使用Rack-cors和Grape添加自定义响应头 [英] Add custom response header with Rack-cors and Grape

问题描述

我正在使用Ruby on Rails API开发Ionic(Cordova)应用程序. 我想使用响应头在登录后返回令牌. 我正在使用rack-cors gem来执行跨源请求:

I'm developing a Ionic(Cordova) app with a Ruby on Rails API. I want to use response headers to return a token after login. I'm using rack-cors gem to make Cross Origin Request work:

config.middleware.insert_after Rails::Rack::Logger, Rack::Cors, :logger => Rails.logger do
      allow do
        origins '*'
        resource '/api/*', :headers => :any, :methods => [:get, :post, :options, :put]
      end
    end

和葡萄宝石来管理我的API路由. 但是自从我添加rack-cors以来，我无法找到一种在响应中添加标头的方法.

and grape gem to manage my API routes. But i can't find a way to add a header to my response since i added rack-cors.

我尝试过:

header('Access-Token', user.token.key)

但是它不起作用.无论我做什么，我最终都会得到这些标题:

But it doesn't work. Whatever i do i end up with those headers:

{缓存控制:最大年龄= 0，私有，必须重新验证"，内容类型: " application/json'}

{cache-control: "max-age=0, private, must-revalidate", content-type: "application/json"}

有人可以帮助我解决这个问题吗?

Can anyone help me with this issue ?

推荐答案

我使用了gem 'devise_token_auth'

此外，我在application.rb中有此配置.

Also, i had this configuration in application.rb.

  class Application < Rails::Application
    # Do not swallow errors in after_commit/after_rollback callbacks.
    config.active_record.raise_in_transactional_callbacks = true

    config.middleware.use Rack::Cors do
      allow do
        origins '*'
        resource '*',
          :headers => :any,
          :expose  => ['access-token', 'expiry', 'token-type', 'uid', 'client'],
          :methods => [:get, :post, :options, :delete, :put]
      end
    end

  end

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