How to Url Encode a String in Ruby

How to URL encode a string in Ruby

str = "\x12\x34\x56\x78\x9a\xbc\xde\xf1\x23\x45\x67\x89\xab\xcd\xef\x12\x34\x56\x78\x9a".force_encoding('ASCII-8BIT')
puts CGI.escape str


=> "%124Vx%9A%BC%DE%F1%23Eg%89%AB%CD%EF%124Vx%9A"

Ruby - URL encoding

What about CGI::escape

You need to only encode the parameters though.

url = "http://xyz.com/hello?"
params = "name=john&msg=hello\nJohn\n\rgoodmorning¬e=last\night I went to \roger"

puts "#{url}#{CGI::escape(params)}"
# => "http://xyz.com/hello?name%3Djohn%26msg%3Dhello%0AJohn%0A%0Dgoodmorning%26note%3Dlast%0Aight+I+went+to+%0Doger"

Parsing string to add to URL-encoded URL

In 2019, URI.encode is obsolete and should not be used.

---

require 'uri'

URI.encode("Hello there world")
#=> "Hello%20there%20world"
URI.encode("hello there: world, how are you")
#=> "hello%20there:%20world,%20how%20are%20you"

URI.decode("Hello%20there%20world")
#=> "Hello there world"

Simple cipher to encode URL

Use Base64 urlsafe_encode64

Base64 is a good idea to use, Ruby provides URL safe implementation of it, because the default will produce characters like + and =. urlsafe_encode64 will use '-' instead of '+' and '_' instead of '+' so they can be passed like URL parameters.

require "base64"

encoded_url = Base64.urlsafe_encode64('http://www.someurl.com', ) #=> "aHR0cDovL3d3dy5zb21ldXJsLmNvbQ=="
decoded_url = Base64.urlsafe_decode64(encoded_url) #=> "http://www.someurl.com"

Ruby equivalent to PHPs urlencode

Ruby uses UTF-8 strings by default:

str = 'ö'

str.encoding
#=> #<Encoding:UTF-8>

If you want an ISO 8859 encoded string in Ruby, you have to convert it:

str.encode('ISO-8859-1')
#=> "\xF6"

to URL-encode a string, there's CGI.escape:

require 'cgi'

CGI.escape(str.encode('ISO-8859-1'))
#=> "%F6"

to encode an URL, use URI.escape:

require 'uri'

url = 'http://example.com/this/is/an/ö'
URI.escape(url.encode('ISO-8859-1'))
#=> "http://example.com/this/is/an/%F6"

Is there a function to url encode dot ('.') in ruby

You actually don't need to encode the dot. After the ? in the url, / and . don't have any specific meaning.

Converting url encoded strings into plain text with ruby

You can use CGI::unescape for URL-decoding:

require 'cgi'
string = CGI::unescape("1+%2B+2+%3D+3")
#=> "1 + 2 = 3"

Turning a json string into a URL encoded string (Rails)

Sure you can use the uri library shown here

[2] pry(main)> require 'uri'
=> true
[3] pry(main)> URI.encode('{"email":"name@gmail.com"}')
=> "%7B%22email%22:%22name@gmail.com%22%7D"

Ruby - how to encode URL without re-encoding already encoded characters

I can't think of a way to do this that isn't a little bit of a kludge. So I propose a little bit of a kludge.

URI.escape appears to work the way you want in all cases except when characters are already encoded. With that in mind we can take the result of URI.encode and use String#gsub to "un-encode" only those characters.

The below regular expression looks for %25 (an encoded %) followed by two hex digits, turning e.g. %252f back into %2f:

require "uri"

DOUBLE_ESCAPED_EXPR = /%25([0-9a-f]{2})/i

def escape_uri(uri)
  URI.encode(uri).gsub(DOUBLE_ESCAPED_EXPR, '%\1')
end

puts escape_uri("https://www.example.com/url-déjà-vu")
# => https://www.example.com/url-d%C3%A9j%C3%A0-vu

puts escape_uri("https://somesite.com/page?stuff=stuff&%20")
# => https://somesite.com/page?stuff=stuff&%20

puts escape_uri("http://example.com/a%2fb")
# => http://example.com/a%2fb

I don't promise that this is foolproof, but hopefully it helps.

url encode equivalent in ruby on rails

I believe the u helper method is what you're looking for:

<%=u "URL ENCODE 
ME
" %>

I can't seem to find the documentation for that method, but if I find it in the near future I'll be sure to put a link in here.

Edit: You can find the documentation for this method here.

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