Rails - Jul 2006 - URI.escape() broken or misdocumented in Ruby 1.8.4

URI.escape() is supposed to be able to take a second parameter listing 
unsafe characters in the URI. This may be a regexp or string. If a 
string, it''s supposed to represent a character set listing all unsafe 
characters. An example given in the core documentation at:

http://www.ruby-doc.org/stdlib/libdoc/uri/rdoc/classes/URI/Escape.html#M008992

...is:

  p URI.escape("@?@!", "!?")
  # => "@%3F@%21"

Unfortunately this doesn''t work. It seems that the string does not 
represent a character set to match any more, but a literal string to 
find - thus the following result is actually seen:

  p URI.escape("@?@!", "!?")
  # => "@?@!"
  p URI.escape("@?@!", "@?")
  # => "%40%3F@!"

Matching strings in this way is thoroughly bizarre as highlighted by the 
above example; "@" is being escaped for the substring "@?"
but not for
the substring "@!". The way to get the documented style of
substitution
is rather clumsy; one must manually construct the character set:

  p URI.escape("@?@!", Regexp.new("[!?]"))
  # => "@%3F@%21"

I was going to update the documentation Wiki to mention the differing 
behaviour in Ruby 1.8.4 by clicking on the link given at the bottom of 
the page, which goes to:

http://www.ruby-doc.org/stdlib/libdoc/uri/rdoc/classes/URI/Escape.html#M008992

...but this gives a blank page. In fact the whole Wiki seems to be a bit 
broken, with little documentation actually apparently existing and the 
search engine failing to find anything at all under "URI". Am I
missing
something here?

-- 
Posted via http://www.ruby-forum.com/.

Andrew Hodgkinson wrote:
>
http://www.ruby-doc.org/stdlib/libdoc/uri/rdoc/classes/URI/Escape.html#M008992
The second time that appeared, it should of course have read:

http://www.ruby-doc.org/ru/wiki/index.rb/Core/URI::Escape

-- 
Posted via http://www.ruby-forum.com/.

For the sake of searchable archives, further information can be found on 
the Ruby list; see:

http://www.ruby-forum.com/topic/72072



-- 
Posted via http://www.ruby-forum.com/.

>  p URI.escape("@?@!", Regexp.new("[!?]"))
>  # => "@%3F@%21"
p URI.escape("@?@!", /[!?]/)
#=> "@%3F@%21"

It may be misdocumented, but why would you use anything other than a  
Regexp here?

_Kevin

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