The URL Rewrite Engine provides a subset of the Apache mod_rewrite module. For more information, refer to http://httpd.apache.org/docs/2.0/mod/mod_rewrite.html and http://httpd.apache.org/docs/2.0/misc/rewriteguide.html.

DWebPro supports the following directives:

• RewriteBase Path

• RewriteCond TestString CondPattern [Flags]

• RewriteRule Pattern Substitution [Flags]

The RewriteCond CondPattern field and the RewriteRule Substitution field can include the following variables:

All of these should be structured as %{NAME_OF_VARIABLE}.

The RewriteCond CondPattern field can contain a regular expression with the following additions:

• If it starts with the ! character, the result will be inverted.

• The CondPattern field will be treated as a plain string if it starts with one of the following characters: =, >, or <. In addition, it will be applied a lexical comparison against TestString (equal, major, minor).

• If it is equal to -d, TestString will be treated as a path and checked to ensure it exists and is a folder.

• If it is equal to -f, TestString will be treated as a path and checked to ensure it exists and is a file.

• If it is equal to -s, TestString will be treated as a path and checked to ensure it exists and is a file with a size greater than 0 bytes.

The RewriteCond directive supports the following flags:

• NC

• OR

These flags are handled in the same manner as in Apache. The RewriteRule Pattern field contains a regular expression that will be applied to the DocumentPath of the current HTTP request.

The RewriteRule Substitution field can contain a back-reference, such as $N con 0 <= N <= 9.

The RewriteRule directive supports the following flags:

• L

• NC

• R

• QSA

These flags are handled in the same manner as they are in Apache.

To test your rewrite rules with DWebPro you can use the provided Rewrite Engine Tester tool, which is located under the DWebPro Utilities Program Group.

The DWebPro Rewrite Engine Tester Software