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Calvin Yu

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URI Encoding In Ruby

01.21.2006

| 75262 views |

        To encode the web parameters for a URL query string.

require 'uri'
val = URI.escape("my parameter value")

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Snippets Manager replied on Thu, 2008/04/10 - 5:48am


uri_good = URI.escape(foo, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))
cgi_good = CGI.escape(foo)
puts uri_good == cgi_good # => true

That's not really true. Try to put a space into url - URI escapes them as "%20", CGI escapes them as "+"

Snippets Manager replied on Wed, 2007/11/28 - 1:07pm

Or you can fully escape the URI using CGI:


require 'uri'
require 'cgi'

foo = "http://google.com?query=hello"

uri_good = URI.escape(foo, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))
cgi_good = CGI.escape(foo)

puts uri_good == cgi_good # => true

Snippets Manager replied on Thu, 2006/10/05 - 6:41pm

To _fully_ escape a URI, you'll have to do this:


require 'uri'
val = URI.escape("abc&efg?hijk", Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))

Otherwise if you are trying to escape a value that contains a URI, the URI value won't be cnoded. For example:


require 'uri'
foo = "http://google.com?query=hello"

bad = URI.escape(foo)
good = URI.escape(foo, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))

bad_uri = "http://mysite.com?service=#{bad}&bar=blah"
good_uri = "http://mysite.com?service=#{good}&bar=blah"

puts bad_uri
# outputs "http://mysite.com?service=http://google.com?query=hello&bar=blah"

puts good_uri
# outputs "http://mysite.com?service=http%3A%2F%2Fgoogle.com%3Fquery%3Dhello&bar=blah"