openerp/service/netrpc_server.py

   1 # -*- coding: utf-8 -*-
   2
   3 #
   4 # Copyright P. Christeas <p_christ@hol.gr> 2008,2009
   5 #    Copyright (C) 2004-2009 Tiny SPRL (<http://tiny.be>).
   6 #
   7 #    This program is free software: you can redistribute it and/or modify
   8 #    it under the terms of the GNU Affero General Public License as
   9 #    published by the Free Software Foundation, either version 3 of the
  10 #    License, or (at your option) any later version.
  11 #
  12 #    This program is distributed in the hope that it will be useful,
  13 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 #    GNU Affero General Public License for more details.
  16 #
  17 #    You should have received a copy of the GNU Affero General Public License
  18 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 #
  20 ##############################################################################
  21
  22 #.apidoc title: NET-RPC Server
  23
  24 """ This file contains instance of the net-rpc server
  25
  26
  27 """
  28 import logging
  29 import select
  30 import socket
  31 import sys
  32 import threading
  33 import traceback
  34 import openerp
  35 import openerp.netsvc as netsvc
  36 import openerp.tiny_socket as tiny_socket
  37 import openerp.tools as tools
  38
  39 _logger = logging.getLogger(__name__)
  40
  41 class TinySocketClientThread(threading.Thread):
  42     def __init__(self, sock, threads):
  43         spn = sock and sock.getpeername()
  44         spn = 'netrpc-client-%s:%s' % spn[0:2]
  45         threading.Thread.__init__(self, name=spn)
  46         self.sock = sock
  47         # Only at the server side, use a big timeout: close the
  48         # clients connection when they're idle for 20min.
  49         self.sock.settimeout(1200)
  50         self.threads = threads
  51
  52     def run(self):
  53         self.running = True
  54         try:
  55             ts = tiny_socket.mysocket(self.sock)
  56         except Exception:
  57             self.threads.remove(self)
  58             self.running = False
  59             return False
  60
  61         while self.running:
  62             try:
  63                 msg = ts.myreceive()
  64                 result = netsvc.dispatch_rpc(msg[0], msg[1], msg[2:])
  65                 ts.mysend(result)
  66             except socket.timeout:
  67                 #terminate this channel because other endpoint is gone
  68                 break
  69             except Exception, e:
  70                 try:
  71                     valid_exception = Exception(netrpc_handle_exception_legacy(e))
  72                     valid_traceback = getattr(e, 'traceback', sys.exc_info())
  73                     formatted_traceback = "".join(traceback.format_exception(*valid_traceback))
  74                     _logger.debug("netrpc: communication-level exception", exc_info=True)
  75                     ts.mysend(valid_exception, exception=True, traceback=formatted_traceback)
  76                     break
  77                 except Exception, ex:
  78                     #terminate this channel if we can't properly send back the error
  79                     _logger.exception("netrpc: cannot deliver exception message to client")
  80                     break
  81
  82         netsvc.close_socket(self.sock)
  83         self.sock = None
  84         self.threads.remove(self)
  85         self.running = False
  86         return True
  87
  88     def stop(self):
  89         self.running = False
  90
  91 def netrpc_handle_exception_legacy(e):
  92     if isinstance(e, openerp.osv.osv.except_osv):
  93         return 'warning -- ' + e.name + '\n\n' + e.value
  94     if isinstance(e, openerp.exceptions.Warning):
  95         return 'warning -- Warning\n\n' + str(e)
  96     if isinstance(e, openerp.exceptions.AccessError):
  97         return 'warning -- AccessError\n\n' + str(e)
  98     if isinstance(e, openerp.exceptions.AccessDenied):
  99         return 'AccessDenied ' + str(e)
 100     return openerp.tools.exception_to_unicode(e)
 101
 102 class TinySocketServerThread(threading.Thread,netsvc.Server):
 103     def __init__(self, interface, port, secure=False):
 104         threading.Thread.__init__(self, name="NetRPCDaemon-%d"%port)
 105         netsvc.Server.__init__(self)
 106         self.__port = port
 107         self.__interface = interface
 108         self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 109         self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
 110         self.socket.bind((self.__interface, self.__port))
 111         self.socket.listen(5)
 112         self.threads = []
 113         _logger.info("starting NET-RPC service on %s:%s", interface or '0.0.0.0', port)
 114
 115     def run(self):
 116         try:
 117             self.running = True
 118             while self.running:
 119                 fd_sets = select.select([self.socket], [], [], self._busywait_timeout)
 120                 if not fd_sets[0]:
 121                     continue
 122                 (clientsocket, address) = self.socket.accept()
 123                 ct = TinySocketClientThread(clientsocket, self.threads)
 124                 clientsocket = None
 125                 self.threads.append(ct)
 126                 ct.start()
 127                 lt = len(self.threads)
 128                 if (lt > 10) and (lt % 10 == 0):
 129                     # Not many threads should be serving at the same time, so log
 130                     # their abuse.
 131                     _logger.debug("Netrpc: %d threads", len(self.threads))
 132             self.socket.close()
 133         except Exception, e:
 134             _logger.warning("Netrpc: closing because of exception %s" % str(e))
 135             self.socket.close()
 136             return False
 137
 138     def stop(self):
 139         self.running = False
 140         for t in self.threads:
 141             t.stop()
 142         self._close_socket()
 143
 144     def stats(self):
 145         res = "Net-RPC: " + ( (self.running and "running") or  "stopped")
 146         i = 0
 147         for t in self.threads:
 148             i += 1
 149             res += "\nNet-RPC #%d: %s " % (i, t.name)
 150             if t.isAlive():
 151                 res += "running"
 152             else:
 153                 res += "finished"
 154             if t.sock:
 155                 res += ", socket"
 156         return res
 157
 158 netrpcd = None
 159
 160 def init_servers():
 161     global netrpcd
 162     if tools.config.get('netrpc', False):
 163         netrpcd = TinySocketServerThread(
 164             tools.config.get('netrpc_interface', ''),
 165             int(tools.config.get('netrpc_port', 8070)))
 166
 167 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: