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import xmlrpclib
import socket
import traceback
import threading
import pygtk
pygtk.require('2.0')
import gobject
import network
from MostlyReliablePipe import MostlyReliablePipe
class Stream(object):
def __init__(self, service, group):
if not service:
raise ValueError("service must be valid")
self._service = service
self._group = group
self._owner_nick_name = self._group.get_owner().get_nick_name()
self._port = self._service.get_port()
self._address = self._service.get_address()
self._callback = None
def new_from_service(service, group):
if service.is_multicast():
return MulticastStream(service, group)
else:
return UnicastStream(service, group)
new_from_service = staticmethod(new_from_service)
def set_data_listener(self, callback):
self._callback = callback
def recv(self, nick_name, data):
if nick_name != self._owner_nick_name:
if self._callback:
self._callback(self._group.get_buddy(nick_name), data)
class UnicastStreamWriterBase(object):
def __init__(self, stream, service, owner_nick_name):
# set up the writer
if not service:
raise ValueError("service must be valid")
self._service = service
self._owner_nick_name = owner_nick_name
self._address = self._service.get_address()
self._port = self._service.get_port()
self._xmlrpc_addr = "http://%s:%d" % (self._address, self._port)
class UnicastStreamWriter(UnicastStreamWriterBase):
def __init__(self, stream, service, owner_nick_name):
UnicastStreamWriterBase.__init__(self, stream, service, owner_nick_name)
self._writer = xmlrpclib.ServerProxy(self._xmlrpc_addr)
def write(self, data):
"""Write some data to the default endpoint of this pipe on the remote server."""
try:
self._writer.message(self._owner_nick_name, data)
return True
except (socket.error, xmlrpclib.Fault, xmlrpclib.ProtocolError):
traceback.print_exc()
return False
def custom_request(self, method_name, *args):
"""Call a custom XML-RPC method on the remote server."""
try:
method = getattr(self._writer, method_name)
return method(*args)
except (socket.error, xmlrpclib.Fault, xmlrpclib.ProtocolError):
pass
#traceback.print_exc()
return None
class ThreadedRequest(threading.Thread):
def __init__(self, controller, addr, method, response_cb, user_data, *args):
threading.Thread.__init__(self)
self._controller = controller
self._method = method
self._args = args
self._response_cb = response_cb
self._user_data = user_data
self._writer = xmlrpclib.ServerProxy(addr)
def run(self):
response = None
try:
method = getattr(self._writer, self._method)
response = method(*self._args)
except (socket.error, xmlrpclib.Fault, xmlrpclib.ProtocolError):
traceback.print_exc()
if self._response_cb:
gobject.idle_add(self._response_cb, response, self._user_data)
self._controller.notify_request_done(self)
class ThreadedUnicastStreamWriter(UnicastStreamWriterBase):
def __init__(self, stream, service, owner_nick_name):
self._requests_lock = threading.Lock()
self._requests = []
UnicastStreamWriterBase.__init__(self, stream, service, owner_nick_name)
def _add_request(self, request):
self._requests_lock.acquire()
if not request in self._requests:
self._requests.append(request)
self._requests_lock.release()
def write(self, response_cb, user_data, data):
"""Write some data to the default endpoint of this pipe on the remote server."""
request = ThreadedRequest(self, self._xmlrpc_addr, "message", response_cb,
user_data, self._owner_nick_name, data)
self._add_request(request)
request.start()
def custom_request(self, method_name, response_cb, user_data, *args):
"""Call a custom XML-RPC method on the remote server."""
request = ThreadedRequest(self, self._xmlrpc_addr, method_name, response_cb,
user_data, *args)
self._add_request(request)
request.start()
def notify_request_done(self, request):
self._requests_lock.acquire()
if request in self._requests:
self._requests.remove(request)
self._requests_lock.release()
class UnicastStream(Stream):
def __init__(self, service, group):
Stream.__init__(self, service, group)
self._setup()
def _setup(self):
# Set up the reader
started = False
tries = 10
port = self._service.get_port()
self._reader = None
while not started and tries > 0:
try:
self._reader = network.GlibXMLRPCServer(("", port))
self._reader.register_function(self._message, "message")
started = True
except(socket.error):
port = port + 1
tries = tries - 1
self._service.set_port(port)
def _message(self, nick_name, message):
"""Called by the XMLRPC server when network data arrives."""
self.recv(nick_name, message)
return True
def register_handler(self, handler, name):
if name == "message":
raise ValueError("Handler name 'message' is a reserved handler.")
self._reader.register_function(handler, name)
def new_writer(self, service, threaded=False):
if threaded:
return ThreadedUnicastStreamWriter(self, service, self._owner_nick_name)
else:
return UnicastStreamWriter(self, service, self._owner_nick_name)
class MulticastStream(Stream):
def __init__(self, service, group):
Stream.__init__(self, service, group)
self._address = self._service.get_group_address()
self._setup()
def _setup(self):
self._pipe = MostlyReliablePipe('', self._address, self._port, self._recv_data_cb)
self._pipe.start()
def write(self, data):
self._pipe.send(self._owner_nick_name + " |**| " + data)
def _recv_data_cb(self, addr, data, user_data=None):
[ nick_name, data ] = data.split(" |**| ", 2)
self.recv(nick_name, data)
def new_writer(self, service=None, threaded=False):
return self
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