ikiwiki/doc/tips/redirections_for_usedirs.mdwn

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Want to turn on the `usedirs` setting on an existing wiki without breaking
all the links into it?
#Apache and RewriteEngine
Here's a way to do it for Apache, using the
RewriteEngine. This example is for a wiki at the top of a web site, but can
be adapted to other situations.
# pages
RewriteCond $1 !^/~ # these pages
RewriteCond $1 !^/doc/ # are not part of
RewriteCond $1 !^/ajaxterm # the wiki, so
RewriteCond $1 !^/cgi-bin/ # don't rewrite them
RewriteCond $1 !.*/index$
RewriteRule (.+).html$ $1/ [R]
# rss feeds
RewriteCond $1 !^/~
RewriteCond $1 !.*/index$
RewriteRule (.+).rss$ $1/index.rss
# atom feeds
RewriteCond $1 !^/~
RewriteCond $1 !.*/index$
RewriteRule (.+).atom$ $1/index.atom
#lighttpd and mod_redirect
The following example is exactly the same thing written for lighttpd by using mod_redirect:
$HTTP["url"] !~ "^/(~|doc/|ajaxterm|cgi-bin/)" {
$HTTP["url"] !~ "^/(.*/index\.(html|rss|atom))" {
url.redirect = (
"(.*)\.html$" => "$1/",
"(.*)\.(atom|rss)$" => "$1/index.$2"
)
}
}