无法使用omniauth-google-oauth2登录，导致您正在重定向

Question

我在Windows 7 32位主机中使用Vagrant与框ubuntu/trusty32设置了Rails应用程序。该应用具有Google OAuth登录功能。 Gemfile中有以下的宝石吧：

gem 'omniauth' 
gem 'omniauth-google-oauth2' 

而且在/config/initializers/devise.rb：

config.omniauth :google_oauth2, ENV["GOOGLE_APP_ID"], ENV["GOOGLE_APP_SECRET"] 
    OmniAuth.config.full_host = lambda do |env| 
    forwarded = env['HTTP_X_FORWARDED_FOR'] 
    forwarded.blank? ? "#{env['rack.url_scheme']}://#{env['HTTP_HOST']}" : "https://#{env['HTTP_HOST']}" 
    end 

当我尝试登录，它停止在该网址看到“您将被重定向”旁边没有发生。

http://localhost:3000/omniauths/auth/google_oauth2/callback?state=xxxx&code=xxx

我得到了以下日志：

Started GET "/omniauths/auth/google_oauth2" for 10.0.2.2 at 2017-10-07 11:07:21 +0000 
log writing failed. closed stream 
I, [2017-10-07T11:07:21.507524 #2581] INFO -- omniauth: (google_oauth2) Request phase initiated. 
Started GET "/omniauths/auth/google_oauth2/callback?state=xxxx&code=xxxx" for 10.0.2.2 at 2017-10-07 11:07:21 +0000 
log writing failed. closed stream 
I, [2017-10-07T11:07:22.155462 #2581] INFO -- omniauth: (google_oauth2) Callback phase initiated. 
Processing by SessionController#google_oauth2 as HTML 
log writing failed. closed stream 
    Parameters: {"state"=>"a6a1e7b1733c564b96ab650f360fbae63cff5bdc6a488f1a", "code"=>"4/D4aX9Bm9XQmSIm_RXBhBi1EXE1AHKp3Q-WVbSpNSdvE"} 
log writing failed. closed stream 
    Omniauth Load (4.5ms) SELECT `omniauths`.* FROM `omniauths` WHERE `omniauths`.`provider` = 'google_oauth2' AND `omniauths`.`uid` = '110281880098696358918' LIMIT 1 
log writing failed. closed stream 
    Permission::Organization Load (1.6ms) SELECT `permission_organizations`.* FROM `permission_organizations` WHERE `permission_organizations`.`domain` = 'gmail.com' LIMIT 1 
log writing failed. closed stream 
Redirected to http://localhost:3000/ 
log writing failed. closed stream 
Completed 403 Forbidden in 302ms (ActiveRecord: 17.4ms) 

的代码是不是我的，我不是一个红宝石专家了。所以我不知道为什么我被困在屏幕上。我还发现了一个控制器：

class SessionController < Devise::OmniauthCallbacksController 
    def google_oauth2 
    @omniauth = Omniauth.find_for_google(request.env['omniauth.auth']) 

    if @omniauth&.persisted? 
     @omniauth.user.last_sign_in = Time.now 
     @omniauth.user.save 
     flash[:notice] = 'I signed in with Google authentication' 
     sign_in_and_redirect @omniauth, event: :authentication 
    else 
     #redirect_to new_user_registration_url, alert: @user.errors.full_messages.join("\n") 
     redirect_to '/', status: :forbidden 
    end 
    end 
end 

这里是config/routes.rb

Rails.application.routes.draw do 
    devise_for :omniauths, controllers: { 
     omniauth_callbacks: "session" 
    } 
    mount RailsAdmin::Engine => '/rails_admin', as: 'rails_admin' 

    post '/api', to: "api#post" 
    post '/error_catch', to: "api#error_catch" 
    post '/error_log', to: "api#error_log" 
    get '/file/:uuid/:filename', to: "api#file" 
    get '/svg_parts/*dxf_path', to: "svg#part" 
    post '/svg/project(.:format)' 
    post '/svg/requirement(.:format)' 
    get '/svg/test(.:format)' 
    get '/pdf/owner_estimate' 
    get '/pdf/builder_estimate' 
    get '/pdf/wholesale_estimate' 

    get '/api/perform_test' 

    get '/pdf/requirement' 

    root to: "angular#index" 
    get '/assets/*path', controller: 'application', action: 'handle_404' 
    get '*path', to: "angular#index" 
end 

的信息并不对这个问题看够了吗？我还可以提供可能有所帮助的更多信息。

Answer 1

gemfile.rb

gem 'omniauth-google-oauth2' 

---

config/initializer/omniauth.rb

Rails.application.config.middleware.use OmniAuth::Builder do 
    provider :google_oauth2, ENV["GOOGLE_CLIENT_ID"], ENV["GOOGLE_CLIENT_SECRET"], 
    { 
     :name => "google", 
     :scope => "email, profile, plus.me, http://gdata.youtube.com", 
     :prompt => "select_account", 
     :image_aspect_ratio => "square", 
     :image_size => 50 
    } 
end 

---

config/initializer/devise.rb

config.omniauth :google_oauth2, ENV["GOOGLE_CLIENT_ID"], ENV["GOOGLE_CLIENT_SECRET"], {} 

---

routes.rb

devise_for :users, controllers: {registrations: 'users/registrations',omniauth_callbacks: 'users/omniauth_callbacks'} 

---

controllers/users/omniauth_callbacks_controller.rb

class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController 

def google_oauth2 
    @user = User.from_omniauth(request.env["omniauth.auth"]) 

    if @user.persisted? 
     flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Google" 
     sign_in_and_redirect @user, :event => :authentication 
    else 
     session["devise.google_data"] = request.env["omniauth.auth"] 
     redirect_to new_user_registration_url 
    end 
    end 
end 

---

app/views/devise/registrations/new.html.erb

<%- resource_class.omniauth_providers.each do |provider| %> 

    <%= link_to omniauth_authorize_path(resource_name, provider) do %> 
     <i class="fa fa-google-plus-official fa-2x" aria-hidden="true"</i> 

    <% end %> 
<% end -%> 
[... orginal devise view] 

---

/app/models/user.rb

class User 
    devise :omniauthable, omniauth_providers: [:google_oauth2] 
    [...] 
end 

---

我希望这将帮助你！