1 :mod:`SimpleXMLRPCServer` --- Basic XML-RPC server
2 ==================================================
4 .. module:: SimpleXMLRPCServer
5 :synopsis: Basic XML-RPC server implementation.
6 .. moduleauthor:: Brian Quinlan <brianq@activestate.com>
7 .. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org>
10 The :mod:`SimpleXMLRPCServer` module has been merged into
11 :mod:`xmlrpc.server` in Python 3.0. The :term:`2to3` tool will automatically
12 adapt imports when converting your sources to 3.0.
17 The :mod:`SimpleXMLRPCServer` module provides a basic server framework for
18 XML-RPC servers written in Python. Servers can either be free standing, using
19 :class:`SimpleXMLRPCServer`, or embedded in a CGI environment, using
20 :class:`CGIXMLRPCRequestHandler`.
23 .. class:: SimpleXMLRPCServer(addr[, requestHandler[, logRequests[, allow_none[, encoding]]]])
25 Create a new server instance. This class provides methods for registration of
26 functions that can be called by the XML-RPC protocol. The *requestHandler*
27 parameter should be a factory for request handler instances; it defaults to
28 :class:`SimpleXMLRPCRequestHandler`. The *addr* and *requestHandler* parameters
29 are passed to the :class:`SocketServer.TCPServer` constructor. If *logRequests*
30 is true (the default), requests will be logged; setting this parameter to false
31 will turn off logging. The *allow_none* and *encoding* parameters are passed
32 on to :mod:`xmlrpclib` and control the XML-RPC responses that will be returned
33 from the server. The *bind_and_activate* parameter controls whether
34 :meth:`server_bind` and :meth:`server_activate` are called immediately by the
35 constructor; it defaults to true. Setting it to false allows code to manipulate
36 the *allow_reuse_address* class variable before the address is bound.
38 .. versionchanged:: 2.5
39 The *allow_none* and *encoding* parameters were added.
41 .. versionchanged:: 2.6
42 The *bind_and_activate* parameter was added.
45 .. class:: CGIXMLRPCRequestHandler([allow_none[, encoding]])
47 Create a new instance to handle XML-RPC requests in a CGI environment. The
48 *allow_none* and *encoding* parameters are passed on to :mod:`xmlrpclib` and
49 control the XML-RPC responses that will be returned from the server.
53 .. versionchanged:: 2.5
54 The *allow_none* and *encoding* parameters were added.
57 .. class:: SimpleXMLRPCRequestHandler()
59 Create a new request handler instance. This request handler supports ``POST``
60 requests and modifies logging so that the *logRequests* parameter to the
61 :class:`SimpleXMLRPCServer` constructor parameter is honored.
64 .. _simple-xmlrpc-servers:
66 SimpleXMLRPCServer Objects
67 --------------------------
69 The :class:`SimpleXMLRPCServer` class is based on
70 :class:`SocketServer.TCPServer` and provides a means of creating simple, stand
71 alone XML-RPC servers.
74 .. method:: SimpleXMLRPCServer.register_function(function[, name])
76 Register a function that can respond to XML-RPC requests. If *name* is given,
77 it will be the method name associated with *function*, otherwise
78 ``function.__name__`` will be used. *name* can be either a normal or Unicode
79 string, and may contain characters not legal in Python identifiers, including
83 .. method:: SimpleXMLRPCServer.register_instance(instance[, allow_dotted_names])
85 Register an object which is used to expose method names which have not been
86 registered using :meth:`register_function`. If *instance* contains a
87 :meth:`_dispatch` method, it is called with the requested method name and the
88 parameters from the request. Its API is ``def _dispatch(self, method, params)``
89 (note that *params* does not represent a variable argument list). If it calls
90 an underlying function to perform its task, that function is called as
91 ``func(*params)``, expanding the parameter list. The return value from
92 :meth:`_dispatch` is returned to the client as the result. If *instance* does
93 not have a :meth:`_dispatch` method, it is searched for an attribute matching
94 the name of the requested method.
96 If the optional *allow_dotted_names* argument is true and the instance does not
97 have a :meth:`_dispatch` method, then if the requested method name contains
98 periods, each component of the method name is searched for individually, with
99 the effect that a simple hierarchical search is performed. The value found from
100 this search is then called with the parameters from the request, and the return
101 value is passed back to the client.
105 Enabling the *allow_dotted_names* option allows intruders to access your
106 module's global variables and may allow intruders to execute arbitrary code on
107 your machine. Only use this option on a secure, closed network.
