Python烧瓶故意空响应 [英] Python Flask Intentional Empty Response

问题描述

有没有办法从某个属性返回一个响应（来自make_response（）对象或类似的），这样它就不会再次渲染页面，也不会做任何事情。我试图在服务器上运行一个代码，而不产生任何输出

一个简单的'返回无'产生：

< pre $ ValueError：View函数没有返回响应


应该是可能的，因为下面只是下载一个文件，并不呈现模板：

  myString =文档的第一行
 response = make_response（myString）
 response.headers [Content-Disposition] =attachment; filename = myFile.txt
返回响应
  
             p>您正在响应请求，您的HTTP服务器必须返回 。 HTTP的空响应响应是 204 No Content ： 
 
 
  return （''，204）
  
请注意，将文件返回给浏览器不是 em>一个空的响应，与HTML响应不同。
 
Is there a way to return a response (from make_response() object or similar) with certain properties so that it doesn't render the page again and doesn't do anything else either. I am trying to run a code on the server without generating any output 

A simple 'return None' produces:
ValueError: View function did not return a response
This should be possible because the following only downloads a file and doesn't render the template: 
myString = "First line of a document"
response = make_response(myString)
response.headers["Content-Disposition"] = "attachment; filename=myFile.txt"
return response
Any help will be greatly appreciated!
解决方案
You are responding to a request, your HTTP server must return something. The HTTP 'empty response' response is 204 No Content:
return ('', 204)
Note that returning a file to the browser is not an empty response, just different from a HTML response.

                        
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