Rest – I have a middleware where I a want to log every request/response. How to access to POST data

djangorest

I have this middleware 

import logging

request_logger = logging.getLogger('api.request.logger')


class LoggingMiddleware(object):

    def process_response(self, request, response):
        request_logger.log(logging.DEBUG,
               "GET: {}. POST: {} response code: {}. response "
               "content: {}".format(request.GET, request.DATA,
                                       response.status_code,
                                       response.content))
        return response

The problem is that request in process_response method has no .POST nor .DATA nor .body. I am using django-rest-framework and my requests has Content-Type: application/json

Note, that if I put logging to process_request method – it has .body and everything I need. However, I need both request and response in a single log entry.

Best Answer

Here is complete solution I made

"""
Api middleware module
"""
import logging

request_logger = logging.getLogger('api.request.logger')


class LoggingMiddleware(object):
    """
    Provides full logging of requests and responses
    """
    _initial_http_body = None

    def process_request(self, request):
        self._initial_http_body = request.body # this requires because for some reasons there is no way to access request.body in the 'process_response' method.


    def process_response(self, request, response):
        """
        Adding request and response logging
        """
        if request.path.startswith('/api/') and \
                (request.method == "POST" and
                         request.META.get('CONTENT_TYPE') == 'application/json'
                 or request.method == "GET"):
            request_logger.log(logging.DEBUG,
                               "GET: {}. body: {} response code: {}. "
                               "response "
                               "content: {}"
                               .format(request.GET, self._initial_http_body,
                                       response.status_code,
                                       response.content), extra={
                    'tags': {
                        'url': request.build_absolute_uri()
                    }
                })
        return response

Note, this

'tags': {
    'url': request.build_absolute_uri()
}

will allow you to filter by url in sentry.

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