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

问题描述

有没有办法返回具有某些属性的响应(来自 make_response() 对象或类似对象)，这样它就不会再次呈现页面并且不执行任何其他操作.我正在尝试在服务器上运行代码而不生成任何输出

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

一个简单的返回无"产生:

A simple 'return None' produces:

ValueError: View function did not return a response

这应该是可能的，因为以下仅下载文件而不呈现模板:

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

推荐答案

你正在响应一个请求，你的 HTTP 服务器必须返回something.HTTP '空响应' 响应是 204 No Content:

You are responding to a request, your HTTP server must return something. The HTTP 'empty response' response is 204 No Content:

return ('', 204)

请注意，向浏览器返回文件不是一个空响应，只是与 HTML 响应不同.

Note that returning a file to the browser is not an empty response, just different from a HTML response.

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