我正在尝试创建一个与我的本地代码库（客户端部分）通信的扭曲守护程序（服务器部分）。基本上，客户端应该使用AMP来调用Remote（）来为守护进程启动一些处理（更新数据库）的一些方法。在服务器上完成每个方法的处理后，我需要服务器将callRemote（）发送到我的客户端，以便用户知道服务器的进度。
我已经能够从客户端调用服务器并获得响应，但我无法让服务器向客户端发送响应。
我已经google了一个解决方案，但我找不到任何使用AMP进行双向通信的示例代码 - 它总是客户端调用服务器。
我正在尝试让客户端调用服务器以开始处理（ServerStart AMP命令），然后让服务器向客户端发送多个调用以提供处理更新（MessageClient AMP命令）。 / p>
任何帮助都会非常感激。一个超级简单的例子，展示了如何从客户端调用服务器，然后让服务器将两个调用传回客户端，这将是非常棒的！
ampclient.py
from client_server import MessageServer, Client, ServerStart
from twisted.internet.protocol import ClientCreator
from twisted.internet import reactor
from twisted.protocols import amp
from time import sleep
from twisted.internet.protocol import Factory
from twisted.internet.endpoints import TCP4ServerEndpoint
from twisted.application.service import Application
from twisted.application.internet import StreamServerEndpointService
def startServerProcess():
def show_start(result):
print 'result from server: %r' % result
d = ClientCreator(reactor, amp.AMP).connectTCP(
'127.0.0.1', 1234).addCallback(
lambda p: p.callRemote(ServerStart, truncate=True)).addCallback(
show_start)
pf = Factory()
pf.protocol = Client
reactor.listenTCP(1235, pf)
print 'client listening'
startServerProcess()
sleep(4)
reactor.run()
ampserver.py
from client_server import MessageClient, Server
from twisted.internet.protocol import ClientCreator
from twisted.internet import reactor
from twisted.protocols import amp
from time import sleep
from twisted.internet.protocol import Factory
from twisted.internet.endpoints import TCP4ServerEndpoint
from twisted.application.service import Application
from twisted.application.internet import StreamServerEndpointService
def makeClientCall():
def show_result(result):
print 'result from client: %r' % result
d = ClientCreator(reactor, amp.AMP).connectTCP(
'127.0.0.1', 1235).addCallback(
lambda p: p.callRemote(MessageClient)).addCallback(
show_result)
application = Application("server app")
endpoint = TCP4ServerEndpoint(reactor, 1234)
factory = Factory()
factory.protocol = Server
service = StreamServerEndpointService(endpoint, factory)
service.setServiceParent(application)
sleep(4)
makeClientCall()
makeClientCall()
client_server.py
from twisted.protocols import amp
from twisted.internet import reactor
from twisted.internet.protocol import Factory
from twisted.internet.endpoints import TCP4ServerEndpoint
from twisted.application.service import Application
from twisted.application.internet import StreamServerEndpointService
class MessageServer(amp.Command):
response = [('msg', amp.String())]
class ServerStart(amp.Command):
arguments = [('truncate', amp.Boolean())]
response = [('msg', amp.String())]
class Server(amp.AMP):
def message_it(self):
msg = 'This is a message from the server'
print 'msg sent to client: %s' % msg
return {'msg': msg}
MessageServer.responder(message_it)
def start_it(self, truncate):
msg = 'Starting processing...'
