(throttle)
        else:
            self.download_limit = throttle
        if self.download_limit <= 0:
            self.download_limit = -1

        self.user = User()
        self.pack = pack
        self.server = pack.server
        self.downloading = False
        self.xdcc_timestamp = 0.0
        self.channels = None  # type: Optional[List[str]]
        self.message_sent = False
        self.connect_start_time = 0.0
        self.timeout = timeout
        self.timed_out = False
        self.fallback_channel = fallback_channel
        self.connected = True
        self.disconnected = False

        # XDCC state variables
        self.peer_address = ""
        self.peer_port = -1
        self.filesize = -1
        self.progress = 0
        self.xdcc_file = None  # type: Optional[IO[Any]]
        self.xdcc_connection = None  # type: Optional[DCCConnection]
        self.retry = retry
        self.struct_format = b"!I"
        self.ack_lock = Lock()

        if not self.retry:
            if self.download_limit == -1:
                limit = "\"unlimited\""
            else:
                limit = str(self.download_limit)
            self.logger.info("Download Limit set to: " + limit)

        self.timeout_watcher_thread = Thread(target=self.timeout_watcher)
        self.progress_printer_thread = Thread(target=self.progress_printer)

        super().__init__()

    # Create a log command for all events that are printed in debug mode.
    # If methods are overriden manually, these generated methods won't take
    # effect.
    for event in irc.events.all:
        exec("def on_{}(self, c, e):\n"
             "   self.handle_generic_event(\"{}\", c, e)"
             "".format(event, event))

    def handle_generic_event(self, event_type: str, _: ServerConnection,
                             event: Event):
        """
        Handles a generic event that isn't handled explicitly
        :param event_type: The event type to handle
        :param _: The connection to use
        :param event: The received event
        :return: None
        """
        self.logger.debug("{}:{} {}".format(event_type, event.source,
                                            event.arguments))

    def download(self) -> str:
        """
        Downloads the pack
        :return: The path to the downloaded file
        """
        error = False
        completed = False
        pause = 0

        message = ""

        try:
            self.logger.info("Connecting to " + self.server.address + ":" +
                             str(self.server.port))
            self.connect(self.server.address, self.server.port,
                         self.user.username)
            self.connected = True
            self.connect_start_time = time.time()

            self.timeout_watcher_thread.start()
            self.progress_printer_thread.start()

            self.start()
        except AlreadyDownloadedException:
            self.logger.warning("File already downloaded")
            completed = True
        except DownloadCompleted:
            message = "File {} downloaded successfully"\
                .format(self.pack.filename)
            completed = True
        except DownloadIncomplete:
            message = "File {} not downloaded successfully" \
                .format(self.pack.filename)
            completed = False
        except PackAlreadyRequested:
            message = "Pack already requested."
            completed = False
            pause = 60
        except UnrecoverableError:
            error = True
        finally:
            self.connected = False
            self.disconnected = True
            self.timeout_watcher_thread.join()
            self.progress_printer_thread.join()
            print("\n" + message)

            self.logger.info("Disconnecting")
            try:
                self._disconnect()
            except (DownloadCompleted, ):
                pass

        if error:
            self.logger.info("Aborting because of unrecoverable error")
            return "Failed"

        self.logger.debug("Pausing for {}s".format(pause))
        time.sleep(pause)

        if not completed:
            self.logger.warning("Download Incomplete. Retrying.")
            retry_client = XDCCClient(self.pack, True, self.timeout)
            retry_client.download_limit = self.download_limit
            retry_client.download()

        if not self.retry:
            dl_time = str(int(abs(time.time() - self.connect_start_time)))
            self.logger.info("Download completed in " + dl_time + " seconds.")

        return self.pack.get_filepath()

    def on_ping(self, _: ServerConnection, __: Event):
        """
        Handles a ping event.
        Used for timeout checks
        :param _: The IRC connection
        :param __: The received event
        :return: None
        """
        self.logger.debug("PING")
        if not self.message_sent \
                and self.timeout < (time.time() - self.connect_start_time) \
                and not self.timed_out:
            self.logger.warning("Timeout")
            self.timed_out = True
            raise Timeout()

    def on_nosuchnick(self, _: ServerConnection, __: Event):
        """
        When a bot does not exist or is not online right now, aborts.
        :param _: The IRC connection
        :param __: The received event
        :return: None
        """
        self.logger.warning("This bot does not exist on this server")
        raise BotDoesNotExist()

    def on_welcome(self, conn: ServerConnection, _: Event):
        """
        The 'welcome' event indicates a successful connection to the server
        Sends a whois command to find the bot on the server
        :param conn: The connection
        :param _: The 'welcome' event
        :return: None
        """
        self.logger.info("Connected to server")
        conn.whois(self.pack.bot)

