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# -*- tab-width: 4; indent-tabs-mode: t -*-
import socket
import threading
import traceback
import select
import time
import xmlrpclib
import sys
import gobject
import SimpleXMLRPCServer
import SocketServer
__authinfos = {}
def _add_authinfo(authinfo):
__authinfos[threading.currentThread()] = authinfo
def get_authinfo():
return __authinfos.get(threading.currentThread())
def _del_authinfo():
del __authinfos[threading.currentThread()]
class GlibTCPServer(SocketServer.TCPServer):
"""GlibTCPServer
Integrate socket accept into glib mainloop.
"""
allow_reuse_address = True
request_queue_size = 20
def __init__(self, server_address, RequestHandlerClass):
SocketServer.TCPServer.__init__(self, server_address, RequestHandlerClass)
self.socket.setblocking(0) # Set nonblocking
# Watch the listener socket for data
gobject.io_add_watch(self.socket, gobject.IO_IN, self._handle_accept)
def _handle_accept(self, source, condition):
if not (condition & gobject.IO_IN):
return True
self.handle_request()
return True
class GlibXMLRPCRequestHandler(SimpleXMLRPCServer.SimpleXMLRPCRequestHandler):
""" GlibXMLRPCRequestHandler
The stock SimpleXMLRPCRequestHandler and server don't allow any way to pass
the client's address and/or SSL certificate into the function that actually
_processes_ the request. So we have to store it in a thread-indexed dict.
"""
def do_POST(self):
_add_authinfo(self.client_address)
try:
SimpleXMLRPCServer.SimpleXMLRPCRequestHandler.do_POST(self)
except socket.timeout:
pass
except socket.error, e:
print "Error (%s): socket error - '%s'" % (self.client_address, e)
except:
print "Error while processing POST:"
traceback.print_exc()
_del_authinfo()
class GlibXMLRPCServer(GlibTCPServer, SimpleXMLRPCServer.SimpleXMLRPCDispatcher):
"""GlibXMLRPCServer
Use nonblocking sockets and handle the accept via glib rather than
blocking on accept().
"""
def __init__(self, addr, requestHandler=GlibXMLRPCRequestHandler, logRequests=1):
self.logRequests = logRequests
SimpleXMLRPCServer.SimpleXMLRPCDispatcher.__init__(self)
GlibTCPServer.__init__(self, addr, requestHandler)
def _marshaled_dispatch(self, data, dispatch_method = None):
"""Dispatches an XML-RPC method from marshalled (XML) data.
XML-RPC methods are dispatched from the marshalled (XML) data
using the _dispatch method and the result is returned as
marshalled data. For backwards compatibility, a dispatch
function can be provided as an argument (see comment in
SimpleXMLRPCRequestHandler.do_POST) but overriding the
existing method through subclassing is the prefered means
of changing method dispatch behavior.
"""
params, method = xmlrpclib.loads(data)
# generate response
try:
if dispatch_method is not None:
response = dispatch_method(method, params)
else:
response = self._dispatch(method, params)
# wrap response in a singleton tuple
response = (response,)
response = xmlrpclib.dumps(response, methodresponse=1)
except xmlrpclib.Fault, fault:
response = xmlrpclib.dumps(fault)
except:
print "Exception while processing request:"
traceback.print_exc()
# report exception back to server
response = xmlrpclib.dumps(
xmlrpclib.Fault(1, "%s:%s" % (sys.exc_type, sys.exc_value))
)
return response
class GroupServer(object):
_MAX_MSG_SIZE = 500
def __init__(self, address, port, data_cb):
self._address = address
self._port = port
self._data_cb = data_cb
self._setup_listener()
def _setup_listener(self):
# Listener socket
self._listen_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# Set some options to make it multicast-friendly
self._listen_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
try:
self._listen_sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
except:
pass
self._listen_sock.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_TTL, 20)
self._listen_sock.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_LOOP, 1)
def start(self):
# Set some more multicast options
self._listen_sock.bind(('', self._port))
self._listen_sock.settimeout(2)
intf = socket.gethostbyname(socket.gethostname())
self._listen_sock.setsockopt(socket.SOL_IP, socket.IP_MULTICAST_IF, socket.inet_aton(intf) + socket.inet_aton('0.0.0.0'))
self._listen_sock.setsockopt(socket.SOL_IP, socket.IP_ADD_MEMBERSHIP, socket.inet_aton(self._address) + socket.inet_aton('0.0.0.0'))
# Watch the listener socket for data
gobject.io_add_watch(self._listen_sock, gobject.IO_IN, self._handle_incoming_data)
def _handle_incoming_data(self, source, condition):
if not (condition & gobject.IO_IN):
return True
msg = {}
msg['data'], (msg['addr'], msg['port']) = source.recvfrom(self._MAX_MSG_SIZE)
if self._data_cb:
self._data_cb(msg)
return True
class GroupClient(object):
_MAX_MSG_SIZE = 500
def __init__(self, address, port):
self._address = address
self._port = port
self._send_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
# Make the socket multicast-aware, and set TTL.
self._send_sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 20) # Change TTL (=20) to suit
def send_msg(self, data):
self._send_sock.sendto(data, (self._address, self._port))
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