00000036 " ˆl–ßi~”d e¶¥8 ¸Û×ú˜´o¿ ƒh¹ÂÁ 1 "ˆl–ßi~”d e¶¥8 ¸Ë·â˜´oÀ ƒh¹ÃÂ000000aa #ˆl–ßi~” Ji?u2 \¸®õ1hßÁ „&ÿÄÃ?÷"""RPC Implemention, originally written for the Python Idle IDE For security reasons, GvR requested that Idle's Python execution server process connect to the Idle process, which listens for the connection. Since Idle has only one client per server, this was not a limitation. +---------------------------------+ +-------------+ | SocketServer.BaseRequestHandler | | SocketIO | +---------------------------------+ +-------------+ ^ | register() | | | unregister()| | +-------------+ | ^ ^ | | | | + -------------------+ | | | | +-------------------------+ +-----------------+ | RPCHandler | | RPCClient | | [attribute of RPCServer]| | | +-------------------------+ +-----------------+ The RPCServer handler class is expected to provide register/unregister methods. RPCHandler inherits the mix-in class SocketIO, which provides these methods. See the Idle run.main() docstring for further information on how this was accomplished in Idle. """ import sys import os import socket import select import SocketServer import struct import cPickle as pickle import threading import Queue import traceback import copy_reg import types import marshal def unpickle_code(ms): co = marshal.loads(ms) assert isinstance(co, types.CodeType) return co def pickle_code(co): assert isinstance(co, types.CodeType) ms = marshal.dumps(co) return unpickle_code, (ms,) # XXX KBK 24Aug02 function pickling capability not used in Idle # def unpickle_function(ms): # return ms # def pickle_function(fn): # assert isinstance(fn, type.FunctionType) # return repr(fn) copy_reg.pickle(types.CodeType, pickle_code, unpickle_code) # copy_reg.pickle(types.FunctionType, pickle_function, unpickle_function) BUFSIZE = 8*1024 LOCALHOST = '127.0.0.1' class RPCServer(SocketServer.TCPServer): def __init__(self, addr, handlerclass=None): if handlerclass is None: handlerclass = RPCHandler SocketServer.TCPServer.__init__(self, addr, handlerclass) def server_bind(self): "Override TCPServer method, no bind() phase for connecting entity" pass def server_activate(self): """Override TCPServer method, connect() instead of listen() Due to the reversed connection, self.server_address is actually the address of the Idle Client to which we are connecting. """ self.socket.connect(self.server_address) def get_request(self): "Override TCPServer method, return already connected socket" return self.socket, self.server_address def handle_error(self, request, client_address): """Override TCPServer method Error message goes to __stderr__. No error message if exiting normally or socket raised EOF. Other exceptions not handled in server code will cause os._exit. """ try: raise except SystemExit: raise except: erf = sys.__stderr__ print>>erf, '\n' + '-'*40 print>>erf, 'Unhandled server exception!' print>>erf, 'Thread: %s' % threading.currentThread().getName() print>>erf, 'Client Address: ', client_address print>>erf, 'Request: ', repr(request) traceback.print_exc(file=erf) print>>erf, '\n*** Unrecoverable, server exiting!' print>>erf, '-'*40 os._exit(0) #----------------- end class RPCServer -------------------- objecttable = {} request_queue = Queue.Queue(0) response_queue = Queue.Queue(0) class SocketIO(object)