Rails parses JSON automatically when proper headers are present

README.md

@@ -49,6 +49,8 @@ end
 ```
 
 ## Changelog
+v0.2.1 Use built-in rails JSON parser.
+
 v0.2.0 Supports version 3 of the Sendgrid webhook released on 
 September 6th, 2013, which provides the proper headers and JSON post body
 without hacks or middleware. If upgrading to this version, please make sure

app/controllers/gridhook/events_controller.rb

@@ -1,7 +1,7 @@
 module Gridhook
   class EventsController < ActionController::Base
     def create
-      Gridhook::Event.process(request.body, params)
+      Gridhook::Event.process(params)
       head :ok
     end
   end

gridhook.gemspec

@@ -20,7 +20,6 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['app', 'lib']
 
   spec.add_dependency 'rails', '>= 3.1.0'
-  spec.add_dependency 'multi_json', '>= 1.3.0'
 
   spec.add_development_dependency 'bundler', '~> 1.2'
   spec.add_development_dependency 'rake'

lib/gridhook/event.rb

@@ -9,15 +9,10 @@ class Event
     # body - A String or stream for MultiJson to parse
     #
     # Returns nothing.
-    def self.process(body, params = {})
-      begin
-        event = MultiJson.load(body)
-        if event.is_a?(Array)
-          process_events event
-        else
-          process_event event
-        end
-      rescue MultiJson::LoadError
+    def self.process(params = {})
+      if params.has_key? "_json"
+        process_events params["_json"]
+      else
         process_event params.except(:controller, :action)
       end
     end

lib/gridhook/version.rb

@@ -1,3 +1,3 @@
 module Gridhook
-  VERSION = '0.2.0'
+  VERSION = '0.2.1'
 end