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])
