bin/tiny_socket.py

   1 ##############################################################################
   2 #
   3 # Copyright (c) 2004-2008 Tiny SPRL (http://tiny.be) All Rights Reserved.
   4 #
   5 # $Id$
   6 #
   7 # WARNING: This program as such is intended to be used by professional
   8 # programmers who take the whole responsability of assessing all potential
   9 # consequences resulting from its eventual inadequacies and bugs
  10 # End users who are looking for a ready-to-use solution with commercial
  11 # garantees and support are strongly adviced to contract a Free Software
  12 # Service Company
  13 #
  14 # This program is Free Software; you can redistribute it and/or
  15 # modify it under the terms of the GNU General Public License
  16 # as published by the Free Software Foundation; either version 2
  17 # of the License, or (at your option) any later version.
  18 #
  19 # This program is distributed in the hope that it will be useful,
  20 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 # GNU General Public License for more details.
  23 #
  24 # You should have received a copy of the GNU General Public License
  25 # along with this program; if not, write to the Free Software
  26 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  27 ###############################################################################
  28 import socket
  29 import cPickle
  30 import marshal
  31
  32 DNS_CACHE = {}
  33
  34 class Myexception(Exception):
  35         def __init__(self, faultCode, faultString):
  36                 self.faultCode = faultCode
  37                 self.faultString = faultString
  38                 self.args = (faultCode, faultString)
  39
  40 class mysocket:
  41         def __init__(self, sock=None):
  42                 if sock is None:
  43                         self.sock = socket.socket(
  44                         socket.AF_INET, socket.SOCK_STREAM)
  45                 else:
  46                         self.sock = sock
  47                 self.sock.settimeout(120)
  48         def connect(self, host, port=False):
  49                 if not port:
  50                         protocol, buf = host.split('//')
  51                         host, port = buf.split(':')
  52                 if host in DNS_CACHE:
  53                         host = DNS_CACHE[host]
  54                 self.sock.connect((host, int(port)))
  55                 DNS_CACHE[host], port = self.sock.getpeername()
  56         def disconnect(self):
  57                 self.sock.shutdown(socket.SHUT_RDWR)
  58                 self.sock.close()
  59         def mysend(self, msg, exception=False, traceback=None):
  60                 msg = cPickle.dumps([msg,traceback])
  61                 size = len(msg)
  62                 self.sock.send('%8d' % size)
  63                 self.sock.send(exception and "1" or "0")
  64                 totalsent = 0
  65                 while totalsent < size:
  66                         sent = self.sock.send(msg[totalsent:])
  67                         if sent == 0:
  68                                 raise RuntimeError, "socket connection broken"
  69                         totalsent = totalsent + sent
  70         def myreceive(self):
  71                 buf=''
  72                 while len(buf) < 8:
  73                         chunk = self.sock.recv(8 - len(buf))
  74                         if chunk == '':
  75                                 raise RuntimeError, "socket connection broken"
  76                         buf += chunk
  77                 size = int(buf)
  78                 buf = self.sock.recv(1)
  79                 if buf != "0":
  80                         exception = buf
  81                 else:
  82                         exception = False
  83                 msg = ''
  84                 while len(msg) < size:
  85                         chunk = self.sock.recv(size-len(msg))
  86                         if chunk == '':
  87                                 raise RuntimeError, "socket connection broken"
  88                         msg = msg + chunk
  89                 res = cPickle.loads(msg)
  90                 if isinstance(res[0],Exception):
  91                         if exception:
  92                                 raise Myexception(str(res[0]), str(res[1]))
  93                         raise res[0]
  94                 else:
  95                         return res[0]