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-- Your script must define the main entry
-- point, as below.
function main()
-- Log something at level 1. Normally you shouldn't be
-- logging anything, especially not at level 1, but this is
-- just to show you can. Useful for debugging.
m.log(1, "Hello world!");
-- Retrieve one variable.
local var1 = m.getvar("REMOTE_ADDR");
-- Retrieve one variable, applying one transformation function.
-- The second parameter is a string.
local var2 = m.getvar("ARGS", "lowercase");
-- Retrieve one variable, applying several transformation functions.
-- The second parameter is now a list. You should note that m.getvar()
-- requires the use of comma to separate collection names from
-- variable names. This is because only one variable is returned.
local var3 = m.getvar("ARGS.p", { "lowercase", "compressWhitespace" } );
-- If you want this rule to match return a string
-- containing the error message. The message must contain the name
-- of the variable where the problem is located.
-- return "Variable ARGS:p looks suspicious!"
-- Otherwise, simply return nil.
return nil;
end
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