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kaklik |
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# Written by John Hoffman
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# see LICENSE.txt for license information
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from cStringIO import StringIO
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#from RawServer import RawServer
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try:
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True
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except:
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True = 1
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False = 0
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from BT1.Encrypter import protocol_name
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default_task_id = []
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class SingleRawServer:
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def __init__(self, info_hash, multihandler, doneflag, protocol):
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self.info_hash = info_hash
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self.doneflag = doneflag
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self.protocol = protocol
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self.multihandler = multihandler
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self.rawserver = multihandler.rawserver
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self.finished = False
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self.running = False
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self.handler = None
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self.taskqueue = []
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def shutdown(self):
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if not self.finished:
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self.multihandler.shutdown_torrent(self.info_hash)
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def _shutdown(self):
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if not self.finished:
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self.finished = True
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self.running = False
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self.rawserver.kill_tasks(self.info_hash)
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if self.handler:
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self.handler.close_all()
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def _external_connection_made(self, c, options, already_read):
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if self.running:
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c.set_handler(self.handler)
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self.handler.externally_handshaked_connection_made(
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c, options, already_read)
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### RawServer functions ###
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def add_task(self, func, delay=0, id = default_task_id):
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if id is default_task_id:
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id = self.info_hash
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if not self.finished:
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self.rawserver.add_task(func, delay, id)
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# def bind(self, port, bind = '', reuse = False):
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# pass # not handled here
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def start_connection(self, dns, handler = None):
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if not handler:
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handler = self.handler
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c = self.rawserver.start_connection(dns, handler)
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return c
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# def listen_forever(self, handler):
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# pass # don't call with this
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def start_listening(self, handler):
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self.handler = handler
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self.running = True
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return self.shutdown # obviously, doesn't listen forever
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def is_finished(self):
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return self.finished
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def get_exception_flag(self):
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return self.rawserver.get_exception_flag()
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class NewSocketHandler: # hand a new socket off where it belongs
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def __init__(self, multihandler, connection):
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self.multihandler = multihandler
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self.connection = connection
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connection.set_handler(self)
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self.closed = False
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self.buffer = StringIO()
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self.complete = False
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self.next_len, self.next_func = 1, self.read_header_len
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self.multihandler.rawserver.add_task(self._auto_close, 15)
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def _auto_close(self):
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if not self.complete:
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self.close()
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def close(self):
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if not self.closed:
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self.connection.close()
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self.closed = True
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# header format:
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# connection.write(chr(len(protocol_name)) + protocol_name +
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# (chr(0) * 8) + self.encrypter.download_id + self.encrypter.my_id)
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# copied from Encrypter and modified
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def read_header_len(self, s):
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l = ord(s)
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return l, self.read_header
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def read_header(self, s):
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self.protocol = s
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return 8, self.read_reserved
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def read_reserved(self, s):
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self.options = s
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return 20, self.read_download_id
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def read_download_id(self, s):
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if self.multihandler.singlerawservers.has_key(s):
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if self.multihandler.singlerawservers[s].protocol == self.protocol:
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return True
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return None
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def read_dead(self, s):
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return None
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def data_came_in(self, garbage, s):
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while True:
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if self.closed:
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return
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i = self.next_len - self.buffer.tell()
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if i > len(s):
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self.buffer.write(s)
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return
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self.buffer.write(s[:i])
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s = s[i:]
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m = self.buffer.getvalue()
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self.buffer.reset()
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self.buffer.truncate()
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try:
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x = self.next_func(m)
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except:
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self.next_len, self.next_func = 1, self.read_dead
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raise
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if x is None:
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self.close()
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return
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if x == True: # ready to process
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self.multihandler.singlerawservers[m]._external_connection_made(
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self.connection, self.options, s)
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self.complete = True
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return
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self.next_len, self.next_func = x
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def connection_flushed(self, ss):
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pass
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def connection_lost(self, ss):
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self.closed = True
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class MultiHandler:
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def __init__(self, rawserver, doneflag):
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self.rawserver = rawserver
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self.masterdoneflag = doneflag
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self.singlerawservers = {}
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self.connections = {}
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self.taskqueues = {}
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def newRawServer(self, info_hash, doneflag, protocol=protocol_name):
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new = SingleRawServer(info_hash, self, doneflag, protocol)
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self.singlerawservers[info_hash] = new
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return new
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def shutdown_torrent(self, info_hash):
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self.singlerawservers[info_hash]._shutdown()
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del self.singlerawservers[info_hash]
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def listen_forever(self):
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self.rawserver.listen_forever(self)
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for srs in self.singlerawservers.values():
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srs.finished = True
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srs.running = False
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srs.doneflag.set()
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### RawServer handler functions ###
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# be wary of name collisions
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def external_connection_made(self, ss):
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NewSocketHandler(self, ss)
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