Rails - Jun 2005 - url_decode

Sometimes, I find the need to decode url encoded strings.  I was
surprised not to find anything for that in erb.rb, so I added it to my
code.  It''s useful enough that I''m sharing.

It would be nice if ruby had \x for matching a hex digit, instead of
the ugly [A-F\d] I''m using.

def url_decode(s)
     s.to_s.gsub(/%([A-F\d]{2})/in) { [$1.hex].pack(''C'') }
end


-- 
Justin Dossey

jbd-ARXITx83Qt49fbuuu1rVSg@public.gmane.org wrote:
> def url_decode(s)
>     s.to_s.gsub(/%([A-F\d]{2})/in) { [$1.hex].pack(''C'') }
> end

See CGI.unescape

> It would be nice if ruby had \x for matching a hex digit, instead of
> the ugly [A-F\d] I''m using.
> 
> def url_decode(s)
>     s.to_s.gsub(/%([A-F\d]{2})/in) { [$1.hex].pack(''C'') }
> end
[:xdigit:] should match a hex digit (POSIX regex)

Michale

See CGI#unescape