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import sys | |
import tempfile | |
import hotshot | |
import hotshot.stats | |
from django.conf import settings | |
from cStringIO import StringIO | |
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. | |
* Only tested on Linux | |
""" | |
def process_request(self, request): | |
if settings.DEBUG and request.GET.has_key('prof'): | |
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 request.GET.has_key('prof'): | |
return self.prof.runcall(callback, request, *callback_args, **callback_kwargs) | |
def process_response(self, request, response): | |
if settings.DEBUG and request.GET.has_key('prof'): | |
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() | |
if response and response.content and stats_str: | |
response.content = "<pre>" + stats_str + "</pre>" | |
return response | |
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