109 .. versionchanged:: 2.3.5, 2.4.1
110 *allow_dotted_names* was added to plug a security hole; prior versions are
114 .. method:: SimpleXMLRPCServer.register_introspection_functions()
116 Registers the XML-RPC introspection functions ``system.listMethods``,
117 ``system.methodHelp`` and ``system.methodSignature``.
119 .. versionadded:: 2.3
122 .. method:: SimpleXMLRPCServer.register_multicall_functions()
124 Registers the XML-RPC multicall function system.multicall.
127 .. attribute:: SimpleXMLRPCRequestHandler.rpc_paths
129 An attribute value that must be a tuple listing valid path portions of the URL
130 for receiving XML-RPC requests. Requests posted to other paths will result in a
131 404 "no such page" HTTP error. If this tuple is empty, all paths will be
132 considered valid. The default value is ``('/', '/RPC2')``.
134 .. versionadded:: 2.5
136 .. attribute:: SimpleXMLRPCRequestHandler.encode_threshold
138 If this attribute is not ``None``, responses larger than this value
139 will be encoded using the *gzip* transfer encoding, if permitted by
140 the client. The default is ``1400`` which corresponds roughly
141 to a single TCP packet.
143 .. versionadded:: 2.7
145 .. _simplexmlrpcserver-example:
147 SimpleXMLRPCServer Example
148 ^^^^^^^^^^^^^^^^^^^^^^^^^^
151 from SimpleXMLRPCServer import SimpleXMLRPCServer
152 from SimpleXMLRPCServer import SimpleXMLRPCRequestHandler
154 # Restrict to a particular path.
155 class RequestHandler(SimpleXMLRPCRequestHandler):
156 rpc_paths = ('/RPC2',)
159 server = SimpleXMLRPCServer(("localhost", 8000),
160 requestHandler=RequestHandler)
161 server.register_introspection_functions()
163 # Register pow() function; this will use the value of
164 # pow.__name__ as the name, which is just 'pow'.
165 server.register_function(pow)
167 # Register a function under a different name
168 def adder_function(x,y):
170 server.register_function(adder_function, 'add')
172 # Register an instance; all the methods of the instance are
173 # published as XML-RPC methods (in this case, just 'div').
178 server.register_instance(MyFuncs())
180 # Run the server's main loop
181 server.serve_forever()
183 The following client code will call the methods made available by the preceding
188 s = xmlrpclib.ServerProxy('http://localhost:8000')
189 print s.pow(2,3) # Returns 2**3 = 8
190 print s.add(2,3) # Returns 5
191 print s.div(5,2) # Returns 5//2 = 2
193 # Print list of available methods
194 print s.system.listMethods()
197 CGIXMLRPCRequestHandler
198 -----------------------
200 The :class:`CGIXMLRPCRequestHandler` class can be used to handle XML-RPC
201 requests sent to Python CGI scripts.
204 .. method:: CGIXMLRPCRequestHandler.register_function(function[, name])
206 Register a function that can respond to XML-RPC requests. If *name* is given,
207 it will be the method name associated with function, otherwise
208 *function.__name__* will be used. *name* can be either a normal or Unicode
209 string, and may contain characters not legal in Python identifiers, including
210 the period character.
213 .. method:: CGIXMLRPCRequestHandler.register_instance(instance)
215 Register an object which is used to expose method names which have not been
216 registered using :meth:`register_function`. If instance contains a
217 :meth:`_dispatch` method, it is called with the requested method name and the
218 parameters from the request; the return value is returned to the client as the
219 result. If instance does not have a :meth:`_dispatch` method, it is searched
220 for an attribute matching the name of the requested method; if the requested
221 method name contains periods, each component of the method name is searched for
222 individually, with the effect that a simple hierarchical search is performed.
223 The value found from this search is then called with the parameters from the
224 request, and the return value is passed back to the client.
227 .. method:: CGIXMLRPCRequestHandler.register_introspection_functions()
229 Register the XML-RPC introspection functions ``system.listMethods``,
230 ``system.methodHelp`` and ``system.methodSignature``.
233 .. method:: CGIXMLRPCRequestHandler.register_multicall_functions()
235 Register the XML-RPC multicall function ``system.multicall``.
238 .. method:: CGIXMLRPCRequestHandler.handle_request([request_text = None])
240 Handle a XML-RPC request. If *request_text* is given, it should be the POST
241 data provided by the HTTP server, otherwise the contents of stdin will be used.
246 def div(self, x, y) : return x // y
249 handler = CGIXMLRPCRequestHandler()
250 handler.register_function(pow)
251 handler.register_function(lambda x,y: x+y, 'add')
252 handler.register_introspection_functions()
253 handler.register_instance(MyFuncs())
254 handler.handle_request()