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<h3>
XML-RPC</h3>
<p>XML-RPC is a specification and a set of implementations that allow
software running on different operating systems and different environments to
make procedure calls over the Internet. As a simple RPC protocol, it converts
simple data types into an XML-based format, and then ships them over the
network using HTTP-POST requests as the transport and XML as the encoding. The
procedure executes on the server and the value it returns is also formatted in
XML. Procedure parameters can be scalars, numbers, strings, dates, and so on;
they can also be complex record and list structures.</p>
<P>XML-RPC is designed to be as simple as possible, while allowing
complex data structures to be transmitted, processed, and returned. This re-use
of high-level ideas such as XML and HTTP makes it inefficient in comparison to
a binary format, but it also makes it easy to implement; implementations
already exist for Java, Python, Perl, and Tcl, and Zope 2.0.</P>
<P>The XML-RPC library is copyrighted, but can be used without fee. This
also applies to commercial applications. For more information, check out</P>
<blocKQUOte>
<p>
<p>XML-RPC</P>
</P>
<P>
<P>
<a target="_blank" href="http://www.xmlrpc.com/">http://www.xmlrpc.com/</a></p>
</p>
<p>
<p>The XML-RPC specification documents the XML-RPC protocol
implemented in Frontier 5.1.</p>
</p>
<p>
<p>
<A taRget="_blank" Href="http://www.xml-rpc.com/spec/">http://www.xml-rpc.com/spec/</a></P>
</p>
<p>
<p>
<A TARget="_blank" hREF="http://www.scripting.com/frontier5/xml/code/rpc.html">http://www.scripting.com/frontier5/xml/code/rpc.html</A></p>
</p>
<p>
<p>XML-RPC for Newbies, by Dave Winer</P>
</P>
<P>
<P>
<a tarGET="_blank" Href="http://davenet.userland.com/1998/07/14/xmlRpcForNewbies">http://davenet.userland.com/1998/07/14/xmlRpcForNewbies</a></p>
</p>
</blockquote>
<h4>The Python Implementation</h4>
<p>PythonWare's
<a NamE="idx1073747293"></a>Fredrik Lundhs
<a nAme="idx1073747294"></a>
<a Name="idx1073747295"></A><TT Class="monofont">xmlrpc</TT> package provides everything you
need to build clients and servers in Python:</P>
<P>
<a tarGET="_blank" Href="http://www.pythonware.com/products/xmlrpc/">http://www.pythonware.com/products/xmlrpc/</a>
<A NAMe="idx1073747296"></a>
<a name="idx1073747297"></a>
<a name="idx1073747298"></a>
<a name="idx1073747299"></a></P>
<p>
<a Name="idx1073747300"></A>Secret Labs'
<a namE="idx1073747301"></a>
<a nAME="idx1073747302"></A><tt clASS="monofont">xmlrpclib</Tt> module is a client-side
implementation of the XML-RPC protocol. This implementation is tightly
integrated with Python, which makes it very easy to call remote methods. For
example, here's the Python code needed to call one of Userland's sample
servers:</p>
<prE>
betty =
Server("http://betty.userland.com") print betty.examples.getStateName(41)
</PRE>
<p>This results in a remote call to the
<tt cLASS="monofont">examples.getStateName</tt> method published by the <tt class="monofont">betty
server,</tt> with the integer 41 as the single argument. The result from
this call is a string with the value <tt class="monofont">"South Dakota".</tt></P>
<p>The marshalling and parsing classes provided by this module can
also be used in XML-RPC server implementations. Sample code for Medusa and
Python's SocketServer module is also included in the current release.</p>
<H4>
Working with Zope</h4>
<p>
<a Name="idx1073747303"></a>Amos Latteier at
<A namE="idx1073747304"></A>Digital Creations has written an
<A Name="idx1073747305"></a><I>XML-RPC How To for Zope Users</I>. Among
other things, it contains code to handle authentication issues and access
control.</P>
<P>The idea of using Zope to handle XML-RPC is based on the fact that
every Zope object can respond to HTTP requests.</p>
<p>The <i>How To</i> covers the use of Zope as an
XML-RPC server, and as an XML-RPC client. The document also shows how to extend
Fredrik Lundh's XML-RPC Python module to support sending requests with basic
authentication. It can be found at</P>
<P>
<A TargeT="_blank" HREf="http://www.zope.org/Members/Amos/XML-RPC">http://www.zope.org/Members/Amos/XML-RPC</a>
<a name="idx1073747306"></a>
<a name="idx1073747307"></a>
<a name="idx1073747308"></a>
<A naMe="idx1073747309"></a>
<a Name="idx1073747310"></a>
<A namE="idx1073747311"></A></P>
</Font>
<P><TABLE width="100%" border=0><TR valign="top"><TD><font size=1 color="#C0C0C0"><br></font></TD><TD align=right><font size=1 color="#C0C0C0">Last updated on 1/30/2002<br>Python Developer's Handbook, © 2002 Sams Publishing</font></TD></TR></TABLE></P>
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</TD></TR></TABLE>
<br><TABLE width=100% bgcolor=white border=0 cellspacing=0 cellpadding=5><TR><TD><H4 class=Title>Index terms contained in this section</H4>
<font size=2>
data<BR>
manipulating<BR>
<a href="#idx1073747296">XML-RPC library</a> <a href="#idx1073747306">2nd</a><BR>
databases<BR>
<a href="#idx1073747310">Zope Object (ZODB)</a><BR>
<a href="#idx1073747304">Digital Creations</a><BR>
<a href="#idx1073747303">Latteier, Amos</a><BR>
libraries<BR>
<a href="#idx1073747299">XML-RPC</a> <a href="#idx1073747309">2nd</a><BR>
<a href="#idx1073747293">Lundhs, Fredrik</a><BR>
manipulating<BR>
data<BR>
<a href="#idx1073747297">XML-RPC library</a> <a href="#idx1073747307">2nd</a><BR>
packages<BR>
<a href="#idx1073747295">xmlrpc</a><BR>
<a href="#idx1073747300">Secret Labs</a><BR>
<a href="#idx1073747305">XML-RPC How To for Zope Users</a><BR>
XML-RPC library<BR>
<a href="#idx1073747298">manipulating data</a> <a href="#idx1073747308">2nd</a><BR>
<a href="#idx1073747294">xmlrpc package</a><BR>
<a href="#idx1073747301">xmlrpclib module</a> <a href="#idx1073747302">2nd</a><BR>
<a href="#idx1073747311">Zope Object Database (ZODB)</a><BR>
<BR>
</font></TD></TR></TABLE>
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