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Got some fresh .htaccess and mod_rewrite code for you! Check out the Cookie Manipulation and Tests using mod_rewrite! Also see how to set environment variables and then use them to send custom Headers (like content-language) and Rewrite based on them. And a couple Mod_Security .htaccess examples, for those smart enough to run onDreamHost. Enjoy!

• Mod_Rewrite .htaccess Examples
• Cookie Manipulation and Tests with mod_rewrite
• Setting Environment Variables
• Using the Environment Variable
• Mod_Security .htaccess Examples

Mod_Rewrite .htaccess Examples ^

Redirect Request ending in .html/ to .html ^

RewriteEngine On
RewriteBase /
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /(.+)\.html/\ HTTP/
RewriteRule ^(.+)\.html/$ http://www.askapache.com/$1.html [R=301,L]

Or a lower quality alternative ^

RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_URI} ^[^\.]+\.html/$
RewriteRule ^(.*)\.html.*$ http://www.askapache.com/$1.html [R=301,L]

Redirect All Feeds to Feedburner's MyBrand ^

RewriteEngine On
RewriteBase /
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /(feed|wp-atom|wp-feed|wp-rss|wp-rdf|wp-commentsrss)(.*)\ HTTP/ [NC,OR]
RewriteCond %{QUERY_STRING} ^feed [NC]
RewriteCond %{HTTP_USER_AGENT} !^(FeedBurner|FeedValidator|talkr) [NC]
RewriteRule .* http://feeds.askapache.com/apache/htaccess? [R=307,L]

Cookie Manipulation and Tests with mod_rewrite ^

Set a Cookie based on Requested directory ^

RewriteEngine On
RewriteBase /
RewriteRule ^(.*)(de|es|fr|it|ja|ru|en)/$ - [co=lang:$2:.askapache.com:7200:/]

Get Cookie Value ^

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_COOKIE} lang=([^;]+) [NC]
RewriteRule ^(.*)$ /$1?cookie-value=%1 [R,QSA,L]

Rewrite Based on Cookie Value ^

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_COOKIE} lang=([^;]+) [NC]
RewriteRule ^(.*)$ /$1?lang=%1 [NC,L,QSA]

Redirect If Cookie Not Set ^

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_COOKIE} !^.*cookie-name.*$ [NC]
RewriteRule .* /login-error/set-cookie-first.cgi [NC,L]

Setting Environment Variables ^

Set lang var to Accept-Language Header ^

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP:Accept-Language} ^.*(de|es|fr|it|ja|ru|en).*$ [NC]
RewriteRule ^(.*)$ - [env=lang:%1]

Set lang var to URI ^

RewriteEngine On
RewriteBase /
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /(.+)/(de|es|fr|it|ja|ru|en)/\ HTTP/ [NC]
RewriteRule ^(.*)$ - [env=lang:%2]

Using the Environment Variable ^

Send Content-Language Header based on environment variable ^

Header set Content-Language "%{lang}e" env=lang

Set a Cookie with env variable value only if has value ^

Header set Set-Cookie "language=%{lang}e; path=/;" env=lang

Echo all Headers back! ^

Header echo ^.*

Mod_Security .htaccess Examples ^

Turn OFF mod_security ^

SecFilterEngine Off
SecFilterScanPOST Off

Reject Requests with Status 500 ^

# Reject requests with status 500
SecFilterDefaultAction "deny,log,status:500"