Questions[mod-rewrite](server)

I'm setting up an environment for wordpress on apache2, on a fresh install of ubuntu 12.04.

In order to get friendly URLS working, I'm trying to set up mod_rewrite. I followed some instructions I found on the net, and used a2enmod.

Now. after restarting apache, I'd like to check if the module is actually loaded.

The command that I've found for getting a list of loaded modules is this:

apache2 -t -D DUMP_MODULES

However, this returns an error:

apache2: bad user name ${APACHE_RUN_USER}

So, how do I actually list all loaded modules, or otherwise check to see if mod_rewrite has been enabled?

I have a bunch of rewrite rules that I have to port from apache to nginx.

It's a rather painful process because I'm not able to see if my rewrite rules and "if" conditions are working as I want them to.

Apache did have debugging for its rewrite module. Whats can I do for nginx?

I'm attempting to implement cross-domain HTTP access control without touching any code.

I've got my Apache(2) server returning the correct Access Control headers with this block:

Header set Access-Control-Allow-Origin "*"                   
Header set Access-Control-Allow-Methods "POST, GET, OPTIONS" 

I now need to prevent Apache from executing my code when the browser sends a HTTP OPTIONS request (it's stored in the REQUEST_METHOD environment variable), returning 200 OK.

How can I configure Apache to respond "200 OK" when the request method is OPTIONS?

I've tried this mod_rewrite block, but the Access Control headers are lost.

RewriteEngine On                  
RewriteCond %{REQUEST_METHOD} OPTIONS 
RewriteRule ^(.*)$ $1 [R=200,L]       

This is a Canonical Question about Apache's mod_rewrite.

Changing a request URL or redirecting users to a different URL than the one they originally requested is done using mod_rewrite. This includes such things as:

• Changing HTTP to HTTPS (or the other way around)
• Changing a request to a page which no longer exist to a new replacement.
• Modifying a URL format (such as ?id=3433 to /id/3433 )
• Presenting a different page based on the browser, based on the referrer, based on anything possible under the moon and sun.
• Anything you want to mess around with URL

Everything You Ever Wanted to Know about Mod_Rewrite Rules but Were Afraid to Ask!

How can I become an expert at writing mod_rewrite rules?

• What is the fundamental format and structure of mod_rewrite rules?
• What form/flavor of regular expressions do I need to have a solid grasp of?
• What are the most common mistakes/pitfalls when writing rewrite rules?
• What is a good method for testing and verifying mod_rewrite rules?
• Are there SEO or performance implications of mod_rewrite rules I should be aware of?
• Are there common situations where mod_rewrite might seem like the right tool for the job but isn't?
• What are some common examples?

A place to test your rules

The htaccess tester web site is a great place to play around with your rules and test them. It even shows the debug output so you can see what matched and what did not.

I have a dedicated server with Apache, on which I've set up some VirtualHosts. I've set up one to handle the www domain as well as the non-www domain.

My VH .conf file for the www:

<VirtualHost *>
  DocumentRoot /var/www/site
  ServerName www.example.com
  <Directory "/var/www/site">
    allow from all
  </Directory>
</VirtualHost>

With this .htaccess:

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

Is there a simple way to redirect the www to the non-www version? Currently I'm sending both versions to the same DocumentRoot and using .htaccess but I'm sure I must be able to do it in the VirtualHost file.