cpython/Doc/library/xmlrpc.server.rst

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:mod:`xmlrpc.server` --- Basic XML-RPC servers
==============================================
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.. module:: xmlrpc.server
:synopsis: Basic XML-RPC server implementations.
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.. moduleauthor:: Brian Quinlan <brianq@activestate.com>
.. sectionauthor:: Fred L. Drake, Jr. <fdrake@acm.org>
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**Source code:** :source:`Lib/xmlrpc/server.py`
--------------
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The :mod:`xmlrpc.server` module provides a basic server framework for XML-RPC
servers written in Python. Servers can either be free standing, using
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:class:`SimpleXMLRPCServer`, or embedded in a CGI environment, using
:class:`CGIXMLRPCRequestHandler`.
.. class:: SimpleXMLRPCServer(addr, requestHandler=SimpleXMLRPCRequestHandler, logRequests=True, allow_none=False, encoding=None, bind_and_activate=True)
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Create a new server instance. This class provides methods for registration of
functions that can be called by the XML-RPC protocol. The *requestHandler*
parameter should be a factory for request handler instances; it defaults to
:class:`SimpleXMLRPCRequestHandler`. The *addr* and *requestHandler* parameters
are passed to the :class:`socketserver.TCPServer` constructor. If *logRequests*
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is true (the default), requests will be logged; setting this parameter to false
will turn off logging. The *allow_none* and *encoding* parameters are passed
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on to :mod:`xmlrpc.client` and control the XML-RPC responses that will be returned
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from the server. The *bind_and_activate* parameter controls whether
:meth:`server_bind` and :meth:`server_activate` are called immediately by the
constructor; it defaults to true. Setting it to false allows code to manipulate
the *allow_reuse_address* class variable before the address is bound.
.. class:: CGIXMLRPCRequestHandler(allow_none=False, encoding=None)
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Create a new instance to handle XML-RPC requests in a CGI environment. The
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*allow_none* and *encoding* parameters are passed on to :mod:`xmlrpc.client`
and control the XML-RPC responses that will be returned from the server.
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.. class:: SimpleXMLRPCRequestHandler()
Create a new request handler instance. This request handler supports ``POST``
requests and modifies logging so that the *logRequests* parameter to the
:class:`SimpleXMLRPCServer` constructor parameter is honored.
.. _simple-xmlrpc-servers:
SimpleXMLRPCServer Objects
--------------------------
The :class:`SimpleXMLRPCServer` class is based on
:class:`socketserver.TCPServer` and provides a means of creating simple, stand
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alone XML-RPC servers.
.. method:: SimpleXMLRPCServer.register_function(function, name=None)
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Register a function that can respond to XML-RPC requests. If *name* is given,
it will be the method name associated with *function*, otherwise
``function.__name__`` will be used. *name* can be either a normal or Unicode
string, and may contain characters not legal in Python identifiers, including
the period character.
.. method:: SimpleXMLRPCServer.register_instance(instance, allow_dotted_names=False)
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Register an object which is used to expose method names which have not been
registered using :meth:`register_function`. If *instance* contains a
:meth:`_dispatch` method, it is called with the requested method name and the
parameters from the request. Its API is ``def _dispatch(self, method, params)``
(note that *params* does not represent a variable argument list). If it calls
an underlying function to perform its task, that function is called as
``func(*params)``, expanding the parameter list. The return value from
:meth:`_dispatch` is returned to the client as the result. If *instance* does
not have a :meth:`_dispatch` method, it is searched for an attribute matching
the name of the requested method.
If the optional *allow_dotted_names* argument is true and the instance does not
have a :meth:`_dispatch` method, then if the requested method name contains
periods, each component of the method name is searched for individually, with
the effect that a simple hierarchical search is performed. The value found from
this search is then called with the parameters from the request, and the return
value is passed back to the client.
.. warning::
Enabling the *allow_dotted_names* option allows intruders to access your
module's global variables and may allow intruders to execute arbitrary code on
your machine. Only use this option on a secure, closed network.
.. method:: SimpleXMLRPCServer.register_introspection_functions()
Registers the XML-RPC introspection functions ``system.listMethods``,
``system.methodHelp`` and ``system.methodSignature``.
.. method:: SimpleXMLRPCServer.register_multicall_functions()
Registers the XML-RPC multicall function system.multicall.
