Mass Deface
0:
# don't bother reporting the empty string (source of subtle bugs)
self.collect_incoming_data (self.ac_in_buffer[:index])
self.ac_in_buffer = self.ac_in_buffer[index+terminator_len:]
# This does the Right Thing if the terminator is changed here.
self.found_terminator()
else:
# check for a prefix of the terminator
index = find_prefix_at_end (self.ac_in_buffer, terminator)
if index:
if index != lb:
# we found a prefix, collect up to the prefix
self.collect_incoming_data (self.ac_in_buffer[:-index])
self.ac_in_buffer = self.ac_in_buffer[-index:]
break
else:
# no prefix, collect it all
self.collect_incoming_data (self.ac_in_buffer)
self.ac_in_buffer = ''
def handle_write (self):
self.initiate_send()
def handle_close (self):
self.close()
def push (self, data):
sabs = self.ac_out_buffer_size
if len(data) > sabs:
for i in xrange(0, len(data), sabs):
self.producer_fifo.append(data[i:i+sabs])
else:
self.producer_fifo.append(data)
self.initiate_send()
def push_with_producer (self, producer):
self.producer_fifo.append(producer)
self.initiate_send()
def readable (self):
"predicate for inclusion in the readable for select()"
# cannot use the old predicate, it violates the claim of the
# set_terminator method.
# return (len(self.ac_in_buffer) <= self.ac_in_buffer_size)
return 1
def writable (self):
"predicate for inclusion in the writable for select()"
return self.producer_fifo or (not self.connected)
def close_when_done (self):
"automatically close this channel once the outgoing queue is empty"
self.producer_fifo.append(None)
def initiate_send(self):
while self.producer_fifo and self.connected:
first = self.producer_fifo[0]
# handle empty string/buffer or None entry
if not first:
del self.producer_fifo[0]
if first is None:
self.handle_close()
return
# handle classic producer behavior
obs = self.ac_out_buffer_size
try:
with catch_warnings():
if py3kwarning:
filterwarnings("ignore", ".*buffer", DeprecationWarning)
data = buffer(first, 0, obs)
except TypeError:
data = first.more()
if data:
self.producer_fifo.appendleft(data)
else:
del self.producer_fifo[0]
continue
# send the data
try:
num_sent = self.send(data)
except socket.error:
self.handle_error()
return
if num_sent:
if num_sent < len(data) or obs < len(first):
self.producer_fifo[0] = first[num_sent:]
else:
del self.producer_fifo[0]
# we tried to send some actual data
return
def discard_buffers (self):
# Emergencies only!
self.ac_in_buffer = ''
del self.incoming[:]
self.producer_fifo.clear()
class simple_producer:
def __init__ (self, data, buffer_size=512):
self.data = data
self.buffer_size = buffer_size
def more (self):
if len (self.data) > self.buffer_size:
result = self.data[:self.buffer_size]
self.data = self.data[self.buffer_size:]
return result
else:
result = self.data
self.data = ''
return result
class fifo:
def __init__ (self, list=None):
if not list:
self.list = deque()
else:
self.list = deque(list)
def __len__ (self):
return len(self.list)
def is_empty (self):
return not self.list
def first (self):
return self.list[0]
def push (self, data):
self.list.append(data)
def pop (self):
if self.list:
return (1, self.list.popleft())
else:
return (0, None)
# Given 'haystack', see if any prefix of 'needle' is at its end. This
# assumes an exact match has already been checked. Return the number of
# characters matched.
# for example:
# f_p_a_e ("qwerty\r", "\r\n") => 1
# f_p_a_e ("qwertydkjf", "\r\n") => 0
# f_p_a_e ("qwerty\r\n", "\r\n") =>