This is an [XML-RPC] interface for Wikis, so that you can do all sorts of interesting scripting and stuff.  For example, it has been used to do things like:

* [provide an automatic system to send emails when pages change|EmailGenerator]
* [print out all pages of a wiki for inclusion on portable devices|Hula]
* Enable a wiki page to control the configuration of a complicated Python process. This supersedes a process wherein the person desiring changes had to ask an engineer to check out the code and add the info.
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!!API

__Version 1__ API is as follows:

* __array getRecentChanges( Date timestamp )__: Get list of changed pages since ''timestamp'', which should be in UTC.  The result is an array, where each element is a struct:
** ''name'' (string) : Name of the page.  The name is UTF-8 with URL encoding to make it ASCII.
** ''lastModified'' (date) : Date of last modification, in UTC.
** ''author'' (string) : Name of the author (if available).  Again, name is UTF-8 with URL encoding.
** ''version'' (int) : Current version.
* A page MAY be specified multiple times.  A page MAY NOT be specified multiple
  times with the ''same'' modification date.

* __int getRPCVersionSupported()__: Returns 1 with this version of the JSPWiki API.

* __base64 getPage( String pagename )__: Get the raw Wiki text of page, latest version. Page name __must__ be UTF-8, with URL encoding.  Returned value is a binary object, with UTF-8 encoded page data.

* __base64 getPageVersion( String pagename, int version )__: Get the raw Wiki text of page. Returns UTF-8, expects UTF-8 with URL encoding.

* __base64 getPageHTML( String pagename )__: Return page in rendered HTML.  Returns UTF-8, expects UTF-8 with URL encoding.

* __base64 getPageHTMLVersion( String pagename, int version )__: Return page in rendered HTML, UTF-8.

* __array getAllPages()__: Returns a list of all pages.  The result is an array of strings, again UTF-8 in URL encoding.

* __struct getPageInfo( string pagename )__ : returns a struct with elements
** ''name'' (string): the canonical page name, URL-encoded UTF-8.
** ''lastModified'' (date): Last modification date, UTC.
** ''author'' (string): author name, URL-encoded UTF-8.
** ''version'' (int): current version

* __struct getPageInfoVersion( string pagename, int version )__ : returns a
  struct just like plain ''getPageInfo()'', but this time for a specific
  version.

* __array listLinks( string pagename )__: Lists all links for a given page.
  The returned array contains structs, with the following elements:
** ''page'' (string) : The page name or URL the link is to.
** ''type'' (string) : The link type.  This is a string, with the following
   possible values:
*** "external" : The link is an external hyperlink
*** "local" : This is a local Wiki name for hyperlinking
** ''href'' (string) : The HREF the link points to. Useful for finding this link within the HTML of this page.

As you can see, all data is returned in a ''base64'' -type in UTF-8 encoding, regardless of what JSPWiki preference actually is.  Also, all incoming or outcoming strings are really UTF-8, but they have been URL-encoded so that the XML-RPC requirement of ASCII is fulfilled.

The URL is {{http://www.jspwiki.org/RPC2/}} (note the trailing slash). All methods are prepended with wiki. - for example, {{wiki.getAllPages()}}

!Errors

All methods which handle a page in any way can return a Fault.  Current fault
codes are:

* 1 : No such page was found.

!Troubleshooting
You should make sure that XMLRPC is enabled in the deployment descriptor (WEB-INF/web.xml)\\
See comments there.

!JSPWiki specific notes

We also offer a non-spec compliant service at URL:

{{http://www.jspwiki.org/RPCU/}}

The XML-RPC service here is otherwise exactly the same as the one detailed above, except that all
strings are considered to be UTF-8, and all methods that use base64, use strings.  So, if you don't 
want to do any Base64-conversions for strings, just use the UTF-8 API.

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!!Related Code

* A client Java API for this interface can be found at [Hula], as well as some sample apps.
* A project to present this interface on top of existing Wiki's is noted at [Hoop].
* Also, see [EmailGenerator], [http://www.mahlen.org/jspwiki/], and [TouchGraphWikiBrowser]. 

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!!Other implementations
* [OpenWiki]: [http://www.protocol7.com/services/openwiki.asp]
* [TWiki]: [http://www.decafbad.com/twiki/bin/view/Main/XmlRpcToWiki]
* [UseModWiki]: [http://www.decafbad.com/twiki/bin/view/Main/XmlRpcToWiki]
* [MoinMoin]: [http://www.decafbad.com/twiki/bin/view/Main/XmlRpcToWiki]
* [PhpWiki]: [http://phpwiki.sourceforge.net/phpwiki/XmlRpc]

----

!!Related Discussions

* See [WikiRPCInterfaceUTF8VsBase64] for more on UTF-8 issues and time zone stuff.
* See [WikiRPCInterfaceListLinks] for the discussion on the listLinks() method.
* See [WikiRPCInterfaceDiscussion] for generic discussion about this interface.
* See [WikiRPCInterface2] for discussion on the next version of the API.
* [HowWikiComparesToRest|http://internet.conveyor.com/RESTwiki/moin.cgi/HowWikiComparesToRest]
----

please try to coordinate this effort with other wikis, for example have a look at [http://meta.wikimedia.org/w/wiki.phtml?title=Machine-friendly_wiki_interface] and talk to the people there.
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