django中间件处理视图返回的数据之后，数据未返回修改之后的response

第一种方法：

Response已在中间件阶段进行渲染，因此您不仅可以更改response.data，还需要重新渲染或直接更改渲染的内容。

class RequestLogMiddleWare(object):
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        response = self.get_response(request)
        if isinstance(response, Response):
            response.data['detail'] = 'I have been edited'
            # you need to change private attribute `_is_render` 
            # to call render second time
            response._is_rendered = False 
            response.render()
        return response

第二种方法：

第二种方法是直接更改内容，但是在这种情况下，内置的REST Framework浏览器API将无法正常工作，因为模板无法正确呈现。

import json

class RequestLogMiddleWare(object):
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        response = self.get_response(request)
        if isinstance(response, Response):
            response.data['detail'] = 'I have been edited'
            response.content = json.dumps(response.data)
        return response

 第三种方法：

该方法更合理一些

class RequestLogMiddleWare(object):
    def __init__(self, get_response):
       self.get_response = get_response

    def __call__(self, request):
       response = self.get_response(request)
       return response

    def process_template_response(self, request, response):
       if hasattr(response, 'data'): 
          response.data['detail'] = 'bla-bla-bla'
       return response