def _test_dreply(self, gen_dreply, good, diff_ips_test=False):
for i in range(self.NLISTENERS):
print >> sys.stderr, "test: waiting for #", i, "listenport", self.mylistenport[
i]
conn, addr = self.myss[i].accept()
s = OLConnection(self.mykeypairs[i], '', 0, conn,
self.mylistenport[i])
while True:
msg = s.recv()
self.assert_(len(msg) > 0)
print >> sys.stderr, "test: Received overlay message", getMessageName(
msg[0])
if msg[0] == DIALBACK_REQUEST:
break
self.assert_(msg[0] == DIALBACK_REQUEST)
self.check_drequest(msg[1:])
# Proper behaviour is to try to send a reply using a new return connection
s2 = BTConnection('localhost',
self.hisport,
mylistenport=self.mylistenport[i],
user_infohash=dialback_infohash)
s2.read_handshake_medium_rare(close_ok=True)
if gen_dreply is not None:
resp = gen_dreply(i)
print >> sys.stderr, "test: sending DIALBACK_REPLY #", i
s2.send(resp)
time.sleep(2)
# the other side should always close the
# connection, either because we're done or he didn't like our
# bad DIALBACK_REPLY message
msg = s2.recv()
if len(msg) > 0:
print >> sys.stderr, "test: Received unexpected data", getMessageName(
msg[0])
self.assert_(len(msg) == 0)
s2.close()
# Not really necessary, but helps with test_dialback_active2
s.close()
ext_ip = self.session.get_external_ip()
print >> sys.stderr, "test: External IP address after test is", ext_ip
if diff_ips_test:
if self.config.sessconfig['dialback_trust_superpeers'] == 1:
good = True
else:
good = False
if good:
self.assert_(ext_ip == REPLY_IP)
else:
self.assert_(ext_ip == self.myoriginalip)
def _test_dreply(self,gen_dreply,good,diff_ips_test=False):
for i in range(self.NLISTENERS):
print >> sys.stderr,"test: waiting for #",i,"listenport",self.mylistenport[i]
conn, addr = self.myss[i].accept()
s = OLConnection(self.mykeypairs[i],'',0,conn,self.mylistenport[i])
while True:
msg = s.recv()
self.assert_(len(msg) > 0)
print >> sys.stderr,"test: Received overlay message",getMessageName(msg[0])
if msg[0] == DIALBACK_REQUEST:
break
self.assert_(msg[0] == DIALBACK_REQUEST)
self.check_drequest(msg[1:])
# Proper behaviour is to try to send a reply using a new return connection
s2 = BTConnection('localhost',self.hisport,mylistenport=self.mylistenport[i],user_infohash=dialback_infohash)
s2.read_handshake_medium_rare(close_ok = True)
if gen_dreply is not None:
resp = gen_dreply(i)
print >> sys.stderr,"test: sending DIALBACK_REPLY #",i
s2.send(resp)
time.sleep(2)
# the other side should always close the
# connection, either because we're done or he didn't like our
# bad DIALBACK_REPLY message
msg = s2.recv()
if len(msg) > 0:
print >> sys.stderr,"test: Received unexpected data",getMessageName(msg[0])
self.assert_(len(msg)==0)
s2.close()
# Not really necessary, but helps with test_dialback_active2
s.close()
ext_ip = self.session.get_external_ip()
print >>sys.stderr,"test: External IP address after test is",ext_ip
if diff_ips_test:
if self.config.sessconfig['dialback_trust_superpeers'] == 1:
good = True
else:
good = False
if good:
self.assert_(ext_ip == REPLY_IP)
else:
self.assert_(ext_ip == self.myoriginalip)
def receive_crawler_reply(self, sock, message_id, channel_id):
# Sending a reply from a Tribler peer to a Crawler
# SIZE INDEX
# 1 byte: 0 CRAWLER_REPLY (from BaseLib.Core.BitTornado.BT1.MessageID)
# 1 byte: 1 --MESSAGE-SPECIFIC-ID--
# 1 byte: 2 Channel id
# 1 byte: 3 Parts left
# 1 byte: 4 Indicating success (0) or failure (non 0)
# n byte: 5... Reply payload
if DEBUG:
