Created
June 17, 2013 13:04
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Ghetto Django page profiler
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""" | |
Source, unknown. | |
Tweaked by Daniel Von Fange. | |
""" | |
import sys | |
import tempfile | |
import hotshot | |
import hotshot.stats | |
from django.conf import settings | |
from cStringIO import StringIO | |
from django.db import connection | |
class ProfileMiddleware(object): | |
""" | |
Displays hotshot profiling for any view. | |
http://yoursite.com/yourview/?prof | |
Add the "prof" key to query string by appending ?prof (or &prof=) | |
and you'll see the profiling results in your browser. | |
It's set up to only be available in django's debug mode, | |
but you really shouldn't add this middleware to any production configuration. | |
I add it to my settings.py file on my local dev machine by doing:: | |
from settings_default import MIDDLEWARE_CLASSES | |
MIDDLEWARE_CLASSES += tuple(['shared.middleware.ProfileMiddleware']) | |
""" | |
def process_request(self, request): | |
if settings.DEBUG and 'prof' in request.GET: | |
self.tmpfile = tempfile.NamedTemporaryFile() | |
self.prof = hotshot.Profile(self.tmpfile.name) | |
def process_view(self, request, callback, callback_args, callback_kwargs): | |
if settings.DEBUG and 'prof' in request.GET: | |
return self.prof.runcall(callback, request, *callback_args, **callback_kwargs) | |
def process_response(self, request, response): | |
if settings.DEBUG and 'prof' in request.GET: | |
self.prof.close() | |
out = StringIO() | |
old_stdout = sys.stdout | |
sys.stdout = out | |
stats = hotshot.stats.load(self.tmpfile.name) | |
#stats.strip_dirs() | |
stats.sort_stats('time', 'calls') | |
stats.print_stats() | |
sys.stdout = old_stdout | |
stats_str = out.getvalue() | |
sql_qs = [""+str(q['time'])+"\t"+q['sql'] for q in connection.queries] | |
sql_str = "\n".join(sql_qs) | |
if response and response.content and stats_str: | |
response.content = "<pre>" + stats_str + "\n\n"+ sql_str+"</pre>" | |
return response |
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