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<title>11.23.1 SimpleXMLRPCServer Objects </title>
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<H2><A NAME="SECTION00132310000000000000000"></A><A NAME="simple-xmlrpc-servers"></A>
<BR>
11.23.1 SimpleXMLRPCServer Objects
</H2>
<P>
The <tt class="class">SimpleXMLRPCServer</tt> class is based on
<tt class="class">SocketServer.TCPServer</tt> and provides a means of creating
simple, stand alone XML-RPC servers.
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><tt id='l2h-3723' xml:id='l2h-3723' class="method">register_function</tt></b>(</nobr></td>
<td><var>function</var><big>[</big><var>,
name</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
Register a function that can respond to XML-RPC requests. If
<var>name</var> is given, it will be the method name associated with
<var>function</var>, otherwise <code><var>function</var>.__name__</code> will be
used. <var>name</var> can be either a normal or Unicode string, and may
contain characters not legal in Python identifiers, including the
period character.
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><tt id='l2h-3724' xml:id='l2h-3724' class="method">register_instance</tt></b>(</nobr></td>
<td><var>instance</var><big>[</big><var>,
allow_dotted_names</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
Register an object which is used to expose method names which have
not been registered using <tt class="method">register_function()</tt>. If
<var>instance</var> contains a <tt class="method">_dispatch()</tt> method, it is called
with the requested method name and the parameters from the request. Its
API is <code>def <tt class="method">_dispatch</tt>(self, method, params)</code> (note that
<var>params</var> does not represent a variable argument list). If it calls an
underlying function to perform its task, that function is called as
<code>func(*params)</code>, expanding the parameter list.
The return value from <tt class="method">_dispatch()</tt> is returned to the client as
the result. If
<var>instance</var> does not have a <tt class="method">_dispatch()</tt> method, it is
searched for an attribute matching the name of the requested method.
<P>
If the optional <var>allow_dotted_names</var> argument is true and the
instance does not have a <tt class="method">_dispatch()</tt> 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.
<P>
<div class="warning"><b class="label">Warning:</b>
Enabling the <var>allow_dotted_names</var> 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.
</div>
<P>
<span class="versionnote">Changed in version 2.3.5, 2.4.1:
<var>allow_dotted_names</var> was added to plug a security hole;
prior versions are insecure.</span>
<P>
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><tt id='l2h-3725' xml:id='l2h-3725' class="method">register_introspection_functions</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Registers the XML-RPC introspection functions <code>system.listMethods</code>,
<code>system.methodHelp</code> and <code>system.methodSignature</code>.
<span class="versionnote">New in version 2.3.</span>
</dl>
<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
<td><nobr><b><tt id='l2h-3726' xml:id='l2h-3726' class="method">register_multicall_functions</tt></b>(</nobr></td>
<td><var></var>)</td></tr></table></dt>
<dd>
Registers the XML-RPC multicall function system.multicall.
</dl>
<P>
Example:
<P>
<div class="verbatim"><pre>
class MyFuncs:
def div(self, x, y) : return x // y
server = SimpleXMLRPCServer(("localhost", 8000))
server.register_function(pow)
server.register_function(lambda x,y: x+y, 'add')
server.register_introspection_functions()
server.register_instance(MyFuncs())
server.serve_forever()
</pre></div>
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<span class="release-info">Release 2.4.3, documentation updated on 29 March 2006.</span>
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