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local function encode (str)
str = string.gsub (str, "([^0-9a-zA-Z !'()*._~-])", -- locale independent
function (c) return string.format ("%%%02X", string.byte(c)) end)
str = string.gsub (str, " ", "%%20")
return str
end
local function decode (str)
str = string.gsub (str, "%%20", " ")
str = string.gsub (str, "%%(%x%x)", function(h) return string.char(tonumber(h,16)) end)
return str
end
return {
encode = encode,
decode = decode
}
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