suri-nuclear-url.lua

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This lua script can be run standalone and verbosely on a URI with
echo "run()" | lua -i <script name> <URI>

Chris Wakelin
--]]

function init (args)
    local needs = {}
    needs["http.uri"] = tostring(true)
    return needs
end

-- return match via table
function common(a,verbose)
    if verbose == 1 then print("Checking URI " .. a) end

    a = a:gsub("%.%w+$","")
    a = a:gsub("[A-Z_-]","")
    a = a:gsub("^(/%x*)/.*","%1")
    if verbose == 1 then print("URI after stripping is " .. a) end

    if a:find("^/%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x%x$",1,false)  then
        if verbose == 1 then print("URI matches Nuclear pattern") end
        return 1
    end

    return 0
end

-- return match via table
function match(args)
    local t = tostring(args["http.uri"])
    return common(t,0)
end

function run()
  local t = arg[1]
  common(t,1)
end