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<div class="section" id="module-SimpleXMLRPCServer">
<h1>20.24. <tt class="xref docutils literal"><span class="pre">SimpleXMLRPCServer</span></tt> — Basic XML-RPC server<a class="headerlink" href="#module-SimpleXMLRPCServer" title="Permalink to this headline">¶</a></h1>
<div class="admonition note">
<p class="first admonition-title">Note</p>
<p class="last">The <tt class="xref docutils literal"><span class="pre">SimpleXMLRPCServer</span></tt> module has been merged into
<tt class="xref docutils literal"><span class="pre">xmlrpc.server</span></tt> in Python 3.0. The <a class="reference external" href="../glossary.html#term-to3"><em class="xref">2to3</em></a> tool will automatically
adapt imports when converting your sources to 3.0.</p>
</div>
<p class="versionadded">
<span class="versionmodified">New in version 2.2.</span></p>
<p>The <tt class="xref docutils literal"><span class="pre">SimpleXMLRPCServer</span></tt> module provides a basic server framework for
XML-RPC servers written in Python. Servers can either be free standing, using
<tt class="xref docutils literal"><span class="pre">SimpleXMLRPCServer</span></tt>, or embedded in a CGI environment, using
<a title="SimpleXMLRPCServer.CGIXMLRPCRequestHandler" class="reference internal" href="#SimpleXMLRPCServer.CGIXMLRPCRequestHandler"><tt class="xref docutils literal"><span class="pre">CGIXMLRPCRequestHandler</span></tt></a>.</p>
<dl class="class">
<dt>
<tt class="descname">SimpleXMLRPCServer(addr[, requestHandler[, logRequests[, allow_none[, encoding[, bind_and_activate]]]])</tt></dt>
<dd><p>Create a new server instance. This class provides methods for registration of
functions that can be called by the XML-RPC protocol. The <em>requestHandler</em>
parameter should be a factory for request handler instances; it defaults to
<a title="SimpleXMLRPCServer.SimpleXMLRPCRequestHandler" class="reference internal" href="#SimpleXMLRPCServer.SimpleXMLRPCRequestHandler"><tt class="xref docutils literal"><span class="pre">SimpleXMLRPCRequestHandler</span></tt></a>. The <em>addr</em> and <em>requestHandler</em> parameters
are passed to the <tt class="xref docutils literal"><span class="pre">SocketServer.TCPServer</span></tt> constructor. If <em>logRequests</em>
is true (the default), requests will be logged; setting this parameter to false
will turn off logging. The <em>allow_none</em> and <em>encoding</em> parameters are passed
on to <a title="XML-RPC client access." class="reference external" href="xmlrpclib.html#module-xmlrpclib"><tt class="xref docutils literal"><span class="pre">xmlrpclib</span></tt></a> and control the XML-RPC responses that will be returned
from the server. The <em>bind_and_activate</em> parameter controls whether
<tt class="xref docutils literal"><span class="pre">server_bind()</span></tt> and <tt class="xref docutils literal"><span class="pre">server_activate()</span></tt> are called immediately by the
constructor; it defaults to true. Setting it to false allows code to manipulate
the <em>allow_reuse_address</em> class variable before the address is bound.</p>
<p class="versionchanged">
<span class="versionmodified">Changed in version 2.5: </span>The <em>allow_none</em> and <em>encoding</em> parameters were added.</p>
<p class="versionchanged">
<span class="versionmodified">Changed in version 2.6: </span>The <em>bind_and_activate</em> parameter was added.</p>
</dd></dl>
<dl class="class">
<dt id="SimpleXMLRPCServer.CGIXMLRPCRequestHandler">
<em class="property">class </em><tt class="descclassname">SimpleXMLRPCServer.</tt><tt class="descname">CGIXMLRPCRequestHandler</tt><big>(</big><span class="optional">[</span><em>allow_none</em><span class="optional">[</span>, <em>encoding</em><span class="optional">]</span><span class="optional">]</span><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.CGIXMLRPCRequestHandler" title="Permalink to this definition">¶</a></dt>
<dd><p>Create a new instance to handle XML-RPC requests in a CGI environment. The
<em>allow_none</em> and <em>encoding</em> parameters are passed on to <a title="XML-RPC client access." class="reference external" href="xmlrpclib.html#module-xmlrpclib"><tt class="xref docutils literal"><span class="pre">xmlrpclib</span></tt></a> and
control the XML-RPC responses that will be returned from the server.</p>
<p class="versionadded">
<span class="versionmodified">New in version 2.3.</span></p>
<p class="versionchanged">
<span class="versionmodified">Changed in version 2.5: </span>The <em>allow_none</em> and <em>encoding</em> parameters were added.</p>
</dd></dl>
<dl class="class">
<dt id="SimpleXMLRPCServer.SimpleXMLRPCRequestHandler">
<em class="property">class </em><tt class="descclassname">SimpleXMLRPCServer.</tt><tt class="descname">SimpleXMLRPCRequestHandler</tt><a class="headerlink" href="#SimpleXMLRPCServer.SimpleXMLRPCRequestHandler" title="Permalink to this definition">¶</a></dt>
<dd>Create a new request handler instance. This request handler supports <tt class="docutils literal"><span class="pre">POST</span></tt>
requests and modifies logging so that the <em>logRequests</em> parameter to the
<tt class="xref docutils literal"><span class="pre">SimpleXMLRPCServer</span></tt> constructor parameter is honored.</dd></dl>
<div class="section" id="simplexmlrpcserver-objects">
<span id="simple-xmlrpc-servers"></span><h2>20.24.1. SimpleXMLRPCServer Objects<a class="headerlink" href="#simplexmlrpcserver-objects" title="Permalink to this headline">¶</a></h2>
<p>The <tt class="xref docutils literal"><span class="pre">SimpleXMLRPCServer</span></tt> class is based on
<tt class="xref docutils literal"><span class="pre">SocketServer.TCPServer</span></tt> and provides a means of creating simple, stand
alone XML-RPC servers.</p>
<dl class="method">
<dt id="SimpleXMLRPCServer.SimpleXMLRPCServer.register_function">
<tt class="descclassname">SimpleXMLRPCServer.</tt><tt class="descname">register_function</tt><big>(</big><em>function</em><span class="optional">[</span>, <em>name</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.SimpleXMLRPCServer.register_function" title="Permalink to this definition">¶</a></dt>
<dd>Register a function that can respond to XML-RPC requests. If <em>name</em> is given,
it will be the method name associated with <em>function</em>, otherwise
<tt class="docutils literal"><span class="pre">function.__name__</span></tt> will be used. <em>name</em> can be either a normal or Unicode
string, and may contain characters not legal in Python identifiers, including
the period character.</dd></dl>
<dl class="method">
<dt id="SimpleXMLRPCServer.SimpleXMLRPCServer.register_instance">
<tt class="descclassname">SimpleXMLRPCServer.</tt><tt class="descname">register_instance</tt><big>(</big><em>instance</em><span class="optional">[</span>, <em>allow_dotted_names</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.SimpleXMLRPCServer.register_instance" title="Permalink to this definition">¶</a></dt>
<dd><p>Register an object which is used to expose method names which have not been
registered using <a title="SimpleXMLRPCServer.SimpleXMLRPCServer.register_function" class="reference internal" href="#SimpleXMLRPCServer.SimpleXMLRPCServer.register_function"><tt class="xref docutils literal"><span class="pre">register_function()</span></tt></a>. If <em>instance</em> contains a
<tt class="xref docutils literal"><span class="pre">_dispatch()</span></tt> method, it is called with the requested method name and the
parameters from the request. Its API is <tt class="docutils literal"><span class="pre">def</span> <span class="pre">_dispatch(self,</span> <span class="pre">method,</span> <span class="pre">params)</span></tt>
(note that <em>params</em> does not represent a variable argument list). If it calls
an underlying function to perform its task, that function is called as
<tt class="docutils literal"><span class="pre">func(*params)</span></tt>, expanding the parameter list. The return value from
<tt class="xref docutils literal"><span class="pre">_dispatch()</span></tt> is returned to the client as the result. If <em>instance</em> does
not have a <tt class="xref docutils literal"><span class="pre">_dispatch()</span></tt> method, it is searched for an attribute matching
the name of the requested method.</p>
<p>If the optional <em>allow_dotted_names</em> argument is true and the instance does not
have a <tt class="xref docutils literal"><span class="pre">_dispatch()</span></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="admonition warning">
<p class="first admonition-title">Warning</p>
<p class="last">Enabling the <em>allow_dotted_names</em> 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.</p>
</div>
<p class="versionchanged">
<span class="versionmodified">Changed in version 2.3.5,: </span>2.4.1
<em>allow_dotted_names</em> was added to plug a security hole; prior versions are
insecure.</p>
</dd></dl>
<dl class="method">
<dt id="SimpleXMLRPCServer.SimpleXMLRPCServer.register_introspection_functions">
<tt class="descclassname">SimpleXMLRPCServer.</tt><tt class="descname">register_introspection_functions</tt><big>(</big><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.SimpleXMLRPCServer.register_introspection_functions" title="Permalink to this definition">¶</a></dt>
<dd><p>Registers the XML-RPC introspection functions <tt class="docutils literal"><span class="pre">system.listMethods</span></tt>,
<tt class="docutils literal"><span class="pre">system.methodHelp</span></tt> and <tt class="docutils literal"><span class="pre">system.methodSignature</span></tt>.</p>
<p class="versionadded">
<span class="versionmodified">New in version 2.3.</span></p>
</dd></dl>
<dl class="method">
<dt id="SimpleXMLRPCServer.SimpleXMLRPCServer.register_multicall_functions">
<tt class="descclassname">SimpleXMLRPCServer.</tt><tt class="descname">register_multicall_functions</tt><big>(</big><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.SimpleXMLRPCServer.register_multicall_functions" title="Permalink to this definition">¶</a></dt>
<dd>Registers the XML-RPC multicall function system.multicall.</dd></dl>
<dl class="attribute">
<dt id="SimpleXMLRPCServer.SimpleXMLRPCRequestHandler.rpc_paths">
<tt class="descclassname">SimpleXMLRPCRequestHandler.</tt><tt class="descname">rpc_paths</tt><a class="headerlink" href="#SimpleXMLRPCServer.SimpleXMLRPCRequestHandler.rpc_paths" title="Permalink to this definition">¶</a></dt>
<dd><p>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 <tt class="docutils literal"><span class="pre">('/',</span> <span class="pre">'/RPC2')</span></tt>.</p>
<p class="versionadded">
<span class="versionmodified">New in version 2.5.</span></p>
</dd></dl>
<dl class="attribute">
<dt id="SimpleXMLRPCServer.SimpleXMLRPCRequestHandler.encode_threshold">
<tt class="descclassname">SimpleXMLRPCRequestHandler.</tt><tt class="descname">encode_threshold</tt><a class="headerlink" href="#SimpleXMLRPCServer.SimpleXMLRPCRequestHandler.encode_threshold" title="Permalink to this definition">¶</a></dt>
<dd><p>If this attribute is not <tt class="xref docutils literal"><span class="pre">None</span></tt>, responses larger than this value
will be encoded using the <em>gzip</em> transfer encoding, if permitted by
the client. The default is <tt class="docutils literal"><span class="pre">1400</span></tt> which corresponds roughly
to a single TCP packet.</p>
<p class="versionadded">
<span class="versionmodified">New in version 2.7.</span></p>
</dd></dl>
<div class="section" id="simplexmlrpcserver-example">
<span id="id1"></span><h3>20.24.1.1. SimpleXMLRPCServer Example<a class="headerlink" href="#simplexmlrpcserver-example" title="Permalink to this headline">¶</a></h3>
<p>Server code:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">from</span> <span class="nn">SimpleXMLRPCServer</span> <span class="kn">import</span> <span class="n">SimpleXMLRPCServer</span>
<span class="kn">from</span> <span class="nn">SimpleXMLRPCServer</span> <span class="kn">import</span> <span class="n">SimpleXMLRPCRequestHandler</span>
<span class="c"># Restrict to a particular path.</span>
<span class="k">class</span> <span class="nc">RequestHandler</span><span class="p">(</span><span class="n">SimpleXMLRPCRequestHandler</span><span class="p">):</span>
<span class="n">rpc_paths</span> <span class="o">=</span> <span class="p">(</span><span class="s">'/RPC2'</span><span class="p">,)</span>
<span class="c"># Create server</span>
<span class="n">server</span> <span class="o">=</span> <span class="n">SimpleXMLRPCServer</span><span class="p">((</span><span class="s">"localhost"</span><span class="p">,</span> <span class="mi">8000</span><span class="p">),</span>
<span class="n">requestHandler</span><span class="o">=</span><span class="n">RequestHandler</span><span class="p">)</span>
<span class="n">server</span><span class="o">.</span><span class="n">register_introspection_functions</span><span class="p">()</span>
<span class="c"># Register pow() function; this will use the value of</span>
<span class="c"># pow.__name__ as the name, which is just 'pow'.</span>
<span class="n">server</span><span class="o">.</span><span class="n">register_function</span><span class="p">(</span><span class="nb">pow</span><span class="p">)</span>
<span class="c"># Register a function under a different name</span>
<span class="k">def</span> <span class="nf">adder_function</span><span class="p">(</span><span class="n">x</span><span class="p">,</span><span class="n">y</span><span class="p">):</span>
<span class="k">return</span> <span class="n">x</span> <span class="o">+</span> <span class="n">y</span>
<span class="n">server</span><span class="o">.</span><span class="n">register_function</span><span class="p">(</span><span class="n">adder_function</span><span class="p">,</span> <span class="s">'add'</span><span class="p">)</span>
<span class="c"># Register an instance; all the methods of the instance are</span>
<span class="c"># published as XML-RPC methods (in this case, just 'div').</span>
<span class="k">class</span> <span class="nc">MyFuncs</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">div</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">):</span>
<span class="k">return</span> <span class="n">x</span> <span class="o">//</span> <span class="n">y</span>
<span class="n">server</span><span class="o">.</span><span class="n">register_instance</span><span class="p">(</span><span class="n">MyFuncs</span><span class="p">())</span>
<span class="c"># Run the server's main loop</span>
<span class="n">server</span><span class="o">.</span><span class="n">serve_forever</span><span class="p">()</span>
</pre></div>
</div>
<p>The following client code will call the methods made available by the preceding
server:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="kn">import</span> <span class="nn">xmlrpclib</span>
<span class="n">s</span> <span class="o">=</span> <span class="n">xmlrpclib</span><span class="o">.</span><span class="n">ServerProxy</span><span class="p">(</span><span class="s">'http://localhost:8000'</span><span class="p">)</span>
<span class="k">print</span> <span class="n">s</span><span class="o">.</span><span class="n">pow</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">)</span> <span class="c"># Returns 2**3 = 8</span>
<span class="k">print</span> <span class="n">s</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span><span class="mi">3</span><span class="p">)</span> <span class="c"># Returns 5</span>
<span class="k">print</span> <span class="n">s</span><span class="o">.</span><span class="n">div</span><span class="p">(</span><span class="mi">5</span><span class="p">,</span><span class="mi">2</span><span class="p">)</span> <span class="c"># Returns 5//2 = 2</span>
<span class="c"># Print list of available methods</span>
<span class="k">print</span> <span class="n">s</span><span class="o">.</span><span class="n">system</span><span class="o">.</span><span class="n">listMethods</span><span class="p">()</span>
</pre></div>
</div>
</div>
</div>
<div class="section" id="cgixmlrpcrequesthandler">
<h2>20.24.2. CGIXMLRPCRequestHandler<a class="headerlink" href="#cgixmlrpcrequesthandler" title="Permalink to this headline">¶</a></h2>
<p>The <a title="SimpleXMLRPCServer.CGIXMLRPCRequestHandler" class="reference internal" href="#SimpleXMLRPCServer.CGIXMLRPCRequestHandler"><tt class="xref docutils literal"><span class="pre">CGIXMLRPCRequestHandler</span></tt></a> class can be used to handle XML-RPC
requests sent to Python CGI scripts.</p>
<dl class="method">
<dt id="SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_function">
<tt class="descclassname">CGIXMLRPCRequestHandler.</tt><tt class="descname">register_function</tt><big>(</big><em>function</em><span class="optional">[</span>, <em>name</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_function" title="Permalink to this definition">¶</a></dt>
<dd>Register a function that can respond to XML-RPC requests. If <em>name</em> is given,
it will be the method name associated with function, otherwise
<em>function.__name__</em> will be used. <em>name</em> can be either a normal or Unicode
string, and may contain characters not legal in Python identifiers, including
the period character.</dd></dl>
<dl class="method">
<dt id="SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_instance">
<tt class="descclassname">CGIXMLRPCRequestHandler.</tt><tt class="descname">register_instance</tt><big>(</big><em>instance</em><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_instance" title="Permalink to this definition">¶</a></dt>
<dd>Register an object which is used to expose method names which have not been
registered using <a title="SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_function" class="reference internal" href="#SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_function"><tt class="xref docutils literal"><span class="pre">register_function()</span></tt></a>. If instance contains a
<tt class="xref docutils literal"><span class="pre">_dispatch()</span></tt> 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 <tt class="xref docutils literal"><span class="pre">_dispatch()</span></tt> 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.</dd></dl>
<dl class="method">
<dt id="SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_introspection_functions">
<tt class="descclassname">CGIXMLRPCRequestHandler.</tt><tt class="descname">register_introspection_functions</tt><big>(</big><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_introspection_functions" title="Permalink to this definition">¶</a></dt>
<dd>Register the XML-RPC introspection functions <tt class="docutils literal"><span class="pre">system.listMethods</span></tt>,
<tt class="docutils literal"><span class="pre">system.methodHelp</span></tt> and <tt class="docutils literal"><span class="pre">system.methodSignature</span></tt>.</dd></dl>
<dl class="method">
<dt id="SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_multicall_functions">
<tt class="descclassname">CGIXMLRPCRequestHandler.</tt><tt class="descname">register_multicall_functions</tt><big>(</big><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.CGIXMLRPCRequestHandler.register_multicall_functions" title="Permalink to this definition">¶</a></dt>
<dd>Register the XML-RPC multicall function <tt class="docutils literal"><span class="pre">system.multicall</span></tt>.</dd></dl>
<dl class="method">
<dt id="SimpleXMLRPCServer.CGIXMLRPCRequestHandler.handle_request">
<tt class="descclassname">CGIXMLRPCRequestHandler.</tt><tt class="descname">handle_request</tt><big>(</big><span class="optional">[</span><em>request_text = None</em><span class="optional">]</span><big>)</big><a class="headerlink" href="#SimpleXMLRPCServer.CGIXMLRPCRequestHandler.handle_request" title="Permalink to this definition">¶</a></dt>
<dd>Handle a XML-RPC request. If <em>request_text</em> is given, it should be the POST
data provided by the HTTP server, otherwise the contents of stdin will be used.</dd></dl>
<p>Example:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="k">class</span> <span class="nc">MyFuncs</span><span class="p">:</span>
<span class="k">def</span> <span class="nf">div</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span> <span class="p">:</span> <span class="k">return</span> <span class="n">x</span> <span class="o">//</span> <span class="n">y</span>
<span class="n">handler</span> <span class="o">=</span> <span class="n">CGIXMLRPCRequestHandler</span><span class="p">()</span>
<span class="n">handler</span><span class="o">.</span><span class="n">register_function</span><span class="p">(</span><span class="nb">pow</span><span class="p">)</span>
<span class="n">handler</span><span class="o">.</span><span class="n">register_function</span><span class="p">(</span><span class="k">lambda</span> <span class="n">x</span><span class="p">,</span><span class="n">y</span><span class="p">:</span> <span class="n">x</span><span class="o">+</span><span class="n">y</span><span class="p">,</span> <span class="s">'add'</span><span class="p">)</span>
<span class="n">handler</span><span class="o">.</span><span class="n">register_introspection_functions</span><span class="p">()</span>
<span class="n">handler</span><span class="o">.</span><span class="n">register_instance</span><span class="p">(</span><span class="n">MyFuncs</span><span class="p">())</span>
<span class="n">handler</span><span class="o">.</span><span class="n">handle_request</span><span class="p">()</span>
</pre></div>
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<li><a class="reference external" href="#">20.24. <tt class="docutils literal"><span class="pre">SimpleXMLRPCServer</span></tt> — Basic XML-RPC server</a><ul>
<li><a class="reference external" href="#simplexmlrpcserver-objects">20.24.1. SimpleXMLRPCServer Objects</a><ul>
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