第三方平台登录-GoogleOpenID

第三方平台登录GoogleOpenID

ruby 1.9.3 rails 3.2.16 devise 3.2.2 omniauth 1.1.4

1.install omniauth openid

# Gemfile
gem 'omniauth-openid'

bundle

2.在devise中设置GoogleOpenID

# config/initializers/devise.rb
require "openid/store/filesystem"
require 'omniauth-openid'
Devise.setup do |config|
  config.omniauth :open_id, :store => OpenID::Store::Filesystem.new('/tmp'),
        :name => 'google', :identifier => 'https://www.google.com/accounts/o8/id', :require => 'omniauth-openid'
end

3.给users表添加字段

rails g migration add_provider_and_uid_on_users
# db/******_add_provider_and_uid_on_users.rb
def up
  add_column :users, :provider, :string
  add_column :users, :uid,      :string
end

def down
  remove_column :users, :provider
  remove_column :users, :uid
end

4.在model user中设置 omniauthable并添加from_omniauth方法

# app/models/user.rb
devise :omniauthable, :omniauth_providers => [:google]
attr_accessible :provider, uid

def self.from_omniauth(auth)
  if auth.info.email && User.find_by_email(auth.info.email)
    user.provider = auth.provider
    user.uid = auth.uid
    user
  else
    where(provider: auth.provider, uid: auth.uid.to_s).first_or_create do |user|
      user.provider = auth.provider
      user.uid = auth.uid
      user.nickname = auth.info.nickname
      user.email = auth.info.email
      user.avatar = auth.info.image
    end
  end
end

5.设置路由添加回调的controller

config/routes.rb
devise_for :users, controllers: { omniauth_callbacks: 'omniauth_callbacks' }

6.编写controller相应方法action

# app/controllers/omniauth_callbacks_controller.rb
def google
  omniauth_callback('Google')
end

def omniauth_callback(kind)
  user = User.from_omniauth(env['omniauth.auth'])
  if user.persisted?
    flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => kind
    sign_in_and_redirect user
  else
    session['devise.user_attributes'] = user.attributes
    flash.notice = "认证失败"
    redirect_to new_user_registration_url
  end
end

7.编写view页面

# app/views/layouts/shared/_omniauth_link.html.erb

<%- if devise_mapping.omniauthable? %>
  <div class='box'>
  <h4> 授权认证登录</h4>
  <%- resource_class.omniauth_providers.each do |provider| %>
      <%= omniauth_link(resource_name, provider) %>
  <% end -%>
  </div>
<% end -%>

8.提供相应的helper

# app/helpers/links_helper.rb
module LinksHelper
  def omniauth_link(resource_name, provider)
    str = <<-DOC
    <a href='#{ omniauth_authorize_path(resource_name, provider) }' class='btn btn-social btn-block btn-#{ t ".#{provider}" }' >
      <i class='fa fa-#{t ".#{provider}" }'></i>#{ t 'omniauth_text', provider_name: t(".#{provider}_text") }
    </a>
    DOC
    str.html_safe
  end
end