mod_rewrite force lowercase urls

i've searched the net for an answer to my problem without any luck, so her goes:

I'm redoing my mod_rewrite for SEO purposes and i want all urls to be lowercase, for instance:

http://BLAbla.com/

becomes

http://bla.com/

currently my .htaccess looks like this:

RewriteEngine on 

RewriteMap  lc int:tolower
RewriteCond %{REQUEST_URI} [A-Z]
RewriteRule (.*) ${lc:$1} [R=301,L]

RewriteCond %{HTTP_HOST} ^example\.com$ [NC]  
RewriteRule (.*)$ http://www.example.com/$1 [R=301,L]

RewriteRule ([\w]*)/$ http://%{HTTP_HOST}/$1 [R=301,L]

RewriteRule ^([^/]+)/([^/]?)$ index.php?worker=$1&params=$2 [L]

but when i run http://localhost/site/ i get error 500. I only know basic reg开发者_StackOverflow ex, and very limited mod_rewrite, so i cannot se the error here. If i remove the rewritemap line, the page doesn't give any error. Is rewritemap not supported by my server or something??

Any other comments regarding the .htaccess file are very very welcome :)

Thanks for your time.

@Esben

Rewriting the hostname is a bit trickier. Do you have access to the server error log? Because that may some using information about the cause of the 500.

It's a good idea to enclose the parameters in quotation marks just for clarity:

RewriteMap  lc int:tolower
RewriteCond "%{REQUEST_URI}" "[A-Z]"
RewriteRule "(.*)"           "${lc:$1}" [R=301,L]

The [L] is going to force this to end processing for this request, which means that if there's more work to be done to the URI, it'll happen when the request is re-submitted. You might want to consider batching your modifications so requests only go through the munging process once:

RewriteMap  lc int:tolower
RewriteCond "%{REQUEST_URI}" "[A-Z]"
RewriteRule "(.*)"           "${lc:$1}" [E=REDIRECT:TRUE]

RewriteCond "%{HTTP_HOST}"   "!^www\."  [NC]
RewriteRule "^"              "-"        [E=REDIRECT:TRUE,E=PREFIX_WWW:TRUE]

What is the following trying to do?

RewriteRule ([\w]*)/$ http://%{HTTP_HOST}/$1 [R=301,L]

The effect (despite the funky regex) is 'If the REQUEST_URI ends in a '/', strip it off and redirect.' Is that what you want? Bear in mind that things are a little different in a .htaccess file..

And this:

RewriteRule ^([^/]+)/([^/]?)$ index.php?worker=$1&params=$2 [L]

It looks like you're trying to say 'Change any "foo/bar" into "index.php?worker=foo&params=bar"'. If that's correct, it's probably not going to work. Since you're in a .htaccess file, you're matching against the filesystem path, not the URI.

So try this:

RewriteMap  "lc"                 "int:tolower"

RewriteCond "%{REQUEST_URI}"     "[A-Z]"
RewriteRule "(.*)"               "${lc:$1}" [E=REDIRECT:TRUE]

RewriteCond "%{HTTP_HOST}"       "!^www\."  [NC]
RewriteRule "^"                  "-"         [E=REDIRECT:TRUE,E=PREFIX_WWW:TRUE]

RewriteCond "${ENV:REDIRECT}"    "!TRUE"
RewriteRule "^"                  "-"        [SKIP=2]
RewriteCond "${ENV:PREFIX_WWW}"  "TRUE"
RewriteRule "(.*)"               "http://www.${HTTP_HOST}/$1"     [R=301,L]
RewriteRule "^"                  "-"                               [R=301,L]

RewriteRule "^([^/]+)/([^/]?)$"  "index.php?worker=$1&params=$2" [PT]

I'm not sure about the effect of SKIP on RewriteCond statements mixed with RewriteRules, but give the above a try and see if you're any closer.