如何编写Twisted客户端插件

Question

我曾经用过twisted来实现一个客户端。 工作正常。 现在，我希望能够向其传递命令行参数，因此我需要实现一个twisted插件。 我已经进行了许多搜索以查找可以显示如何将程序转换为插件的资源。 但是我找不到我想要的东西。

这是我的client.py代码的相关部分：

import sys
import time
import os
import errno
import re
from stat import *
global runPath

runPath = '/home/a02/Desktop/'

from twisted.python import log
from GlobalVariables import *
from twisted.internet import reactor, threads, endpoints
from time import sleep
from twisted.internet.protocol import ClientFactory# , Protocol
from twisted.protocols import basic
import copy


class MyChat(basic.LineReceiver):
    def connectionMade(self):
        print "Connected to the server!"
        EchoClientFactory.buildClientObject(self.factory, self)
        self.runPythonCommands = RunPythonCommands ()
        return

    def connectionLost(self, reason):
        print "Lost Connection With Server!"
        #self.factory.clients.remove(self)
        #self.transport.loseConnection()
        print 'connection aborted!'
        #reactor.callFromThread(reactor.stop)
        reactor.stop ()
        return

    def lineReceived(self, line):
        #print "received", repr(line)
        line = line.strip ()
        if line == "EOF":
            print "Test Completed"
        self.factory.getLastReceivedMsg (line)
        exeResult = self.runPythonCommands.runPythonCommand(line.strip())

        self.sendLine(exeResult)
        EchoClientFactory.lastReceivedMessage = ""
        EchoClientFactory.clientObject[0].receivedMessages = []
        return

    def message (self, line):
        self.sendLine(line)
        #print line
        return


class EchoClientFactory(ClientFactory):
    protocol = MyChat
    clientObject = []
    lastReceivedMessage = ''

    def buildClientObject (self, newClient):
        client = Client ()
        self.clientObject.append(client)
        self.clientObject[0].objectProtocolInstance = newClient

        return

    def getLastReceivedMsg (self, message):
        self.lastReceivedMessage = message
        self.clientObject [0].lastReceivedMsg = message
        self.clientObject[0].receivedMessages.append (message)
        return 
    def connectionLost (self):
        reactor.stop()
        return

    def clientConnectionFailed(self, connector, reason):
        print 'Connection failed. Reason:', reason
        connector.connect () 
        return

这是我为client_plugin.py写的client_plugin.py ：

from zope.interface import implements
from twisted.python import usage
from twisted.plugin import IPlugin
from twisted.application.service import IServiceMaker
from twisted.application.internet import TCPServer
from twisted.spread import pb
from slave.client import EchoClientFactory,MyChat, Client, RunPythonCommands, MyError, line


class Options(usage.Options):
    optParameters = [["port", "p", 8789, "The port number to listen on."], ["host", "h", "192.168.47.187", "The host to connect to"]]

class MyServiceMaker(object):
    implements(IServiceMaker, IPlugin)
    tapname = "echoclient"
    description = "Echo Client"
    options = Options

    def makeService(self, options):
        clientfactory = pb.PBServerFactory(EchoClientFactory ())
        return TCPServer(options["host"],int(options["port"]), clientfactory)

serviceMaker = MyServiceMaker()

我使用了文档中提到的相同文件夹层次结构。 由于我在网络上找不到足够的插件示例，因此我真的很困在这一点上。 我将不胜感激任何帮助。 有人可以告诉我如何更改代码吗？ 先感谢您。

Answer 1

您是否应该使用tac文件从命令行运行它？

http://twistedmatrix.com/documents/12.2.0/core/howto/application.html#auto5

然后在另一个程序中使用MyChat类应该更容易...

Answer 2

您必须从MyServiceMaker().makeService方法返回一个主要服务对象。 尝试from twisted.internet import service中添加，然后在makeService添加到开头： top_service = service.Multiservice()创建TCPServer服务： tcp_service = TCPServer(...)将其添加到顶级服务： tcp_service.setServiceParent(top_service)然后返回顶级服务： return top_service

您可能还需要看一下Dave Peticolas撰写的一系列优秀教程（第16条是对您的问题有用的教程）

Answer 3

只需点击以下链接即可获得文档和帮助：

twistedmatrix-文档

twisted.readthedocs.io -docs

from __future__ import print_function

from twisted.internet import reactor
from twisted.web.client import Agent
from twisted.web.http_headers import Headers

agent = Agent(reactor)

d = agent.request(
    'GET',
    'http://example.com/',
    Headers({'User-Agent': ['Twisted Web Client Example']}),
    None)

def cbResponse(ignored):
    print('Response received')
d.addCallback(cbResponse)

def cbShutdown(ignored):
    reactor.stop()
d.addBoth(cbShutdown)

reactor.run()

输出：

C:\Python27>python.exe twist001.py
Response received