return {'msg': msg}
ServerStart.responder(start_it)
class MessageClient(amp.Command):
response = [('msg', amp.String())]
class Client(amp.AMP):
def message_it(self):
msg = 'This is a message from the client'
return {'msg': msg}
MessageClient.responder(message_it)
答案 0 :(得分：4)
以下是双向AMP客户端和服务器的简单示例。关键是AMP协议类保存对客户端连接的引用，并提供callRemote方法。
当然，我只是通过挖掘AMP代码才知道这一点。扭曲的文档至多缺乏，至少在核心之外。
文件：count_server.tac
from twisted.protocols.amp import AMP
from twisted.internet import reactor
from twisted.internet.protocol import Factory
from twisted.internet.endpoints import TCP4ServerEndpoint
from twisted.application.service import Application
from twisted.application.internet import StreamServerEndpointService
from count_client import Counter
application = Application('test AMP server')
endpoint = TCP4ServerEndpoint(reactor, 8750)
factory = Factory()
factory.protocol = Counter
service = StreamServerEndpointService(endpoint, factory)
service.setServiceParent(application)
文件：count_client.py
if __name__ == '__main__':
import count_client
raise SystemExit(count_client.main())
from sys import stdout
from twisted.python.log import startLogging, err
from twisted.protocols import amp
from twisted.internet import reactor
from twisted.internet.protocol import Factory
from twisted.internet.endpoints import TCP4ClientEndpoint
class Count(amp.Command):
arguments = [('n', amp.Integer())]
response = [('ok', amp.Boolean())]
class Counter(amp.AMP):
@Count.responder
def count(self, n):
print 'received:', n
n += 1
if n < 10:
print 'sending:', n
self.callRemote(Count, n=n)
return {'ok': True}
def connect():
endpoint = TCP4ClientEndpoint(reactor, '127.0.0.1', 8750)
factory = Factory()
factory.protocol = Counter
return endpoint.connect(factory)
def main():
startLogging(stdout)
d = connect()
d.addErrback(err, 'connection failed')
d.addCallback(lambda p: p.callRemote(Count, n=1))
d.addErrback(err, 'call failed')
reactor.run()
服务器输出：
$ twistd -n -y count_server.tac
2013-03-27 11:05:18-0500 [-] Log opened.
2013-03-27 11:05:18-0500 [-] twistd 12.2.0 (/usr/bin/python 2.7.3) starting up.
2013-03-27 11:05:18-0500 [-] reactor class: twisted.internet.epollreactor.EPollReactor.
2013-03-27 11:05:18-0500 [-] Factory starting on 8750
2013-03-27 11:05:18-0500 [-] Starting factory <twisted.internet.protocol.Factory instance at 0x2adc368>
2013-03-27 11:05:22-0500 [twisted.internet.protocol.Factory] Counter connection established (HOST:IPv4Address(TCP, '127.0.0.1', 8750) PEER:IPv4Address(TCP, '127.0.0.1', 58195))
2013-03-27 11:05:22-0500 [Counter,0,127.0.0.1] received: 1
2013-03-27 11:05:22-0500 [Counter,0,127.0.0.1] sending: 2
2013-03-27 11:05:22-0500 [Counter,0,127.0.0.1] received: 3
2013-03-27 11:05:22-0500 [Counter,0,127.0.0.1] sending: 4
2013-03-27 11:05:22-0500 [Counter,0,127.0.0.1] received: 5
2013-03-27 11:05:22-0500 [Counter,0,127.0.0.1] sending: 6
2013-03-27 11:05:22-0500 [Counter,0,127.0.0.1] received: 7
2013-03-27 11:05:22-0500 [Counter,0,127.0.0.1] sending: 8
2013-03-27 11:05:22-0500 [Counter,0,127.0.0.1] received: 9
2013-03-27 11:05:26-0500 [Counter,0,127.0.0.1] Counter connection lost (HOST:IPv4Address(TCP, '127.0.0.1', 8750) PEER:IPv4Address(TCP, '127.0.0.1', 58195))
^C2013-03-27 11:05:31-0500 [-] Received SIGINT, shutting down.
2013-03-27 11:05:31-0500 [-] (TCP Port 8750 Closed)
2013-03-27 11:05:31-0500 [-] Stopping factory <twisted.internet.protocol.Factory instance at 0x2adc368>
2013-03-27 11:05:31-0500 [-] Main loop terminated.
2013-03-27 11:05:31-0500 [-] Server Shut Down.
客户输出：
$ python count_client.py
2013-03-27 11:05:22-0500 [-] Log opened.
