Hi, I receive a String allowing hexadecimal escaping by using %XX syntax:
%61lice => alice ( %61 == a )
I would like to un-escape the string. I've got it using "eval" but I'd prefer
avoiding using "eval":
string = "%61lice"
string = eval %{ "#{ string.gsub(/%/,'\x') }" }
=> "alice"
How could I avoid the usage of "eval" to un-escape the string?
Thanks a lot.
--
Iñaki Baz Castillo
Ops, it is easier than above. CGI lib already does it:
require 'cgi'
CGI.unescape("%61lice")
=> "alice"
El Viernes, 20 de Febrero de 2009, Iñaki Baz Castillo escribió:
Hi, I receive a String allowing hexadecimal escaping by using %XX syntax:
%61lice => alice ( %61 == a )
I would like to un-escape the string. I've got it using "eval" but I'd
prefer avoiding using "eval":string = "%61lice"
string = eval %{ "#{ string.gsub(/%/,'\x') }" }
=> "alice"How could I avoid the usage of "eval" to un-escape the string?
--
Iñaki Baz Castillo
Iñaki Baz Castillo wrote:
string = "%61lice"
string = eval %{ "#{ string.gsub(/%/,'\x') }" }
=> "alice"How could I avoid the usage of "eval" to un-escape the string?
s.gsub! /%(\d+)/ do |match|
$1.to_i(16).chr
end
puts s
You might also consider supporting escaped % literals.
It fails since it should be:
s.gsub! /%(\d\d)/ do |match|
$1.to_i(16).chr
end
Without this change it would fail when matching:
"%61123"
But fixing it then it works well, thanks a lot
El Viernes, 20 de Febrero de 2009, Jeff Schwab escribió:
Iñaki Baz Castillo wrote:
> string = "%61lice"
> string = eval %{ "#{ string.gsub(/%/,'\x') }" }
> => "alice"
>
> How could I avoid the usage of "eval" to un-escape the string?s.gsub! /%(\d+)/ do |match|
$1.to_i(16).chr
end
puts sYou might also consider supporting escaped % literals.
--
Iñaki Baz Castillo
Also, it should consider not just number but A-F
El Viernes, 20 de Febrero de 2009, Jeff Schwab escribió:
Iñaki Baz Castillo wrote:
> string = "%61lice"
> string = eval %{ "#{ string.gsub(/%/,'\x') }" }
> => "alice"
>
> How could I avoid the usage of "eval" to un-escape the string?s.gsub! /%(\d+)/ do |match|
$1.to_i(16).chr
end
puts sYou might also consider supporting escaped % literals.
--
Iñaki Baz Castillo
Iñaki Baz Castillo wrote:
El Viernes, 20 de Febrero de 2009, Jeff Schwab escribió:
Iñaki Baz Castillo wrote:
string = "%61lice"
string = eval %{ "#{ string.gsub(/%/,'\x') }" }
=> "alice"How could I avoid the usage of "eval" to un-escape the string?
s.gsub! /%(\d+)/ do |match|
$1.to_i(16).chr
end
puts sYou might also consider supporting escaped % literals.
Also, it should consider not just number but A-F
Right you are.
Iñaki Baz Castillo wrote:
El Viernes, 20 de Febrero de 2009, Jeff Schwab escribió:
puts s
You might also consider supporting escaped % literals.
Also, it should consider not just number but A-F
s = "%4Flice"
s.gsub! /%([\da-fA-F][\da-fA-F])/ { $1.to_i(16).chr }
puts s
--
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Igor Pirnovar wrote:
Iñaki Baz Castillo wrote:
puts s
You might also consider supporting escaped % literals.
Also, it should consider not just number but A-F
s = "%4Flice"
s.gsub! /%([\da-fA-F][\da-fA-F])/ { $1.to_i(16).chr }
puts s
SyntaxError: compile error
(irb):2: syntax error, unexpected '{', expecting $end
s.gsub! /%([\da-fA-F][\da-fA-F])/ { $1.to_i(16).chr }
^
El Viernes, 20 de Febrero de 2009, Jeff Schwab escribió:
Jeff Schwab wrote:
SyntaxError: compile error
(irb):2: syntax error, unexpected '{', expecting $end
s.gsub! /%([\da-fA-F][\da-fA-F])/ { $1.to_i(16).chr }
^
Sorry, in Ruby 1.9 this is no longer a Syntax Error
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