How to get a specific value from url in ruby on rails

Question

i am trying to get a value of "token" from this url

token=EC-6HV41821M6960550G

url = "https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-6HV41821M6960550G"

i know it can be done by regex but i think it can be done by some URI method.

Look into the `URI` class. You can't do it in a single step. You have to combine a few. — sawa, Aug 31 '14 at 10:16

score 4 · Accepted Answer · answered Aug 31 '14 at 10:39

4

Do can get it like this:

require 'uri'

url = "https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-xxx"

uri    = URI.parse(url)
params = CGI::parse(uri.query)

params['token'] # => 'EC-xxx'

answered Aug 31 '14 at 10:39

spickermann

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Thanx it really worked!! you saved me from lot of regex.. – Bloomberg Aug 31 '14 at 10:41

score 2 · Answer 2 · answered Aug 31 '14 at 15:54

Just to show, some other ways also exist :-

#!/usr/bin/env ruby

require 'uri'

url = "https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-xxx"
uri = URI(url)
URI.decode_www_form(uri.query).to_h['token']
# => "EC-xxx"

Read the method ::decode_www_form docomentation.

score 0 · Answer 3 · edited Aug 31 '14 at 10:44

0

require 'cgi'

url = 'https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=EC-6HV41821M6960550G'

CGI.parse(url)['token']

edited Aug 31 '14 at 10:44

Igor Guzak

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answered Aug 31 '14 at 10:39

javiyu

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+1 for short version... – Bloomberg Aug 31 '14 at 10:46
1

-1 is does only work for the `token` parameter, but would fail for `cmd`. – spickermann Aug 31 '14 at 10:51
yes, because `CGI.parse` work just with query, and parse it like split by `&` and then by `=`, so instead of `cmd` parameter you will have `https://www.sandbox.paypal.com/cgi-bin/webscr?cmd` – Igor Guzak Aug 31 '14 at 10:54

How to get a specific value from url in ruby on rails

3 Answers3