2013-03-27 11:05:22-0500 [-] Starting factory <twisted.internet.protocol.Factory instance at 0x246bf80>
2013-03-27 11:05:22-0500 [Uninitialized] Counter connection established (HOST:IPv4Address(TCP, '127.0.0.1', 58195) PEER:IPv4Address(TCP, '127.0.0.1', 8750))
2013-03-27 11:05:22-0500 [Counter,client] received: 2
2013-03-27 11:05:22-0500 [Counter,client] sending: 3
2013-03-27 11:05:22-0500 [Counter,client] received: 4
2013-03-27 11:05:22-0500 [Counter,client] sending: 5
2013-03-27 11:05:22-0500 [Counter,client] received: 6
2013-03-27 11:05:22-0500 [Counter,client] sending: 7
2013-03-27 11:05:22-0500 [Counter,client] received: 8
2013-03-27 11:05:22-0500 [Counter,client] sending: 9
^C2013-03-27 11:05:26-0500 [-] Received SIGINT, shutting down.
2013-03-27 11:05:26-0500 [Counter,client] Counter connection lost (HOST:IPv4Address(TCP, '127.0.0.1', 58195) PEER:IPv4Address(TCP, '127.0.0.1', 8750))
2013-03-27 11:05:26-0500 [Counter,client] Stopping factory <twisted.internet.protocol.Factory instance at 0x246bf80>
2013-03-27 11:05:26-0500 [-] Main loop terminated.
答案 1 :(得分：1)
Ryan P之前的回应还有待改进。特别是，它实际上从未使用AMP响应，而是更喜欢在任何地方链接callRemote调用。这是我的答案，基于twserver中的ampserver.py（未更改）和ampclient.py（重写）示例。这以适合问题的方式回答了双向消息传递的基本问题（虽然不完全是描述）。
简短摘要，添加一个对callRemote延迟的回调，它将在其参数中包含响应。它是一个普通的字典，所以你可以用它做你想做的事。
文件：ampserver.py
from twisted.protocols import amp
class Sum(amp.Command):
arguments = [('a', amp.Integer()),
('b', amp.Integer())]
response = [('total', amp.Integer())]
class Divide(amp.Command):
arguments = [('numerator', amp.Integer()),
('denominator', amp.Integer())]
response = [('result', amp.Float())]
errors = {ZeroDivisionError: 'ZERO_DIVISION'}
class Math(amp.AMP):
def sum(self, a, b):
total = a + b
print 'Did a sum: %d + %d = %d' % (a, b, total)
return {'total': total}
Sum.responder(sum)
def divide(self, numerator, denominator):
result = float(numerator) / denominator
print 'Divided: %d / %d = %f' % (numerator, denominator, result)
return {'result': result}
Divide.responder(divide)
def main():
from twisted.internet import reactor
from twisted.internet.protocol import Factory
pf = Factory()
pf.protocol = Math
reactor.listenTCP(1234, pf)
print 'started'
reactor.run()
if __name__ == '__main__':
main()
文件：ampclient.py
from twisted.internet import reactor, protocol
from twisted.internet.task import deferLater
from twisted.protocols import amp
from ampserver import Sum, Divide
connection = None
class MathClient(amp.AMP):
def connectionMade(self):
global connection
connection = self
class MathFactory(protocol.ReconnectingClientFactory):
protocol = MathClient
if __name__ == '__main__':
reactor.connectTCP('127.0.0.1', 1234, MathFactory())
def simpleSum():
global connection
d = connection.callRemote(Sum, a=1, b=5)
def prin(result):
print(result)
d.addCallback(prin)
return d
deferLater(reactor, 1, simpleSum)
deferLater(reactor, 3, simpleSum)
deferLater(reactor, 6, simpleSum)
deferLater(reactor, 9, simpleSum)
deferLater(reactor, 12, simpleSum)
deferLater(reactor, 15, simpleSum)
deferLater(reactor, 18, simpleSum).addCallback(lambda _: reactor.stop())
reactor.run()