def handle_ticket_request(cls, stream, destination):
log.debug("Trying to create a ticket to serve %s to %s", stream,
destination)
new_ticket = cls._already_streaming(stream, destination)
if new_ticket:
log.info("%s already has a ticket for %s (%s)", destination,
stream, new_ticket)
if not new_ticket.source == Node.me():
log.info("Refreshing with source %s to be sure",
new_ticket.source)
existing_ticket = cls._request_stream_from_node(
stream, new_ticket.source, destination)
else:
existing_ticket = new_ticket
if existing_ticket:
existing_ticket.refreshed = datetime.datetime.now()
# In case we lost the tunnel, just make sure it exists
existing_ticket.queue_tunnel_creation()
session.commit()
return existing_ticket
log.info(
"%s didn't confirm our old ticket %s, must get a new "
"one", new_ticket.source, new_ticket)
if stream.source != Node.me():
new_ticket = cls._offer_ourselves(stream, destination)
if new_ticket:
log.info("We can stream %s to %s, created %s", stream,
destination, new_ticket)
# In case we lost the tunnel, just make sure it exists
new_ticket.queue_tunnel_creation()
elif Node.me().supernode or destination == Node.me():
log.info(
"Propagating the request for streaming %s to %s to "
"our other known nodes", stream, destination)
new_ticket = cls._request_stream_from_others(
stream, destination)
else:
raise HTTPError(412)
else:
new_ticket = Ticket(stream=stream,
source_port=stream.source_port,
destination=destination)
log.info("%s is the source of %s, created %s", Node.me(), stream,
new_ticket)
session.commit()
return new_ticket
def _offer_ourselves(cls, stream, destination):
tickets = Ticket.query.filter_by(source=Node.me())
if (tickets.count() >= settings.OUTGOING_STREAM_LIMIT
or Node.me().upstream and tickets.count() *
settings.STREAM_BITRATE > Node.me().upstream):
log.info("Can't stream %s to %s, already at limit", stream,
destination)
raise HTTPError(412)
ticket = Ticket.get_by(stream=stream, destination=Node.me())
if ticket:
new_ticket = Ticket(stream=stream,
destination=destination,
source_port=ticket.source_port,
hops=ticket.hops + 1)
log.info(
"We are receiving %s and have room to forward -- "
"created %s to potentially forward to %s", stream, new_ticket,
destination)
return new_ticket
except RequestFailed, e:
if e.response.status_int == 412:
log.debug("%s didn't have room to forward %s to us", node,
stream)
else:
if existing_ticket:
return existing_ticket
if ticket_data:
source = Node.get_by(uuid=ticket_data['source'])
if not source:
source_node_data = NodesAPI(node.uri()).get(
Node.absolute_url(source))
source = Node.from_dict(source_node_data)
return Ticket(stream=stream,
source=source,
source_port=ticket_data['source_port'],
destination=destination,
hops=ticket_data['hops'] + 1)
@classmethod
def _request_stream_from_watchers(cls,
stream,
destination,
unconfirmed_tickets=None):
tickets = []
for ticket in Ticket.query.filter_by(stream=stream):
if cls._already_seeding(ticket):
return [ticket]
else:
if not cls._already_ticketed(unconfirmed_tickets,
ticket.destination):
