URL Rewrite

IIS (Windows)

Additional Resources

• URL Rewrite

  http://www.iis.net/downloads/microsoft/url-rewrite

• URL Rewrite Community Forum

  http://forums.iis.net/1152.aspx

ISAPIRewrite (Windows)

Additional Resources

• ISAPI_Rewrite 3

  http://www.helicontech.com/isapi_rewrite/

• ISAPI_Rewrite 3 - Documentation

  http://www.helicontech.com/isapi_rewrite/doc/introduct.htm

Regular Expressions

Testing Tools

Below is a brief list of online tools to create and test regular expressions.

• Regular Expressions 101
  

  https://regex101.com/

• RegExr
  

  http://regexr.com/

• RegexPal
  

  http://regexpal.com/

• Rubular
  

  http://rubular.com

Additional Resources

Below is a list of useful online resource to help you learn and familiarize yourself with regular expressions.

• Regular Expression (Wikipedia)

  https://en.wikipedia.org/wiki/Regular_expression

• Regular Expressions

  http://www.regular-expressions.info/

• Regular Expressions (Mozilla)

  https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions

• JavaScrip RegExp Reference

  http://www.w3schools.com/jsref/jsref_obj_regexp.asp

Common Rewrite Rules

Redirect to www

# Add WWW Prefix
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{HTTP_HOST} ^example\.com [NC]
    RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301,NC]
</IfModule>

Redirect to non-www

# Remove WWW Prefix
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{HTTP_HOST} ^www\.example\.com [NC]
    RewriteRule ^(.*)$ http://example.com/$1 [L,R=301]
</IfModule>

Redirect Single Page

# Redirect page
Redirect 301 /old.html /new.html

Redirect Entire Site

# Redirect entire domain
Redirect 301 / http://www.example.com

Redirect to Different File Extension

# Redirect to new file extension
RedirectMatch 301 (.*)\.html$ http://www.example.com$1.php

Redirect Mobile Users

# Redirect mobile devices
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{HTTP_ACCEPT} "text\/vnd\.wap\.wml|application\/vnd\.wap\.xhtml\+xml" [NC]
    RewriteCond %{REQUEST_URI} ^/$
    RewriteRule ^ http://m.example.com%{REQUEST_URI} [R,L]
</IfModule>

Block IP Addresses

# Block IP addresses
Order Deny,Allow
Deny from 1.2.3.4

Block All Except IP Addresses

# Block all except IP addresses
Order Deny,Allow
Deny from all
Allow from 1.2.3.4

Block Bad Bots

# Block bad bots
<IfModule mod_rewrite.c>
    RewriteEngine On 
    RewriteCond %{HTTP_USER_AGENT} ^Bot [OR]
    RewriteCond %{HTTP_USER_AGENT} ^AnotherBotName
    RewriteRule ^.* - [F,L]
</IfModule>

Application-Specific Rewrite Rules

WordPress

To enable permalinks within WordPress:

1. Login to your WordPress dashboard
2. Hover over Settings on the menu
3. Choose Permalinks from the menu that appears
4. Choose one of the available permalink structures
5. Click the Save Changes button

Linux (.htaccess)

This file is generated by WordPress automatically when Permalinks are enabled using the instructions above. It is provided here for reference.

# Wordpress permalinks
<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    RewriteRule ^index\.php$ - [L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . /index.php [L]
</IfModule>

Windows (web.config)

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <rewrite>
            <rules>
                <rule name="WordPress Permalinks - Homepage" stopProcessing="true">
                    <match url="^index\.php$" />
                    <action type="None" />
                </rule>
                <rule name="WordPress Permalinks - All Requests" stopProcessing="true">
                    <match url=".*" />
                    <conditions>
                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                    </conditions>
                    <action type="Rewrite" url="index.php" />
                </rule>
            </rules>
        </rewrite>
    </system.webServer>
</configuration>