2 :mod:`SimpleXMLRPCServer` --- Basic XML-RPC server
3 ==================================================
5 .. module:: SimpleXMLRPCServer
6 :synopsis: Basic XML-RPC server implementation.
7 .. moduleauthor:: Brian Quinlan <brianq@activestate.com>
8 .. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org>
13 The :mod:`SimpleXMLRPCServer` module provides a basic server framework for
14 XML-RPC servers written in Python. Servers can either be free standing, using
15 :class:`SimpleXMLRPCServer`, or embedded in a CGI environment, using
16 :class:`CGIXMLRPCRequestHandler`.
19 .. class:: SimpleXMLRPCServer(addr[, requestHandler[, logRequests[, allow_none[, encoding]]]])
21 Create a new server instance. This class provides methods for registration of
22 functions that can be called by the XML-RPC protocol. The *requestHandler*
23 parameter should be a factory for request handler instances; it defaults to
24 :class:`SimpleXMLRPCRequestHandler`. The *addr* and *requestHandler* parameters
25 are passed to the :class:`socketserver.TCPServer` constructor. If *logRequests*
26 is true (the default), requests will be logged; setting this parameter to false
27 will turn off logging. The *allow_none* and *encoding* parameters are passed
28 on to :mod:`xmlrpclib` and control the XML-RPC responses that will be returned
29 from the server. The *bind_and_activate* parameter controls whether
30 :meth:`server_bind` and :meth:`server_activate` are called immediately by the
31 constructor; it defaults to true. Setting it to false allows code to manipulate
32 the *allow_reuse_address* class variable before the address is bound.
34 .. versionchanged:: 2.5
35 The *allow_none* and *encoding* parameters were added.
37 .. versionchanged:: 2.6
38 The *bind_and_activate* parameter was added.
41 .. class:: CGIXMLRPCRequestHandler([allow_none[, encoding]])
43 Create a new instance to handle XML-RPC requests in a CGI environment. The
44 *allow_none* and *encoding* parameters are passed on to :mod:`xmlrpclib` and
45 control the XML-RPC responses that will be returned from the server.
49 .. versionchanged:: 2.5
50 The *allow_none* and *encoding* parameters were added.
53 .. class:: SimpleXMLRPCRequestHandler()
55 Create a new request handler instance. This request handler supports ``POST``
56 requests and modifies logging so that the *logRequests* parameter to the
57 :class:`SimpleXMLRPCServer` constructor parameter is honored.
60 .. _simple-xmlrpc-servers:
62 SimpleXMLRPCServer Objects
63 --------------------------
65 The :class:`SimpleXMLRPCServer` class is based on
66 :class:`socketserver.TCPServer` and provides a means of creating simple, stand
67 alone XML-RPC servers.
70 .. method:: SimpleXMLRPCServer.register_function(function[, name])
72 Register a function that can respond to XML-RPC requests. If *name* is given,
73 it will be the method name associated with *function*, otherwise
74 ``function.__name__`` will be used. *name* can be either a normal or Unicode
75 string, and may contain characters not legal in Python identifiers, including
79 .. method:: SimpleXMLRPCServer.register_instance(instance[, allow_dotted_names])
81 Register an object which is used to expose method names which have not been
82 registered using :meth:`register_function`. If *instance* contains a
83 :meth:`_dispatch` method, it is called with the requested method name and the
84 parameters from the request. Its API is ``def _dispatch(self, method, params)``
85 (note that *params* does not represent a variable argument list). If it calls
86 an underlying function to perform its task, that function is called as
87 ``func(*params)``, expanding the parameter list. The return value from
88 :meth:`_dispatch` is returned to the client as the result. If *instance* does
89 not have a :meth:`_dispatch` method, it is searched for an attribute matching
90 the name of the requested method.
92 If the optional *allow_dotted_names* argument is true and the instance does not
93 have a :meth:`_dispatch` method, then if the requested method name contains
94 periods, each component of the method name is searched for individually, with
95 the effect that a simple hierarchical search is performed. The value found from
96 this search is then called with the parameters from the request, and the return
97 value is passed back to the client.
101 Enabling the *allow_dotted_names* option allows intruders to access your
102 module's global variables and may allow intruders to execute arbitrary code on
103 your machine. Only use this option on a secure, closed network.