    def on_whoischannels(self, conn: ServerConnection, event: Event):
        """
        The 'whoischannels' event indicates that a whois request has found
        channels that the bot is a part of.
        Channels that the bot has joined will be joined as well.
        :param conn: The connection
        :param event: The 'whoischannels' event
        :return: None
        """
        self.logger.info("WHOIS: " + str(event.arguments))
        channels = event.arguments[1].split("#")
        channels.pop(0)
        channels = list(map(lambda x: "#" + x.split(" ")[0], channels))
        self.channels = channels

        for channel in channels:
            # Join all channels to avoid only joining a members-only channel
            conn.join(channel)

    def on_endofwhois(self, conn: ServerConnection, _: Event):
        """
        The 'endofwhois' event indicates the end of a whois request.
        This manually calls on_join in case the bot
        has not joined any channels.
        :param conn: The connection
        :param _: The 'endofwhois' event
        :return: None
        """
        self.logger.info("WHOIS End")
        if self.channels is None:
            if self.fallback_channel is not None:
                channel = self.fallback_channel
                if not channel.startswith("#"):
                    channel = "#" + channel
                conn.join(channel)
                return
            else:
                self.on_join(conn, _, True)

    def on_join(self,
                conn: ServerConnection,
                event: Event,
                force: bool = False):
        """
        The 'join' event indicates that a channel was successfully joined.
        The first on_join call will send a message to the bot that requests
        the initialization of the XDCC file transfer.
        :param conn: The connection
        :param event: The 'join' event
        :param force: If set to True, will force sending an XDCC message
        :return: None
        """
        # Make sure we were the ones joining
        if not event.source.startswith(self.user.get_name()) and not force:
            return
        if force:
            self.logger.info("Didn't find a channel using WHOIS, "
                             "trying to send message anyways")
        else:
            self.logger.info("Joined Channel: " + event.target)

        if not self.message_sent:
            self._send_xdcc_request_message(conn)

    def on_ctcp(self, conn: ServerConnection, event: Event):
        """
        The 'ctcp' event indicates that a CTCP message was received.
        The downloader receives a CTCP from the bot to initialize the
        XDCC file transfer.
        Handles DCC ACCEPT and SEND messages. Other DCC messages will result
        in a raised InvalidCTCP exception.
        DCC ACCEPT will only occur when a resume request was sent successfully.
        DCC SEND will occur when the bot offers a file.
        :param conn: The connection
        :param event: The 'ctcp' event
        :return: None
        :raise InvalidCTCPException: In case no valid DCC message was received
        """
        def start_download(append: bool = False):
            """
            Helper method that starts the download of an XDCC pack
            :param append: If set to True, opens the file in append mode
            :return: None
            """
            self.xdcc_timestamp = time.time()
            mode = "ab" if append else "wb"
            self.logger.info("Starting Download (" + mode + ")")
            self.downloading = True

            self.xdcc_file = open(self.pack.get_filepath(), mode)
            self.xdcc_connection = self.dcc("raw")
            self.xdcc_connection.connect(self.peer_address, self.peer_port)
            self.xdcc_connection.socket.settimeout(5)

        self.logger.info("CTCP Message: " + str(event.arguments))
        if event.arguments[0] == "DCC":
            payload = shlex.split(event.arguments[1])

            if payload[0] == "SEND":

                filename = payload[1]
                self.peer_address = ip_numstr_to_quad(payload[2])
                self.peer_port = int(payload[3])
                self.filesize = int(payload[4])

                self.pack.set_filename(filename)

                if os.path.isfile(self.pack.get_filepath()):

                    position = os.path.getsize(self.pack.get_filepath())

                    if position >= self.filesize:
                        raise AlreadyDownloadedException(self.pack.filename)

                    self.logger.info("Requesting Resume")
                    self.progress = position
                    bot = event.source.split("!")[0]
                    resume_param = "\"" + filename + "\" " + \
                                   str(self.peer_port) + " " + str(position)
                    conn.ctcp("DCC RESUME", bot, resume_param)

                else:
                    start_download()

            elif payload[0] == "ACCEPT":
                start_download(append=True)

            else:
                raise InvalidCTCPException(payload[0])

    def on_dccmsg(self, _: ServerConnection, event: Event):
        """
        The 'dccmsg' event contains the file data.
        :param _: The connection
        :param event: The 'dccmsg' event
        :return: None
        """
        if self.xdcc_file is None:
            return

        data = event.arguments[0]
        chunk_size = len(data)

        self.xdcc_file.write(data)
        self.progress += chunk_size

        # Limit the download speed
        if self.download_limit != -1:
            delta = abs(time.time() - self.xdcc_timestamp)
            chunk_time = chunk_size / self.download_limit
            sleep_time = chunk_time - delta

            if sleep_time > 0:
                self.logger.debug("{Throttling for %.2f seconds} " %
                                  sleep_time)
                time.sleep(sleep_time)

        self._ack()
        self.xdcc_timestamp = time.time()

    def on_dcc_disconnect(self, _: ServerConnection, __: Event):
        """
        The 'dccmsg' event contains the file data.
        :param _: The connection
        :param __: The 'dccmsg' event
        :return: None
        """
        self.downloading = False

        if self.xdcc_file is not None:
            self.xdcc_file.close()

        if self.progress >= self.filesize:
            raise DownloadCompleted()
        else:
            raise DownloadIncomplete()

    # noinspection PyMethodMayBeStatic
    def on_privnotice(self, _: ServerConnection, event: Event):
        """
        Handles privnotices. Bots sometimes send privnotices when
        a pack was already requested or the user is put into a queue.

