xmlrpc introspection

poiboy bitbucket at safe-mail.net
Thu Apr 24 14:34:27 CEST 2003

Quick answer: Register 'system.listMethods', 'system.methodSignature',
and 'system.methodHelp' in your server and make sure they perform as
stated in the docs (listMethods returns a list of strings, etc.). Yup
- just do it all by hand.

The output for these methods are typical <methodResponse>s (snippets
available at http://www.xmlrpc.org/spec) - which *should* be taken
care of automatically by the XMLRPC server; lists and/or strings
converted to something like

<?xml version="1.0"?>

..for 'server.listMethods'. In other words, you *shouldn't* have to
worry about the raw XML. Verify your server's output democratically
via the debugger link above
(http://www.dscpl.com.au/xmlrpc-debugger.php - added to my bookmarks,
mahalo Graham!) or manually by testing 'server.listMethods' at

A headstart on introspection can be found at
http://xmlrpc-c.sourceforge.net/hacks/xmlrpc_registry.py, and there's
a detailed account of a comprehensive 'system.describeMethods'
implementation at http://xmlrpc-epi.sourceforge.net/specs/rfc.system.describeMethods.php
which I recommend for practical documentation consideration.

Two unsolicited cents worth: Complimentary RPC test cases are
invaluable (list all methods as links, click to test individually or
click "test all"). Had to get that off my chest.

Aloha, the poiboy

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