105 .. versionchanged:: 2.3.5, 2.4.1
106 *allow_dotted_names* was added to plug a security hole; prior versions are
110 .. method:: SimpleXMLRPCServer.register_introspection_functions()
112 Registers the XML-RPC introspection functions ``system.listMethods``,
113 ``system.methodHelp`` and ``system.methodSignature``.
115 .. versionadded:: 2.3
118 .. method:: SimpleXMLRPCServer.register_multicall_functions()
120 Registers the XML-RPC multicall function system.multicall.
123 .. attribute:: SimpleXMLRPCRequestHandler.rpc_paths
125 An attribute value that must be a tuple listing valid path portions of the URL
126 for receiving XML-RPC requests. Requests posted to other paths will result in a
127 404 "no such page" HTTP error. If this tuple is empty, all paths will be
128 considered valid. The default value is ``('/', '/RPC2')``.
130 .. versionadded:: 2.5
132 .. _simplexmlrpcserver-example:
134 SimpleXMLRPCServer Example
135 ^^^^^^^^^^^^^^^^^^^^^^^^^^
138 from SimpleXMLRPCServer import SimpleXMLRPCServer
139 from SimpleXMLRPCServer import SimpleXMLRPCRequestHandler
141 # Restrict to a particular path.
142 class RequestHandler(SimpleXMLRPCRequestHandler):
143 rpc_paths = ('/RPC2',)
146 server = SimpleXMLRPCServer(("localhost", 8000),
147 requestHandler=RequestHandler)
148 server.register_introspection_functions()
150 # Register pow() function; this will use the value of
151 # pow.__name__ as the name, which is just 'pow'.
152 server.register_function(pow)
154 # Register a function under a different name
155 def adder_function(x,y):
157 server.register_function(adder_function, 'add')
159 # Register an instance; all the methods of the instance are
160 # published as XML-RPC methods (in this case, just 'div').
165 server.register_instance(MyFuncs())
167 # Run the server's main loop
168 server.serve_forever()
170 The following client code will call the methods made available by the preceding
175 s = xmlrpclib.ServerProxy('http://localhost:8000')
176 print s.pow(2,3) # Returns 2**3 = 8
177 print s.add(2,3) # Returns 5
178 print s.div(5,2) # Returns 5//2 = 2
180 # Print list of available methods
181 print s.system.listMethods()
184 CGIXMLRPCRequestHandler
185 -----------------------
187 The :class:`CGIXMLRPCRequestHandler` class can be used to handle XML-RPC
188 requests sent to Python CGI scripts.
191 .. method:: CGIXMLRPCRequestHandler.register_function(function[, name])
193 Register a function that can respond to XML-RPC requests. If *name* is given,
194 it will be the method name associated with function, otherwise
195 *function.__name__* will be used. *name* can be either a normal or Unicode
196 string, and may contain characters not legal in Python identifiers, including
197 the period character.
200 .. method:: CGIXMLRPCRequestHandler.register_instance(instance)
202 Register an object which is used to expose method names which have not been
203 registered using :meth:`register_function`. If instance contains a
204 :meth:`_dispatch` method, it is called with the requested method name and the
205 parameters from the request; the return value is returned to the client as the
206 result. If instance does not have a :meth:`_dispatch` method, it is searched
207 for an attribute matching the name of the requested method; if the requested
208 method name contains periods, each component of the method name is searched for
209 individually, with the effect that a simple hierarchical search is performed.
210 The value found from this search is then called with the parameters from the
211 request, and the return value is passed back to the client.
214 .. method:: CGIXMLRPCRequestHandler.register_introspection_functions()
216 Register the XML-RPC introspection functions ``system.listMethods``,
217 ``system.methodHelp`` and ``system.methodSignature``.
220 .. method:: CGIXMLRPCRequestHandler.register_multicall_functions()
222 Register the XML-RPC multicall function ``system.multicall``.
225 .. method:: CGIXMLRPCRequestHandler.handle_request([request_text = None])
227 Handle a XML-RPC request. If *request_text* is given, it should be the POST
228 data provided by the HTTP server, otherwise the contents of stdin will be used.
233 def div(self, x, y) : return x // y
236 handler = CGIXMLRPCRequestHandler()
237 handler.register_function(pow)
238 handler.register_function(lambda x,y: x+y, 'add')
239 handler.register_introspection_functions()
240 handler.register_instance(MyFuncs())
241 handler.handle_request()