Replace multi_json gem with stdlib JSON.

As of June 2013, multi_json will no longer be maintained.

Gemfile

@@ -6,7 +6,6 @@ gem 'cucumber', '~> 0.7'
 gem 'fakeweb',  '~> 1.2'
 gem 'rspec',    '~> 1.3'
 gem 'mongrel',  '1.2.0.pre2'
-gem 'multi_json', '~> 1.3'
 
 group :development do
   gem 'guard'

README.md

@@ -10,7 +10,8 @@ gem install httparty
 
 ## Requirements
 
-* multi_json and multi_xml
+* Ruby 1.9 or higher
+* multi_xml
 * You like to party!
 
 ## Examples

httparty.gemspec

@@ -12,7 +12,6 @@ Gem::Specification.new do |s|
   s.summary     = %q{Makes http fun! Also, makes consuming restful web services dead easy.}
   s.description = %q{Makes http fun! Also, makes consuming restful web services dead easy.}
 
-  s.add_dependency 'multi_json', "~> 1.0"
   s.add_dependency 'multi_xml', ">= 0.5.2"
 
   s.post_install_message = "When you HTTParty, you must party hard!"

lib/httparty.rb

@@ -4,7 +4,7 @@ require 'net/https'
 require 'uri'
 require 'zlib'
 require 'multi_xml'
-require 'multi_json'
+require 'json'
 
 require 'httparty/module_inheritable_attributes'
 require 'httparty/cookie_hash'

lib/httparty/parser.rb

@@ -110,12 +110,7 @@ module HTTParty
     end
 
     def json
-      # https://github.com/sferik/rails/commit/5e62670131dfa1718eaf21ff8dd3371395a5f1cc
-      if MultiJson.respond_to?(:adapter)
-        MultiJson.load(body)
-      else
-        MultiJson.decode(body)
-      end
+      JSON.load(body, nil)
     end
 
     def html

spec/httparty/parser_spec.rb

@@ -144,14 +144,8 @@ describe HTTParty::Parser do
       subject.send(:xml)
     end
 
-    it "parses json with MultiJson" do
-      MultiJson.should_receive(:load).with('body')
-      subject.send(:json)
-    end
-
-    it "uses MultiJson.decode if MultiJson does not respond to adapter" do
-      MultiJson.should_receive(:respond_to?).with(:adapter).and_return(false)
-      MultiJson.should_receive(:decode).with('body')
+    it "parses json with JSON" do
+      JSON.should_receive(:load).with('body', nil)
       subject.send(:json)
     end