print >>sys.stderr, "test_crawler: receive_crawler_reply: waiting for channel",channel_id
parts = []
while True:
response = sock.recv()
if response:
if response[0] == CRAWLER_REPLY and response[1] == message_id and ord(response[2]) == channel_id:
parts.append(response[5:])
if DEBUG:
print >>sys.stderr, "test_crawler: received", getMessageName(response[0:2]), "channel", channel_id, "length", sum([len(part) for part in parts]), "parts left", ord(response[3])
if ord(response[3]):
# there are parts left
continue
return ord(response[4]), "".join(parts)
return -1, ""
def handleMessage(self, permid, selversion, message):
""" Called by NetworkThread """
if DEBUG:
print >> sys.stderr, "olbridge: handleMessage", show_permid_short(
permid), selversion, getMessageName(
message[0]), currentThread().getName()
def olbridge_handle_msg_func():
# Called by OverlayThread
if DEBUG:
print >> sys.stderr, "olbridge: handle_msg_func", show_permid_short(
permid), selversion, getMessageName(
message[0]), currentThread().getName()
try:
if self.olappsmsghandler is None:
ret = True
else:
ret = self.olappsmsghandler(permid, selversion, message)
except:
print_exc()
ret = False
if ret == False:
self.close(permid)
self.tqueue.add_task(olbridge_handle_msg_func, 0)
return True
def _send_request(self,
permid,
message_id,
channel_id,
payload,
frequency=3600,
callback=None):
"""
Send a CRAWLER_REQUEST message to permid. This method assumes
that connection exists to the permid.
@param permid The destination peer
@param message_id The message id
@param payload The message content
@param frequency Destination peer will return a frequency-error when this message_id has been received within the last frequency seconds
@param callback Callable function/method is called when request is send with 2 paramaters (exc, permid)
@return The message channel-id > 0 on success, and 0 on failure
"""
# Sending a request from a Crawler to a Tribler peer
# SIZE INDEX
# 1 byte: 0 CRAWLER_REQUEST (from BaseLib.Core.BitTornado.BT1.MessageID)
# 1 byte: 1 --MESSAGE-SPECIFIC-ID--
# 1 byte: 2 Channel id
# 2 byte: 3+4 Frequency
# n byte: 5... Request payload
def _after_send_request(exc, permid):
if DEBUG:
if exc:
print >> sys.stderr, "crawler: could not send request to", show_permid_short(
permid), exc
if exc:
self._release_channel_id(permid, channel_id)
# call the optional callback supplied with send_request
if callback:
callback(exc, permid)
if DEBUG:
print >> sys.stderr, "crawler: sending", getMessageName(
CRAWLER_REQUEST + message_id), "with", len(
payload), "bytes payload to", show_permid_short(permid)
self._overlay_bridge.send(
permid, "".join(
(CRAWLER_REQUEST, message_id, chr(channel_id & 0xFF),
chr((frequency >> 8) & 0xFF) + chr(frequency & 0xFF),
str(payload))), _after_send_request)
return channel_id
def olbridge_handle_msg_func():
# Called by OverlayThread
if DEBUG:
print >> sys.stderr, "olbridge: handle_msg_func", show_permid_short(
permid), selversion, getMessageName(
message[0]), currentThread().getName()
try:
if self.olappsmsghandler is None:
ret = True
else:
ret = self.olappsmsghandler(permid, selversion, message)
except:
print_exc()
ret = False
if ret == False:
self.close(permid)
def got_message(self,dns,message):
""" received message from peer, pass to upper layer """
if DEBUG:
print >> sys.stderr,"dlbreturn: got_message",getMessageName(message[0])
if self.usermsghandler is None:
if DEBUG:
print >> sys.stderr,"dlbreturn: User receive callback not set"
return
try:
ret = self.usermsghandler(dns,message)
if ret is None:
