[英]Python Queue.Queue wont work in threaded TCP Stream Handler
我正在尝试创建一个线程化的 tcp 流处理程序类线程和主线程交谈,但是 Queue.Queue 也没有做我需要的事情,服务器从另一个程序接收数据,我只想将它传递到主线程这里处理的线程是我到目前为止的代码:
编辑:使用建议的答案更新,队列仍然什么都不做,我什至无法在我执行 self.queue.put(info) 之后让任何打印命令工作,就像整个事情都死了一样。 但是它没有给我任何错误,但是在我将信息放入队列后,数据进入的流处理程序/线程死亡。
class ThreadedTCPStreamHandler(SocketServer.StreamRequestHandler):
def __init__(self, request, client_address, server):
SocketServer.StreamRequestHandler.__init__(self, request, client_address, server)
self.queue = self.server.queue
def handle(self):
while True:
try:
self.data = self.rfile.readline().strip()
cur_thread = threading.current_thread()
command = self.data[0:2]
if command == "nr":
info = self.data[2:]
t1 = info.split("|")
title = t1[0]
self.queue.put(info)
class ThreadedTCPServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
def __init__(self, server_address, RequestHandlerClass, bind_and_activate=True, queue=None):
self.queue = queue
SocketServer.TCPServer.__init__(self, server_address, RequestHandlerClass, bind_and_activate=bind_and_activate)
在主线程类中,我有:
q = Queue.Queue()
server = ThreadedTCPServer((HOST, PORT), ThreadedTCPStreamHandler, queue=q)
ip, port = server.server_address
server_thread = threading.Thread(target=server.serve_forever)
server_thread.daemon = True
server_thread.start()
while True:
try:
item = q.get()
print item
q.task_done()
q.join()
except KeyboardInterrupt:
server.shutdown()
sys.exit(0)
但是没有打印出来,它不会传递数据,我知道我做错了什么,我只是不知道它是什么。 如果有人有任何可以帮助的见解,我将不胜感激,谢谢。
流处理程序和主线程都需要使用相同的Queue
对象才能工作。 您正在每个地方创建单独的队列对象。 如果客户端和服务器代码在同一个文件中,或者使用queue
作为全局变量,或者执行以下操作:
class ThreadedTCPStreamServer(ThreadingMixin, TCPServer):
def __init__(self, server_address, RequestHandlerClass, bind_and_activate=True,
queue=None):
self.queue = queue
TCPServer.__init__(self, server_address, RequestHandlerClass,
bind_and_activate=bind_and_activate)
class ThreadedTCPStreamHandler(SocketServer.StreamRequestHandler):
def __init__(self, request, client_address, server):
self.queue = server.queue
StreamRequestHandler.__init__(self, request, client_address, server)
def handle(self):
while True:
self.data = self.rfile.readline().strip()
if not self.data:
break
cur_thread = threading.current_thread()
command = self.data[0:2]
if command == "nr":
info = self.data[2:]
t1 = info.split("|")
title = t1[0]
self.queue.put(info)
self.finish()
q = Queue.Queue()
server = ThreadedTCPServer((HOST, PORT), ThreadedTCPStreamHandler, queue=q)
ip, port = server.server_address
server_thread = threading.Thread(target=server.serve_forever)
server_thread.daemon = True
server_thread.start()
while True:
try:
item = q.get()
print item
q.task_done()
q.join()
except KeyboardInterrupt:
server.shutdown()
sys.exit(0)
发现我必须从接受的答案中调整一些东西。 这个例子有效(至少在 python2.7 中)。
启动服务器后,您可以通过使用 netcat 或类似工具重复发送来进行测试:
echo "nrtest" | nc -4 127.0.0.1 50514
也可以在 linux 上使用logger
命令发送,但是处理程序必须查找其他字符串(此示例检查该行以“nr”开头,作为 pr OP 请求)。
logger -T -n 127.0.0.1 -P 50514 "Test message"
结果如下 - 为可读性分成几个部分。
进口:
"""
Based on https://stackoverflow.com/a/25246157/2045924
"""
import threading
import Queue
import sys
import SocketServer
from SocketServer import StreamRequestHandler
from SocketServer import TCPServer
from SocketServer import ThreadingMixIn
向 TCPServer 添加队列:
class ThreadedTCPStreamServer(ThreadingMixIn, TCPServer):
"""ThreadedTCPStreamServer."""
def __init__(self, server_address, RequestHandlerClass, bind_and_activate=True,
queue=None):
self.queue = queue
TCPServer.__init__(self, server_address, RequestHandlerClass,
bind_and_activate=bind_and_activate)
将队列添加到 StreamRequestHandler,告诉“处理”要做什么,让“完成”通过。
class ThreadedTCPStreamHandler(SocketServer.StreamRequestHandler):
"""ThreadedTCPStreamHandler."""
def __init__(self, request, client_address, server):
self.queue = server.queue
StreamRequestHandler.__init__(self, request, client_address, server)
def handle(self):
while True:
self.data = self.rfile.readline().strip()
if not self.data:
break
__cur_thread = threading.current_thread()
self.finish()
command = self.data[0:2]
if command == "nr":
info = self.data[2:]
__t1 = info.split("|")
__title = __t1[0]
self.queue.put(info)
self.finish()
def finish(self):
pass
定义全局变量并开始。
HOST = '127.0.0.1'
PORT = 50514
# QUEUE must be defined _outside_.
QUEUE = Queue.Queue()
QTIMEOUT = 1
# Setup instance of my own ThreadedTCPStreamServer with my own ThreadedTCPStreamHandler.
SERVER = ThreadedTCPStreamServer((HOST, PORT), ThreadedTCPStreamHandler, queue=QUEUE)
__IP, __PORT = SERVER.server_address
# Start the server
SERVER_THREAD = threading.Thread(target=SERVER.serve_forever)
SERVER_THREAD.daemon = True
SERVER_THREAD.start()
while True:
try:
#ITEM = QUEUE.get(block=True, timeout=QTIMEOUT)
ITEM = QUEUE.get()
print 'qsize({s}): {i}'.format(s=QUEUE.qsize(), i=ITEM)
QUEUE.task_done()
QUEUE.join()
except KeyboardInterrupt:
SERVER.shutdown()
sys.exit(0)
#except Queue.Empty:
# print 'Got Queue.Empty after waiting for {t}. Continuing...'.format(t=QTIMEOUT)
# continue
现在开始使用nc
或类似工具发送一些东西。
要结束程序,请按<ctrl>+C
。
如果您发送数据包, KeyboardInterrupt
将“工作”。
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