Python Flask 故意空响应
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Python Flask Intentional Empty Response
提问by RukTech
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
有没有办法返回make_response()具有某些属性的响应（来自对象或类似的），这样它就不会再次呈现页面，也不做任何其他事情。我正在尝试在服务器上运行代码而不生成任何输出
A simple 'return None' produces:
一个简单的“返回无”产生：
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:
这应该是可能的，因为以下仅下载文件而不呈现模板：
myString = "First line of a document"
response = make_response(myString)
response.headers["Content-Disposition"] = "attachment; filename=myFile.txt"
return response
采纳答案by Martijn Pieters
You are responding to a request, your HTTP server mustreturn something. The HTTP 'empty response' response is 204 No Content:
您正在响应请求，您的 HTTP 服务器必须返回某些内容。HTTP“空响应”响应是204 No Content：
return ('', 204)
Note that returning a file to the browser is notan empty response, just different from a HTML response.
请注意，向浏览器返回文件不是空响应，只是与 HTML 响应不同。
