使用XML库的方式,实现RPC通信的方法(推荐)

1、先说结论：使用xml-rpc的机制可以很方便的实现服务器间的RPC调用。

2、试验结果如下：

3、源码如下：

服务器端的源代码如下：

import operator, math
from SimpleXMLRPCServer import SimpleXMLRPCServer
from functools import reduce

def main():
  server = SimpleXMLRPCServer(('127.0.0.1', 7001))
  server.register_introspection_functions()
  server.register_multicall_functions()
  server.register_function(addtogether)
  server.register_function(quadratic)
  server.register_function(remote_repr)

  print("Server ready")
  server.serve_forever()

def addtogether(*things):
  """Add together everything in the list things ."""
  return reduce(operator.add, things)

def quadratic(a, b, c):
  """Determine x values satisfying: a * x * x + b * x + c = 0"""
  b24ac = math.sqrt(b*b - 4.0*a*c)
  return list(set([(-b-b24ac) / 2.0*a, (-b+b24ac) / 2.0*a]))

def remote_repr(arg):
  """return the repr() rendering of the supplied arg """
  return arg

if __name__ == '__main__':
  main()

客户端的代码如下：

import xmlrpclib

def main():
  proxy = xmlrpclib.ServerProxy('http://127.0.0.1:7001')

  print("Here are the functions supported by this server:")

  print("next calculator addtogether: ")
  print(proxy.addtogether('x','y','z'))
  print(proxy.addtogether('x','y','z'))

  print(proxy.addtogether('x','y','z'))
  print(proxy.addtogether('x','y','z'))
  for method_name in proxy.system.listMethods():
    if method_name.startswith('system.'):
      continue

    signatures = proxy.system.methodSignature(method_name)
    if isinstance(signatures, list) and signatures:
      for signature in signatures:
        print('%s(%s)' %(method_name, signature))

    else:
      print('%s(...)' %(method_name,))

    method_help = proxy.system.methodHelp(method_name)
    #if method_help:
    #  print(' ', methodHelp)

  print(proxy.addtogether('x','y','z'))
  print("addtogether result ")

if __name__ == '__main__':
  main()

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