在rails中，我可以在操作返回之前访问response.body吗？

In rails, can I access response.body in a action before it returns?

在rails中,我可以在操作返回之前访问response.body吗?

Say I want to do some final string replacements before it returns, can I get access to response.body i.e. the response that the view returns?

假设我想在返回之前做一些最终的字符串替换,我可以访问response.body,即视图返回的响应吗?

4 个解决方案

#1

You can write a rack middleware to do such kind of replacements. Code for the rack is.

您可以编写机架中间件来进行此类替换。机架代码是。

module Dump
  require 'rack'

  class Response
    def initialize(app)
       @app=app
    end

    def call(env)
       res=@app.call(env)
       res.body #change this and but also update res.length and header["Content-Length"]
       return res
    end
  end
end

include it in some file, lets call it dump_response.rb in RAILS_ROOT/lib folder. And line

将它包含在某个文件中,让我们在RAILS_ROOT / lib文件夹中将其命名为dump_response.rb。和线

use Dump::Response

in config.ru

#2

Try after_filter in your controller.

在控制器中尝试after_filter。

You should be able to edit your response.body from there. For me, I needed to remove some ASCII characters in the xml hence I did this.

你应该可以从那里编辑你的response.body。对我来说,我需要删除xml中的一些ASCII字符,因此我这样做了。

after_filter :sanitize_xml

def sanitize_xml
   #clean the response body by accessing response.body

#3

The poor-man's way is to do this:

穷人的方法是做到这一点:

str = render_to_string "mycontroller/mytemplate"
str.gsub!(/blah/,'')
render :text => str

#4

You can simply overwrite rails render function in a controller, like this:

您可以简单地在控制器中覆盖rails render函数,如下所示:

def render *args, &block
  super
  response.body.gsub!(/blah/,'')
end

#1