如何使用posix消息队列在节点和python之间进行IPC？

Question

我试图在一个名为“IPC”的应用程序之间编写一个名为“IPC”的应用程序。目前，当一条新消息到达Python应用程序时，我遇到了一个解析错误。代码是：

Python：

from ipcqueue import posixmq
from time import sleep

q1 = posixmq.Queue('/fila1')

while True:

    while q1.qsize() > 0:
        print('p1: Recebi na minha fila: ' + str(q1.get()))

    sleep(0.5)

节点：

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当第二个应用程序发送消息时，python应用程序失败：

File "../test-fila1.py", line 9, in

print('p1: Recebi na minha fila: ' + str(q1.get()))   File "/usr/lib/python3.7/site-packages/ipcqueue/posixmq.py", line 174, in

get

return self._serializer.loads(data)   File "/usr/lib/python3.7/site-packages/ipcqueue/serializers.py", line 14,

in loads

return pickle.loads(data) KeyError: 101

[2]- Exit 1 python3 ../test-fila1.py [3]+ Done node index.js

编辑
因此，我决定将问题从“keyrerror:101 when loading ipc message between node and python apps”改为“How to ipc between node and python using posix message queue？”因为我刚刚注意到，我发布的示例代码在每次运行它们时都会生成不同的错误。现在发生的错误是（但是，没有更改代码）：

Traceback (most recent call last): File "snippets/test-fila1.py",
line 9, in
print('p1: Recebi na minha fila: ' + str(q1.get())) File "/usr/lib/python3.7/site-packages/ipcqueue/posixmq.py", line 174, in
get
return self._serializer.loads(data) File "/usr/lib/python3.7/site-packages/ipcqueue/serializers.py", line 14,
in loads
return pickle.loads(data)
_pickle.UnpicklingError: unpickling stack underflow

Answer 1

如果您查看Queue的__init__

class Queue(object):
    """
    POSIX message queue.
    """

    def __init__(self, name, maxsize=10, maxmsgsize=1024, serializer=PickleSerializer):

如您所见，默认的serializer是PickleSerializer，这意味着当您从nodejs发送原始数据时，它假设队列上的数据被pickle。修复很简单，使用RawSerializer

^{pr2}$