如何在导轨中返回真正的空体?即内容长度 0 [英] How to return truly empty body in rails? i.e. content-length 0

问题描述

我试图返回 200 状态并带有一个空的主体，但 rails 返回一个带有单个空格的主体.即内容长度 1

I'm trying to return a 200 status with an empty body but rails returns a body with a single space. i.e. content-length 1

例如，此代码生成一个带有单个空格的正文

For instance, this code generates a body with the single space

respond_to do |f|
  f.html {head :ok}
end

也是这样

respond_to do |f|
  f.html {render :nothing => true}
end

是的，即使是 render :nothing 也会产生一些东西.

Yes, even render :nothing generates something.

所有这些似乎都源自 2005 年的 rails 补丁，该补丁旨在修复 Safari 中的一个错误，如果正文为空，它将忽略标题.(http://dev.rubyonrails.org/changeset/1818)

All of this seems to be flowing from a 2005 patch in rails that was designed to fix a bug in Safari where it would ignore the headers if the body was empty. (http://dev.rubyonrails.org/changeset/1818)

有没有人对如何获得 200 状态但身体真正空虚有任何想法?背景:我正在使用一个 API 来调用我的控制器.我需要发送 200 但单个空格正文导致 API 出现故障(解析错误...).此外，我将部署到 Heroku，因此我无法修补 ActionPack 来撤消 2005 年的黑客攻击.

Does anyone have any thoughts on how to get a 200 status but with a truly empty body? Background: I'm using an API that makes calls to my controllers. I need to send a 200 but the single space body causes the API to malfunction (parse error...). Also, I'll be deploying to Heroku so I can't patch ActionPack to undo the 2005 hack.

感谢您的任何想法.

推荐答案

这似乎有效

render :text => ""

对于 Rails 3，您可以使用:

For Rails 3, you could use:

render :nothing =>真实

在 Rails 5 中，render :nothing =>true 已弃用(计划在 5.1 中移除)

In Rails 5, render :nothing => true is deprecated (planned for removal in 5.1)

使用

def action
  head :ok
end

感谢 Rails 5 解决方案的这个问题.

Credit to this question for the Rails 5 solution.

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