Python xml rpc server and client instance, pythonrpc

Python xml rpc server and client instance, pythonrpc

I. Remote Procedure Call 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.

In short, the client can call the methods provided on the server and obtain the execution result. Similar to webservice.

We recommend that you check the xmlprc source file: C: \ Python31 \ Lib \ xmlrpc.

Ii. Instances

1) Server

Copy codeThe Code is as follows:

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

Copy codeThe Code is as follows:

Import xmlrpc. client

S = xmlrpc. client. ServerProxy ('HTTP: // localhost: 8080 ')

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