我有一个小型客户端应用程序，需要维护与服务器的持久套接字连接。
连接建立似乎工作正常。当服务器关闭我能够检测到的套接字时。
但是当客户端以太网电缆被拔掉时。当我尝试在袜子中发送或接收数据时，它永远不会抛出异常。
当我尝试发送时，我获得发送数据成功，当我尝试接收时，我得到接收超时
我班上缺少什么。请指导
注意：套接字几乎需要14分钟才能找到断开连接
保持活动数据：
echo 30 > /proc/sys/net/ipv4/tcp_keepalive_intvl
echo 3 > /proc/sys/net/ipv4/tcp_keepalive_probes
echo 30 > /proc/sys/net/ipv4/tcp_keepalive_time
代码实现：
import logFormat as log
import socket
import traceback
import sys
import select
import time
import messageId as messasgeId # Name convention to be decided Many DB access done through this class
def synchronized(L):
def lock_around(f):
def locked(*a, **k):
with L:
return f(*a, **k)
locked.__name__ = f.__name__
locked.__doc__ = f.__doc__
return locked
return lock_around
class socketHandler(object):
__single = None # the one, true Singleton
def __new__(classtype, *args, **kwargs):
if classtype != type(classtype.__single):
classtype.__single = object.__new__(classtype, *args, **kwargs)
return classtype.__single
def __init__(self, name=None):
self.name = name
self.throttleCount = 100
self.loggerCount = 0
self.timeoutDefault=0.2
def socketSend(self, data):
try:
self.sock.send(data)
log.debugLog("Socket data send complete", True)
return True
except:
log.debugLog("Socket data send with error/timeout", True)
raise
def recieveProtoBufHeader(self, headerLength, timeout=10):
try:
self.sock.settimeout(timeout)
expHeaderBytes = ord(headerLength)
log.debugLog("Expected socket data length: %s with timeout: %s" % (expHeaderBytes, timeout), True)
HeaderData = self.sock.recv(expHeaderBytes)
log.debugLog("Data received in socket: %s" % HeaderData, True)
self.sock.settimeout(self.timeoutDefault)
return HeaderData
except:
log.debugLog("recieveProtoBufHeader with error/timeout", True)
raise
def recieveProtoBufData(self, dataSize, timeout=0.1):
try:
log.debugLog("Expected socket data length: %s with timeout: %s" % (dataSize, timeout), True)
self.sock.settimeout(timeout)
dataBuffer = self.sock.recv(dataSize)
log.debugLog("Data received in socket: %s" % dataBuffer, True)
self.sock.settimeout(self.timeoutDefault)
return dataBuffer
except:
log.debugLog("recieveProtoBufData with error/timeout", True)
raise
def recieveData(self, dataSize, timeout=0.1):
try:
self.sock.settimeout(timeout)
dataBuffer = self.sock.recv(1)
if len(dataBuffer) == dataSize:
log.debugLog("Data received in socket: %s" % dataBuffer.encode('hex'), True)
log.debugLog("Data received length: %s" % len(dataBuffer), True)
else:
self.sock.close()
log.debugLog("Server side socket closed raising socket error", True)
raise socket.error, "Socket error raised"
self.sock.settimeout(self.timeoutDefault)
return dataBuffer
except socket.timeout:
raise # Can add log foo socket timeout
except:
log.debugLog("Unknown exception occurred so closing socket ", True)
self.sock.close()
raise
def recieveDataCheck(self):
try:
self.sock.settimeout(0.2)
dataBuffer = self.sock.recv(1)
if len(dataBuffer) == 1:
log.debugLog("Data received in socket: %s" % dataBuffer.encode('hex'), True)
log.debugLog("Data received length: %s" % len(dataBuffer), True)
else:
self.sock.close()
log.debugLog("Server side socket closed raising socket error", True)
raise socket.error, "Socket error raised"
return dataBuffer
except socket.timeout:
raise # Can add log foo socket timeout
except:
log.debugLog("Unknown exception occurred so closing socket ", True)
self.sock.close()
raise
def closeSocket(self):
try:
self.sock.close()
self.sock = None
return True
except:
log.debugLog("Close socket with error", True)
raise
def recieveCheck(self):
try:
ready = select.select([self.sock], [], [], 0.2)
print ready
if len(ready[0]) == 0:
return True
else:
return False
except:
raise
def connectSocket(self, retryCount=5):
try:
self.loggerCount+=1
if self.loggerCount % self.throttleCount == 0:
throttleLog=True
else:
throttleLog=False
#host = "192.168.10.134"
host = messasgeId.getSwitchIP()
# host = "localhost"
#port = int(8001)
port = int(messasgeId.getSwitchPort())
log.debugLog("connection with switch server ip: %s port: %s on progress" % (host, port), True)
while retryCount:
self.sock = None
self.sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.sock.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
#self.sock.bind(host,port)
self.sock.settimeout(0.1)
try:
self.sock.connect((host, port))
#assert(self.recieveCheck())
log.debugLog("Socket connection established successfully", True)
self.loggerCount = 0
return True
except:
log.debugLog("Socket Connection Retry Count Remaining Progress(%s)" % retryCount, True)
time.sleep(5)
retryCount -= 1
if retryCount == 0:
return False
return False
except:
log.debugLog("Unexpected error in socket connection", True)
raise