python irc bot 试图使用两个不同的消息系统

Question

我正在使用 python irc 模块 [1] 和 python 中的 pika 模块来创建一个 irc 机器人，它可以侦听频道消息和 rabbitmq 队列。

我从 [2] 中获取了源代码并向其中添加了 pika 元素：

#! /usr/bin/env python
#
# Example program using irc.client.
#
# This program is free without restrictions; do anything you like with
# it.
#
# Joel Rosdahl <joel@rosdahl.net>

import sys
import argparse
import itertools

import irc.client
import pika


target = "#test"
"The nick or channel to which to send messages"


def on_connect(connection, event):
  if irc.client.is_channel(target):
      connection.join(target)
      return
  main_loop(connection)


def on_join(connection, event):
  main_loop(connection)


def get_lines():
  while True:
      yield sys.stdin.readline().strip()


def main_loop(connection):
  for line in itertools.takewhile(bool, get_lines()):
      print(line)
      connection.privmsg(target, line)
  connection.quit("Using irc.client.py")


def on_disconnect(connection, event):
  raise SystemExit()


def get_args():
  parser = argparse.ArgumentParser()
  parser.add_argument('server')
  parser.add_argument('nickname')
  parser.add_argument('target', help="a nickname or channel")
  parser.add_argument('-p', '--port', default=6667, type=int)
  jaraco.logging.add_arguments(parser)
  return parser.parse_args()


def callback(ch, method, properties, body):
  print(" [x] Received %r" % body)


def get_channel():
  creds = pika.PlainCredentials('testuser', 'testing')

  params = pika.ConnectionParameters(
      host="localhost",
      virtual_host="/test",
      credentials=creds)

  connection = pika.BlockingConnection(params)
  channel = connection.channel()

  channel.queue_declare(queue='test')

  channel.basic_consume(
      queue='test', on_message_callback=callback, auto_ack=True)

  return channel


def main():
  chan = get_channel()

  reactor = irc.client.Reactor()
  try:
      c = reactor.server().connect("irc.local", 6667, "testuser")
  except irc.client.ServerConnectionError:
      print(sys.exc_info()[1])
      raise SystemExit(1)

  c.add_global_handler("welcome", on_connect)
  c.add_global_handler("join", on_join)
  c.add_global_handler("disconnect", on_disconnect)

  print("Processing reactor")
  reactor.process_forever()
  print("Channel : start consuming")
  channel.start_consuming()


if __name__ == '__main__':
  main()

上面代码的问题是我没有修改get_lines()代码来实际从消息队列中获取，因为我不知道要更改它的目的。

此外，'reactor.process_forever()' 行阻塞了 'channel.start_consuming()' 行，并且显然，如果我将 channel.start_consuming() 移动到 reactor.process_forever() 上方， reactor.process_forever() 没有运行.

在这一点上，我被难住了。我考虑过使用多处理线程；但是我的线程方面的经验是零，即使在阅读 [3] 之后，我也不完全确定那会有所帮助。老实说，这让我更加困惑。

我想添加一个 on_* 回调处理程序，但由于这些事件是全部基于 irc，处理程序不会监听 rabbitmq 队列。

有人可以建议如何同时运行和 process_forever() 循环和 start_consuming() 循环；也就是说，让机器人收听 irc 频道和消息队列？

谢谢！

:ed

[1] - https://github.com/jaraco/irc

[2] - https://github.com/jaraco/irc/blob/master/scripts/irccat.py

[3] - https://realpython.com/intro-to-python-threading/

Answer 1

感谢@fura（非常荣幸！）帮助阐明我可以做什么。最终运行结果代码如下：

#! /usr/bin/env python
#
# Example program using irc.client.
#
# This program is free without restrictions; do anything you like with
# it.
#
# Joel Rosdahl <joel@rosdahl.net>

import sys
import argparse
import itertools

import irc.client
import pika


target = "#test"
"The nick or channel to which to send messages"


def on_connect(connection, event):
    if irc.client.is_channel(target):
        connection.join(target)
        return


def on_disconnect(connection, event):
    raise SystemExit()


def get_channel():
    creds = pika.PlainCredentials('testuser', 'testing')

    params = pika.ConnectionParameters(
        host="msg.local",
        virtual_host="/test",
        credentials=creds)

    connection = pika.BlockingConnection(params)
    channel = connection.channel()

    channel.queue_declare(queue='test')

    return channel


def main():
    chan = get_channel()

    reactor = irc.client.Reactor()
    try:
        print("connect to server")
        c = reactor.server().connect("irc.local", 6667, "testUser")
    except irc.client.ServerConnectionError:
        print(sys.exc_info()[1])
        raise SystemExit(1)

    c.add_global_handler("welcome", on_connect)
    c.add_global_handler("disconnect", on_disconnect)

    print("Processing reactor")
    while True:
        reactor.process_once()
        mf, hdr, bd = chan.basic_get("test")
        if mf:
            chan.basic_ack(mf.delivery_tag)
            bdd = bd.decode('utf-8')
            if "cmd:" in bdd:
                p = bdd.replace("cmd:", "").strip()
                if p.lower() == "quit":
                    c.quit("Buckeroo Banzai!")
                else:
                    c.privmsg("#test", bdd)
            else:
                c.privmsg("#test", bdd)


if __name__ == '__main__':
    main()

当然，我用短信测试过这个..没有通过它发送过一个巨大的文本文件，所以不确定它是否有效或浪费资源。将需要付诸实践，看看它是否窒息。

再次感谢@fura，感谢您的帮助和建议！

:埃德

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