一、遠程過程調(diào)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.
簡單地，client可以調(diào)用server上提供的方法，然后得到執(zhí)行的結(jié)果。類似與webservice。
推薦查看xmlprc的源文件：C:\Python31\Lib\xmlrpc
二、實例
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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