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Diffstat (limited to 'sugar/p2p/Stream.py')
| -rw-r--r-- | sugar/p2p/Stream.py | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/sugar/p2p/Stream.py b/sugar/p2p/Stream.py deleted file mode 100644 index b3239b3..0000000 --- a/sugar/p2p/Stream.py +++ /dev/null @@ -1,160 +0,0 @@ -# Copyright (C) 2006, Red Hat, Inc. -# -# This library is free software; you can redistribute it and/or -# modify it under the terms of the GNU Lesser General Public -# License as published by the Free Software Foundation; either -# version 2 of the License, or (at your option) any later version. -# -# This library is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -# Lesser General Public License for more details. -# -# You should have received a copy of the GNU Lesser General Public -# License along with this library; if not, write to the -# Free Software Foundation, Inc., 59 Temple Place - Suite 330, -# Boston, MA 02111-1307, USA. - -import xmlrpclib -import socket -import traceback -import random -import logging - -import network -from MostlyReliablePipe import MostlyReliablePipe -from sugar.presence import Service - -def is_multicast_address(address): - """Simple numerical check for whether an IP4 address - is in the range for multicast addresses or not.""" - if not address: - return False - if address[3] != '.': - return False - first = int(float(address[:3])) - if first >= 224 and first <= 239: - return True - return False - -class Stream(object): - def __init__(self, service): - if not service.get_port(): - raise ValueError("service must have an address.") - self._service = service - self._reader_port = self._service.get_port() - self._writer_port = self._reader_port - self._address = self._service.get_address() - self._callback = None - - def new_from_service(service, start_reader=True): - if is_multicast_address(service.get_address()): - return MulticastStream(service) - else: - return UnicastStream(service, start_reader) - new_from_service = staticmethod(new_from_service) - - def set_data_listener(self, callback): - self._callback = callback - - def _recv(self, address, data): - if self._callback: - self._callback(address, data) - - -class UnicastStreamWriter(object): - def __init__(self, stream, service): - # set up the writer - self._service = service - if not service.get_address(): - raise ValueError("service must have a valid address.") - self._address = self._service.get_address() - self._port = self._service.get_port() - self._xmlrpc_addr = "http://%s:%d" % (self._address, self._port) - self._writer = network.GlibServerProxy(self._xmlrpc_addr) - - def write(self, xmlrpc_data): - """Write some data to the default endpoint of this pipe on the remote server.""" - try: - self._writer.message(None, None, xmlrpc_data) - return True - except (socket.error, xmlrpclib.Fault, xmlrpclib.ProtocolError): - traceback.print_exc() - return False - - def custom_request(self, method_name, request_cb, user_data, *args): - """Call a custom XML-RPC method on the remote server.""" - try: - method = getattr(self._writer, method_name) - method(request_cb, user_data, *args) - return True - except (socket.error, xmlrpclib.Fault, xmlrpclib.ProtocolError): - traceback.print_exc() - return False - - -class UnicastStream(Stream): - def __init__(self, service, start_reader=True): - """Initializes the stream. If the 'start_reader' argument is True, - the stream will initialize and start a new stream reader, if it - is False, no reader will be created and the caller must call the - start_reader() method to start the stream reader and be able to - receive any data from the stream.""" - Stream.__init__(self, service) - if start_reader: - self.start_reader() - - def start_reader(self): - """Start the stream's reader, which for UnicastStream objects is - and XMLRPC server. If there's a port conflict with some other - service, the reader will try to find another port to use instead. - Returns the port number used for the reader.""" - # Set up the reader - self._reader = network.GlibXMLRPCServer(("", self._reader_port)) - self._reader.register_function(self._message, "message") - - def _message(self, message): - """Called by the XMLRPC server when network data arrives.""" - address = network.get_authinfo() - self._recv(address, message) - return True - - def register_reader_handler(self, handler, name): - """Register a custom message handler with the reader. This call - adds a custom XMLRPC method call with the name 'name' to the reader's - XMLRPC server, which then calls the 'handler' argument back when - a method call for it arrives over the network.""" - if name == "message": - raise ValueError("Handler name 'message' is a reserved handler.") - self._reader.register_function(handler, name) - - def new_writer(self, service): - """Return a new stream writer object.""" - return UnicastStreamWriter(self, service) - - -class MulticastStream(Stream): - def __init__(self, service): - Stream.__init__(self, service) - self._service = service - self._internal_start_reader() - - def start_reader(self): - return self._reader_port - - def _internal_start_reader(self): - logging.debug('Start multicast stream, address %s, port %d' % (self._address, self._reader_port)) - if not self._service.get_address(): - raise ValueError("service must have a valid address.") - self._pipe = MostlyReliablePipe('', self._address, self._reader_port, - self._recv_data_cb) - self._pipe.start() - - def write(self, data): - self._pipe.send(data) - - def _recv_data_cb(self, address, data, user_data=None): - self._recv(address[0], data) - - def new_writer(self, service=None): - return self |