From: Marc-Andre Lafortune <ruby-core-mailing-list@...>
Date: 2010-04-10T06:54:05+09:00
Subject: [ruby-core:29401] Re: URI.(un)escape deprecated?

Hi,

Imagine I want to display a url to the user in a human readable format
(say like the status bar of the browser when a user hovers over a
link).

Ruby should have a nice "unescape" for that, and the reverse "escape" too.

These methods should convert
"http://example.com/?name=Marc%20Andr%C3%A9+42" to
"http://example.com/?name=Marc Andr�+42" and back (exactly what Chrome
does)

As the code below shows, the only correct escaping is URI.escape.
The only correct unescaping is WEBrick::HTTPUtils.unescape and
URI.unescape. Note that WEBrick currently raises an error when
escaping...

So unless there is another sensible way to go from URL to human
readable form and back, I recommend not deprecating URI.{un}escape

rubydev -rcgi -ruri -rwebrick/httputils -rerb -e '
# encoding: utf-8
s="http://example.com/?name=Marc Andr�+42"
puts [ "escape:",
ERB::Util.url_encode(s),
CGI.escape(s),
URI.encode_www_form_component(s),
(WEBrick::HTTPUtils.escape_form(s) rescue "fails"),
(WEBrick::HTTPUtils.escape(s) rescue "fails"),
URI.escape(s),
]

s="http://example.com/?name=Marc%20Andr%C3%A9+42"
puts [ "unescape:",
# no equivalent in ERB??,
CGI.unescape(s),
URI.decode_www_form_component(s),
WEBrick::HTTPUtils.unescape_form(s),
WEBrick::HTTPUtils.unescape(s),
URI.unescape(s),
]
'