Python XML RPC服务器端和客户端实例

一、远程过程调用RPC

XML-RPC is a Remote Procedure Call method that uses XML passed via HTTP as a transport. With it, a client can call methods with parameters on a remote server (the server is named by a URI) and get back structured data. This module supports writing XML-RPC client code; it handles all the details of translating between conformable Python objects and XML on the wire.

简单地，client可以调用server上提供的方法，然后得到执行的结果。类似与webservice。

推荐查看xmlprc的源文件：C:\Python31\Lib\xmlrpc

二、实例

1） Server

from xmlrpc.server import SimpleXMLRPCServer

from xmlrpc.server import SimpleXMLRPCRequestHandler
def div(x,y):

 return x - y

 

class Math:

 def _listMethods(self):

 # this method must be present for system.listMethods

 # to work

 return ['add', 'pow']

 def _methodHelp(self, method):

 # this method must be present for system.methodHelp

 # to work

 if method == 'add':

 return "add(2,3) => 5"

 elif method == 'pow':

 return "pow(x, y[, z]) => number"

 else:

 # By convention, return empty

 # string if no help is available

 return ""

 def _dispatch(self, method, params):

 if method == 'pow':

 return pow(*params)

 elif method == 'add':

 return params[0] + params[1]

 else:

 raise 'bad method'
server = SimpleXMLRPCServer(("localhost", 8000))

server.register_introspection_functions()

server.register_function(div,"div")

server.register_function(lambda x,y: x*y, 'multiply')

server.register_instance(Math())

server.serve_forever()

2）client

import xmlrpc.client
s = xmlrpc.client.ServerProxy('http://localhost:8000')
print(s.system.listMethods())
print(s.pow(2,3)) # Returns 28

print(s.add(2,3)) # Returns 5

print(s.div(3,2)) # Returns 1

print(s.multiply(4,5)) # Returns 20

3）result

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