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.. attribute:: SimpleXMLRPCRequestHandler.rpc_paths
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An attribute value that must be a tuple listing valid path portions of the URL
for receiving XML-RPC requests. Requests posted to other paths will result in a
404 "no such page" HTTP error. If this tuple is empty, all paths will be
considered valid. The default value is ``('/', '/RPC2')``.
Merged revisions 59275-59303 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! NOTE: The merge does NOT contain the modified file Python/import.c from r59288. I can't get it running. Nick, please check in the PEP 366 manually. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ........ r59279 | georg.brandl | 2007-12-02 19:17:50 +0100 (Sun, 02 Dec 2007) | 2 lines Fix a sentence I missed before. Do not merge to 3k. ........ r59281 | georg.brandl | 2007-12-02 22:58:54 +0100 (Sun, 02 Dec 2007) | 3 lines Add documentation for PySys_* functions. Written by Charlie Shepherd for GHOP. Also fixes #1245. ........ r59288 | nick.coghlan | 2007-12-03 13:55:17 +0100 (Mon, 03 Dec 2007) | 1 line Implement PEP 366 ........ r59290 | christian.heimes | 2007-12-03 14:47:29 +0100 (Mon, 03 Dec 2007) | 3 lines Applied my patch #1455 with some extra fixes for VS 2005 The new msvc9compiler module supports VS 2005 and VS 2008. I've also fixed build_ext to support PCbuild8 and PCbuild9 and backported my fix for xxmodule.c from py3k. The old code msvccompiler is still in place in case somebody likes to build an extension with VS 2003 or earlier. I've also updated the cygwin compiler module for VS 2005 and VS 2008. It works with VS 2005 but I'm unable to test it with VS 2008. We have to wait for a new version of cygwin. ........ r59291 | christian.heimes | 2007-12-03 14:55:16 +0100 (Mon, 03 Dec 2007) | 1 line Added comment to Misc/NEWS for r59290 ........ r59292 | christian.heimes | 2007-12-03 15:28:04 +0100 (Mon, 03 Dec 2007) | 1 line I followed MA Lemberg's suggestion and added comments to the late initialization of the type slots. ........ r59293 | facundo.batista | 2007-12-03 17:29:52 +0100 (Mon, 03 Dec 2007) | 3 lines Speedup and cleaning of __str__. Thanks Mark Dickinson. ........ r59294 | facundo.batista | 2007-12-03 18:55:00 +0100 (Mon, 03 Dec 2007) | 4 lines Faster _fix function, and some reordering for a more elegant coding. Thanks Mark Dickinson. ........ r59295 | martin.v.loewis | 2007-12-03 20:20:02 +0100 (Mon, 03 Dec 2007) | 5 lines Issue #1727780: Support loading pickles of random.Random objects created on 32-bit systems on 64-bit systems, and vice versa. As a consequence of the change, Random pickles created by Python 2.6 cannot be loaded in Python 2.5. ........ r59297 | facundo.batista | 2007-12-03 20:49:54 +0100 (Mon, 03 Dec 2007) | 3 lines Two small fixes. Issue 1547. ........ r59299 | georg.brandl | 2007-12-03 20:57:02 +0100 (Mon, 03 Dec 2007) | 2 lines #1548: fix apostroph placement. ........ r59300 | christian.heimes | 2007-12-03 21:01:02 +0100 (Mon, 03 Dec 2007) | 3 lines Patch #1537 from Chad Austin Change GeneratorExit's base class from Exception to BaseException (This time I'm applying the patch to the correct sandbox.) ........ r59302 | georg.brandl | 2007-12-03 21:03:46 +0100 (Mon, 03 Dec 2007) | 3 lines Add examples to the xmlrpclib docs. Written for GHOP by Josip Dzolonga. ........
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.. _simplexmlrpcserver-example:
SimpleXMLRPCServer Example
^^^^^^^^^^^^^^^^^^^^^^^^^^
Server code::
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from xmlrpc.server import SimpleXMLRPCServer
from xmlrpc.server import SimpleXMLRPCRequestHandler
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# Restrict to a particular path.
class RequestHandler(SimpleXMLRPCRequestHandler):
rpc_paths = ('/RPC2',)
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# Create server
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server = SimpleXMLRPCServer(("localhost", 8000),
requestHandler=RequestHandler)
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server.register_introspection_functions()
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# Register pow() function; this will use the value of
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# pow.__name__ as the name, which is just 'pow'.
