爲什麼不起作用機架？

Question

配置/ application.rb中

require_relative 'boot' 
require 'rails/all' 
Bundler.require(*Rails.groups) 

module MyApp 
class Application < Rails::Application 
    config.middleware.insert_before ActionDispatch::Static, Rack::Cors do 
    allow do 
    origins '*' 
    resource '*', :headers => :any, :methods => [:get, :post, :options, :patch, :delete] 
     end 
    end 
    end 
end 

的Gemfile

gem 'rack-cors', :require => 'rack-cors' 

another gems… 

束EXEC耙中間件

use Rack::Cors 

another middleware… 

這是一個錯誤顯示控制檯日誌

XMLHttpRequest cannot load https://example.com. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access. The response had HTTP status code 405.

我該怎麼辦？

Answer 1

試着將你的代碼改成這樣。我試過在我的rails 5中只添加下面的行會工作。然後嘗試重新啓動服務器。

module YourApp 
    class Application < Rails::Application 
    # Rails 5 

    config.middleware.insert_before 0, Rack::Cors do 
     allow do 
     origins '*' 
     resource '*', :headers => :any, :methods => [:get, :post, :options] 
     end 
    end 
    end 
end 

我希望它的作品。