python worker python worker timeout

有点乱后期在做整理

1.在非阻塞套接字没有数据可用的情况下，recv的会抛出异常socket.error和异常的价值将要么EAGAIN或者EWOULDBLOCK的错误号。例如：

import sys
import socket
import fcntl, os
import errno
from time import sleep
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1',9999))
fcntl.fcntl(s, fcntl.F_SETFL, os.O_NONBLOCK)
while True:
 try:
  msg = s.recv(4096)
 except socket.error, e:
  err = e.args[0]
  if err == errno.EAGAIN or err == errno.EWOULDBLOCK:
   sleep(1)
   print 'No data available'
   continue
  else:
   # a "real" error occurred
   print e
   sys.exit(1)
 else:
  # got a message, do something :)

这种情况在该情况下，有一点不同，你已经通过了出去启用非阻塞行为s.settimeout(n)。在这种情况下，socket.error是史迪威提出，但在一列的情况下，异常的值始终设置为“出”的字符串。因此 CodeGo.net，要处理这种情况，你可以这样做：

import sys
import socket
from time import sleep
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1',9999))
s.settimeout(2)
while True:
 try:
  msg = s.recv(4096)
 except socket.timeout, e:
  err = e.args[0]
  # this next if/else is a bit redundant, but illustrates how the
  # timeout exception is setup
  if err == 'timed out':
   sleep(1)
   print 'recv timed out, retry later'
   continue
  else:
   print e
   sys.exit(1)
 except socket.error, e:
  # Something else happened, handle error, exit, etc.
  print e
  sys.exit(1)
 else:
  if len(msg) == 0:
   print 'orderly shutdown on server end'
   sys.exit(0)
  else:
   # got a message do something :)


recv()
recv
select
recv

def listenToSockets(self):
 while True:
  changed_sockets = self.currentSockets
  ready_to_read, ready_to_write, in_error = select.select(changed_sockets, [], [], 0.1)
  for s in ready_to_read:
   if s == self.serverSocket:
    self.acceptNewConnection(s)
   else:
    self.readDataFromSocket(s)

和接收数据的函数：

def readDataFromSocket(self, socket):
 data = ''
 buffer = ''
 try:
  while True:
   data = socket.recv(4096)
   if not data: 
    break
   buffer += data
 except error, (errorCode,message): 
  # error 10035 is no data available, it is non-fatal
  if errorCode != 10035:
   print 'socket.error - ('+str(errorCode)+') ' + message

 if data:
  print 'received '+ buffer
 else:
  print 'disconnected'