WikiGateway is a library of functions which allows you to act as a client to a wiki website, executing operations like getPage, putPage, and getRecentChanges. WikiGateway translates your requests into the idiosyncratic HTML form interfaces of various popular wiki servers. Basically, it does Wiki I/O and import/export.
It can be used either as a Perl module or as a web service providing XmlRpcToWiki.
Currently it only works with UseMod and MoinMoin 
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(http://www.emacswiki.org/cgi-bin/community/WikiGateway)
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This functionality is already provided by WikiRpc, so that Perl module is maybe only needed for wikis without WikiRpc. With MoinMoin and Python, you can use Python's standard library xmlrpclib.