Grab melbourne weather

--requires packages
-- lua-socket--
-- loads the HTTP module and any libraries it requires
local ftp = require("socket.ftp")
local body, head = ftp.get("ftp://ftp2.bom.gov.au/anon/gen/fwo/IDA00003.dat")
local format = ""
--converts string to lines
function magiclines(s)
    if s:sub(-1)~="\n" then s=s.."\n" end
        return s:gmatch("(.-)\n")
end

function createWeatherTable(s)
    local datatable = {}
    local keys = {}
    --generate temporary format table
    local i = 0
    for value in string.gmatch(format, '([^#]+)') do
        keys[i] = value
        i = i + 1
    end
    i = 0
    for value in string.gmatch(s, '([^#]+)') do
        if((string.match(keys[i], "max") or string.match(keys[i], "min")) and tonumber(value) == nil ) then
            datatable[keys[i]] = " "
            i = i + 1
        else
        --replace i with value from other table
        datatable[keys[i]] = value
        --basic output
        print(keys[i]..": "..datatable[keys[i]])
        i = i + 1
        end
    end

end

--main
local i = true;
for line in magiclines(body) do
    --grab the first line
    if(i) then
        i = false
        format = line
    end
    --print values
    if string.match(line, "Melbourne") then
        createWeatherTable(line)
        break
    end
end