防止rails 3上的ruby解析JSON帖子 [英] Prevent ruby on rails 3 from parsing JSON post

问题描述

我在Ruby on Rails 3中有一个控制器方法，它接受application / JSON作为内容类型。这一切都按预期工作，但我实际上不希望rails自动解析POST请求正文中的JSON。此方法充当网关，只是将信息传递到队列中，并且可能非常大。我不想浪费时间将数据处理到@_params，因为这是不必要的。

I have a controller method in Ruby on Rails 3 that accepts application/JSON as the content type. This all works as expected, but I actually do not want rails to automatically parse the JSON in the body of the POST request. This method is acting as a gateway and just shuttles the information in to a queue and could be quite large. I do not want to waste the time processing the data in to the @_params since it's unnecessary.

我相信我可以通过设置内容类型来解决这个问题。请求的标头，但我想在HTTP请求的语义上正确。

I believe I could get around this by setting the content-type in the header of the request to something else, but I would like to be semantically correct for the HTTP requests.

如何禁用此功能？

编辑：
更具体地说，如何为这一条路线编辑此功能？

more specifically how can I edit this functionality for just this one route?

推荐答案

参数解析在actionpack的 lib / action_dispatch / middleware / params_parser.rb 中非常深入。

Parameter parsing is baked pretty deeply inside actionpack's lib/action_dispatch/middleware/params_parser.rb.

I我说你最好的办法是用Rack拦截请求，就像这样。

I'd say the best you're going to get away with is intercepting the request with Rack, something like this.

在 lib / raw_json中。 rb

module Rack
  class RawJSON
    def initialize(app)
      @app = app
    end

    def call(env)
      request = Request.new(env)
      if request.content_type =~ /application\/json/i
        # test request.path here to limit your processing to particular actions
        raw_json = env['rack.input'].read
        env['CONTENT_TYPE'] = 'application/x-www-form-urlencoded'
        env['rack.input'] = StringIO.new("raw_json=#{raw_json}")
      end
      return @app.call(env)
    end
  end
end

在 config.ru 中，在调用 run< your app name> :: Application之前插入此内容

require 'raw_json'
use Rack::RawJSON

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