server.register_function(pow)
# Register a function under a different name
def adder_function(x,y):
return x + y
server.register_function(adder_function, 'add')
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# Register an instance; all the methods of the instance are
# published as XML-RPC methods (in this case, just 'mul').
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class MyFuncs:
def mul(self, x, y):
return x * y
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server.register_instance(MyFuncs())
# Run the server's main loop
server.serve_forever()
Merged revisions 59275-59303 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! NOTE: The merge does NOT contain the modified file Python/import.c from r59288. I can't get it running. Nick, please check in the PEP 366 manually. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ........ r59279 | georg.brandl | 2007-12-02 19:17:50 +0100 (Sun, 02 Dec 2007) | 2 lines Fix a sentence I missed before. Do not merge to 3k. ........ r59281 | georg.brandl | 2007-12-02 22:58:54 +0100 (Sun, 02 Dec 2007) | 3 lines Add documentation for PySys_* functions. Written by Charlie Shepherd for GHOP. Also fixes #1245. ........ r59288 | nick.coghlan | 2007-12-03 13:55:17 +0100 (Mon, 03 Dec 2007) | 1 line Implement PEP 366 ........ r59290 | christian.heimes | 2007-12-03 14:47:29 +0100 (Mon, 03 Dec 2007) | 3 lines Applied my patch #1455 with some extra fixes for VS 2005 The new msvc9compiler module supports VS 2005 and VS 2008. I've also fixed build_ext to support PCbuild8 and PCbuild9 and backported my fix for xxmodule.c from py3k. The old code msvccompiler is still in place in case somebody likes to build an extension with VS 2003 or earlier. I've also updated the cygwin compiler module for VS 2005 and VS 2008. It works with VS 2005 but I'm unable to test it with VS 2008. We have to wait for a new version of cygwin. ........ r59291 | christian.heimes | 2007-12-03 14:55:16 +0100 (Mon, 03 Dec 2007) | 1 line Added comment to Misc/NEWS for r59290 ........ r59292 | christian.heimes | 2007-12-03 15:28:04 +0100 (Mon, 03 Dec 2007) | 1 line I followed MA Lemberg's suggestion and added comments to the late initialization of the type slots. ........ r59293 | facundo.batista | 2007-12-03 17:29:52 +0100 (Mon, 03 Dec 2007) | 3 lines Speedup and cleaning of __str__. Thanks Mark Dickinson. ........ r59294 | facundo.batista | 2007-12-03 18:55:00 +0100 (Mon, 03 Dec 2007) | 4 lines Faster _fix function, and some reordering for a more elegant coding. Thanks Mark Dickinson. ........ r59295 | martin.v.loewis | 2007-12-03 20:20:02 +0100 (Mon, 03 Dec 2007) | 5 lines Issue #1727780: Support loading pickles of random.Random objects created on 32-bit systems on 64-bit systems, and vice versa. As a consequence of the change, Random pickles created by Python 2.6 cannot be loaded in Python 2.5. ........ r59297 | facundo.batista | 2007-12-03 20:49:54 +0100 (Mon, 03 Dec 2007) | 3 lines Two small fixes. Issue 1547. ........ r59299 | georg.brandl | 2007-12-03 20:57:02 +0100 (Mon, 03 Dec 2007) | 2 lines #1548: fix apostroph placement. ........ r59300 | christian.heimes | 2007-12-03 21:01:02 +0100 (Mon, 03 Dec 2007) | 3 lines Patch #1537 from Chad Austin Change GeneratorExit's base class from Exception to BaseException (This time I'm applying the patch to the correct sandbox.) ........ r59302 | georg.brandl | 2007-12-03 21:03:46 +0100 (Mon, 03 Dec 2007) | 3 lines Add examples to the xmlrpclib docs. Written for GHOP by Josip Dzolonga. ........
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The following client code will call the methods made available by the preceding
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server::
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import xmlrpc.client
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s = xmlrpc.client.ServerProxy('http://localhost:8000')
print(s.pow(2,3)) # Returns 2**3 = 8
print(s.add(2,3)) # Returns 5
print(s.mul(5,2)) # Returns 5*2 = 10
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# Print list of available methods
print(s.system.listMethods())
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CGIXMLRPCRequestHandler
-----------------------
The :class:`CGIXMLRPCRequestHandler` class can be used to handle XML-RPC
requests sent to Python CGI scripts.
.. method:: CGIXMLRPCRequestHandler.register_function(function, name=None)
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Register a function that can respond to XML-RPC requests. If *name* is given,
it will be the method name associated with function, otherwise
*function.__name__* will be used. *name* can be either a normal or Unicode
string, and may contain characters not legal in Python identifiers, including
the period character.
