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My goal is that requests for /foobar?key=123 should redirect to /download/foobar.html?key=123.

I currently use the following code to accomplish this:

location /foobar {
  rewrite ^/foobar(.*)$ /download/foobar.html$1 permanent;

This does the trick, but we have some old code that also calls /FooBar?key=123 and /Foobar?key=123 which ignores the rewrite rule.

How can I get these to rewrite too? Could use:

location ~* ^/foobar {
  rewrite ^ /download/foobar.html$1 permanent;

but isn't this a bit loose of a rule?

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up vote 4 down vote accepted

First off, location is case sensitive by default; location ~* ^/foobar$ will fix this.

For the rewrite, it's always case sensitive, but you can make your expression match both forms:

rewrite ^/[Ff]oo[Bb]ar(.*)$ /download/foobar.html$1 permanent;
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I think without the ^/foobar it could erroneously match somewhere else, like /images/foobar12.png. Or does the rewrite ^/[Ff]... take care of that? – jimg Sep 19 '11 at 21:55
@jimg Indeed it will. And without a trailing $, it'll also catch /foobars, so we'll add that, too (location doesn't look at the query params, so this will work just fine in your case). Yes, the string limiting in the rewrite takes care of that - but if all you're doing in that location block is the rewrite, then you can probably just get rid of the location completely. – Shane Madden Sep 19 '11 at 22:02
Thanks for the update Shane. so you would suggest just placing it in the location / block to simplify? Isn't it better to split off rewrites into their own block for performance reasons? – jimg Sep 19 '11 at 22:15
@jimg Since there'd be a regex match needed for the location anyway, the performance impact to evaluating the rewrite for every request is a minimal increase. – Shane Madden Sep 19 '11 at 22:24

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