我试图了解我的代码的行为。我正在使用 zeromq 创建一个发送“ping”并等待“pong”响应的服务器。我看到的是，当我发送 ping 时，只有一个客户端收到它。当我第一次运行此代码并发送“ping”时，我收到：
pong: A
当我再次运行它时，我得到
pong: B
这是为什么？我想发送一个“ping”并接收两个 pong。
这是代码：
from threading import Thread
import zmq
class zmqdealer(object):
def __init__(self, port):
context = zmq.Context()
self.sock = context.socket(zmq.DEALER)
#self.sock.setsockopt(zmq.RCVTIMEO, 1000)
self.sock.bind("tcp://*:%s" % port)
thread = Thread(target=lambda: self.poll())
thread.daemon = True
thread.start()
def poll(self):
while True:
reply = self.sock.recv()
if reply != "":
print(reply)
def ping(self):
self.sock.send_multipart(['', 'ping'])
class zmqrep(object):
def __init__(self, ident,host, port):
context = zmq.Context()
self.sock = context.socket(zmq.REP)
self.sock.connect("tcp://%s:%s" % (host, port))
self.ident = ident
thread = Thread(target=lambda: self.pong())
thread.daemon = True
thread.start()
def pong(self):
while True:
request = self.sock.recv()
if request == "ping":
msg = "pong: %s" % self.ident
self.sock.send(msg)
if __name__ == "__main__":
port = 11112
host = "localhost"
server = zmqdealer(port)
client1 = zmqrep('A',host,port)
client2 = zmqrep('B',host,port)
answer = raw_input('press <ENTER> to exit or type \'ping\' to get a pong\n')
while True:
if answer == "":
break
if answer == "ping":
server.ping()
answer = raw_input()
编辑
我找到了一种方法来完成这项工作。我真的希望有另一种方法，因为我真的很讨厌这个！所以看起来经销商以循环方式发送给客户。因此，为了使我的 ping 正常工作，我必须将其发送给所有客户。如何？我订阅了监视器套接字并将每个连接的客户端添加到列表中。每次我ping，我ping每个客户。看：
import threading
import zmq
from zmq.utils import monitor
def threadify(func, daemon=True):
thread = threading.Thread(target=func)
thread.daemon = daemon
thread.start()
class zmqdealer(object):
def __init__(self, port):
context = zmq.Context()
self.sock = context.socket(zmq.DEALER)
self.monitor_sock = self.sock.get_monitor_socket()
self.sock.bind("tcp://*:%s" % port)
self.connected_clients = {}
threadify(func=self.poll)
threadify(func=self.monitor)
def poll(self):
while True:
reply = self.sock.recv()
if reply != "":
print reply
def add_client(self, event):
endpoint = event['endpoint']
value = event['value']
if endpoint in self.connected_clients:
self.connected_clients[endpoint].append(value)
else:
self.connected_clients[endpoint] = [value]
def remove_client(self, event):
endpoint = event['endpoint']
value = event['value']
if endpoint in self.connected_clients \
and value in self.connected_clients[endpoint]:
self.connected_clients[endpoint].remove(value)
def monitor(self):
options = {zmq.EVENT_ACCEPTED: lambda e: self.add_client(e),
zmq.EVENT_DISCONNECTED: lambda e: self.remove_client(e)}
while True:
event = monitor.recv_monitor_message(self.monitor_sock)
event_type = event['event']
if event_type in options:
options[event_type](event)
event['event'] = event_types[event_type]
print event
def ping(self):
connected_clients_amount = sum([len(clients) for clients in self.connected_clients.values()])
for i in xrange(connected_clients_amount):
self.sock.send_multipart(['', 'ping'])
if connected_clients_amount <= 0:
print "there are no connected clients!"
class zmqrep(object):
def __init__(self, ident, host, port):
context = zmq.Context()
self.sock = context.socket(zmq.REP)
self.sock.connect("tcp://%s:%s" % (host, port))
self.identity = ident
self.stopped = threading.Event()
threadify(self.pong)
def pong(self):
while not self.stopped.isSet():
request = self.sock.recv()
if request == "ping":
msg = "pong: %s" % self.identity
self.sock.send(msg)
self.sock.close()
def stop(self):
self.stopped.set()
if __name__ == "__main__":
port = 11112
host = "localhost"
num = 5
server = zmqdealer(port)
clients = [zmqrep(i.__str__(), host, port) for i in xrange(num)]
answer = raw_input('press <ENTER> to exit or type \'ping\' to get a pong\n')
while True:
if answer == "":
break
if answer == "ping":
server.ping()
if answer == "kill":
if len(clients) > 0:
die = clients[0]
clients.remove(die)
die.stop()
else:
print "there are no connected clients!\n"
answer = raw_input()