Javascript decode =C3=B3 quoted printable

Question

I have search a lot but cant find the solution, i want to decode a word like

Documentaci=C3=B3n => Documentación

in javascript, but i cant.

I tried to convert to utf8 when word is like

Documentaci%C3%B3n

and i can, but never with

that "=" instead of "%".

I take that text from an email if that helps.

Thanks in advance if you can help me, really.

Answer 1

Just replace that '=' with '%':

var str = "Documentaci=C3=B3n";
str = str.replace(/={1}/g, '%');
str = decodeURI(str);

It worked for me: http://jsfiddle.net/5bkpw5kw/1/

UPD1: This is 'quoted-printable' encoding, as can be learned from raw letter. I googled and tried deal of functions, here some of them

• http://phpjs.org/functions/quoted_printable_decode/
• https://github.com/mathiasbynens/quoted-printable/blob/master/src/quoted-printable.js
• https://code.google.com/p/obremsdk/source/browse/trunk/js/quoted-printable.js?r=56

.. and others

I also has taken code snippet from https://mothereff.in/quoted-printable (unbeautified script is embeded into html):

var j = String.fromCharCode;
var a = function(l) {
    return l.replace(/[\t\x20]$/gm, "").replace(/=?(?:\r\n?|\n)/g, "").replace(/=([a-fA-F0-9]{2})/g, function(n, m) {
        var o = parseInt(m, 16);
        return j(o)
    })
};

All of them return me Documentación , but sinse said snippet works fine on mothereff.in I assume all of them are valid. That must be some UTF-8 issue that I haven't still fixed. see this or google

Updated fiddle: http://jsfiddle.net/5bkpw5kw/2/

UPD2: working example by author http://jsfiddle.net/fyoc1bvk/2