/usr/lib/python2.7/dist-packages/Pyro4/socketserver/threadpoolserver.py is in python2-pyro4 4.63-1.
This file is owned by root:root, with mode 0o644.
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Socket server based on a worker thread pool. Doesn't use select.
Uses a single worker thread per client connection.
Pyro - Python Remote Objects. Copyright by Irmen de Jong (irmen@razorvine.net).
"""
from __future__ import print_function
import socket
import logging
import sys
import time
import threading
import os
from Pyro4 import socketutil, errors, util
from Pyro4.configuration import config
from .threadpool import Pool, NoFreeWorkersError
log = logging.getLogger("Pyro4.threadpoolserver")
_client_disconnect_lock = threading.Lock()
class ClientConnectionJob(object):
"""
Takes care of a single client connection and all requests
that may arrive during its life span.
"""
def __init__(self, clientSocket, clientAddr, daemon):
self.csock = socketutil.SocketConnection(clientSocket)
self.caddr = clientAddr
self.daemon = daemon
def __call__(self):
if self.handleConnection():
try:
while True:
try:
self.daemon.handleRequest(self.csock)
except (socket.error, errors.ConnectionClosedError):
# client went away.
log.debug("disconnected %s", self.caddr)
break
except errors.SecurityError:
log.debug("security error on client %s", self.caddr)
break
except errors.TimeoutError as x:
# for timeout errors we're not really interested in detailed traceback info
log.warning("error during handleRequest: %s" % x)
break
except:
# other errors log a warning, break this loop and close the client connection
ex_t, ex_v, ex_tb = sys.exc_info()
tb = util.formatTraceback(ex_t, ex_v, ex_tb)
msg = "error during handleRequest: %s; %s" % (ex_v, "".join(tb))
log.warning(msg)
break
finally:
with _client_disconnect_lock:
try:
self.daemon._clientDisconnect(self.csock)
except Exception as x:
log.warning("Error in clientDisconnect: " + str(x))
self.csock.close()
def handleConnection(self):
# connection handshake
try:
if self.daemon._handshake(self.csock):
return True
self.csock.close()
except:
ex_t, ex_v, ex_tb = sys.exc_info()
tb = util.formatTraceback(ex_t, ex_v, ex_tb)
log.warning("error during connect/handshake: %s; %s", ex_v, "\n".join(tb))
self.csock.close()
return False
def denyConnection(self, reason):
log.warning("client connection was denied: " + reason)
# return failed handshake
self.daemon._handshake(self.csock, denied_reason=reason)
self.csock.close()
class Housekeeper(threading.Thread):
def __init__(self, daemon):
super(Housekeeper, self).__init__(name="housekeeper")
self.pyroDaemon = daemon
self.stop = threading.Event()
self.daemon = True
self.waittime = min(config.POLLTIMEOUT or 0, max(config.COMMTIMEOUT or 0, 5))
def run(self):
while True:
if self.stop.wait(self.waittime):
break
self.pyroDaemon._housekeeping()
class SocketServer_Threadpool(object):
"""transport server for socket connections, worker thread pool version."""
def __init__(self):
self.daemon = self.sock = self._socketaddr = self.locationStr = self.pool = None
self.shutting_down = False
self.housekeeper = None
def init(self, daemon, host, port, unixsocket=None):
log.info("starting thread pool socketserver")
self.daemon = daemon
self.sock = None
bind_location = unixsocket if unixsocket else (host, port)
if config.SSL:
sslContext = socketutil.getSSLcontext(servercert=config.SSL_SERVERCERT,
serverkey=config.SSL_SERVERKEY,
keypassword=config.SSL_SERVERKEYPASSWD,
cacerts=config.SSL_CACERTS)
log.info("using SSL, cert=%s key=%s cacerts=%s", config.SSL_SERVERCERT, config.SSL_SERVERKEY, config.SSL_CACERTS)
else:
sslContext = None
log.info("not using SSL")
self.sock = socketutil.createSocket(bind=bind_location,
reuseaddr=config.SOCK_REUSE,
timeout=config.COMMTIMEOUT,
noinherit=True,
nodelay=config.SOCK_NODELAY,
sslContext=sslContext)
self._socketaddr = self.sock.getsockname()
if not unixsocket and self._socketaddr[0].startswith("127."):
if host is None or host.lower() != "localhost" and not host.startswith("127."):
log.warning("weird DNS setup: %s resolves to localhost (127.x.x.x)", host)
if unixsocket:
self.locationStr = "./u:" + unixsocket
else:
host = host or self._socketaddr[0]
port = port or self._socketaddr[1]
if ":" in host: # ipv6
self.locationStr = "[%s]:%d" % (host, port)
else:
self.locationStr = "%s:%d" % (host, port)
self.pool = Pool()
self.housekeeper = Housekeeper(daemon)
self.housekeeper.start()
def __del__(self):
if self.sock is not None:
self.sock.close()
self.sock = None
if self.pool is not None:
self.pool.close()
self.pool = None
if self.housekeeper:
self.housekeeper.stop.set()
self.housekeeper.join()
self.housekeeper = None
def __repr__(self):
return "<%s on %s; %d workers>" % (self.__class__.__name__, self.locationStr, self.pool.num_workers())
def loop(self, loopCondition=lambda: True):
log.debug("threadpool server requestloop")
while (self.sock is not None) and not self.shutting_down and loopCondition():
try:
self.events([self.sock])
except (socket.error, OSError) as x:
if not loopCondition():
# swallow the socket error if loop terminates anyway
# this can occur if we are asked to shutdown, socket can be invalid then
break
# socket errors may not lead to a server abort, so we log it and continue
err = getattr(x, "errno", x.args[0])
log.warning("socket error '%s' with errno=%d, shouldn't happen", x, err)
continue
except KeyboardInterrupt:
log.debug("stopping on break signal")
break
def combine_loop(self, server):
raise TypeError("You can't use the loop combiner on the threadpool server type")
def events(self, eventsockets):
"""used for external event loops: handle events that occur on one of the sockets of this server"""
# we only react on events on our own server socket.
# all other (client) sockets are owned by their individual threads.
assert self.sock in eventsockets
try:
csock, caddr = self.sock.accept()
if self.shutting_down:
csock.close()
return
if hasattr(csock, "getpeercert"):
log.debug("connected %s - SSL", caddr)
else:
log.debug("connected %s - unencrypted", caddr)
if config.COMMTIMEOUT:
csock.settimeout(config.COMMTIMEOUT)
job = ClientConnectionJob(csock, caddr, self.daemon)
try:
self.pool.process(job)
except NoFreeWorkersError:
job.denyConnection("no free workers, increase server threadpool size")
except socket.timeout:
pass # just continue the loop on a timeout on accept
def shutdown(self):
self.shutting_down = True
self.wakeup()
time.sleep(0.05)
self.close()
self.sock = None
def close(self):
if self.housekeeper:
self.housekeeper.stop.set()
self.housekeeper.join()
self.housekeeper = None
if self.sock:
sockname = None
try:
sockname = self.sock.getsockname()
except (socket.error, OSError):
pass
try:
self.sock.close()
if type(sockname) is str:
# it was a Unix domain socket, remove it from the filesystem
if os.path.exists(sockname):
os.remove(sockname)
except Exception:
pass
self.sock = None
self.pool.close()
@property
def sockets(self):
# the server socket is all we care about, all client sockets are running in their own threads
return [self.sock]
@property
def selector(self):
raise TypeError("threadpool server doesn't have multiplexing selector")
def wakeup(self):
socketutil.interruptSocket(self._socketaddr)
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