NGINX let module

Adds support for arithmetic operations to NGINX config.

(c) 2011 Roman Arutyunyan, [email protected]

Build:

Add this when configuring NGNIX:

./configure --add-module=$PATH_TO_MODULE

Examples:

adds variable $value equal to evaluated expression value

let $value ( $uid + 0x12 ) * $offset - 100 ;

let $remainer $number % 100 ;

let $welcome "Hi, " . $user . ", you have " . $num . " data items";

echo $welcome ;

let_rand $randval from to;

IMPORTANT NOTE:

let-module uses NGINX config parser as lexer. That means you should add spaces around each token.

let $value (1+2); # ERROR! let $value ( 1 + 2 ); # OK

let $value 1 + (2 * $uid); # ERROR! let $value 1 + ( 2 * $uid ); # OK

Features supported:

• operations with unsigned integers:

  • • • / %

• string operations:

  . (concatenation)

• hexadecimal numbers

• grouping with parentheses

Notes:

Use the following command to rebuild parser generator if you need that

bison -d let.y