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+[[!template id=plugin name=pinger author="[[Joey]]"]]
+[[!tag type/special-purpose]]
+
+This plugin allows ikiwiki to be configured to hit a URL each time it
+updates the wiki. One way to use this is in conjunction with the [[pingee]]
+plugin to set up a loosely coupled mirror network, or a branched version of
+a wiki. By pinging the mirror or branch each time the main wiki changes, it
+can be kept up-to-date.
+
+To configure what URLs to ping, use the [[ikiwiki/directive/ping]]
+[[ikiwiki/directive]].
+
+The [[!cpan LWP]] perl module is used for pinging. Or the [[!cpan
+LWPx::ParanoidAgent]] perl module is used if available, for added security.
+Finally, the [[!cpan Crypt::SSLeay]] perl module is needed to support pinging
+"https" urls.
+
+By default the pinger will try to ping a site for 15 seconds before timing
+out. This timeout can be changed by setting the `pinger_timeout`
+configuration setting in the setup file.