def parse_allowed(self):
if self.parse_pending:
return
self.parse_pending = True
df = ThreadedDeferred(wrap_task(self.rawserver.external_add_task),
self._parse_allowed, daemon=True)
def eb(etup):
self.parse_pending = False
self._print_exc("parse_dir: ", etup)
df.addCallbacks(self._parse_allowed_finished, eb)
def save_dfile(self):
if self.save_pending:
return
self.save_pending = True
# if this is taking all the time, threading it won't help anyway because
# of the GIL
#state = bencode(self.state)
state = cPickle.dumps(self.state) # pickle handles Unicode.
df = ThreadedDeferred(wrap_task(self.rawserver.external_add_task),
self._save_dfile, state)
def cb(r):
self.save_pending = False
if NOISY:
self._print_event( "save_dfile: Completed" )
def eb(etup):
self.save_pending = False
self._print_exc( "save_dfile: ", etup )
df.addCallbacks(cb, eb)
class Rerequester(object):
STATES = ['started', 'completed', 'stopped']
def __init__(self, url, announce_list, config, sched, externalsched, rawserver,
howmany, connect,
amount_left, up, down, port, myid, infohash, errorfunc, doneflag,
upratefunc, downratefunc, ever_got_incoming, diefunc, sfunc):
"""
@param url: tracker's announce URL.
@param announce_list: ?
@param config: preferences obj storing BitTorrent-wide
configuration.
@param sched: used to schedule events from inside rawserver's
thread. (Oh boy. externalsched and sched.
We expect Rerequester to
recognize the difference between rawserver's
thread and yet we go through the trouble of
abstracting away rawserver using a callback...
So what was the point? --Dave)
@param externalsched: see sched. This one is called from outside
rawserver's thread.
@param howmany: callback to get the number of complete connections.
@param connect: callback to establish a connection to a peer
obtained from the tracker.
@param amount_left: callback to obtain the number of bytes left to
download for this torrent.
@param up: callback to obtain the total number of bytes sent
for this torrent.
@param down: callback to obtain the total number of bytes
received for this torrent.
@param port: port to report to the tracker. If the local peer
is behind a NAT then this is the local peer's port
on the NAT facing the outside world.
@param myid: local peer's unique (self-generated) id.
@param infohash: hash of the info section of the metainfo file.
@param errorfunc: callback to report errors.
@param doneflag: when set all threads cleanup and then terminate.
@param upratefunc: callback to obtain moving average rate on the
uplink for this torrent.
@param downratefunc: callback to obtain moving average rate on the
downlink for this torrent.
@param ever_got_incoming: callback to determine if this torrent
has ever received any mesages from other peers.
@param diefunc: callback that is called when announce fails to find
any peers.
@param sfunc: success function? With regard to what? --Dave
"""
assert isinstance(url, str)
assert isinstance(config, Preferences)
assert type(port) in (int,long) and port > 0 and port < 65536, "Port: %s" % repr(port)
assert callable(connect)
assert callable(externalsched)
assert callable(amount_left)
assert callable(errorfunc)
assert isinstance(doneflag, threading._Event)
assert callable(upratefunc)
assert callable(downratefunc)
assert callable(ever_got_incoming)
assert callable(diefunc)
assert callable(sfunc)
self.rawserver = rawserver
self.dead = False
self.baseurl = url
self.announce_list = None
if announce_list:
# shuffle a new copy of the whole set only once
shuffled_announce_list = []
for tier in announce_list:
if not tier:
# strip blank lists
continue
shuffled_tier = list(tier)
random.shuffle(shuffled_tier)
shuffled_announce_list.append(shuffled_tier)
if shuffled_announce_list:
self.announce_list = shuffled_announce_list
self.tier = 0
self.announce_i = 0
self.baseurl = self.announce_list_next()
self.announce_infohash = infohash
self.peerid = None
self.wanted_peerid = myid
self.port = port
self.url = None
self.config = config
self.last = None
self.trackerid = None
self.announce_interval = 30 * 60
self.sched = sched
self.howmany = howmany
self.connect = connect
self.externalsched = externalsched
self.amount_left = amount_left
self.up = up
self.down = down
self.errorfunc = errorfunc
self.doneflag = doneflag
self.upratefunc = upratefunc
self.downratefunc = downratefunc
self.ever_got_incoming = ever_got_incoming
self.diefunc = diefunc
self.successfunc = sfunc
self.finish = False
self.running_df = None
self.current_started = None
self.fail_wait = None
self.last_time = bttime()
self.previous_down = 0
self.previous_up = 0
self.tracker_num_peers = None
self.tracker_num_seeds = None
def _makeurl(self, peerid, port):
return ('%s?info_hash=%s&peer_id=%s&port=%s&key=%s' %
(self.baseurl, quote(self.announce_infohash), quote(peerid), str(port),
b2a_hex(''.join([chr(random.randrange(256)) for i in xrange(4)]))))
def change_port(self, peerid, port):
