为什么python代码无法远程连接到RabbitMQ？

Question

我正在尝试从一台机器连接到另一台安装了 RabbitMQ 的远程服务器。RabbitMQ 在本地运行良好，但是当我从另一台机器连接到它时，会发生错误：

root@xxx:~# python3 rabbitmq.py
Traceback (most recent call last):
  File "rabbitmq.py", line 8, in <module>
    connection = pika.BlockingConnection(pika.ConnectionParameters(parameters))
  File "/usr/local/lib/python3.4/dist-packages/pika/connection.py", line 652, in __init__
    self.host = host
  File "/usr/local/lib/python3.4/dist-packages/pika/connection.py", line 392, in host
    (value,))
TypeError: host must be a str or unicode str, but got <ConnectionParameters host=111.111.111.111 port=5672 virtual_host=product ssl=False>
root@xxx:~#

TypeError: host must be a str or unicode str, but got ConnectionParameters host=111.111.111.111 port=5672 virtual_host=product ssl=False

其他远程机器上的 Python 代码：

import pika
credentials = pika.PlainCredentials(username='remoteuser', password='mypassword')
parameters = pika.ConnectionParameters(host='111.111.111.111', port=5672, virtual_host='/', credentials=credentials)
#connection = pika.BlockingConnection(pika.ConnectionParameters('111.111.111.111:15672')) # --- it doesn't work too
connection = pika.BlockingConnection(pika.ConnectionParameters(parameters))
channel = connection.channel()
channel.queue_declare(queue='hello')
channel.basic_publish(exchange='', routing_key='hello', body='Hello World!')
print(" [x] Sent 'Hello World!'")
connection.close()

用户“remoteuser”具有管理员权限并访问虚拟主机“/”

http://111.111.111.111:15672/#/users

Name        Tags            Can access virtual hosts    Has password
remoteuser  administrator   /                               ?

问题是什么？

Answer 1

你有双重包裹parameters，改变：

connection = pika.BlockingConnection(pika.ConnectionParameters(parameters))

到：

connection = pika.BlockingConnection(parameters)