first version

.gitignore

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+*.gem

example.rb

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+require 'json'
+require 'time'
+require 'openexchangerates'
+
+currency = OpenExchange.new('586ee899f7eb4f79861589a1f00a8630')
+cur = JSON.parse(currency.get_latest)
+
+cur_show = 'RUB'
+
+puts "Latest update: #{Time.at(cur['timestamp'])}"
+puts "1 USD = #{cur['rates'][cur_show]} \
+(#{JSON.parse(currency.get_currencies)[cur_show]})"

lib/openexchangerates.rb

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+require 'open-uri'
+
+class OpenExchange
+  @@url = 'http://openexchangerates.org/api/'
+
+  def initialize(api_key)
+    @api_key = api_key
+    @user_agent = "Ruby/#{RUBY_VERSION}"
+  end
+
+  def set_userAgent(user_agent)
+    @user_agent = user_agent
+  end
+
+  def get_latest()
+    json = open("#{@@url}latest.json?app_id=#{@api_key}",
+      'User-Agent' => @user_agent).read
+    return json
+  end
+
+  def get_old(date) # YYYY-MM-DD
+    json = open("#{@@url}historical/#{date}.json?app_id=#{@api_key}",
+      'User-Agent' => @user_agent).read
+  end
+
+  def get_currencies()
+    json = open("#{@@url}currencies.json?app_id=#{@api_key}",
+      'User-Agent' => @user_agent).read
+    return json
+  end
+end

openexchangerates.gemspec

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+Gem::Specification.new do |s|
+  s.name        = 'openexchangerates'
+  s.version     = '0.0.1'
+  s.date        = '2012-12-06'
+  s.summary     = 'Implementation API openexchangerates.org on Ruby'
+  s.description = 'Implementation API openexchangerates.org on Ruby'
+  s.authors     = ['Alexander Popov']
+  s.email       = ['iiiypuk@iiiypuk.me']
+  s.homepage    = 'https://github.com/IIIypuk/openexchangerates'
+  s.license     = 'MIT'
+
+  s.files         = `git ls-files`.split("\n")
+  s.require_paths = ["lib"]
+end