zerorpc
zerorpc
注:python库自带的rpc模块是SimpleXMLRPCServer
1）安装zerorpc
#1) 通过pip
pip3 install zerorpc
# ERROR：
from _ctypes import Union, Structure, Array
ModuleNotFoundError: No module named '_ctypes'
# Python3中有个内置模块叫ctypes，
# 它是Python3的外部函数库模块，它提供兼容C语言的数据类型，并通过它调用Linux系统下的共享库(Shared library)，
# 此模块需要使用CentOS7系统中外部函数库(Foreign function library)的开发链接库(头文件和链接库)。
# 由于在CentOS7系统中没有安装外部函数库(libffi)的开发链接库软件包，所以在安装pip的时候就报了"ModuleNotFoundError: No module named '_ctypes'"的错误。
# Methods：
yum install libffi-devel -y
# 再去到python源码包安装目录重新编译安装
make install
2) 测试案例
# server
import zerorpc
class FirstRpc(object):
def first(self, content):
return "Hello %s" % coontent
s = zerorpc.Server(FirstRpc())
s.bind("tcp://0.0.0.0:4242")
s.run()
# client
import zerorpc
c = zerorpc.Client()
c.connect("tcp://127.0.0.1:4242")
print(c.first("Nice to meet you, RPC"))
3) 同时注册多个
# server
#!/usr/bin/python3
import zerorpc
_method = {}
def register(cls):
obj = cls()
prefix = cls.__name__
for k in dir(obj):
if not k.startswith('_') and callable(getattr(obj, k)):
x = {'{}:{}'.format(prefix, k) : getattr(obj, k)}
_method.update(x)
return cls
#{'{}:{}'.format(prefix, k) : getattr(obj, k) for k in dir(obj) if not k.startswith('_') and callable(getattr(obj, K))}
@register
class RpcServer1(object):
def add(self, x, y):
return x + y
def reduce(self, x, y):
return x - y
@register
class RpcServer2(object):
def add(self, x, y):
return x * y
def reduce(self, x , y):
return x / y
print("_method: %s" % _method)
server = zerorpc.Server(_method, heartbeat=20)
server.bind("tcp://{}:{}".format('127.0.0.1', 4242))
server.run()
"""
_method: {'RpcServer1:add': <bound method RpcServer1.add of <__main__.RpcServer1 object at 0x7f79935fca30>>, 'RpcServer1:reduce': <bound method RpcServer1.reduce of <__main__.RpcServer1 object at 0x7f79935fca30>>, 'RpcServer2:add': <bound method RpcServer2.add of <__main__.RpcServer2 object at 0x7f799357e220>>, 'RpcServer2:reduce': <bound method RpcServer2.reduce of <__main__.RpcServer2 object at 0x7f799357e220>>}
"""
##---------------------------------------------------------------------------------------------------------------------##
# client
#!/usr/bin/python3
import zerorpc
class Client(zerorpc.Client):
def __init__(self, *args, **kwargs):
self._prefix = kwargs.pop("prefix", "") # 没明白为什么要pop一个""
super(Client, self).__init__(*args, **kwargs)
# def set_prefix(self, prefix):
# self._prefix = prefix
def __getattr__(self, method):
method = ":".join([self._prefix, method]) if self._prefix else method
return lambda *args, **kwargs: self(method, *args, **kwargs)
if __name__ == "__main__":
c1 = Client(prefix="RpcServer1")
c1.connect('tcp://127.0.0.1:4242')
c2 = Client(prefix="RpcServer2")
c2.connect('tcp://127.0.0.1:4242')
print(c1.add(5, 5))
print(c2.add(5, 5))
