Ruby on rails 4 在尝试使用omniauth github对用户进行身份验证时，如何修复404页？

每次单击“使用Github登录”按钮时，都会看到一个未找到的页面。当我尝试http://127.0.0.1:3000/auth/github/callback 我得到一个名为OmniAuth:：Strategies:：OAuth2:：CallbackError的错误，它表示检测到csrf |检测到csrf。这是我的密码：

初始化者/omniauth.rb：

OmniAuth.config.logger = Rails.logger

Rails.application.config.middleware.use OmniAuth::Builder do
    provider :github, ENV['GITHUB_ID'], ENV['GITHUB_SECRET'],
        :scope => 'user,public_repo', 
        :redirect_uri => ENV['http://127.0.0.1:3000']
end

routes.rb：

root 'users#new'
  get '/auth/:provider/callback' => 'sessions#create'
  get '/signout' => 'sessions#destroy', as: :signout
end

视图/用户/new.html.erb：

<% if current_user %>
<h1> Welcome: </h1>
<h2><%= link_to 'Sign out', signout_path %></h2>
<% else %>
<h2><%= link_to 'Sign in with Github', "/auth/github" %></h2>
<% end %>

会话\u controller.rb：

class SessionsController < ApplicationController
  def new
  end

  def create
  auth = request.env["omniauth.auth"]
    user = User.where(:provider => auth['provider'], :uid => auth['uid'].to_s).first || User.from_omniauth(auth)
    reset_session
    session[:user_id] = user.id
    redirect_to root_url, :notice => "Signed in!"
  end

    def destroy
        session[:user_id] = nil
        redirect_to root_url, :notice => 'Signed out!'
    end

  def failure
    redirect_to root_url, :alert => "Authentication error: #{params[:message].humanize}"
  end
end

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception
  helper_method :current_user

private
  def current_user
    @current_user ||= User.find(session[:user_id]) if session[:user_id]
  end 
end

user.rb：

class User < ActiveRecord::Base
    def self.from_omniauth(auth)
       # where(auth.slice(:provider, :uid)).first_or_initialize.tap 
       create! do |user|
       user.provider = auth.provider
       user.uid = auth.uid
       user.name = auth.info.name
       user.oauth_token = auth.credentials.token
       user.oauth_expires_at = Time.at(auth.credentials.expires_at)
       user.save!
     end
   end
end

应用程序_controller.rb：

class SessionsController < ApplicationController
  def new
  end

  def create
  auth = request.env["omniauth.auth"]
    user = User.where(:provider => auth['provider'], :uid => auth['uid'].to_s).first || User.from_omniauth(auth)
    reset_session
    session[:user_id] = user.id
    redirect_to root_url, :notice => "Signed in!"
  end

    def destroy
        session[:user_id] = nil
        redirect_to root_url, :notice => 'Signed out!'
    end

  def failure
    redirect_to root_url, :alert => "Authentication error: #{params[:message].humanize}"
  end
end

class ApplicationController < ActionController::Base
  # Prevent CSRF attacks by raising an exception.
  # For APIs, you may want to use :null_session instead.
  protect_from_forgery with: :exception
  helper_method :current_user

private
  def current_user
    @current_user ||= User.find(session[:user_id]) if session[:user_id]
  end 
end

---

请帮忙

错误404表示找不到文件或目录。换句话说，服务器接收并理解了您的请求，并且非常愿意满足请求，但是您请求的数据不存在

我通过在OmniAuth初始值设定项文件中的provider语句末尾添加scope:“user:email”来修复此错误

Rails.application.config.middleware.use OmniAuth::Builder do
  provider :github, ENV['GITHUB_KEY'], ENV['GITHUB_SECRET'], scope: 'user:email'
end

---

您能告诉我如何尝试修复它吗？问题不是关于404的含义，而是关于在使用omniauth github时修复404问题。我也想听到一个解决办法。