        If the privnotice indicates that a pack was already requested,
        the downloader will pause for 60 seconds

        :param _: The connection
        :param event: The privnotice event
        :return: None
        """
        if "you already requested" in event.arguments[0].lower():
            raise PackAlreadyRequested()
        else:
            self.logger.debug("privnotice: {}:{}".format(
                str(event.source), str(event.arguments)))
        # TODO Handle queues

    def on_error(self, _: ServerConnection, __: Event):
        """
        Sometimes, the connection gives an error which may prove fatal for
        the download process. A possible cause of error events is a banned
        IP address.
        :param _: The connection
        :param __: The error event
        :return: None
        """
        self.logger.warning("Unrecoverable Error: Is this IP banned?")
        raise UnrecoverableError()

    def _send_xdcc_request_message(self, conn: ServerConnection):
        """
        Sends an XDCC request message
        :param conn: The connection to use
        :return: None
        """
        msg = self.pack.get_request_message()
        self.logger.info("Send XDCC Message: " + msg)
        self.message_sent = True
        conn.privmsg(self.pack.bot, msg)

    def _ack(self):
        """
        Sends the acknowledgement to the XDCC bot that a chunk
        has been received.
        This process is sometimes responsible for the program hanging due to a
        stuck socket.send.
        This is mitigated by completely disconnecting the client and restarting
        the download process with a new XDCC CLient
        :return: None
        """
        # It seems the DCC connection dies when downloading with
        # max speed and using Q structs. Why that is I do not know.
        # But because of this we'll use progressively larger struct types
        # Whenever the old one gets too small
        try:
            payload = struct.pack(self.struct_format, self.progress)
        except struct.error:

            if self.struct_format == b"!I":
                self.struct_format = b"!L"
            elif self.struct_format == b"!L":
                self.struct_format = b"!Q"
            else:
                self.logger.error("File too large for structs")
                self._disconnect()
                return

            self._ack()
            return

        def acker():
            """
            The actual ack will be sent using a different thread since that
            somehow avoids the socket timing out for some reason.
            :return: None
            """

            self.ack_lock.acquire()
            try:
                self.xdcc_connection.socket.send(payload)
            except socket.timeout:
                self.logger.debug("ACK timed out")
                self._disconnect()
            finally:
                self.ack_lock.release()

        Thread(target=acker).start()

    def _disconnect(self):
        """
        Disconnects all connections of the XDCC Client
        :return: None
        """
        self.connection.reactor.disconnect_all()

    def timeout_watcher(self):
        """
        Monitors when the XDCC  message is sent. If it is not sent by the
        timeout time, a ping will be sent and handled by the on_ping method
        :return: None
        """
        while not self.connected:
            pass
        self.logger.info("Timeout watcher started")
        while not self.message_sent and not self.disconnected:
            time.sleep(1)
            self.logger.debug("Iterating timeout thread")
            if self.timeout < (time.time() - self.connect_start_time):
                self.logger.info("Timeout detected")
                self.connection.ping(self.server.address)
                time.sleep(2)
        self.logger.info("Message sent without timeout")

    def progress_printer(self):
        """
        Prints the download progress
        Should run in a separate thread to avoid blocking up the IO which
        could lead to reduced download speeds
        :return: None
        """
        speed_progress = []
        while not self.downloading and not self.disconnected:
            pass
        self.logger.info("Progress Printer started")
        time.sleep(1)

        printing = self.downloading and not self.disconnected
        while printing:
            speed = "0B/s"
            printing = self.downloading and not self.disconnected

            speed_progress.append({
                "timestamp": time.time(),
                "progress": self.progress
            })
            while len(speed_progress) > 0 \
                    and time.time() - speed_progress[0]["timestamp"] > 7:
                speed_progress.pop(0)

            if len(speed_progress) > 0:
                bytes_delta = self.progress - speed_progress[0]["progress"]
                time_delta = time.time() - speed_progress[0]["timestamp"]
                if time_delta > 0:
                    ratio = int(bytes_delta / time_delta)
                    speed = human_readable_bytes(ratio) + "/s"

            percentage = "%.2f" % (100 * (self.progress / self.filesize))

            log_message = "[{}]: ({}%) |{}/{}| ({})".format(
                self.pack.filename, percentage,
                human_readable_bytes(self.progress,
                                     remove_trailing_zeroes=False),
                human_readable_bytes(self.filesize), speed)
            pprint(log_message, end="\r", bg="lyellow", fg="black")
            time.sleep(0.1)
        self.logger.info("Progress Printer stopped")