if DEBUG:
print >> sys.stderr,"dlbreturn: INTERNAL ERROR:", \
"User receive callback returned None, not True or False"
ret = False
return ret
except:
# Catch all
print_exc(file=sys.stderr)
return False
def got_message(self, dns, message):
""" received message from peer, pass to upper layer """
if DEBUG:
print >> sys.stderr, "dlbreturn: got_message", getMessageName(
message[0])
if self.usermsghandler is None:
if DEBUG:
print >> sys.stderr, "dlbreturn: User receive callback not set"
return
try:
ret = self.usermsghandler(dns, message)
if ret is None:
if DEBUG:
print >> sys.stderr,"dlbreturn: INTERNAL ERROR:", \
"User receive callback returned None, not True or False"
ret = False
return ret
except:
# Catch all
print_exc(file=sys.stderr)
return False
def test_good_get_metadata_url(self):
# 1. Establish overlay connection to Tribler
s = OLConnection(self.my_keypair,'localhost',self.hisport)
for tdef in [self.tdef1,self.tdef2]:
msg = self.create_good_get_metadata(tdef.get_infohash())
s.send(msg)
try:
s.b.s.settimeout(10.0)
resp = s.recv()
self.assert_(len(resp) > 0)
print >>sys.stderr,"test: Got reply",getMessageName(resp[0])
self.assert_(resp[0] == METADATA)
self.check_metadata(resp[1:],tdef)
except socket.timeout:
print >> sys.stderr,"test: Timeout, bad, peer didn't reply with METADATA message"
self.assert_(False)
s.close()
def test_good_get_metadata_url(self):
# 1. Establish overlay connection to Tribler
s = OLConnection(self.my_keypair,'localhost',self.hisport)
for tdef in [self.tdef1,self.tdef2]:
msg = self.create_good_get_metadata(tdef.get_infohash())
s.send(msg)
try:
s.b.s.settimeout(10.0)
resp = s.recv()
self.assert_(len(resp) > 0)
print >>sys.stderr,time.asctime(),'-', "test: Got reply",getMessageName(resp[0])
self.assert_(resp[0] == METADATA)
self.check_metadata(resp[1:],tdef)
except socket.timeout:
print >> sys.stderr,time.asctime(),'-', "test: Timeout, bad, peer didn't reply with METADATA message"
self.assert_(False)
s.close()
def subtest_invalid_messageid(self):
"""
Send an invalid message-id from a registered crawler peer
"""
print >>sys.stderr, "-"*80, "\ntest: invalid_messageid"
# make sure that the OLConnection IS in the crawler_db
crawler_db = CrawlerDBHandler.getInstance()
crawler_db.temporarilyAddCrawler(self.my_permid)
# We are a registered crawler, start sending invalid messages
messages = [CRAWLER_REQUEST,
CRAWLER_REQUEST + chr(0),
CRAWLER_REPLY,
CRAWLER_REPLY + chr(0)]
for msg in messages:
s = OLConnection(self.my_keypair, "localhost", self.hisport)
s.send(msg)
response = s.recv()
assert response == "", "response type is %s" % getMessageName(response[0])
time.sleep(1)
s.close()
def _test_qreply(self,gen_qreply,good):
print >> sys.stderr,"test: waiting for reply"
s = self.openconn
msg = s.recv()
self.assert_(len(msg) > 0)
print >> sys.stderr,"test: Received overlay message",getMessageName(msg[0])
self.assert_(msg[0] == QUERY)
id = self.check_rquery(msg[1:])
resp = gen_qreply(id)
print >> sys.stderr,"test: sending QUERY_REPLY"
s.send(resp)
if good:
time.sleep(10)
# the other side should not have closed the connection, as
# this is all valid, so this should not throw an exception:
s.send('bla')
s.close()
else:
# the other side should not like this and close the connection
self.assert_(len(s.recv())==0)
s.close()
def _send_request(self, permid, message_id, channel_id, payload, frequency=3600, callback=None):
"""
Send a CRAWLER_REQUEST message to permid. This method assumes
that connection exists to the permid.
@param permid The destination peer
@param message_id The message id
@param payload The message content
@param frequency Destination peer will return a frequency-error when this message_id has been received within the last frequency seconds
@param callback Callable function/method is called when request is send with 2 paramaters (exc, permid)
@return The message channel-id > 0 on success, and 0 on failure
"""
# Sending a request from a Crawler to a Tribler peer
# SIZE INDEX
# 1 byte: 0 CRAWLER_REQUEST (from BaseLib.Core.BitTornado.BT1.MessageID)
# 1 byte: 1 --MESSAGE-SPECIFIC-ID--
# 1 byte: 2 Channel id
# 2 byte: 3+4 Frequency
# n byte: 5... Request payload
def _after_send_request(exc, permid):
if DEBUG:
if exc:
print >> sys.stderr, "crawler: could not send request to", show_permid_short(permid), exc
if exc:
self._release_channel_id(permid, channel_id)
# call the optional callback supplied with send_request
if callback:
callback(exc, permid)
if DEBUG: print >> sys.stderr, "crawler: sending", getMessageName(CRAWLER_REQUEST+message_id), "with", len(payload), "bytes payload to", show_permid_short(permid)
self._overlay_bridge.send(permid, "".join((CRAWLER_REQUEST,
message_id,
chr(channel_id & 0xFF),
chr((frequency >> 8) & 0xFF) + chr(frequency & 0xFF),
str(payload))), _after_send_request)
return channel_id
def subtest_invalid_permid(self):
"""
Send crawler messages from a non-crawler peer
"""
print >>sys.stderr, "-"*80, "\ntest: invalid_permid"
# make sure that the OLConnection is NOT in the crawler_db
crawler_db = CrawlerDBHandler.getInstance()
assert not self.my_permid in crawler_db.getCrawlers()
# We are not a registered crawler, any request from us should
# be denied
messages = [CRAWLER_REQUEST,
CRAWLER_REQUEST + CRAWLER_DATABASE_QUERY,
CRAWLER_REQUEST + CRAWLER_DATABASE_QUERY,
CRAWLER_REQUEST + chr(0)]
for msg in messages:
s = OLConnection(self.my_keypair, "localhost", self.hisport)
s.send(msg)
response = s.recv()
assert response == "", "response type is %s" % getMessageName(response[0])
time.sleep(1)
s.close()
def _test_qreply(self, gen_qreply, good):
print >> sys.stderr, "test: waiting for reply"
s = self.openconn
msg = s.recv()
self.assert_(len(msg) > 0)
print >> sys.stderr, "test: Received overlay message", getMessageName(
msg[0])
self.assert_(msg[0] == QUERY)
id = self.check_rquery(msg[1:])
resp = gen_qreply(id)
print >> sys.stderr, "test: sending QUERY_REPLY"
s.send(resp)
if good:
time.sleep(10)
# the other side should not have closed the connection, as
# this is all valid, so this should not throw an exception:
s.send('bla')
s.close()
else:
# the other side should not like this and close the connection
self.assert_(len(s.recv()) == 0)
s.close()
def handle_reply(self, permid, selversion, message):
"""
Received CRAWLER_REPLY message from OverlayApps
"""
if selversion >= OLPROTO_VER_SEVENTH and len(message) >= 5 and message[1] in self._message_handlers:
message_id = message[1]
channel_id = ord(message[2])
parts_left = ord(message[3])
error = ord(message[4])
# A request must exist in self._channels, otherwise we did
# not request this reply
if permid in self._channels and channel_id in self._channels[permid]:
# add part to buffer
self._channels[permid][channel_id][1] += message[5:]
if parts_left:
# todo: register some event to remove the buffer
# after a time (in case connection is lost before
# all parts are received)
if DEBUG: print >> sys.stderr, "crawler: received", getMessageName(CRAWLER_REPLY+message_id), "with", len(message), "bytes payload from", show_permid_short(permid), "with", parts_left, "parts left"
# Can't do anything until all parts have been received
return True
else:
timestamp, payload, channel_data = self._channels[permid].pop(channel_id)
if DEBUG:
if error == 253:
# unknown message error (probably because
# the crawler is newer than the peer)
print >> sys.stderr, "crawler: received", getMessageName(CRAWLER_REPLY+message_id), "with", len(message), "bytes payload from", show_permid_short(permid), "indicating an unknown message error"
if error == 254:
# frequency error (we did this request recently)
print >> sys.stderr, "crawler: received", getMessageName(CRAWLER_REPLY+message_id), "with", len(message), "bytes payload from", show_permid_short(permid), "indicating a frequency error"
else:
print >> sys.stderr, "crawler: received", getMessageName(CRAWLER_REPLY+message_id), "with", len(payload), "bytes payload from", show_permid_short(permid)
if not self._channels[permid]:
del self._channels[permid]
def send_request_helper(message_id, payload, frequency=3600, callback=None, channel_data=None):
return self.send_request(permid, message_id, payload, frequency=frequency, callback=callback, channel_data=channel_data)
# 20/10/08. Boudewijn: We will no longer
# disconnect based on the return value from the
# message handler
try:
self._message_handlers[message_id][1](permid, selversion, channel_id, channel_data, error, payload, send_request_helper)
except:
print_exc()
return True
else:
# reply from unknown permid or channel
if DEBUG: print >> sys.stderr, "crawler: received", getMessageName(CRAWLER_REPLY+message_id), "with", len(payload), "bytes payload from", show_permid_short(permid), "from unknown peer or unused channel"
if DEBUG:
if len(message) >= 2:
message_id = message[1]
else:
message_id = ""
print >> sys.stderr, "crawler: received", getMessageName(CRAWLER_REPLY+message_id), "with", len(message), "bytes from", show_permid_short(permid), "from unknown peer or unused channel"
return False
def _send_reply(self, permid, message_id, channel_id, payload, error=0, callback=None):
"""
Send a CRAWLER_REPLY message to permid. This method assumes
that connection exists to the permid.
@param permid The destination peer
@param message_id The message id
@param channel_id The channel id. Used to match replies to requests
@param payload The message content
@param error The error code. (0: no-error, 253: unknown-message, 254: frequency-error, 255: reserved)
@param callback Callable function/method is called when request is send with 2 paramaters (exc, permid)
@return The message channel-id > 0 on success, and 0 on failure
"""
# Sending a reply from a Tribler peer to a Crawler
# SIZE INDEX
# 1 byte: 0 CRAWLER_REPLY (from BaseLib.Core.BitTornado.BT1.MessageID)
# 1 byte: 1 --MESSAGE-SPECIFIC-ID--
# 1 byte: 2 Channel id
# 1 byte: 3 Parts left
# 1 byte: 4 Indicating success (0) or failure (non 0)
# n byte: 5... Reply payload
if len(payload) > MAX_PAYLOAD_LENGTH:
remaining_payload = payload[MAX_PAYLOAD_LENGTH:]
def _after_send_reply(exc, permid):
"""
Called after the overlay attempted to send a reply message
"""
if DEBUG:
print >> sys.stderr, "crawler: _after_send_reply", show_permid_short(permid), exc
if not exc:
self.send_reply(permid, message_id, channel_id, remaining_payload, error=error)
# call the optional callback supplied with send_request
if callback:
callback(exc, permid)
# 03/06/09 boudewijn: parts_left may be no larger than 255
# because we only use one byte to store the 'parts
# left'. This does not mean that there can't be more than
# 255 parts!
parts_left = min(255, int(len(payload) / MAX_PAYLOAD_LENGTH))
payload = payload[:MAX_PAYLOAD_LENGTH]
else:
def _after_send_reply(exc, permid):
if DEBUG:
if exc:
print >> sys.stderr, "crawler: could not send request", show_permid_short(permid), exc
# call the optional callback supplied with send_request
if callback:
callback(exc, permid)
parts_left = 0
# remove from self._channels if it is still there (could
# have been remove during periodic timeout check)
if permid in self._channels and channel_id in self._channels[permid]:
del self._channels[permid][channel_id]
if not self._channels[permid]:
del self._channels[permid]
if DEBUG: print >> sys.stderr, "crawler: sending", getMessageName(CRAWLER_REPLY+message_id), "with", len(payload), "bytes payload to", show_permid_short(permid)
self._overlay_bridge.send(permid, "".join((CRAWLER_REPLY,
message_id,
chr(channel_id & 0xFF),
chr(parts_left & 0xFF),
chr(error & 0xFF),
str(payload))), _after_send_reply)
return channel_id
def olbridge_handle_msg_func():
# Called by OverlayThread
if DEBUG:
print >>sys.stderr,"olbridge: handle_msg_func",show_permid_short(permid),selversion,getMessageName(message[0]),currentThread().getName()
try:
if self.olappsmsghandler is None:
ret = True
else:
ret = self.olappsmsghandler(permid,selversion,message)
except:
print_exc()
ret = False
if ret == False:
if DEBUG:
print >>sys.stderr,"olbridge: olbridge_handle_msg_func closing!",show_permid_short(permid),selversion,getMessageName(message[0]),currentThread().getName()
self.close(permid)
def handleMessage(self,permid,selversion,message):
""" Called by NetworkThread """
#ProxyService_
#
# DEBUG
#print "### olbridge: handleMessage", show_permid_short(permid), selversion, getMessageName(message[0]), currentThread().getName()
#
#_ProxyService
if DEBUG:
print >>sys.stderr,"olbridge: handleMessage",show_permid_short(permid),selversion,getMessageName(message[0]),currentThread().getName()
def olbridge_handle_msg_func():
# Called by OverlayThread
if DEBUG:
print >>sys.stderr,"olbridge: handle_msg_func",show_permid_short(permid),selversion,getMessageName(message[0]),currentThread().getName()
try:
if self.olappsmsghandler is None:
ret = True
else:
ret = self.olappsmsghandler(permid,selversion,message)
except:
print_exc()
ret = False
if ret == False:
if DEBUG:
print >>sys.stderr,"olbridge: olbridge_handle_msg_func closing!",show_permid_short(permid),selversion,getMessageName(message[0]),currentThread().getName()
self.close(permid)
self.tqueue.add_task(olbridge_handle_msg_func,0)
return True
def handle_reply(self, permid, selversion, message):
"""
Received CRAWLER_REPLY message from OverlayApps
"""
if selversion >= OLPROTO_VER_SEVENTH and len(
message) >= 5 and message[1] in self._message_handlers:
message_id = message[1]
channel_id = ord(message[2])
parts_left = ord(message[3])
error = ord(message[4])
# A request must exist in self._channels, otherwise we did
# not request this reply
if permid in self._channels and channel_id in self._channels[
permid]:
# add part to buffer
self._channels[permid][channel_id][1] += message[5:]
if parts_left:
# todo: register some event to remove the buffer
# after a time (in case connection is lost before
# all parts are received)
if DEBUG:
print >> sys.stderr, "crawler: received", getMessageName(
CRAWLER_REPLY + message_id), "with", len(
message
), "bytes payload from", show_permid_short(
permid), "with", parts_left, "parts left"
# Can't do anything until all parts have been received
return True
else:
timestamp, payload, channel_data = self._channels[
permid].pop(channel_id)
if DEBUG:
if error == 253:
# unknown message error (probably because
# the crawler is newer than the peer)
print >> sys.stderr, "crawler: received", getMessageName(
CRAWLER_REPLY + message_id), "with", len(
message
), "bytes payload from", show_permid_short(
permid
), "indicating an unknown message error"
if error == 254:
# frequency error (we did this request recently)
print >> sys.stderr, "crawler: received", getMessageName(
CRAWLER_REPLY + message_id), "with", len(
message
), "bytes payload from", show_permid_short(
permid), "indicating a frequency error"
else:
print >> sys.stderr, "crawler: received", getMessageName(
CRAWLER_REPLY + message_id), "with", len(
payload
), "bytes payload from", show_permid_short(
permid)
if not self._channels[permid]:
del self._channels[permid]
def send_request_helper(message_id,
payload,
frequency=3600,
callback=None,
channel_data=None):
return self.send_request(permid,
message_id,
payload,
frequency=frequency,
callback=callback,
channel_data=channel_data)
# 20/10/08. Boudewijn: We will no longer
# disconnect based on the return value from the
# message handler
try:
self._message_handlers[message_id][1](
permid, selversion, channel_id, channel_data,
error, payload, send_request_helper)
except:
print_exc()
return True
else:
# reply from unknown permid or channel
if DEBUG:
print >> sys.stderr, "crawler: received", getMessageName(
CRAWLER_REPLY + message_id), "with", len(
payload), "bytes payload from", show_permid_short(
permid), "from unknown peer or unused channel"
if DEBUG:
if len(message) >= 2:
message_id = message[1]
else:
message_id = ""
print >> sys.stderr, "crawler: received", getMessageName(
CRAWLER_REPLY + message_id), "with", len(
message), "bytes from", show_permid_short(
permid), "from unknown peer or unused channel"
return False
def _send_reply(self,
permid,
message_id,
channel_id,
payload,
error=0,
callback=None):
"""
Send a CRAWLER_REPLY message to permid. This method assumes
that connection exists to the permid.
@param permid The destination peer
@param message_id The message id
@param channel_id The channel id. Used to match replies to requests
@param payload The message content
@param error The error code. (0: no-error, 253: unknown-message, 254: frequency-error, 255: reserved)
@param callback Callable function/method is called when request is send with 2 paramaters (exc, permid)
@return The message channel-id > 0 on success, and 0 on failure
"""
# Sending a reply from a Tribler peer to a Crawler
# SIZE INDEX
# 1 byte: 0 CRAWLER_REPLY (from BaseLib.Core.BitTornado.BT1.MessageID)
# 1 byte: 1 --MESSAGE-SPECIFIC-ID--
# 1 byte: 2 Channel id
# 1 byte: 3 Parts left
# 1 byte: 4 Indicating success (0) or failure (non 0)
# n byte: 5... Reply payload
if len(payload) > MAX_PAYLOAD_LENGTH:
remaining_payload = payload[MAX_PAYLOAD_LENGTH:]
def _after_send_reply(exc, permid):
"""
Called after the overlay attempted to send a reply message
"""
if DEBUG:
print >> sys.stderr, "crawler: _after_send_reply", show_permid_short(
permid), exc
if not exc:
self.send_reply(permid,
message_id,
channel_id,
remaining_payload,
error=error)
# call the optional callback supplied with send_request
if callback:
callback(exc, permid)
# 03/06/09 boudewijn: parts_left may be no larger than 255
# because we only use one byte to store the 'parts
# left'. This does not mean that there can't be more than
# 255 parts!
parts_left = min(255, int(len(payload) / MAX_PAYLOAD_LENGTH))
payload = payload[:MAX_PAYLOAD_LENGTH]
else:
def _after_send_reply(exc, permid):
if DEBUG:
if exc:
print >> sys.stderr, "crawler: could not send request", show_permid_short(
permid), exc
# call the optional callback supplied with send_request
if callback:
callback(exc, permid)
parts_left = 0
# remove from self._channels if it is still there (could
# have been remove during periodic timeout check)
if permid in self._channels and channel_id in self._channels[
permid]:
del self._channels[permid][channel_id]
if not self._channels[permid]:
del self._channels[permid]
if DEBUG:
print >> sys.stderr, "crawler: sending", getMessageName(
CRAWLER_REPLY + message_id), "with", len(
payload), "bytes payload to", show_permid_short(permid)
self._overlay_bridge.send(
permid, "".join(
(CRAWLER_REPLY, message_id, chr(channel_id & 0xFF),
chr(parts_left & 0xFF), chr(error & 0xFF), str(payload))),
_after_send_reply)
return channel_id