.. method:: CGIXMLRPCRequestHandler.register_instance(instance)
Register an object which is used to expose method names which have not been
registered using :meth:`register_function`. If instance contains a
:meth:`_dispatch` method, it is called with the requested method name and the
parameters from the request; the return value is returned to the client as the
result. If instance does not have a :meth:`_dispatch` method, it is searched
for an attribute matching the name of the requested method; if the requested
method name contains periods, each component of the method name is searched for
individually, with the effect that a simple hierarchical search is performed.
The value found from this search is then called with the parameters from the
request, and the return value is passed back to the client.
.. method:: CGIXMLRPCRequestHandler.register_introspection_functions()
Register the XML-RPC introspection functions ``system.listMethods``,
``system.methodHelp`` and ``system.methodSignature``.
.. method:: CGIXMLRPCRequestHandler.register_multicall_functions()
Register the XML-RPC multicall function ``system.multicall``.
.. method:: CGIXMLRPCRequestHandler.handle_request(request_text=None)
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Handle a XML-RPC request. If *request_text* is given, it should be the POST
data provided by the HTTP server, otherwise the contents of stdin will be used.
Example::
class MyFuncs:
def mul(self, x, y):
return x * y
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handler = CGIXMLRPCRequestHandler()
handler.register_function(pow)
handler.register_function(lambda x,y: x+y, 'add')
handler.register_introspection_functions()
handler.register_instance(MyFuncs())
handler.handle_request()
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Documenting XMLRPC server
-------------------------
These classes extend the above classes to serve HTML documentation in response
to HTTP GET requests. Servers can either be free standing, using
:class:`DocXMLRPCServer`, or embedded in a CGI environment, using
:class:`DocCGIXMLRPCRequestHandler`.
.. class:: DocXMLRPCServer(addr, requestHandler=DocXMLRPCRequestHandler, logRequests=True, allow_none=False, encoding=None, bind_and_activate=True)
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Create a new server instance. All parameters have the same meaning as for
:class:`SimpleXMLRPCServer`; *requestHandler* defaults to
:class:`DocXMLRPCRequestHandler`.
.. class:: DocCGIXMLRPCRequestHandler()
Create a new instance to handle XML-RPC requests in a CGI environment.
.. class:: DocXMLRPCRequestHandler()
Create a new request handler instance. This request handler supports XML-RPC
POST requests, documentation GET requests, and modifies logging so that the
*logRequests* parameter to the :class:`DocXMLRPCServer` constructor parameter is
honored.
.. _doc-xmlrpc-servers:
DocXMLRPCServer Objects
-----------------------
The :class:`DocXMLRPCServer` class is derived from :class:`SimpleXMLRPCServer`
and provides a means of creating self-documenting, stand alone XML-RPC
servers. HTTP POST requests are handled as XML-RPC method calls. HTTP GET
requests are handled by generating pydoc-style HTML documentation. This allows a
server to provide its own web-based documentation.
.. method:: DocXMLRPCServer.set_server_title(server_title)
Set the title used in the generated HTML documentation. This title will be used
inside the HTML "title" element.
.. method:: DocXMLRPCServer.set_server_name(server_name)
Set the name used in the generated HTML documentation. This name will appear at
the top of the generated documentation inside a "h1" element.
.. method:: DocXMLRPCServer.set_server_documentation(server_documentation)
Set the description used in the generated HTML documentation. This description
will appear as a paragraph, below the server name, in the documentation.
DocCGIXMLRPCRequestHandler
--------------------------
The :class:`DocCGIXMLRPCRequestHandler` class is derived from
:class:`CGIXMLRPCRequestHandler` and provides a means of creating
self-documenting, XML-RPC CGI scripts. HTTP POST requests are handled as XML-RPC
method calls. HTTP GET requests are handled by generating pydoc-style HTML
documentation. This allows a server to provide its own web-based documentation.
.. method:: DocCGIXMLRPCRequestHandler.set_server_title(server_title)
Set the title used in the generated HTML documentation. This title will be used
inside the HTML "title" element.
.. method:: DocCGIXMLRPCRequestHandler.set_server_name(server_name)
Set the name used in the generated HTML documentation. This name will appear at
the top of the generated documentation inside a "h1" element.
.. method:: DocCGIXMLRPCRequestHandler.set_server_documentation(server_documentation)
Set the description used in the generated HTML documentation. This description
will appear as a paragraph, below the server name, in the documentation.