Mercurial > kallithea
comparison pylons_app/lib/profiler.py @ 15:c8265b4f0c2a
added log4j to development,
author | Marcin Kuzminski |
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date | Sun, 21 Feb 2010 14:24:50 +0100 |
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14:923f0e6ab010 | 15:c8265b4f0c2a |
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1 from __future__ import with_statement | |
2 | |
3 import cProfile | |
4 import pstats | |
5 import cgi | |
6 import pprint | |
7 import threading | |
8 | |
9 from StringIO import StringIO | |
10 | |
11 class ProfilingMiddleware(object): | |
12 def __init__(self, app): | |
13 self.lock = threading.Lock() | |
14 self.app = app | |
15 | |
16 | |
17 def __call__(self, environ, start_response): | |
18 with self.lock: | |
19 profiler = cProfile.Profile() | |
20 def run_app(*a, **kw): | |
21 self.response = self.app(environ, start_response) | |
22 | |
23 profiler.runcall(run_app, environ, start_response) | |
24 | |
25 profiler.snapshot_stats() | |
26 | |
27 stats = pstats.Stats(profiler) | |
28 stats.sort_stats('cumulative') | |
29 | |
30 # Redirect output | |
31 out = StringIO() | |
32 stats.stream = out | |
33 | |
34 stats.print_stats() | |
35 | |
36 resp = ''.join(self.response) | |
37 | |
38 # Lets at least only put this on html-like responses. | |
39 if resp.strip().startswith('<'): | |
40 ## The profiling info is just appended to the response. | |
41 ## Browsers don't mind this. | |
42 resp += '<pre style="text-align:left; border-top: 4px dashed red; padding: 1em;">' | |
43 resp += cgi.escape(out.getvalue(), True) | |
44 | |
45 output = StringIO() | |
46 pprint.pprint(environ, output, depth=3) | |
47 | |
48 resp += cgi.escape(output.getvalue(), True) | |
49 resp += '</pre>' | |
50 | |
51 return resp | |
52 | |
53 |