How to encode bytes to utf8 in lua?

Question

The string which is decompressed by zlib and been printed to log is in the format of below.

 {\x22uid\x22:\x22CE57134D17B57E873D7E7434E0E21783\x22.............2\x5Cu0000\x5Cu0000\x22,\x22http://tgs.7477.com/adiframe/ky/01/index.html\x5Cu0000\x5Cu0000\x22,\x22http://s.csbew.com/acookie.html\x5Cu0000\x5Cu0000\x22],\x22ver\x22:\x221\x22}\x0A200

How to encode the decompressed str so that it displays without something like '\xxx \u000' in lua?

It's not clear what you mean by "looks like normal". It's also not clear on what that blob of text means. — Nicol Bolas, Jul 05 '17 at 15:50
It does look quite normal already, with only double quotes sign escaped as \x22. Full text would be `"uid:CE57134D17B57E873D7E7434E0E21783"`. That hex doesn't require any further decoding because it's some unique id. — Vlad, Jul 05 '17 at 17:07
I re-edit the question, hope this time it will make it clear. — newbie, Jul 06 '17 at 01:35

Mike V. · Answer 1 · 2017-07-06T15:00:01.303

Try this unescape function to get characters from the hexadecimal representation:

    function unescape (s)
        s = string.gsub(s or '', "\\x(%x%x)", function (h) return string.char(tonumber(h,16)) end)
        return s
    end


    local str = [[{\x22uid\x22:\x22CE57134D17B57E873D7E7434E0E21783\x22.............2\x5Cu0000\x5Cu0000\x22,\x22http://tgs.7477.com/adiframe/ky/01/index.html\x5Cu0000\x5Cu0000\x22,\x22http://s.csbew.com/acookie.html\x5Cu0000\x5Cu0000\x22],\x22ver\x22:\x221\x22}\x0A200 ]]
    print( unescape(str) )

Result:

 {"uid":"CE57134D17B57E873D7E7434E0E21783".............2\u0000\u0000","http://tgs.7477.com/adiframe/ky/01/index.html\u0000\u0000","http://s.csbew.com/acookie.html\u0000\u0000"],"ver":"1"}
200

How to encode bytes to utf8 in lua?

1 Answers1