README

Facebook Information get without any Library Files 😃 :

Steps:

1.Create facebook developer acccount

2.Go to facebook developer page then create App

3.Get your app client_id and client_secret id

Facebook Login for Web and Mobile Devices Using Ruby on Rails :

include the gem in your Gemfile:

gem 'rest-client'

And then execute:

$ bundle install

Steps:

1.rails g model oauth

2.rake db:migrate

3.rails g controller oauth facebook_oauth

facebook_oauth Functions :

Oauth.rb File

 # Get accesstoken using facebook graph Api
  def self.facebookAccessTokenCheckWithCode(code,redirect_uri)
 
      user = Hash.new
      begin

	  response = RestClient.get "#{'https://graph.facebook.com/oauth/access_token?client_id=1234&client_secret=1234&redirect_uri='}#{redirect_uri}#{'&code='}#{code}"
	token_res = JSON.parse(response.body)
	if (accessToken = token_res["access_token"])
	  user = facebookAccessTokenCheck(accessToken)
	else
	  user["res"] = token_res
	  user["status"] = false
	end

      rescue Exception => e
	user["message"] = e.message
	user["status"] = false
      end

      return user

end

# Get information from facebook using accessToken
def self.facebookAccessTokenCheck(accessToken)
 
     details = Hash.new

      begin

	 response = RestClient.get "#{'https://graph.facebook.com/v2.8/me?fields=first_name,last_name,email,picture.type(small)&access_token='}#{accessToken}"
	 profile = JSON.parse(response.body)
	 details["unique_id"] =  profile['id']
	 details["email"] =  profile['email']
	 details["name"] = profile['first_name'] + profile["last_name"]
	 details["access_token"] = accessToken
	 details["image"] = profile["picture"]["data"]["url"]
	 details["provider"] = "facebook"
      rescue Exception => e
	 details = e.message
	 details["status"] = false

      end

      return details

end 

routes.rb File:

post 'oauth' => "oauth#facebook_oauth"

Sample Response :