middleware.py 文件源码

def process_request(self, request):
        """
        Setup the profiler for a profiling run and clear the SQL query log.

        If this is a resort of an existing profiling run, just return
        the resorted list.
        """
        def unpickle(params):
            stats = unpickle_stats(b64decode(params.get('stats', '')))
            queries = cPickle.loads(b64decode(params.get('queries', '')))
            return stats, queries

        if request.method != 'GET' and \
           not (request.META.get(
               'HTTP_CONTENT_TYPE', request.META.get('CONTENT_TYPE', '')
           ) in ['multipart/form-data', 'application/x-www-form-urlencoded']):
            return
        if (request.REQUEST.get('profile', False) and
            (settings.DEBUG == True or request.user.is_staff)):
            request.statsfile = tempfile.NamedTemporaryFile()
            params = request.REQUEST
            if (params.get('show_stats', False)
                and params.get('show_queries', '1') == '1'):
                # Instantly re-sort the existing stats data
                stats, queries = unpickle(params)
                return display_stats(request, stats, queries)
            elif (params.get('show_queries', False)
                  and params.get('show_stats', '1') == '1'):
                stats, queries = unpickle(params)
                return display_queries(request, stats, queries)
            else:
                # We don't have previous data, so initialize the profiler
                request.profiler = hotshot.Profile(request.statsfile.name)
                reset_queries()