强制所有收到的请求内容类型为JSON [英] Force all received requests Content-Type to JSON

问题描述

实际上，我工作的，它使用的Rails 4.一个API，我想设置成JSON请求的内容类型如果客户未指定媒体类型在内容类型头。

为了得到这种行为我尝试添加以下 before_action 在我的的ApplicationController ：

 高清set_request_default_content_type
  request.format =：JSON
结束
 

在我的 RegistrationsController＃创建方法我有一个断点来检查，如果一切工作正常。那么， request.format 招不起作用，尽管值设置为应用程序/ JSON 似乎控制器（或Rails内部）不考虑接收到的请求的Content-Type为JSON。

我做了以下机身POST请求（没有内容类型）：

  {用户：{电子邮件：[e-mail]，密码：foobarfoo}}
 

通过与调试撬我看到：

  [2] API（＃＆LT; V1 :: RegistrationsController＆GT;）_ request.format.to_s
 = GT; 应用/ JSON
 [3] API（＃＆LT; V1 :: RegistrationsController＆GT;）_ PARAMS
 = GT; {
       行动=＆GT; 创建，
   控制器=＆GT; V1 /注册
 }
 

这意味着Rails的没有考虑过我与配置request.format哑剧:: JSON 的要求，而是和默:: ALL ，所以它并没有解析请求的JSON身上。 （

解决方案

 类V1 :: RegistrationsController＆LT; ApplicationController中
  respond_to代码：JSON
结束
 

使得默认格式效应初探JSON

I'm actually working on an API which uses Rails 4. I would like to set the Content-Type of a request to JSON if the client does not specify a media type in Content-Type header.

In order to get that behaviour I tried to add the following before_action in my ApplicationController :

def set_request_default_content_type
  request.format = :json
end

In my RegistrationsController#create method I have a breakpoint to check if everything is working. Well, the request.format trick does not work, despite the value is set to application/json it seems that the controller (or Rails internals) do not consider the received request's Content-Type as JSON.

I did a POST request with the following body (and no Content-Type) :

{"user" : {"email":"[e-mail]","password":"foobarfoo"}}

By debugging with Pry I see that :

 [2] api(#<V1::RegistrationsController>) _  request.format.to_s
 => "application/json"
 [3] api(#<V1::RegistrationsController>) _  params
 => {
       "action" => "create",
   "controller" => "v1/registrations"
 }

It means that Rails did not have considered my request with the request.format configured with Mime::JSON, but instead with Mime::ALL and so it didn't parse the request's JSON body. :(

解决方案

class V1::RegistrationsController < ApplicationController
  respond_to :json
end

Makes the default reponse format json

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