assert thread.get_ident() == self.rawserver.ident
self.wanted_peerid = peerid
self.port = port
self.last = None
self.trackerid = None
self._check()
def begin(self):
if self.sched:
self.sched(10, self.begin)
self._check()
def announce_list_success(self):
tmp = self.announce_list[self.tier].pop(self.announce_i)
self.announce_list[self.tier].insert(0, tmp)
self.tier = 0
self.announce_i = 0
def announce_list_fail(self):
"""returns True if the announce-list was restarted"""
self.announce_i += 1
if self.announce_i == len(self.announce_list[self.tier]):
self.announce_i = 0
self.tier += 1
if self.tier == len(self.announce_list):
self.tier = 0
return True
return False
def announce_list_next(self):
return self.announce_list[self.tier][self.announce_i]
def announce_finish(self):
if self.dead:
return
self.finish = True
self._check()
def announce_stop(self):
if self.dead:
return
self._announce('stopped')
def _check(self):
assert thread.get_ident() == self.rawserver.ident
assert not self.dead
#self.errorfunc(logging.INFO, 'check: ' + str(self.current_started))
if self.current_started is not None:
if self.current_started <= bttime() - 58:
self.errorfunc(logging.WARNING,
_("Tracker announce still not complete "
"%d seconds after starting it") %
int(bttime() - self.current_started))
return
if self.peerid is None:
self.peerid = self.wanted_peerid
self.url = self._makeurl(self.peerid, self.port)
self._announce('started')
return
if self.peerid != self.wanted_peerid:
# _announce will clean up these
up = self.up
down = self.down
self._announce('stopped')
self.peerid = None
self.previous_up = up()
self.previous_down = down()
return
if self.finish:
self.finish = False
self._announce('completed')
return
if self.fail_wait is not None:
if self.last_time + self.fail_wait <= bttime():
self._announce()
return
if self.last_time > bttime() - self.config['rerequest_interval']:
return
if self.ever_got_incoming():
getmore = self.howmany() <= self.config['min_peers'] / 3
else:
getmore = self.howmany() < self.config['min_peers']
if getmore or bttime() - self.last_time > self.announce_interval:
self._announce()
def get_next_announce_time_est(self):
# I'm sure this is wrong, but _check is confusing
return bttime() - (self.last_time + self.announce_interval)
def _announce(self, event=None):
assert not self.dead
assert thread.get_ident() == self.rawserver.ident
self.current_started = bttime()
self.errorfunc(logging.INFO, 'announce: ' + str(self.current_started))
s = ('%s&uploaded=%s&downloaded=%s&left=%s' %
(self.url, str(self.up()*self.config.get('lie',1) - self.previous_up),
str(self.down() - self.previous_down), str(self.amount_left())))
if self.last is not None:
s += '&last=' + quote(str(self.last))
if self.trackerid is not None:
s += '&trackerid=' + quote(str(self.trackerid))
if self.howmany() >= self.config['max_initiate']:
s += '&numwant=0'
else:
s += '&compact=1'
if event is not None:
s += '&event=' + event
def _start_announce(*a):
self.running_df = ThreadedDeferred(_wrap_task(self.externalsched),
self._rerequest, s, self.peerid,
daemon=True)
def _rerequest_finish(x):
self.running_df = None
def _rerequest_error(e):
self.errorfunc(logging.ERROR, _("Rerequest failed!"),
exception=True, exc_info=e)
self.running_df.addCallbacks(_rerequest_finish, _rerequest_error)
if event == 'stopped':
# if self._rerequest needs any state, pass it through args
self.cleanup()
if not event:
assert self.running_df == None, "Previous rerequest event is still running!"
if self.running_df:
self.running_df.addCallback(_start_announce)
else:
_start_announce()
# Must destroy all references that could cause reference circles
def cleanup(self):
assert thread.get_ident() == self.rawserver.ident
self.dead = True
self.sched = None
self.howmany = None
self.connect = None
self.externalsched = lambda *args: None
self.amount_left = None
self.up = None
self.down = None
# don't zero this one, we need it on shutdown w/ error
#self.errorfunc = None
self.upratefunc = None
self.downratefunc = None
self.ever_got_incoming = None
self.diefunc = None
self.successfunc = None
def _rerequest(self, url, peerid):
if self.config['ip']:
try:
url += '&ip=' + socket.gethostbyname(self.config['ip'])
except:
self.errorfunc(logging.WARNING,
_("Problem resolving config ip (%s), gethostbyname failed") % self.config['ip'],
exc_info=sys.exc_info())
request = Request(url)
request.add_header('User-Agent', 'BitTorrent/' + version)
if self.config['tracker_proxy']:
request.set_proxy(self.config['tracker_proxy'], 'http')
try:
h = urlopen(request)
data = h.read()
h.close()
# urllib2 can raise various crap that doesn't have a common base
# exception class especially when proxies are used, at least
# ValueError and stuff from httplib
except Exception, e:
try:
s = unicode(e.args[0])
except:
s = unicode(e)
r = _("Problem connecting to tracker - %s: %s") % (e.__class__, s)
def f():
self._postrequest(errormsg=r, exc=e, peerid=peerid)
else:
