71 lines
1.6 KiB
Python
71 lines
1.6 KiB
Python
##
|
|
# Copyright 2007 Steve 'Tarka' Smith (tarka@internode.on.net)
|
|
# Distributed under the same terms as Deluge
|
|
##
|
|
|
|
from exceptions import Exception
|
|
from struct import unpack
|
|
import gzip, socket
|
|
|
|
class PGException(Exception):
|
|
pass
|
|
|
|
# Incrementally reads PeerGuardian blocklists v1 and v2.
|
|
# See http://wiki.phoenixlabs.org/wiki/P2B_Format
|
|
class PGReader:
|
|
|
|
def __init__(self, filename):
|
|
print "PGReader loading",filename
|
|
|
|
# FIXME: Catch and convert exception?
|
|
self.fd = gzip.open(filename, "rb")
|
|
|
|
# 4 bytes, should be 0xffffffff
|
|
buf = self.fd.read(4)
|
|
hdr = unpack("l", buf)[0]
|
|
if hdr != -1:
|
|
print "LEADER IS",hdr
|
|
raise PGException("Invalid leader %d"%hdr)
|
|
|
|
magic = self.fd.read(3)
|
|
if magic != "P2B":
|
|
raise PGException("Invalid magic code")
|
|
|
|
buf = self.fd.read(1)
|
|
ver = ord(buf)
|
|
if ver != 1 and ver != 2:
|
|
raise PGException("Invalid version %d" % ver)
|
|
|
|
|
|
def numentries(self):
|
|
save = self.fd.tell()
|
|
self.fd.seek(8)
|
|
count = 0
|
|
while self.next():
|
|
count += 1
|
|
self.fd.seek(save)
|
|
return count
|
|
|
|
|
|
def next(self):
|
|
|
|
# Skip over the string
|
|
buf = -1
|
|
while buf != 0:
|
|
buf = self.fd.read(1)
|
|
if buf == "": # EOF
|
|
return False
|
|
buf = ord(buf)
|
|
|
|
buf = self.fd.read(4)
|
|
start = socket.inet_ntoa(buf)
|
|
|
|
buf = self.fd.read(4)
|
|
end = socket.inet_ntoa(buf)
|
|
|
|
return (start, end)
|
|
|
|
def close(self):
|
|
self.fd.close()
|
|
|