Best way to extract last segment of URI in Ruby

Question

Given URI strings like:

http://www.somesite.com/abc
http://www.somesite.com/alpha/beta/abc
http://www.somesite.com/alpha/abc

What's the most elegant way in Ruby to grab the abc at the end of these URIs?

Hocus

@oldergod: http://example.com/where?is=pancakes/house%3F. – Augustineaugustinian

@muistooshort how would you do it? taking everything from the last / before the first ?? – Chiquita

@oldergod: yeah, see Gumbo's answer. – Augustineaugustinian

Answer 1

I would use a proper URI parser like the one of the URI module to get the path from the URI. Then split it at / and get the last part of it:

require 'uri'

URI(uri).path.split('/').last

Electrosurgery

@Chiquita So what do you get instead? – Electrosurgery

@muistooshort You can use path.chomp('/') to remove them before splitting. – Electrosurgery

Answer 2

uri.split('/')[-1] 

or

uri.split('/').last 

Barahona

Answer 3

While all the usages of split suggested in the answers here are legit, in my opinion @matsko's answer is the one with the clearer code to read:

last = File.basename(url)

Albertinealbertite

Answer 4

Try these:

if url =~ /\/(.+?)$/
  last = $1
end

Or

last = File.basename(url)

Veranda

Answer 5

From the Terminal command line:

ruby -ruri -e "print File.basename(URI.parse('$URI').path)"

from inside your .rb source:

require 'uri'
theURI = 'http://user:[email protected]/foo/bar/baz/?lala=foo'
uriPathTail = File.basename(URI.parse(theURI).path) # => baz

it works well with whatever legal theURI you had.

If you don't use URI.parse(), any parameter to the url will be wrongly taken as the last segment of the URI.

Akilahakili

Answer 6

If the value is any orbitary string + URI, then the below solution should work.

First, extract URI from the string:

uri_string = URI.extract("Test 123 http://www.somesite.com/abc")

Above command returns an array

Then extract the last part of the URI using

uri_string[0].split('/').last

prerequisite: require "uri" needs to be added to the ruby script

Victualler