get-pocket-access-token.rb

# https://getpocket.com/developer/docs/authentication

require 'net/http'
require 'uri'

def usage
  puts <<USAGE
Usage:
  $ ruby #{$0} <consumer_key>
USAGE
end

consumer_key = ARGV.first
unless consumer_key
  usage
  exit!
end

uri = URI.parse('https://getpocket.com/v3/oauth/request')
params = {
  'consumer_key' => consumer_key,
  'redirect_uri' => 'http://example.com/',
}
res = Net::HTTP.post_form(uri, params)
if res.code != '200'
  puts res.body
  exit!
end
query = Hash[URI.decode_www_form(res.body)]
code = query['code']

url = "https://getpocket.com/auth/authorize?request_token=#{code}&redirect_uri=http://example.com/"
system("open #{url}")

puts "Press any key if you have authenticated: "
STDIN.gets

uri = URI.parse('https://getpocket.com/v3/oauth/authorize')
params = {
  'consumer_key' => consumer_key,
  'code' => code,
}
res = Net::HTTP.post_form(uri, params)
pp Hash[URI.decode_www_form(res.body)]