How do I parse the query portion of a URI in Ruby 1.8?

Question

In Ruby 1.8, using the URI standard library, I can parse

http://au.easyroommate.com/content/common/listing_detail.aspx?code=H123456789012&from=L123456789012345

using URI.split to get

["http", nil, "au.easyroommate.com", nil, nil,
"/content/common/listing_detail.aspx", nil, 
"code=H123456789012&from=L123456789012345", nil]

But is it possible to get the H123456789012 bit from the query portion without using my own hackery (eg splitting by & and then getting the bit that matches /code.(.*)/ ?

score 3 · Accepted Answer · answered Jul 30 '11 at 02:23

3

You're looking for the CGI::parse method

params = CGI::parse("query_string")
  # {"name1" => ["value1", "value2", ...],
  #  "name2" => ["value1", "value2", ...], ... }

answered Jul 30 '11 at 02:23

Maurício Linhares

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score 3 · Answer 2 · answered Jul 30 '11 at 02:24

3

You could use Rack::Utils which has a method called parse_nested_query which you could pass in the query string from the URL:

Rack::Utils.parse_nested_query(uri.query_string)

This will then return a Hash object representing the query string allowing you to gain access to the code.

answered Jul 30 '11 at 02:24

Ryan Bigg

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Turns out Rack is part of the standard library, not a gem. This was a surprise to me. – Andrew Grimm Jul 30 '11 at 02:40
Rack is a gem, it isn't part of Ruby's standard library (and this is a good thing). – Maurício Linhares Jul 30 '11 at 02:42
@Mauricio: You're right. I'd forgotten I had had it installed. – Andrew Grimm Jul 30 '11 at 03:17

How do I parse the query portion of a URI in Ruby 1.8?

2 Answers2