ruby/rails equivalent to javascript decodeURIComponent?

Question

I have some content (html) that is being encoded as a result of this javascript (from this page) and sent to my rails application:

function encode_utf8_b64(string) {
return window.btoa(unescape(encodeURIComponent(string)));
}

The correspond js code to get it back to original is this:

function decode_utf8_b64(string) {
return decodeURIComponent(escape(window.atob(string)));
}

My question is, is there an equivalent in ruby of decodeURIComponent()? So far I have this that gets it part of the way out, but I'm missing the last step of decodeURIComponent:

CGI::escape(Base64.decode64(string))

olistik · Accepted Answer · 2011-06-24 06:58:59Z

19

URI.unescape could probably help:

def decode_utf8_b64(string)
  URI.unescape(CGI::escape(Base64.decode64(string)))
end

you have to add the necessary rubygem too:

require 'uri'

I've tested this on ruby 1.9.2.

edited Jun 24, 2011 at 6:58

answered Jun 23, 2011 at 17:17

olistik

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1 Comment

bobfet1 Over a year ago

thanks - when I apply URI.unescape or URI.decode, I get an "invalid byte sequence in UTF-8" error. It seems that the output of the CGI::escape() is US-ASCII. When I tried to use Iconv to convert the string to UTF-8 before applying URI.unescape, it stopped throwing the error but seemed to just remove one of the deencoding steps so the output was still a mess. Any tips? Or maybe this is a separate issue.

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