Staging
v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 1da43e5e916949c8e849e656d9d05fa4b9d6836c authored by Benjamin Peterson on 26 June 2009, 13:21:52 UTC
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
rearrange the sections of the README, so they'll hopefully be more in the order people will interested in
Tip revision: 1da43e5
server.py
"""RPC Server module."""
import sys
import socket
import pickle
from fnmatch import fnmatch
from reprlib import repr
# Default verbosity (0 = silent, 1 = print connections, 2 = print requests too)
VERBOSE = 1
class Server:
"""RPC Server class. Derive a class to implement a particular service."""
def __init__(self, address, verbose = VERBOSE):
if type(address) == type(0):
address = ('', address)
self._address = address
self._verbose = verbose
self._socket = None
self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self._socket.bind(address)
self._socket.listen(1)
self._listening = 1
def _setverbose(self, verbose):
self._verbose = verbose
def __del__(self):
self._close()
def _close(self):
self._listening = 0
if self._socket:
self._socket.close()
self._socket = None
def _serverloop(self):
while self._listening:
self._serve()
def _serve(self):
if self._verbose: print("Wait for connection ...")
conn, address = self._socket.accept()
if self._verbose: print("Accepted connection from %s" % repr(address))
if not self._verify(conn, address):
print("*** Connection from %s refused" % repr(address))
conn.close()
return
rf = conn.makefile('r')
wf = conn.makefile('w')
ok = 1
while ok:
wf.flush()
if self._verbose > 1: print("Wait for next request ...")
ok = self._dorequest(rf, wf)
_valid = ['192.16.201.*', '192.16.197.*', '132.151.1.*', '129.6.64.*']
def _verify(self, conn, address):
host, port = address
for pat in self._valid:
if fnmatch(host, pat): return 1
return 0
def _dorequest(self, rf, wf):
rp = pickle.Unpickler(rf)
try:
request = rp.load()
except EOFError:
return 0
if self._verbose > 1: print("Got request: %s" % repr(request))
try:
methodname, args, id = request
if '.' in methodname:
reply = (None, self._special(methodname, args), id)
elif methodname[0] == '_':
raise NameError("illegal method name %s" % repr(methodname))
else:
method = getattr(self, methodname)
reply = (None, method(*args), id)
except:
reply = (sys.exc_info()[:2], id)
if id < 0 and reply[:2] == (None, None):
if self._verbose > 1: print("Suppress reply")
return 1
if self._verbose > 1: print("Send reply: %s" % repr(reply))
wp = pickle.Pickler(wf)
wp.dump(reply)
return 1
def _special(self, methodname, args):
if methodname == '.methods':
if not hasattr(self, '_methods'):
self._methods = tuple(self._listmethods())
return self._methods
raise NameError("unrecognized special method name %s" % repr(methodname))
def _listmethods(self, cl=None):
if not cl: cl = self.__class__
names = sorted([x for x in cl.__dict__.keys() if x[0] != '_'])
for base in cl.__bases__:
basenames = self._listmethods(base)
basenames = list(filter(lambda x, names=names: x not in names, basenames))
names[len(names):] = basenames
return names
from security import Security
class SecureServer(Server, Security):
def __init__(self, *args):
Server.__init__(self, *args)
Security.__init__(self)
def _verify(self, conn, address):
import string
challenge = self._generate_challenge()
conn.send("%d\n" % challenge)
response = ""
while "\n" not in response and len(response) < 100:
data = conn.recv(100)
if not data:
break
response = response + data
try:
response = string.atol(string.strip(response))
except string.atol_error:
if self._verbose > 0:
print("Invalid response syntax", repr(response))
return 0
if not self._compare_challenge_response(challenge, response):
if self._verbose > 0:
print("Invalid response value", repr(response))
return 0
if self._verbose > 1:
print("Response matches challenge. Go ahead!")
return 1