auf_savoirs_en_partage/savoirs/middleware.py

   1 import sys
   2 import tempfile
   3 import hotshot
   4 import hotshot.stats
   5 from django.conf import settings
   6 from cStringIO import StringIO
   7
   8 class ProfileMiddleware(object):
   9     """
  10     Displays hotshot profiling for any view.
  11     http://yoursite.com/yourview/?prof
  12
  13     Add the "prof" key to query string by appending ?prof (or &prof=)
  14     and you'll see the profiling results in your browser.
  15     It's set up to only be available in django's debug mode,
  16     but you really shouldn't add this middleware to any production configuration.
  17     * Only tested on Linux
  18     """
  19     def process_request(self, request):
  20         if settings.DEBUG and request.GET.has_key('prof'):
  21             self.tmpfile = tempfile.NamedTemporaryFile()
  22             self.prof = hotshot.Profile(self.tmpfile.name)
  23
  24     def process_view(self, request, callback, callback_args, callback_kwargs):
  25         if settings.DEBUG and request.GET.has_key('prof'):
  26             return self.prof.runcall(callback, request, *callback_args, **callback_kwargs)
  27
  28     def process_response(self, request, response):
  29         if settings.DEBUG and request.GET.has_key('prof'):
  30             self.prof.close()
  31
  32             out = StringIO()
  33             old_stdout = sys.stdout
  34             sys.stdout = out
  35
  36             stats = hotshot.stats.load(self.tmpfile.name)
  37             #stats.strip_dirs()
  38             stats.sort_stats('cumulative', 'calls')
  39             stats.print_stats()
  40
  41             sys.stdout = old_stdout
  42             stats_str = out.getvalue()
  43
  44             if response and response.content and stats_str:
  45                 response.content = "<pre>" + stats_str + "</pre>"
  46
  47         return response