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Backwards-compatible Short URL conversion of Mediawiki

2013 07 14

Further adventures in mod_rewrite town! This time I had to convert a Mediawiki install to Short URLs while maintaining backwards compatability. Let's see how it went!

First, if you're like me, you don't plan ahead very much when doing software installs. A Mediawiki site I help with has been running for some time, and several links exist pointing to old, ugly URLs like "www.example.com/wiki/index.php/Main_Page". However, the decision makers wanted the links to lose the "index.php" in the URL!

That's easy enough to do. The Mediawiki meta-wiki has a great write up on the topic. They also link to this handy wizard, which I used.

You should come up with something like this:

RewriteRule ^/?wiki(/.*)?$ %{DOCUMENT_ROOT}/w/index.php [QSA,L]
RewriteRule ^/?$ %{DOCUMENT_ROOT}/w/index.php [QSA,L]

RewriteRule ^/?w/images/thumb/[0-9a-f]/[0-9a-f][0-9a-f]/([^/]+)/([0-9]+)px-.*$ %{DOCUMENT_ROOT}/w/thumb.php?f=$1&width=$2 [L,QSA,B]

RewriteRule ^/?w/images/thumb/archive/[0-9a-f]/[0-9a-f][0-9a-f]/([^/]+)/([0-9]+)px-.*$ %{DOCUMENT_ROOT}/w/thumb.php?f=$1&width=$2&archived=1 [L,QSA,B]

That's all great, but old links won't work anymore! Let's fix that by adding this before all the other new RewriteRules:

RewriteRule ^/?wiki/index.php(/(.*))?$ /wiki/$2 [R=301,L]

Now you should have pretty URLs, and the old-style links should redirect to the new pretty ones too!